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Journal articles on the topic 'Pn_ sequence (pseudo-noise sequence)'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Kadhim, Hassan Kaittan, and Jasim Mohammed Samir. "Implementing and designing a secure information system based on the DSSS gold sequence using MATLAB." Bulletin of Electrical Engineering and Informatics 10, no. 3 (2021): pp. 1455~1463. https://doi.org/10.11591/eei.v10i3.2446.

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During study of directly spread spectrum systems, noted that this system uses many types of code to spread data through communication process. There are different types of code sequences available with good correlation properties, they often use pesudo sequence for spreading which is to be less efficient in protecting information from the breaches that attack the communications systems from penetration. In this article gold sequence will use, which is consider better and more complex than the rest of the code sequence (pseudo-noise (PN) sequence, barker code, hadamard code, and others) in term

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2

Shivanand, Pujar, W.M Kangana, Kurthkoti Chitrashree, P. Mangaokar Abhinandan, and S. Jakati Jagadish. "Advanced Watermarking of Digital Images Showing Robust, Semi-Fragile and Fragile Behaviour." International Journal of Recent Technology and Engineering (IJRTE) 10, no. 4 (2021): 196–212. https://doi.org/10.35940/ijrte.D6612.1110421.

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Digital Image Watermarking plays an important role when it comes to maintaining digital color picture authentication information. The proposed paper consists mainly of a digital watermarking scheme consisting of discrete wavelet transformation and involving the generation of pn sequence number to embed the watermark and also to extract the watermark from the host image. The technique suggested includes both embedding the watermark and removing it from the host file. Both the method of embedding and extraction consists of generating the pn sequence number values using the random numbers. The te

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3

Massey, James L., Giovanni Boscagli, and Enrico Vassallo. "Regenerative pseudo-noise-like (PNL) ranging sequences for deep-space missions." International Journal of Satellite Communications and Networking 25, no. 3 (2007): 305–22. http://dx.doi.org/10.1002/sat.876.

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4

Zeng, Xuezhi, Albert Monteith, Andreas Fhager, Mikael Persson, and Herbert Zirath. "Noise performance comparison between two different types of time-domain systems for microwave detection." International Journal of Microwave and Wireless Technologies 9, no. 3 (2016): 535–42. http://dx.doi.org/10.1017/s175907871600057x.

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This paper compares the noise performance of two different types of time-domain microwave detection systems: a pulsed system and a pseudo-random noise sequence system. System-level simulations and laboratory-based measurements are carried out in the study. Results show that the effect of timing jitter is more significant on the measurement accuracy of the pseudo-random noise sequence system than that of the pulsed system. Although the signal power density of the pseudo-random sequence system is tens of dBs higher than that of the pulsed system over the frequency band of interest, the signal-to

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5

Wang, Yan Chun, and Chang Wei Sun. "The Application of Pseudo-Random Sequence in the Properties Measurement of Polymer Optical Fiber." Applied Mechanics and Materials 313-314 (March 2013): 653–57. http://dx.doi.org/10.4028/www.scientific.net/amm.313-314.653.

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A new method for the properties measurement of polymer optical fiber (POF) using pseudo-random sequence is introduced. The light source modulated by pseudo-random sequence is injected into the POF. The output optical signal after photoelectric conversion is made the correlation detection with pseudo-random sequence, and finally the correlation operation is carried out based on Labview software. Because pseudo-random sequence performs well on randomicity and it has the correlation properties similar to that of white noise, interference and noise have little influence on the peak of correlation

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6

Lazaryev, D. V., and T. A. Tereshchenko. "A fast synchronization algorithm in communication systems with spectrum expansion." Electronics and Communications 15, no. 3 (2010): 190–93. https://doi.org/10.20535/2312-1807.2010.15.3.306655.

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The fast algorithm of synchronization using 2m points fast convolution for communication systems with direct sequence spread spectrum by 2m-1 points pseudo noise sequence has been proposed. The types and lengths of pseudo noise sequences suitable for usage with proposed algorithm are determined. There were made estimates of correlation errors and computational complexity.

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7

Sasakura, Toyoki. "New generation pinger using pseudo noise sequence signal." Journal of the Acoustical Society of America 131, no. 4 (2012): 3521. http://dx.doi.org/10.1121/1.4709321.

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8

Liang, Jie, Rong Jiang Tang, Yin Han Gao, Tong Hang Zhao, Wen Jun Jiang, and Bing Wu Lu. "Identification Method of Vehicle Interior Airborne Noise Based on Pseudo-Random." Advanced Materials Research 338 (September 2011): 460–66. http://dx.doi.org/10.4028/www.scientific.net/amr.338.460.

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According to the source-path-receiver model of vehicle interior airborne noise, the correlative identification method of transfer function was proposed. Simulation results demonstrate that the method has excellent noise immunity performance. A m sequence generator whose shift clock frequency is adjustable and register series is optional was designed by complex programmable logic device CPLD and external circuit. The m sequence pseudo-random signal which was amplified by audio power amplifier drives the loudspeaker as sound source signal. The field tests indicate that compare with broadband whi

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9

Song, Xijin, Xuelong Wang, Zhao Dong, Xiaojiao Zhao, and Xudong Feng. "Analysis of Pseudo-Random Sequence Correlation Identification Parameters and Anti-Noise Performance." Energies 11, no. 10 (2018): 2586. http://dx.doi.org/10.3390/en11102586.

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Using a pseudo-random sequence to encode the transmitted waveform can significantly improve the working efficiency and depth of detection of electromagnetic exploration. The selection of parameters of pseudo-random sequence plays an important role in correlation identification and noise suppression. A discrete cycle correlation identification method for extracting the earth impulse response is proposed. It can suppress the distortion in the early stage of the excitation field and the glitches of the cross correlation function by traditional method. This effectively improves the accuracy of cor

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10

Shen, Bin, and Jian‐xin Wang. "Chip rate and pseudo‐noise sequence estimation for direct sequence spread spectrum signals." IET Signal Processing 11, no. 6 (2017): 727–33. http://dx.doi.org/10.1049/iet-spr.2016.0687.

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11

Deng, Zhong Liang, Xie Yuan, and Yu Zhang. "A Simplified Detection Method for PN Sequence Acquisition and its Performance Analysis." Advanced Materials Research 680 (April 2013): 460–65. http://dx.doi.org/10.4028/www.scientific.net/amr.680.460.

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Some OFDM signal systems use PN (Pseudo-noise) sequence in time domain to synchronize. During the acquisition progress, the ground noise power has to be calculated, and the determination of the detection threshold is important. This paper introduced a simplified detection method for PN sequence, and analyzed the threshold to optimize the performance.

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12

Ali, Hadeer Hussein, Hadi T. Ziboon, and Ashwaq Q. Hameed. "Implementation and performance evaluation of multi level pseudo random sequence generator." Bulletin of Electrical Engineering and Informatics 12, no. 2 (2023): 822–34. http://dx.doi.org/10.11591/eei.v12i2.3363.

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In this paper, introduce a proposed multi-level pseudo-random sequence generator (MLPN). Characterized by its flexibility in changing generated pseudo noise (PN) sequence according to a key between transmitter and receiver. Also, introduce derive of the mathematical model for the MLPN generator. This method is called multi-level because it uses more than PN sequence arranged as levels to generation the pseudo-random sequence. This work introduces a graphical method describe the data processing through MLPN generation. This MLPN sequence can be changed according to changing the key between tran

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13

Hadeer, Hussein Ali, T. Ziboon Hadi, and Q. Hameed Ashwaq. "Implementation and performance evaluation of multi level pseudo random sequence generator." Bulletin of Electrical Engineering and Informatics 12, no. 2 (2023): 822~834. https://doi.org/10.11591/eei.v12i2.3363.

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In this paper, introduce a proposed multi-level pseudo-random sequence generator (MLPN). Characterized by its flexibility in changing generated pseudo noise (PN) sequence according to a key between transmitter and receiver. Also, introduce derive of the mathematical model for the MLPN generator. This method is called multi-level because it uses more than PN sequence arranged as levels to generation the pseudo-random sequence. This work introduces a graphical method describe the data processing through MLPN generation. This MLPN sequence can be changed according to changing the key between tran

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14

Md.Alamgir, Hossain, Shariful Islam Md., and Sadek Ali Md. "PERFORMANCE ANALYSIS OF BARKER CODE BASED ON THEIR CORRELATION PROPERTY IN MULTIUSER ENVIRONMENT." International Journal of Information Sciences and Techniques (IJIST) 2, no. 1 (2012): 27–39. https://doi.org/10.5281/zenodo.8412588.

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Spread-spectrum communication, with its inherent interference attenuation capability, has over the years become an increasingly popular technique for use in many different systems. They have very beneficial and tempting features, like Antijam, Security, and Multiple accesses. This thesis basically deals with the pseudo codes used in spread spectrum communication system. The cross-correlation and auto-correlation properties of the long Barker Code are analyzed. It has been seen that the length of the code, autocorrelation and cross-correlation properties can help us to determine the best suitab

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15

Nácher-Vázquez, Montserrat, Ana Barbosa, Inês Armelim, et al. "Development of a Novel Peptide Nucleic Acid Probe for the Detection of Legionella spp. in Water Samples." Microorganisms 10, no. 7 (2022): 1409. http://dx.doi.org/10.3390/microorganisms10071409.

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Legionella are opportunistic intracellular pathogens that are found throughout the environment. The Legionella contamination of water systems represents a serious social problem that can lead to severe diseases, which can manifest as both Pontiac fever and Legionnaires’ disease (LD) infections. Fluorescence in situ hybridization using nucleic acid mimic probes (NAM-FISH) is a powerful and versatile technique for bacterial detection. By optimizing a peptide nucleic acid (PNA) sequence based on fluorescently selective binding to specific bacterial rRNA sequences, we established a new PNA-FISH me

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16

Hussain, Aamir, Muhammad Omer Bin Saeed, Mohammad Bilal Malik, Muhammad Asim Ajaz, and Muhammad Salman. "Pseudo Noise Sequence Coded Continuous Radar: A Signal Processing Algorithm." Arabian Journal for Science and Engineering 36, no. 7 (2011): 1297–312. http://dx.doi.org/10.1007/s13369-011-0123-z.

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17

Xie, Hui, Zhongchen Zhao, Limin Liu, and Zhuangzhi Han. "Blind Estimation Method of the Pseudo-Noise sequence of DS-SS Signals Based on Improved Propagator." Journal of Physics: Conference Series 2356, no. 1 (2022): 012055. http://dx.doi.org/10.1088/1742-6596/2356/1/012055.

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The problem of pseudo-noise (PN) sequence estimation of direct sequence spread spectrum (DS-SS) signals is studied in this paper. A new estimation method for PN sequence is given based on improved propagator. The algorithm could estimate the spread spectrum sequence and the signal out-of-step time by using the signal subspace. Compared with the eigenvalue decomposition (EVD) method, the estimation accuracy of the out-of-step time is improved and the amount of calculation is effectively reduced. Computational complexity and performance comparisons are made between the new method and the existin

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18

Pliushch, Oleksandr. "USE OF PSEUDO NOISE CODING SEQUENCE CYCLIC SHIFTS FOR TELECOMMUNICATION CHANNEL PERFORMANCE IMPROVEMENT." Cybersecurity: Education, Science, Technique 1, no. 9 (2020): 126–39. http://dx.doi.org/10.28925/2663-4023.2020.9.126139.

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An approach is proposed to design of noise immune and concealed data transfer channel for telecommunication networks. Attention is paid to securing hidden information transmission, as well as its protection from interception by rogue actors. The approach is based on the desired bits spectrum spreading and their additional scrambling by using pseudo noise coding sequences derived from primitive polynomials of eighth and fifteenth orders, which possess good auto and inter correlation properties. It is studied performance of the telecommunication channel that includes frames of 128 bit length, ea

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19

Zhang, Jing, and San Cai Li. "Blind Source Separation Method Based on Pseudo-Random Code." Applied Mechanics and Materials 135-136 (October 2011): 336–40. http://dx.doi.org/10.4028/www.scientific.net/amm.135-136.336.

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According to pseudo noise communication and related characteristics of pseudo-random code, this paper proposed a blind source separation method. The method can separate the different pseudo-code sequence from the pseudo-code wide frequency signal. The method can quickly and accurately isolate and identify the pseudo–code feature of different user, to get the user’s voice or data information, which has good application prospects.

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20

Sachs, J., P. Peyerl, S. Wöckel, M. Kmec, R. Herrmann, and R. Zetik. "Liquid and moisture sensing by ultra-wideband pseudo-noise sequence signals." Measurement Science and Technology 18, no. 4 (2007): 1074–87. http://dx.doi.org/10.1088/0957-0233/18/4/016.

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21

Wang, Xianxiang, Juzhi Deng, and Jingli Ren. "Selection of code width and analysis of influencing factors in multitransient electromagnetic method." Geophysical Journal International 220, no. 1 (2019): 160–73. http://dx.doi.org/10.1093/gji/ggz436.

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SUMMARY The multitransient electromagnetic method (MTEM) uses an m pseudo-random binary sequence (PRBS) as the source waveform, which requires deconvolution to recover the impulse response. To obtain high-precision impulse responses, the frequency bandwidth of a pseudo-random sequence should be consistent with the identified system. Code width is an important parameter of an m pseudo-random sequence which determines the maximum frequency bandwidth of an m pseudo-random sequence. If the code width is too wide, the signal-to-noise ratio of the high-frequency section cannot be guaranteed; if it i

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22

Liu, Lanjun, Hao Zhao, Ming Li, et al. "Modelling and Simulation of Pseudo-Noise Sequence-Based Underwater Acoustic OSDM Communication System." Applied Sciences 9, no. 10 (2019): 2063. http://dx.doi.org/10.3390/app9102063.

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Orthogonal signal division multiplex (OSDM) is an emerging signal modulation technology which has a lower peak-to-average power ratio (PAPR) and a flexible subcarrier system architecture. Particularly, it can be seen as a bridge between the single-carrier modulation and the orthogonal frequency division multiplexing (OFDM) modulation in the frequency domain. Aiming at the development trend and demand of underwater acoustic hybrid and adaptive modulation communication technology, a pseudo-noise (PN) sequence-based underwater acoustic OSDM communication system is proposed in this paper. A data f

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23

Zellal, Somia, Adda Ali-Pacha, Mohand Lagha, and Mohamed Krim. "Spread Spectrum Data Transmission System for User Unmanned Aerial Vehicles." Transport and Telecommunication Journal 26, no. 2 (2025): 118–32. https://doi.org/10.2478/ttj-2025-0010.

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Abstract In today’s world of unmanned aerial vehicle (UAV) telecommunications, data transmission is both important and delicate. Various organizations have used special techniques to ensure reliable transmission and stable communication. At this stage, we propose a method that enhances security and makes the transmission of data and image more resistant to interference and eavesdropping while improving signal reliability; this method is based on the Direct Sequence-Spread Spectrum (DS-SS) technique with a new pseudo-noise PN sequence created by merging chaotic and Barker sequences. MATLAB simu

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24

HABUCHI, Hiromasa. "Pseudo-Noise Sequences Based on M-sequence and Its Application for Communications." IEICE ESS FUNDAMENTALS REVIEW 3, no. 1 (2009): 32–42. http://dx.doi.org/10.1587/essfr.3.1_32.

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25

Saranya, G. "An efficient data hiding method in images." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 6 (2019): 4713–20. https://doi.org/10.11591/ijece.v9i6.pp4713-4720.

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Data Hiding has a huge range of applications in the medical field for transmission. It is helpful in securing the documentation of the patients from the violator with good storage space. The medical images of different modalities like CT, MRI, and PET with the digitized clinical information can be sent to the doctors across the world for the treatment. Due to the bandwidth and storage constraints, medical images along with the clinical information must be compressed before transmission and storage. This paper gives a technique for hiding the digitized clinical information along with the DICOM

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26

HAYASHI, Takafumi, Takao MAEDA, Shigeru KANEMOTO, and Shinya MATSUFUJI. "Low-Peak-Factor Pseudo-White-Noise Sequence Set with Optimal Zero-Correlation Zone." IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E97.A, no. 12 (2014): 2343–51. http://dx.doi.org/10.1587/transfun.e97.a.2343.

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27

Kokin, Dmitry Sergeevich, and Oleg Gennadievich Ponomarev. "APPLICATION OF DETERMINATED NOISE IN A RADIO COMMUNICATION SYSTEM WITH DIGITAL MODULATION." Chronos 7, no. 4(66) (2022): 52–54. http://dx.doi.org/10.52013/2658-7556-66-4-13.

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The article describes a communication system with digital pseudo-random modulation. The system is one of the variants of spread spectrum radio communication systems. This communication system uses deterministic noise as the spreading sequence. The noise immunity of the considered communication system can be changed by scaling the spreading factor — the length of the modulation symbol. By increasing the spreading factor, not only an increase in the noise immunity of the system is achieved, but also the possibility of separating subscribers simultaneously operating in a common frequency band. It

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28

Zaurbek, A., and D. Z. Dzhuruntaev. "DIGITAL OSCILLATOR CIRCUIT WITH AN EXTENDED REPETITION PERIOD OF A PSEUDO-RANDOM PULSE SEQUENCE." BULLETIN Series of Physics & Mathematical Sciences 69, no. 1 (2020): 210–14. http://dx.doi.org/10.51889/2020-1.1728-7901.36.

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In this paper, we consider the issue of upgrading the circuit of a digital generator of a pseudo-random pulse sequence, which can be used to create cryptographic encryption algorithms. The need to modernize the digital generator circuit is associated with an increase in the number of pseudorandom pulse train sequences generated at its output and with pseudorandom intervals between them. To achieve this, a small number of additional elements are included in the circuit of a digital pseudorandom sequence of pulses based on a five-digit shift register with linear feedback. Based on the modernized

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29

Al-Rawi, Muhanned. "Study of Code Acquisition of FHSS System Over Rician Channel." Land Forces Academy Review 24, no. 1 (2019): 68–76. http://dx.doi.org/10.2478/raft-2019-0008.

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Abstract Frequency hopping is used in different communications systems for its robustness by providing frequency diversity against jamming and interfering signals. Successful detection and demodulation of a frequency hopping signal is dependent on proper tuning to transmit frequency and time synchronization of the burst. The sequence of hop frequencies is generally determined by a Pseudo-Noise (PN) sequence and time synchronization is achieved using synchronization preambles in the transmit burst. Successful acquisition of the hop frequency sequence could be achieved when at least a single bur

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30

Tsankov, Tsvetoslav, Tihomir Trifonov, and Lilia Staneva. "AN ALGORITHM FOR SYNTHESIS OF PHASE MANIPULATED SIGNALS WITH HIGH STRUCTURAL COMPLEXITY." Journal scientific and applied research 4, no. 1 (2013): 80–87. http://dx.doi.org/10.46687/jsar.v4i1.84.

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In the paper an algorithm for synthesis of pseudo-noise signals with high structural complexity is presented. It is based on the possibility the elements of the finite algebraic fields to be generated by means of a linear recurring sequence with maximal length. The algorithm can be used in the development of communication systems with high resistance to hostile radio-electronic environment.

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31

K L, Sudha, Rajagopal A, and Dundi Ajay. "FPGA IMPLEMENTATION OF A PSEUDO NOISE SEQUENCE USING CHAOTIC TENT MAP FOR SATELLITE COMMUNICATION." ICTACT Journal on Microelectronics 1, no. 4 (2016): 155–59. http://dx.doi.org/10.21917/ijme.2016.0025.

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Tai, N., Y. J. Pan, and N. C. Yuan. "Quasi-Coherent Noise Jamming to LFM Radar Based on Pseudo-random Sequence Phase-modulation." Radioengineering 24, no. 4 (2015): 1013–24. http://dx.doi.org/10.13164/re.2015.1013.

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33

Na, Zhenyu, Mengshu Zhang, Mudi Xiong, Junjuan Xia, Xin Liu, and Weidang Lu. "Pseudo-Noise Sequence Based Synchronization for Generalized Frequency Division Multiplexing in 5G Communication System." IEEE Access 6 (2018): 14812–19. http://dx.doi.org/10.1109/access.2018.2814682.

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34

Wang, Jianing, Chengyu Wang, Jun Huang, Ming Gao, and Aoying Zhou. "Uncertainty-Aware Self-Training for Low-Resource Neural Sequence Labeling." Proceedings of the AAAI Conference on Artificial Intelligence 37, no. 11 (2023): 13682–90. http://dx.doi.org/10.1609/aaai.v37i11.26603.

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Neural sequence labeling (NSL) aims at assigning labels for input language tokens, which covers a broad range of applications, such as named entity recognition (NER) and slot filling, etc. However, the satisfying results achieved by traditional supervised-based approaches heavily depend on the large amounts of human annotation data, which may not be feasible in real-world scenarios due to data privacy and computation efficiency issues. This paper presents SeqUST, a novel uncertain-aware self-training framework for NSL to address the labeled data scarcity issue and to effectively utilize unlabe

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35

Chiang, Yi Te, He Sheng Wang, and Yung Nien Wang. "A Chaotic-Based Pseudo-Random Bit Generator for Navigation Applications." Applied Mechanics and Materials 311 (February 2013): 99–104. http://dx.doi.org/10.4028/www.scientific.net/amm.311.99.

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In this paper, we propose a novel method to generate pseudo-random-noise (PRN) bits for navigation applications. In the present method, the code sequence generator is constructed based on two chaotic logistic maps running parallel and starting from independent initial conditions. The logistic map is a simple mathematical model that shows bewildering complex behavior. By appro-priately setting the initial conditions, the PRN sequence is then generated by comparing the outputs of both logistic maps. Several simulations are set up to verify the correlation properties of the pseudo-random bit gene

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Wei, Yangjie, Shiliang Fang, Xiaoyan Wang, and Shuxia Huang. "Blind Estimation of the PN Sequence of A DSSS Signal Using A Modified Online Unsupervised Learning Machine." Sensors 19, no. 2 (2019): 354. http://dx.doi.org/10.3390/s19020354.

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Direct sequence spread spectrum (DSSS) signals are now widely used in air and underwater acoustic communications. A receiver which does not know the pseudo-random (PN) sequence cannot demodulate the DSSS signal. In this paper, firstly, the principle of principal component analysis (PCA) for PN sequence estimation of the DSSS signal is analyzed, then a modified online unsupervised learning machine (LEAP) is introduced for PCA. Compared with the original LEAP, the modified LEAP has the following improvements: (1) By normalizing the system state transition matrices, the modified LEAP can obtain b

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Chen, Shao Hua, Jia Qi Li, and Ju Wang. "A Scheme on PN Code Tracking of DS/FH Signals for Telemetry Tracking, and Commanding (TT&C)." Applied Mechanics and Materials 195-196 (August 2012): 159–64. http://dx.doi.org/10.4028/www.scientific.net/amm.195-196.159.

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The impact of Doppler frequency hopping on code tracking performance is simulated. A design on pseudo-noise (PN) Code Tracking Loop aided by the carrier tracking loop according to the carrier frequency hoping pattern is proposed in this paper. This scheme can be applied in the Telemetry, Tracking, and Commanding system which uses Direct Sequence/Frequency Hopping Spread Spectrum (DS/FH) hybrid spread spectrum technology. Simulations of the code tracking loop under different carrier to noise ratios are compared based on this scheme. The results show this method on PN code tracking of DS/FH sign

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Ustinavičius, Tomas. "DIGITAL PROCESSING OF INVESTIGATED DAC’S SIGNALS." Mokslas - Lietuvos ateitis 2, no. 1 (2010): 45–49. http://dx.doi.org/10.3846/mla.2010.010.

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The article shows that in designed algorithm for determination of digital signal processing and settling time of DAC the greatest influence on the test has 1/f type internal noise of the sampling converter. It is offered to filter the preliminary digital signal and to construct pseudo-periodic sequence from n realization periods of examined signals and internal noise. It is shown, that standard digital filters because of very high the demands are not suitable. The structure of digital comb filter is proposed. Investigations have shown that the given filter can effectively be used for filtering

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ARGÜELLO, FRANCISCO, MANUEL BUGALLO, and MARGARITA AMOR. "MULTI-USER RECEIVERS FOR SPREAD SPECTRUM COMMUNICATIONS BASED ON CHAOTIC SEQUENCES." International Journal of Bifurcation and Chaos 12, no. 04 (2002): 847–53. http://dx.doi.org/10.1142/s0218127402004723.

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Spread spectrum based on chaotic sequences is an alternative to spread spectrum based on pseudo-noise sequences. In this letter we present the application of two multi-user detection methods (parallel and successive interference cancellation schemes) to this type of code division multiple access. We demonstrate that, also for chaotic sequence-based communications, multi-user receivers significantly improve the BER with respect to single-user receivers, and that their use is practically essential with a high number of users.

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Semenko, Anatoliy, Nikolaj Kushnir, Natalia Bokla, and Yevhen Shestopal. "SYNTHESIS OF STRIP-BAND TELECOMMUNICATION SYSTEM WITH INCREASED CONFIDENTIALITY OF INFORMATION TRANSMISSION THROUGH USE OF PSSEVDOVIDOVYPOVY." Visnyk Universytetu “Ukraina”, no. 1 (28) 2020 (2020): 65–74. http://dx.doi.org/10.36994/2707-4110-2020-1-28-06.

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Currently, special attention is paid to the creation of broadband telecommunications systems with a noise-like signal. Such systems have indisputable advantages in noise immunity, in the confidentiality of information transmission, electromagnetic compatibility with neighboring electronic devices. The formation of a broadband signal in most cases is carried out by the method of direct spreading of the spectrum by manipulating the carrier frequency signal by a pulse pseudo-random sequence (PVP) –m-sequence, Gold, Kasami, Walsh sequence. Sequences such as a well-known attacker can pick up in the

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Cathignol, Dominique Jean. "Signal-to-Clutter Ratio in Pseudo Random Doppler Flowmeter." Ultrasonic Imaging 8, no. 4 (1986): 272–84. http://dx.doi.org/10.1177/016173468600800404.

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In order to increase the signal-to-noise ratio of Doppler velocimeters, several authors have proposed to use the emission of a sine wave phase modulated by a pseudorandom binary sequence with an on/off ratio equal to unity. The velocity measurement of the scatterers located in the range cell volume may be perturbed by all the other reflecting clutter targets which are moving in the ultrasonic field. The ratio between the Doppler signal issuing from the range cell and that from the mobile clutter targets will be defined as the signal-to-mobile clutter ratio (SCR)m. We have evaluated the (SCR)m

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Youn, Chang-Hyun, Hyung-In Ra, Hyun-Woo Jeong, et al. "Underwater acoustic communication based on chirp spread spectrum with cyclic shifted PN sequences." Journal of the Acoustical Society of America 151, no. 4 (2022): A281. http://dx.doi.org/10.1121/10.0011348.

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In this presentation, we propose a new underwater acoustic communication technique that combines a binary PN (Pseudo Noise) sequence to which cyclic shift is applied and a CSS (Chirp Spread Spectrum) method that is robust against low Doppler shift. PN sequences are known to have sharp autocorrelation function and cyclic properties. In the case of the previous CSS method, 1-bit per symbol was mapped according to the sign of the slope in the time-frequency domain of the chirp signal, but the proposed method maps 2-bit per symbol according to the cyclic shift direction of PN sequence and the slop

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Ageykin, Nikita A., Vladimir I. Grachev, Nadezhda G. Petrova, Alexander M. Popov, Viktor I. Ryabenkov, and Vladimir V. Kolesov. "Information Technologies Based on Noise-like Signals: III. Spectrum of Sequences Periods Forming by a Discrete Chaotic Algorithm." Radioelectronics. Nanosystems. Information Technologies. 14, no. 3 (2022): 269–78. http://dx.doi.org/10.17725/rensit.2022.14.269.

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The patterns of formation of pseudo-random sequences by discrete chaotic algorithms with a delay of the Fibonacci type are studied. The algorithms are defined on a closed interval of integers; the generated numbers are returned to a given interval, which provides an effective mechanism for mixing in the phase space. For various values of the parameters, the spectra of periods of sequences are determined for an arbitrary set of initial values that uniquely determine the state of the system in its phase space. Relationships are obtained that make it possible to reduce the search time for the max

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Slimani, Dalila, and Fatiha Merazka. "Encryption Of Speech Signal With Multiple Secret Keys." AL-Lisaniyyat 22, no. 2 (2016): 49–56. http://dx.doi.org/10.61850/allj.v22i2.374.

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In this paper, we proposed an encryption system for speech signals based on circular shifts in row and column. This cryptosystem uses three secret keys. The original key is generated, randomly, using a pseudo noise sequence generator, and the two other keys are obtained by using the main key. The encryption system also uses Discrete Cosine Transform (DCT) or the Discrete Sine Transform (DST) to remove the signal intelligibility. Moreover, the performance of the proposed algorithm is also estimated by correlation coefficient quantity.

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Kim, Min, Jinhyoung Park, Qifa Zhou, and Koping Shung. "Novel Configurations of Ultrahigh Frequency (≤600 MHz) Analog Frontend for High Resolution Ultrasound Measurement." Sensors 18, no. 8 (2018): 2598. http://dx.doi.org/10.3390/s18082598.

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In this article, an approach to designing and developing an ultrahigh frequency (≤600 MHz) ultrasound analog frontend with Golay coded excitation sequence for high resolution imaging applications is presented. For the purpose of visualizing specific structures or measuring functional responses of micron-sized biological samples, a higher frequency ultrasound is needed to obtain a decent spatial resolution while it lowers the signal-to-noise ratio, the difference in decibels between the signal level and the background noise level, due to the higher attenuation coefficient. In order to enhance t

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Oh, Sukyoon, Zhe Sun, Tong Tian, and Christian Spielmann. "Improvements of Computational Ghost Imaging by Using Sequenced Speckle." Applied Sciences 13, no. 12 (2023): 6954. http://dx.doi.org/10.3390/app13126954.

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This study presents a computational ghost imaging (GI) scheme that utilizes sequenced random speckle pattern illumination. The primary objective is to develop a speckle pattern/sequence that improves computational time without compromising image quality. To achieve this, we modulate the sequence of speckle sizes and design experiments based on three sequence rules for ordering the random speckle patterns. Through theoretical analysis and experimental validation, we demonstrate that our proposed scheme achieves a significantly better contrast-to-noise rate (CNR) compared to traditional GI at a

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Wu Xueqi, 吴雪琪, 刘剑飞 Liu Jianfei, 曾祥烨 Zeng Xiangye, 卢嘉 Lu Jia, and 许彦朋 Xu Yanpeng. "Timing Synchronization Algorithm for Coherent Optical Orthogonal Frequency Division Multiplexing System Based on Pseudo Noise Sequence." Acta Optica Sinica 39, no. 5 (2019): 0506001. http://dx.doi.org/10.3788/aos201939.0506001.

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Cui, Bao Zhen, Ze Bing Wang, and Hong Xia Pan. "The Study of Local Wave Noise Reduction Based on the Correlation Analysis." Advanced Materials Research 588-589 (November 2012): 707–10. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.707.

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The signal can be divided into a number of intrinsic mode components (IMF) through local wave decomposition. The decomposition process is equivalent to the adaptive filter for signal. The frequencies of each IMF have reduced with the decomposition order. This paper established judgment criteria of signal, noise and pseudo component based on the local wave decomposition, used the characteristics of cross-correlation coefficient and autocorrelation sequence, combined with the power spectral density. The dominant mode function was extracted effectively and the final effects are used gear reducer

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YONG, REN, YONGXIANG XIA, XIUMING SHAN, and YUAN JIAN. "DRIVING SYNCHRONIZATION OF SPATIOTEMPORAL CHAOS AND ITS APPLICATIONS IN CDMA COMMUNICATIONS." International Journal of Bifurcation and Chaos 11, no. 12 (2001): 3117–24. http://dx.doi.org/10.1142/s0218127401004042.

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This paper investigates the driving synchronization of spatiotemporal chaos. Using this method, synchronization could be achieved efficiently. By improving the driving sequence generation method, the spatial periodicity in the original system is overcome. Large quantities of chaotic sequences are available, which possess the excellent properties expected in Code Division Multiple Access (CDMA) communications. These chaotic sequences can be used as the spreading sequences in place of the traditional pseudo-noise sequences. We also evaluate the performance of the chaotic CDMA communication syste

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Ma, Chunjiang, Xiaomei Tang, Zhicheng Lv, Zhibin Xiao, and Guangfu Sun. "High-Precision Pseudo-Noise Ranging Based on BOC Signal: Zero-Bias Mitigation Methods." Applied Sciences 9, no. 15 (2019): 3162. http://dx.doi.org/10.3390/app9153162.

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In high precision applications based on binary subcarrier offset (BOC) signals, zero-bias of the digital discriminator is an error of importance. Unlike the thermal noise error, zero-bias is a fixed deviation that is challenging to eliminate by filtering in the time domain. In this paper, a statistical error analysis model for the zero-bias of BOC signal’s digital phase discriminator is established. The evaluation of the zero-bias is inseparable from the spreading code sequence and the initial phase of the signal through defining the concept of statistics maximum and statistics standard deviat

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