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Journal articles on the topic 'Digital signal transmission'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Ishida, Jun-ichi. "Digital television (8); Digital signal transmission." Journal of the Institute of Television Engineers of Japan 39, no. 9 (1985): 822–31. http://dx.doi.org/10.3169/itej1978.39.822.

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2

Simpson, Robert J. "Book Review: Digital Signal Transmission." International Journal of Electrical Engineering & Education 30, no. 3 (1993): 279. http://dx.doi.org/10.1177/002072099303000317.

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3

YAN, LIUMING, YUEFEI MA, and JORGE M. SEMINARIO. "TERAHERTZ SIGNAL TRANSMISSION IN MOLECULAR SYSTEMS." International Journal of High Speed Electronics and Systems 16, no. 02 (2006): 669–75. http://dx.doi.org/10.1142/s0129156406003928.

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Terahertz signal transmission in DNA is simulated and analyzed using molecular dynamics and digital signal processing techniques to demonstrate that signals encoded in vibrational movements of hydrogen bonds can travel along the backbone of DNA and eventually be recovered and analyzed using digital signal processing techniques.

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4

Pochernyaev, V. N., N. M. Syvkova, and V. S. Povkhlib. "SPATIAL DIVERSITY SIGNAL TRANSMISSION IN DIGITAL TROPOSCATTER STATIONS." Proceedings of the O.S. Popov ОNAT 1, no. 2 (2020): 92–99. http://dx.doi.org/10.33243/2518-7139-2020-1-2-92-99.

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The article examines the possibility of increasing the normalized throughput of digital troposcatter stations on the way of using space-separated signal transmission. Shown is a block diagram of the transmitting path of a digital troposcatter station with space-separated signal transmission. Methods of separation at the reception of signals acting at the input of the space-time coding device of the transmission path of the microwave digital troposcatter station are analyzed. Three methods of signal addition are considered in detail: linear addition; auto selection; optimal (quasi-optimal) addition. Various variants of addition are analyzed: before the demodulator and after the demodulator. The calculation of the normalized channel capacity as a function of the signal-to-noise ratio for the case of two transmitting antennas with known and unknown channel matrices is carried out. It was found that with two transmitting antennas and an unknown channel matrix, the normalized bandwidth does not differ from the case of using one transmitting antenna. The effect of cross-polarization isolation on the normalized channel capacity is analyzed, when one transmitting antenna emits signals of horizontal polarization, and the second transmitting antenna emits signals of vertical polarization. The values of the error probability are obtained for spatially-separated signal transmission to two transmitting antennas for two laws of distribution of a random variable - Rayleigh and Rice. The Rice distribution law of a random variable, the error probability is expressed through the modified zero-order Bessel function. The calculated data are shown in the table. The calculation was carried out in two frequency ranges allowed for the use of troposcatter communication facilities and for a channel without fading and for a channel with intersymbol interference.

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5

Zhong, Zi Jing, Guang Dong Liu, Ying Yu, and Chao Chen. "The High-Speed Video Signals Fiber Transmission Design Using of Optical Fiber in Photoelectric Tracking Equipment." Advanced Materials Research 760-762 (September 2013): 298–301. http://dx.doi.org/10.4028/www.scientific.net/amr.760-762.298.

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To improve the quality of the signal transmission and increase the bandwidth in the photoelectric tracking equipment, a kind of mixed transmission design of low-speed digital signals and high-speed digital video signals in use of optical fiber has been carried out. And in the system the high-speed parallel and serial transmission cells realizes the serial and de-serial of the digital video signals in use of the Agilent chip of HDMP-1032/1034, the optical fiber transmits the high-speed optical signals as the transmission media. The signal transmission bandwidth can be up to over 500MHz in use of optical fiber, otherwise the signal transmission quality and environment adaptability has been improved greatly.

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6

Yue, Ya Jie, Xiao Jing Zhang, and Chen Ming Sha. "The Design of Wireless Video Monitoring System Based on FPGA." Advanced Materials Research 981 (July 2014): 612–15. http://dx.doi.org/10.4028/www.scientific.net/amr.981.612.

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The wireless video monitoring system contains the video acquisition device,video transmission device,video storage device and VGA display device.In this paper,we use video acquisition device to collect video siganals in real-time.The analog video signal is transmitted by using wireless technology.The video signal is converted to a digital signal by using the dedicated A/D chip. At the same time ,the YCrCb signals will be converted into RGB signals by the format converting module.Then,the digital RGB signals are converted to analog RGB signals through the D/A,and they are finally displayed on the VGA monitor in real-time.The design mainly uses the wireless transmission technology to transmit analog video signals and uses ADV7181 to decode.The controlling system of FPGA deals with the decoded digital signals which will be transmitted to the D/A and the data finally will display in real time.

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7

Uehara, Michihiro, and Toru Kuroda. "Digital Transmission. Frame Structure of OFDM Signal and Transport Signal Suitable for Hierarchical Transmission." Journal of the Institute of Image Information and Television Engineers 52, no. 11 (1998): 1690–96. http://dx.doi.org/10.3169/itej.52.1690.

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8

Weng, Shao Lin. "Research on Performance Analysis of Digital Baseband Signal Transmission." Applied Mechanics and Materials 437 (October 2013): 829–33. http://dx.doi.org/10.4028/www.scientific.net/amm.437.829.

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Nowadays, in order to improve the quality of signal transmission and reduce the signal attenuation and noise interference, the transmission digital baseband signal modulation become mainstream in today's signal transmission. For the digital baseband signal transmission performance of research helps us to understand the process of digital signal transmission. Firstly, using shift registers to produce m sequence, used to simulate the data signal and the pseudo random noise signal. Then, to design a low pass filter, used to simulate the channel. Data signal transmission in the channel was carried with additive random noise interference, we can measure signal interference by observing eye pattern at the receiving terminal. If to Manchester encoding of data signal, the receiver decoding output data signal can be extracted using the synchronous clock circuit to get the clock signal to synchronize, and display the eye pattern, which is used to evaluate the performance of the transmission system. And we put forward the optimization scheme of the digital baseband signal transmission performance through the research.

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9

Yang, Chongyi, Chanpin Chen, Zhenhao Wu, et al. "Multi-Channel Digital Oscilloscope Implementation over Android Device." Computer and Information Science 12, no. 2 (2019): 58. http://dx.doi.org/10.5539/cis.v12n2p58.

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Signal monitoring and waveform analysis play a significant role in state-of-the-art signal processing and electronic measurement. Traditional oscilloscopes tend to be heavy and huge, which makes it impossible for outdoor signal measurement. In addition, most of those oscilloscopes can measure merely two signals simultaneously. This article proposes the design of multi-channel digital oscilloscope over common Android mobile device. In our system we use STM32 development board to implement up to eight input channels, data processing and wireless transmission. In addition, an Android application is designed for Wi-Fi data reception, respective waveform demonstration and derivation of each signal&rsquo;s amplitude and frequency. In order to transmit up to eight digital signals simultaneously as fast as possible, we designed an algorithm where all signals&rsquo; data can be transmitted within a surprisingly small amount of wireless data. In our system test, wireless data transmission is implemented and each waveform can be recovered and demonstrated basically.

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10

Nakahara, Syunji, Masahiro Okano, Toru Kuroda, Makoto Sasaki, and Youzou Utsumi. "Digital Transmission Techniques that support Digital Broadcasting. Protection of Digital Terrestrial Television Signals Against Analog Signal Interference." Journal of the Institute of Image Information and Television Engineers 53, no. 11 (1999): 1585–91. http://dx.doi.org/10.3169/itej.53.1585.

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11

Luise, M., U. Mengali, M. Moeneclaey, J. G. Proakis, E. Strom, and W. H. Tranter. "Guest editorial - signal synchronization in digital transmission systems." IEEE Journal on Selected Areas in Communications 19, no. 12 (2001): 2293–97. http://dx.doi.org/10.1109/jsac.2001.974596.

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12

Yasuda, Yutaka, Masayoshi Ohashi, Fumiaki Sugaya, and Hideo Okinaka. "Digital signal transmission characteristics in maritime satellite communications." Electronics and Communications in Japan (Part I: Communications) 73, no. 9 (1990): 58–67. http://dx.doi.org/10.1002/ecja.4410730906.

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13

Yan, Hou. "Theoretical Model of Signal Transmission Based on Digital Radio Receiver." Open Electrical & Electronic Engineering Journal 8, no. 1 (2014): 705–8. http://dx.doi.org/10.2174/1874129001408010705.

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Radio receiver, as an extensively feasible modern technology, has been widely applied in all fields of military and civil. It is mainly to demodulate all kinds of required signals with strong interference and noise. Based on intermediate frequency (IF) software radio receiver test platform, the data transmission approach combining direct memory access (DMA) and multichannel buffered serial port (McBSP) was studied and the parallel operation of data transmission and data processing was realized. The method proposed for signal transmission and processing shows strong universality and can be used in other relevant fields.

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14

Unbehauen, R. "IIR digital filters with equiripple stopband transmission." IEEE Transactions on Acoustics, Speech, and Signal Processing 33, no. 4 (1985): 1047–49. http://dx.doi.org/10.1109/tassp.1985.1164629.

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15

Yen, Chih Ta, and Chia Yu Liu. "Hybrid Analog/Digital Modulations Using Polarization Multiplexing OCDMA Scheme in Free Space Optics." Applied Mechanics and Materials 764-765 (May 2015): 511–14. http://dx.doi.org/10.4028/www.scientific.net/amm.764-765.511.

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With the development of the Internet, how to provide a high-speed and high-security comprehensive network has become urgent issue. In this project, we propose hybrid analog/digital transmissions format scheme which integrated optical code-division multiple-access (OCDMA) and polarization multiplexing technique in free space optics (FSO) transmission. Orthogonal frequency division multiplexing (OFDM) transmits as the analog format and (on-off keying) OOK transmits as digital format in the study, respectively. In the proposed hybrid OCDMA system, it has high-speed transmission, signal security and low cost...etc. we adopt quasi-orthogonal Walsh-Hadamard codes (WHC) that with fixed cross correlation value as the codeword for each base station. With the property, the multiple access interference (MAI) can be efficiently eliminated by using the balanced detection scheme at the receive end. The constellation and eye diagrams show that both OFDM signal as analog signal and OOK modulation as digital signal in the proposed hybrid OCDMA system perform good performance in FSO transmission.

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16

MURALI, K. "SYNCHRONIZATION BASED SIGNAL TRANSMISSION WITH HETEROGENEOUS CHAOTIC SYSTEMS." International Journal of Bifurcation and Chaos 10, no. 11 (2000): 2489–97. http://dx.doi.org/10.1142/s0218127400001729.

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By considering cascaded heterogeneous chaotic systems with drive-response configurations, information signal is encoded in the first chaotic system of the drive-module. A small amplitude chaotic signal from this first system is used as new information signal to the second different chaotic system within the drive-module. The chaotic signal from the second system of the drive-module is now transmitted to the response-module. An appropriate feedback loop is constructed in the response-module to achieve synchronization among the variables of the drive- and response-modules. We apply this approach to transmit analog and digital information signals in which the quality of the recovered signal is higher and the encoding is potentially secure.

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17

Kim, Do-Hoon, and Kyu-Sung Hwang. "Development and Verification of Digital EEG Signal Transmission Protocol." Journal of Korea Information and Communications Society 38C, no. 7 (2013): 623–29. http://dx.doi.org/10.7840/kics.2013.38c.7.623.

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18

Pan, Zhongqi, Junyi Wang, and Yi Weng. "Digital signal processing techniques in Nyquist-WDM transmission systems." Photonic Network Communications 32, no. 2 (2016): 236–45. http://dx.doi.org/10.1007/s11107-015-0598-8.

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19

Hu, Ling-na, Ling-ge Jiang, Chen He, and Feng Yang. "Watermark in the digital video broadcasting handheld transmission signal." Journal of Shanghai Jiaotong University (Science) 14, no. 2 (2009): 149–53. http://dx.doi.org/10.1007/s12204-009-0149-5.

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20

Jiménez Hernández, Francisco, and Alejandro Dueñas Jiménez. "Validating Some Signal Integrity Procedures for Transmission of Digital Signals on Microstrip Circuits." Universal Journal of Electrical and Electronic Engineering 2, no. 6 (2014): 254–57. http://dx.doi.org/10.13189/ujeee.2014.020603.

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21

Zhang, Hong, Xinxin Lu, and Xiuye Yin. "Reverse Synchronous Transmission of Electrical Signals Based on Parallel Injection and Series Pickup." Traitement du Signal 37, no. 4 (2020): 655–60. http://dx.doi.org/10.18280/ts.370415.

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To eliminate the interference with the transmission of electrical signals, this paper puts forward a reverse synchronous transmission (RST) control method based on parallel injection and series pickup. Firstly, the synchronous transmission mechanism of electrical signals was analyzed, followed by the design of the framework and workflow of signal transmission. Next, an RST channel model was established for electrical signals, and the transmission parameters were configured based on the transmission properties of these signals. Through alternative current (AC) impedance analysis, the Laplace transform was performed on the transmission loop to increase the voltage of the transmission channel, and to elevate the signal-to-noise ratio (SNR) of the voltage across the resistor. Finally, the voltage comparator was adopted to obtain the digital information of the baseband signal, and the power signal was transmitted to the RST channel, completing the RST control of electrical signals. The experimental results show that the transmission speed of the system was 0.7488, and the reverse transmission of electrical signals was only delayed by 5ms, when the intensity of electromagnetic radiation was 2.0μT. Through parallel injection and series pickup, the proposed system can effectively realize the RST of electrical signals, without changing the topology of the transmission system.

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22

Yamamoto, Yutaka, Kaoru Yamamoto, Masaaki Nagahara, and Pramod P. Khargonekar. "Signal processing via sampled-data control theory." Impact 2020, no. 2 (2020): 6–8. http://dx.doi.org/10.21820/23987073.2020.2.6.

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Digital sounds and images are used everywhere today, and they are all generated originally by analogue signals. On the other hand, in digital signal processing, the storage or transmission of digital data, such as music, videos or image files, necessitates converting such analogue signals into digital signals via sampling. When these data are sampled, the values from the discrete, sampled points are kept while the information between the sampled points is lost. Various techniques have been developed over the years to recover this lost data, but the results remain incomplete. Professor Yutaka Yamamoto's research is focused on improving how we can recover or reconstruct the original analogue data.

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23

Shumskaya, O. O., and A. О. Iskhakova. "Digital Watermarks with Adaptive Information Ring Width in the Issue of Hidden Transmission of a Control Signal in the Multi-Target Robotic System." Proceedings of the Southwest State University 24, no. 2 (2020): 136–52. http://dx.doi.org/10.21869/2223-1560-2020-24-2-136-152.

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Purpose of research. The article is devoted to the issue of ensuring the safe transmission of control signals between the elements of a multi-agent robotic system. The purpose of the work is to provide hidden data transmission with the possibility of unambiguous extraction of control signals.Methods. To solve the task set, an algorithm based on the methods of digital watermarks and digital steganography was proposed. The method of forming a digital watermark in the form of a ring with symmetry allows not only ensuring maximum imperceptibility of embedding (insignificant distortion of the container during concealment), but also to protect the transmitted signal from such complex distortions as image rotation. The steganographic concealment method allows regulating the intensity of embedding using the force factor; it is computationally simple and straightforward. The proposed approach to identifying and understanding the transmitted signal differs from modern methods of cryptography and steganalysis in that it does not require 100% correct signal extraction. After several modifications, the method allows minimizing the time spent on formation (adaptive width of the ring with signal bits) and embedding of a digital watermark (minimization of the processed area of the container for embedding).Results. The proposed approach makes it possible to transmit control signals in a hidden way within the framework of the transmission of digital objects; the conducted experiments have shown that the control signal is unambiguously understood even with such distortions as a decrease or increase in contrast or brightness, image rotation, and compression.Conclusion. Application of the proposed technique for transmitting control signals in a multi-agent robotic system will male it possible to receive the necessary information timely and safe, with a minimum probability of loss.

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24

Amreev, M., R. Safin, T. Pavlova, E. Temyrkanova, and Y. Garmashova. "AMPLIFIER DESIGN FOR MODELING THE TRANSMISSION OF A DIGITAL VIDEO SIGNAL OVER A DATA TRANSMISSION CHANNEL." Series of Geology and Technical Sciences 445, no. 1 (2021): 39–45. http://dx.doi.org/10.32014/2021.2518-170x.6.

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The use of video surveillance systems is used in the areas of security, law and order, in the territories of protected objects, in monitoring the movement of road vehicles and in other areas. The main disadvantage of a video surveillance system is its susceptibility to weather influences (rain, fog, snowfall, etc.), which degrades the quality of the video system by reducing the signal level. Therefore, the urgency of finding new ways and possibilities to improve the quality of video signals is one of the priority areas of signal processing. The main task of this work was to determine the main parameters, simulate the transmission line and amplifier, and select the schematic diagram of the transmitting and receiving path with the voltage and current ratings. Both the receiver and the cable video transmitter have different means of adjusting to different transmission line lengths. The signal at the output of each receiver should be in the range from 0.9 to 1.1 V, and the spread of the total ohmic resistance of the wires of the video transmission line at the input of the receiver should be no more than 2 – 3%. Based on these parameters, the equipment is configured for transmitting video over the channel. The magnitude of the mismatch is regulated by potentiometers, which allow smooth adjustment of the video transmission equipment [1]. As a rule, video transmission over the channel is carried out at a distance of 50 to 1500 m. If it is necessary to transmit video at distances less than 50 m, additional resistances are connected in series at the receiver input so that the total line resistance is 30 - 50 Ohm [1].

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25

Chen, Yun Jun, Xiu Ming Jiang, Gong Yuan Yang, and Yan Cai. "Design and Implementation of Real-Time Audio Transmission System." Advanced Materials Research 433-440 (January 2012): 2887–91. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.2887.

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Continuous Multi-channel digital audio signals system not only guarantees the continuity of signal acquisition, but has the real-time control ability in the process of signal acquisition. This paper proposes the producer/consumer design pattern which can make program designing quicker, simpler and more efficient. Through the example of continuous sound signal acquisition, the designing idea for the Producer/consumer design pattern is described in details and the design process of this program on the Delphi platform is given. The result shows that the introduction of the producer/consumer design pattern in the use of program design which has serious request in real-time and continuous sound signal acquisition and playing can make the processes response faster and more efficient．

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26

Lee, Sang-Woon, Young-Su Kim, and Jeong-Song Yun. "Transmission Signal Normalization Scheme for Advanced Terrestrial Digital Multimedia Broadcasting." Journal of Broadcast Engineering 15, no. 6 (2010): 868–75. http://dx.doi.org/10.5909/jbe.2010.15.6.868.

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27

Lee, Yourack, Min-Kyu Joo, Viet Thong Le, et al. "Ultrastretchable Analog/Digital Signal Transmission Line with Carbon Nanotube Sheets." ACS Applied Materials & Interfaces 9, no. 31 (2017): 26286–92. http://dx.doi.org/10.1021/acsami.7b04406.

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28

Nohara, T. J., A. Premji, and W. R. Seed. "A new signal quality degradation monitor for digital transmission channels." IEEE Transactions on Communications 43, no. 2/3/4 (1995): 1333–36. http://dx.doi.org/10.1109/26.380181.

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29

Burrascano, P., M. D'Amore, S. Cristina, and M. Salerno. "Digital Signal Transmission on Power Line Carrier Channels: An Introduction." IEEE Power Engineering Review PER-7, no. 1 (1987): 35. http://dx.doi.org/10.1109/mper.1987.5527300.

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30

Sato, K., S. Aoyagi, and T. Kitami. "Fiber Optic Analog--Digital Hybrid Signal Transmission Employing Frequency Modulation." IEEE Transactions on Communications 33, no. 5 (1985): 433–41. http://dx.doi.org/10.1109/tcom.1985.1096326.

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31

Burrascano, P., S. Cristina, M. D'Amore, and M. Salerno. "Digital Signal Transmission on Power Line Carrier Channels: An Introduction." IEEE Transactions on Power Delivery 2, no. 1 (1987): 50–56. http://dx.doi.org/10.1109/tpwrd.1987.4308072.

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32

Moreira, P. M. R. S., I. Z. Darwazeh, and J. J. O'Reilly. "Distributed amplifier signal shaping strategy for multigigabit digital optical transmission." Electronics Letters 29, no. 8 (1993): 655. http://dx.doi.org/10.1049/el:19930439.

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33

Schamel, Günter. "Adaptive signal processing for digital HDTV 280 Mbit/s transmission." Signal Processing 15, no. 3 (1988): 335–50. http://dx.doi.org/10.1016/0165-1684(88)90022-9.

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34

Zhang, Xiao, Jie Song, and Hao Ding. "Simple Transmission Performance Analysis System of Digital Signal Using FPGA." Advanced Materials Research 588-589 (November 2012): 794–97. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.794.

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This article has designed a digital signal transmission performance analysis system using FPGA. It uses FPGA to generate the m-sequence whose frequency can be adjusted step by step and it uses Manchester encoding. Through the transmission channel, a fast bit synchronization detection arithmetic is used to abstract bit synchronization clock by FPGA. The oscilloscope can use the bit synchronization clock to observe eye diagram and other information. The system has the advantages of good transplant, small size, low-power consumption and high reliability.

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35

PALANIYANDI, P., and M. LAKSHMANAN. "CONTROLLED PARAMETER MODULATIONS IN SECURE DIGITAL SIGNAL TRANSMISSIONS." International Journal of Bifurcation and Chaos 17, no. 11 (2007): 4187–94. http://dx.doi.org/10.1142/s021812740701972x.

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We propose a simple method for secure digital signal transmission by making some modifications in the single-step parameter modulation technique propo sed earlier to overcome certain inherent deficiencies. In the modified method, the parameter modulation is effectively regulated or controlled by the chaotic signal obtained from the transmitting chaotic system so that it has the maximum security. Then, the same idea is also extended to the multistep parameter modulation technique. It is found that both the methods are secure against ciphertext (return map) and plaintex attacks. We have illustrated these methods by means of the Lorenz system.

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36

Bing, Sun, Ruan Huai-lin, and Zhong Hua i. "Non-causal Digital Cancellation in Simultaneous Transmission and Reception Technology." MATEC Web of Conferences 173 (2018): 03061. http://dx.doi.org/10.1051/matecconf/201817303061.

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The electronic system occasionally requires the simultaneous transmission and reception of signals in the same platform. In the circumstance of simultaneous transmission and reception, the strong coupling interference signal cancellation requires shorter data and better cancellation effectiveness, but the cancellation performance of general causal canceller is relatively poor. Motivated by this, adopting non-causal filter to realize digital cancellation is then proposed in the paper. The model of non-causal filter digital cancellation is built at first, and the digital cancellation is simulated and analysed. The simulation results demonstrate that the digital cancellation has outstanding characteristics, and at the same time, the results also indicate that in the circumstance of the same filter order, the non-causal filter digital cancellation has better cancellation effectiveness.

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37

Petrovic, Mile, Dragoljub Martinovic, and Dragana Krstic. "Bit error probability of PSK systems in the presence of impulse noise." Facta universitatis - series: Electronics and Energetics 19, no. 1 (2006): 27–37. http://dx.doi.org/10.2298/fuee0601027p.

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In this paper the phase error probability density function in the digital systems for the digital phase modulated signals transmission is derived. The circuit for the referent carrier extraction consists of phase locked loop. The referent carrier extraction is not ideal. The pulse interferences narrow-band Gaussian noise and different interferences are present with useful signal at the input of the receiver. The error probability of the digital system for the phase modulated signal demodulation is also calculated in the paper.

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38

Zhao, Jian Rui, Ning Liu, and Yu Hua Wu. "Design of Digital Communication System of XCTD Based on FSK." Applied Mechanics and Materials 644-650 (September 2014): 3972–75. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.3972.

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According to the problem of expendable conductivity temperature depth profile (XCTD) of transmission signal waveform distortion and undistinguishable information caused by cable time-varying parameters and influence of seawater. This paper designed a based on FSK (Frequency shift keying) of digital communication system. It used single-chip modem chip FX604 used in FSK modulation and demodulation of the signal. And it implements the digital signal transmission on thin wire communication on the water. The system overcomes unfavorable conditions about transmission channel and marine environment. The circuit is easy and practical.

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39

Geng, Qi, Yinghong Wen, Dan Zhang, Jianjun Xiao, Yun Zhu, and Linfu Zhu. "Analysis of Electromagnetic Coupling Characteristics of Balise Transmission System Based on Digital Twin." Applied Sciences 11, no. 13 (2021): 6002. http://dx.doi.org/10.3390/app11136002.

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The balise transmission system (BTS) is an automatic identification system for vehicle–ground communication based on radio frequency identification (RFID) technology. The electromagnetic coupling characteristics of BTS have a very important effect on the transmission quality of the uplink telegram signals. However, signal transmission problems of BTS often occur due to unreasonable installation mode or parameter setting. In order to solve these problems, it is necessary to fully discuss the electromagnetic coupling characteristics of the BTS. In this paper, the transmission process of energy and data between the onboard antenna unit and the balise was analyzed using digital twin technology. A high-precision dynamic electromagnetic coupling model of the BTS was established from four aspects of three-dimensional structure, physical properties, behavior patterns, and rule restrictions. Then the accuracy of the model was verified by experiments. Finally, the influence of typical parameters on the uplink signal is calculated and analyzed quantitatively. The results showed that compared with other factors discussed in this paper, the vertical distance and the installation mode had greater effects on the uplink signal. These results can be used to guide the engineering installation and related optimization of the BTS.

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40

Hyung Kim, Chang, Seong Jeong, Kyoung Hak Lee, and Chae Bong Sohn. "DTV broadcasting failover switching system using PCR information." International Journal of Engineering & Technology 7, no. 2.12 (2018): 101. http://dx.doi.org/10.14419/ijet.v7i2.12.11101.

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Background/Objectives: Major Terrestrial broadcasters, MSO (Multi-System Operator), IPTV (Internet Protocol Television) Operators have been putting effort to prevent the transmission stops such as transmission interruption.Methods/Statistical analysis: The main and spare signals of the digital broadcasting are monitored. If a problem occurs in the main signal, it automatically switched to a preliminary signal, preventing a broadcast accident before a failover switch is performed.In this paper, we propose a method that can automatically switch signal to minimize the resulting impacts on a broadcasting accident caused by a disconnection from the input or an accident from the network. Digital broadcasts transmission abides by MPEG-2 (Moving Picture Expert Group) TS (Transport Stream) standardization.Findings: This paper proposes a method to maintain the quality of broadcast such as transmission interruption within ETSI TR 101 290 (European Telecommunications Standards Institute Technical Report) standardization. Furthermore, with this proposed method, it would be possible to minimize the error from an automatically transferred stream that sent from the emergency link within ETSI TR 101 290 standardization.Improvements/Applications: A method for preventing broadcast transmission accidents

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Yuminaka, Yasushi. "High-Speed Data Transmission Techniques Using Raised Cosine Signaling." Key Engineering Materials 459 (December 2010): 252–59. http://dx.doi.org/10.4028/www.scientific.net/kem.459.252.

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In this paper, we propose new pulse-shaping techniques using raised cosine signaling instead of using conventional digital signals (rectangular waves), to reduce Inter-symbol interference (ISI) and crosstalk noise. Unlike a rectangular pulse, the raised cosine pulse takes on the shape of a sinc pulse that minimizes ISI. Also, limited bandwidth of the signal can reduce crosstalk noise. We show the simulation and experimental results of the raised cosine signaling scheme to show the new signaling method plays a critical part in maintaining signal integrity in high-speed VLSI systems.

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Leśnikowski, Jacek. "Research on Poppers Used as Electrical Connectors in High Speed Textile Transmission Lines." Autex Research Journal 16, no. 4 (2016): 228–35. http://dx.doi.org/10.1515/aut-2016-0025.

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Abstract This paper presents results of research on poppers used as electrical connectors connecting fragments of textile signal lines. These lines can be used in intelligent clothing for connecting electronic modules implemented in it. Intelligent (smart) clothing can be used, among others, in the health monitoring of the elderly, newborn babies, or people working in hazardous conditions, for example, firefighters and soldiers. The aim of the present study was to examine the usefulness of poppers, widely used in clothing, as electrical connectors connecting parts of the textile signal lines designed for transmission of high-speed digital signals. The paper presents examples of measured parameters characterizing transmission properties of two fragments of the coplanar, textile transmission line connected to each other using conventional poppers. The presented measurement results contain the so-called s parameters, characteristic impedance of the poppers, and eye measurements characterizing distortions of digital signals passing through the tested line. In the article, the effect of temperature and humidity of air surrounding the tested poppers on their characteristic impedance was also presented. This property and its stability are important in signal lines designed for high-speed data transmission.

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Palmer, Duncan, Terry Moore, Chris Hill, Marcus Andreotti, and David Park. "Radio Positioning using the Digital Audio Broadcasting (DAB) Signal." Journal of Navigation 64, no. 1 (2010): 45–59. http://dx.doi.org/10.1017/s037346331000041x.

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Over the recent decades, there have been a number of trends that have driven the desire to improve the ability to position and navigate in all environments. While GPS has been the driving factor behind most of these trends, there are limitations to GPS that have become more evident over time as the World has increasingly come to rely on location. These limitations are mostly due to the low transmission power of GPS satellites, where navigation signals broadcast from space are comparatively weak, especially by the time they have travelled to receivers on the ground. This makes the signals particularly vulnerable to fading in difficult environments such as built-up urban areas. The low signal-to-noise ratio (SNR) also means that the signals are susceptible to jamming, both hostile and accidental.This motivates the need for non-GPS (or, more generally, non-GNSS) navigation technologies, for example, terrestrial based alternatives to GNSS such as eLoran. But, there is also significant interest in the exploitation of other non-navigation signals for positioning and navigation purposes. These so-called ‘Signals of Opportunity’ (SoOP) do not generally require any alterations to existing communications transmission infrastructure and often use alternative multi-carrier modulation techniques to those methods used by most GNSS services. The major challenge of using a SoOP for location purposes is that the transmitter network infrastructure has not generally been designed with positioning as a requirement.An ongoing project, at the Institute of Engineering Surveying and Space Geodesy (IESSG) of the University of Nottingham, is directed towards an investigation of the potential of the Digital Audio Broadcast (DAB) signal for positioning purposes. A prototype Software Defined Radio (SDR) DAB positioning receiver has been developed and has now been tested. This paper presents a detailed review of the structure of the DAB signals and explains how these signals can be used as the basis of a positioning system. In addition the development of the prototype SDR receiver and the initial results are presented and discussed.

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Chen, Shuo, Jun Lei Song, Zi Min Yuan, Yang Liu, and Pei Pei Guo. "Diver Communication System Based on Underwater Optical Communication." Applied Mechanics and Materials 621 (August 2014): 259–63. http://dx.doi.org/10.4028/www.scientific.net/amm.621.259.

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The underwater diver visible light communication system integrating information collection, transmission and processing achieves the optical communication device established for the diver’s underwater wireless transmission and underwater sensor network. The front-end signal acquisition module capable of carrying out voice and image acquisition utilizes a MEMS digital microphone and a high performance CMOS camera to change optical signals in to digital ones. The signal source applies wavelet conversion and the channel coding and decoding apply Turbo algorithms, channel modulation and demodulation adopt PPM modulation, so compression, coding and modulation are mounted on TI's high-performance DSP TMS320DM642 platform to ensure the stability and reliability of data transmission. Back-end data acquisition module utilizes a photomultiplier tube and its peripheral circuits for receiving and converting optical signals. Display and storage modules are TFT and SD cards to achieve data reception and sound and light reduction and storage functions.

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Chen, Aiyong. "Digital Filtering Technology in Industrial Measuring and Control System." Electronics Science Technology and Application 2 (December 3, 2015): 42. http://dx.doi.org/10.18686/esta.v2i1.8.

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<p>This article aims at the technical problems in modernized industrial measuring and control system such as interruption signal, noise signal and other useless signal. First introduces the features and importance of digital filtering technology and then elaborates on the realization methods of digital filtering and frequently used digital filtering calculation methods in the industrial measuring system. The research reveals that integrated usage of numerous methods or even complex digital filtering technology is adopted to calculate and treat such digital signals like random interruption, heat noise, system noise, measuring error and zero-point offset and thus meet the system requirements. The digital filtering technology is widely applied in the processing of HD signal, such as digital audio, radar, image processing, data transmission and biological and medical fields and pledges to provide strong assurance for the real-time, stable and reliable properties of modernized industrial measuring and control system.</p><div> </div><div> </div>

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Ou, Jianping, Jun Zhang, and Ronghui Zhan. "Processing Technology Based on Radar Signal Design and Classification." International Journal of Aerospace Engineering 2020 (January 17, 2020): 1–19. http://dx.doi.org/10.1155/2020/4673763.

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It is well known that the application of radar is becoming more and more popular with the development of the signal technology progress. This paper lists the current radar signal research, the technical progress achieved, and the existing limitations. According to radar signal respective characteristics, the design and classification of the radar signal are introduced to reflect signal’s differences and advantages. The multidisciplinary processing technology of the radar signal is classified and compared in details referring to adaptive radar signal process, pulse signal management, digital filtering signal mode, and Doppler method. The transmission process of radar signal is summarized, including the transmission steps of radar signal, the factors affecting radar signal transmission, and radar information screening. The design method of radar signal and the corresponding signal characteristics are compared in terms of performance improvement. Radar signal classification method and related influencing factors are also contrasted and narrated. Radar signal processing technology is described in detail including multidisciplinary technology synthesis. Adaptive radar signal process, pulse compression management, and digital filtering Doppler method are very effective technical means, which has its own unique advantages. At last, the future research trends and challenges of technologies of the radar signals are proposed. The conclusions obtained are beneficial to promote the further promotion applications both in theory and practice. The study work of this paper will be useful for choosing more reasonable radar signal processing technology methods.

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Zhang, Yang. "Construction of Cable Digital TV Head-End." Advanced Materials Research 933 (May 2014): 682–86. http://dx.doi.org/10.4028/www.scientific.net/amr.933.682.

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The basic structure of Cable Digital TV Head-end System is presented in this paper. Cable Digital TV Head-end connected between the TV Signal Source and the Transmission Line is a system which can convert a variety of signal sources into a transport stream to meet the exacting standards of the transmission. The transport streams will finally be sent to service terminal by the transmitting device and the existing network. This paper gives the method of constructing Cable Digital TV Head-end System and some useful suggestions about the selection of equipment.

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Wu, Guo Cheng, Zhan Xin Yang, and Wei Zhang Xu. "A Terrestrial Digital Broadcasting and Positioning System Based on Overlap Communication." Applied Mechanics and Materials 568-570 (June 2014): 1282–86. http://dx.doi.org/10.4028/www.scientific.net/amm.568-570.1282.

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Inspired by the overlap communication theory, a new onshore radio positioning system which superimposed on terrestrial digital transmission system is proposed in this paper. This system overlaps but not affects existing terrestrial digital broadcasting.At the receiver, a reconstruction/cancellation algorithm.is implied to capture the navigation signal and positioning measurements precisely.This paper focus on the construction of overlap system,spreading navigation signal and the capture of positioning measurements.We give a method to generate spreading navigation signal and overlap with terrestrial digital transmission system.The method can reduce the performance degradation due to pilot interference. We also proposes a reconstruction/cancellation algorithm which can solution the capture performance deterioration caused by overlapped system . The simulation results show that this system proposed in this paper can be used in terrestrial digital transmission system and provide good positional function.

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LIN, ROBERT, REN-GUEY LEE, CHWAN-LU TSENG, YAN-FA WU, and JOE-AIR JIANG. "DESIGN AND IMPLEMENTATION OF WIRELESS MULTI-CHANNEL EEG RECORDING SYSTEM AND STUDY OF EEG CLUSTERING METHOD." Biomedical Engineering: Applications, Basis and Communications 18, no. 06 (2006): 276–83. http://dx.doi.org/10.4015/s1016237206000427.

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A multi-channel wireless EEG (electroencephalogram) acquisition and recording system is developed in this work. The system includes an EEG sensing and transmission unit and a digital processing circuit. The former is composed of pre-amplifiers, filters, and gain amplifiers. The kernel of the later digital processing circuit is a micro-controller unit (MCU, TI-MSP430), which is utilized to convert the EEG signals into digital signals and fulfill the digital filtering. By means of Bluetooth communication module, the digitized signals are sent to the back-end such as PC or PDA. Thus, the patient's EEG signal can be observed and stored without any long cables such that the analogue distortion caused by long distance transmission can be reduced significantly. Furthermore, an integrated classification method, consisting of non-linear energy operator (NLEO), autoregressive (AR) model, and bisecting k-means algorithm, is also proposed to perform EEG off-line clustering at the back-end. First, the NLEO algorithm is utilized to divide the EEG signals into many small signal segments according to the features of the amplitude and frequency of EEG signals. The AR model is then applied to extract two characteristic values, i.e., frequency and amplitude (peak to peak value), of each segment and to form characteristic matrix for each segment of EEG signal. Finally, the improved modified k-means algorithm is utilized to assort similar EEG segments into better data classification, which allows accessing the long-term EEG signals more quickly.

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Volodin, A. D., A. L. Efimenko, A. V. Gorlin, and D. A. Kuzmin. "Signal Synchronization, Collection and Transmission for Multichannel Distribution Seismic Antenna." Journal of the Russian Universities. Radioelectronics, no. 1 (April 17, 2018): 25–31. http://dx.doi.org/10.32603/1993-8985-2018-21-1-25-31.

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Creation of seismic antennas involves production of a system capable to provide synchronous analog-to- digital data signal conversion of all channels and to broadcast digitized signals to the central computing complex (CCC). The article considers a structure of data transmission system from a big number of sources for application in seismic antennas. Moreover, it provides possible ways of preprocessing equipment (PE) unit arrangement in separate hermetic blocks to facilitate their replacement. Besides, the options for PE unit structural and functional schemes are offered. Application of specific chips is explained. The review of the most widespread types of digital convertors is given and the optimal one is chosen for application in hydro acoustic complexes. The option of synchronization with the use of phase-locked loop PLL units is offered. Configuration of data transmission system with the use of Ethernet switchboard setting optimal data transmission protocol is considered.

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