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Journal articles on the topic 'Baseband signal generator'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

SONG, Tianlong, Qing CHANG, and Wei QI. "Design of a Baseband Signal Generator in Navigation Satellite Signal Simulators." IEICE Transactions on Communications E95-B, no. 2 (2012): 680–83. http://dx.doi.org/10.1587/transcom.e95.b.680.

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Zuo, Yun Hua, Jun Yang, and Xiao Yu Cheng. "Design and Implementation of Manchester CODEC Based on FPGA." Applied Mechanics and Materials 273 (January 2013): 805–9. http://dx.doi.org/10.4028/www.scientific.net/amm.273.805.

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This paper designed and realized Manchester encoder and decoder based on FPGA. The M sequence generator produced input baseband signal, Manchester CODEC possessed parity check function, and the output signals of encoding and decoding were stable. This design used VHDL language programme, encoder and decoder used modular design, simulated and tested in Altera development software Quartus II 8.0, and downloaded to FPGA chip Cyclone II EP2C35F672C6 for verification. The results showed that the design scheme is good to realize Manchester CODEC, and possesses good stability and reliability.

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Boscolo, Antonio, Francesca Vatta, Francesco Armani, Emanuele Viviani, and Daniele Salvalaggio. "Physical AWGN Channel Emulator for Bit Error Rate Test of Digital Baseband Communication." Applied Mechanics and Materials 241-244 (December 2012): 2491–95. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.2491.

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This paper presents a physical channel emulator solution for applications such as Bit Error Rate Testing of Error Correcting Codes. The solution relies on an analog White Gaussian Noise Generator coupled additively with an analog data signal to emulate the communication channel. This is interfaced to a computer through a USB connection, allowing the use of programs in different environments, such as Matlab and Labview. This solution can allow different types of channels to be emulated and with different noise sources. A software-based method to measure Signal to Noise Ratio and to characterize

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Schulte, B., T. Musch, and B. Schiek. "A fast vectorial network analyser for frequencies up to 4 GHz." Advances in Radio Science 2 (May 27, 2005): 13–17. http://dx.doi.org/10.5194/ars-2-13-2004.

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Abstract. A fast four channel network analyser is introduced to measure S-parameters in a frequency range from 10MHz to 4GHz. The measurement period of this kind of network analyser is short in comparison with a conventional one, which becomes possible by using highly linear analogue frequency ramps, realized with fractional divider phase locked loop circuits. The settling time for the discrete frequency points, which is typical for a conventional network analyser, is nearly eliminated by the use of frequency ramps. To achieve the necessary bandwidth of 4 GHz in the baseband, a heterodyne prin

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Freire Hermelo, Maria, Rattana Chuenchom, Vitaly Rymanov, et al. "Photonic-Assisted mm-Wave and THz Wireless Transmission towards 100 Gbit/s Data Rate." Frequenz 71, no. 9-10 (2017): 485–97. http://dx.doi.org/10.1515/freq-2017-0147.

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Abstract This paper presents photonic-assisted 60 GHz mm-wave and 325 GHz system approaches that enable the transmission of spectral-efficient and high data rate signals over fiber and over air. First, we focus on generic channel characteristics within the mm-wave 60 GHz band and at the terahertz (THz) band around 325 GHz. Next, for generating the high data rate baseband signals, we present a technical solution for constructing an extreme bandwidth arbitrary waveform generator (AWG). We then report the development of a novel coherent photonic mixer (CPX) module for direct optic-to-RF conversio

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Bai, Na, Liang Wang, Yaohua Xu, and Yi Wang. "Design of a Digital Baseband Processor for UHF Tags." Electronics 10, no. 17 (2021): 2060. http://dx.doi.org/10.3390/electronics10172060.

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In this paper, we present a new digital baseband processor for UHF tags. It is a low-power and low-voltage digital circuit and adopts the Chinese military standard protocol GJB7377.1. The processor receives data or commands from the RF front-end and carries out various functions, such as receiving and writing data to memory, reading and sending memory data to the RF front-end and killing tags. The processor consists of thirteen main sub-modules: TPP decoding, clock management, random number generator, power management, memory controller, cyclic redundancy check, FM0 encoding, input data proces

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Hühn, Florian, Andreas Wentzel, and Wolfgang Heinrich. "A new modulator for digital RF power amplifiers utilizing a wavetable approach." International Journal of Microwave and Wireless Technologies 9, no. 6 (2017): 1251–60. http://dx.doi.org/10.1017/s1759078717000770.

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This paper presents for the first time a wavetable-based coding scheme to generate a high-speed binary input signal for digital RF power amplifiers. The approach maximizes the utilization of the time domain handling capabilities of the pulse forming circuit. Key features are a greatly improved output spectrum purity in comparison with common digital modulators, the ability to adjust the modulator to any given pulse forming hardware and a built-in signal correction option that comes without additional computational cost. To give a first impression on the modulators behavior and its possibilitie

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Wang, Huan, Chang Xing Li, and Yong Zhuang Li. "Code Rate Estimation Algorithm for BPSK Signal Based on Wavelet Transformation." Advanced Materials Research 740 (August 2013): 178–82. http://dx.doi.org/10.4028/www.scientific.net/amr.740.178.

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A wavelet transformation based estimating algorithm for the symbol rate of BPSK signals is adopted . This method extracts baseband signal from the generated BPSK modulated signal by means of different ways, utilizing the modulus of wavelet transformation coefficients of this baseband signal to construct a singular pulse sequence consistent with the code rate of original modulated signal. Theoretical analysis on the power spectrum of this singular pulse sequence indicates that there exist discrete spectral lines in the integral multiples of baseband signal symbol rate, thus detecting these disc

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Liang, Dong, Qing Gui Tan, Wei Jiang, Xiao Jun Li, and Zhong Bo Zhu. "Generation of Frequency 12-Tupling Millimeter-Wave Using one DPMZM to Overcome Chromatic Dispersion." Applied Mechanics and Materials 713-715 (January 2015): 1184–87. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.1184.

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In this paper, a approach for frequency 12-tupling millimeter-wave generation using one DPMZM (Dual-Parallel Mach-Zehnder Modulator) to overcome chromatic dispersion is demonstrated. The millimeter-wave with the baseband signal carried only by minus 6-th order sideband is generated by properly adjusting a series of parameters. As the signal transmittes along the fiber, there is no time shift caused by chromatic dispersion. Theoretical analyses and simulated results show that when the optical mm-wave carrying 2.5Gbps baseband signal transmits over 55 Km, the eye diagram still keeps open and cle

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Yang, Zhixian, Kun Qu, and Xiang Liu. "Frequency-Octupling Millimeter-Wave Optical Vector Signal Generation via an I/Q Modulator-Based Sagnac Loop." Symmetry 11, no. 1 (2019): 84. http://dx.doi.org/10.3390/sym11010084.

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A new method for generating frequency-octupling millimeter-wave (mm-wave) vector signals in optical fields via a Sagnac loop is proposed. In this scheme, two orthogonally polarized fourth order sidebands can be obtained through an integrated dual-polarization quadrature phase shift keying (DP-QPSK) modulator. The two optical sidebands are sent into an I/Q modulator-based Sagnac loop. The I/Q modulator is modulated by a 16QAM baseband signal. In the Sagnac loop, one of the sidebands is modulated by the baseband vector signal along one direction, and the other sideband is unmodulated along the o

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Schnick, O., and W. Mathis. "Realisierung eines verzerrungsarmen Open-Loop Klasse-D Audio-Verstärkers mit SB-ZePoC." Advances in Radio Science 5 (June 13, 2007): 225–30. http://dx.doi.org/10.5194/ars-5-225-2007.

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Abstract. In den letzten Jahren hat die Entwicklung von Klasse-D Verstärkern für Audio-Anwendungen ein vermehrtes Interesse auf sich gezogen. Eine Motivation hierfür liegt in der mit dieser Technik extrem hohen erzielbaren Effizienz von über 90%. Die Signale, die Klasse-D Verstärker steuern, sind binär. Immer mehr Audio-Signale werden entweder digital gespeichert (CD, DVD, MP3) oder digital übermittelt (Internet, DRM, DAB, DVB-T, DVB-S, GMS, UMTS), weshalb eine direkte Umsetzung dieser Daten in ein binäres Steuersignal ohne vorherige konventionelle D/A-Wandlung erstrebenswert erscheint. Die kl

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Chen, Fa Tang, and Chi Yun Xu. "Research on a High Effective Algorithm of PRACH Baseband Signal in TD-LTE System." Applied Mechanics and Materials 380-384 (August 2013): 4031–34. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.4031.

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Random Access Procedure is a bridge between idle mode and connection mode in LTE system, and the algorithm of PRACH baseband signal we use will influence the performance of LTE system. A kind of High effective algorithm of PRACH baseband signal is introduced in this paper based on the research and analysis on the present PRACH baseband generation algorithm .By comparing and simulation, we find the algorithm introduced in this paper is feasible and effective. And this algorithm has been used in the RF conformance test system in LTE system.

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Wu, Xiang Yu, Jin Rui Liu, Hang Gong, and Gang Ou. "Software Simulation Method for Digital if GNSS Signal." Advanced Materials Research 756-759 (September 2013): 2655–59. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.2655.

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Data simulation is an important auxiliary method for baseband signal processing algorithm design of digital IF GNSS receiver. Especially when the high sensitivity and high dynamic receivers are developed, or multipath and cross correlation mitigation techniques are considered, exact and complete tests under all kinds of necessary scenes can be carried out with the IF signal data which is generated by software simulation method. With this method, the developing efficiency can be improved and the cost can be cut down. In this paper, precise model of the IF signal is given firstly through analyzi

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14

Schmalz, Klaus, Eckard Grass, Frank Herzel, and Maxim Piz. "An Integrated 5 GHz Wideband Quadrature Modem for OFDM Gbit/s Transmission in SiGe:C BiCMOS." International Journal of Microwave Science and Technology 2007 (October 1, 2007): 1–8. http://dx.doi.org/10.1155/2007/47927.

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This paper presents a 5 GHz wideband I/Q modulator/demodulator for 650 MHz OFDM signal bandwidth, which is integrated with a 5 GHz phase locked loop for I/Q generation. The quadrature signals are derived from a 10 GHz CMOS VCO followed by a bipolar frequency divider. The phase noise at 1 MHz offset is −112 dBc/Hz for the modulator as well as for the demodulator. The chips were produced in a 0.25 μm SiGe BiCMOS technology. The signal-to-noise ratio (SNR) of transmitted/received OFDM signal and the corresponding I/Q mismatch versus baseband frequency are given. The modulator achieves an SNR of 2

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15

Ying, Xiang Yue, Tai Jun Liu, Jun Li, Hua Feng Weng, and Li Liu. "Simultaneous Generation of Independent Wired and Wireless Signals Using a Dual-Electrode MZM in ROF System." Applied Mechanics and Materials 543-547 (March 2014): 2296–99. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.2296.

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In this paper, a novel Radio-over-Fiber scheme to simultaneously generate and transmit baseband (BB) and millimeter-wave (MMW) signal by using a single dual-electrode MZM is proposed. By employing this analog ROF signal transmission techniques, highly transparent fiber-wireless networks, which are ideal for multi-standard wireless system operation can be realized.

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WANG, XINGANG, and C. H. LAI. "ON GENERATING BINARY SPATIOTEMPORAL CHAOTIC SEQUENCES AND ITS APPLICATION ON SPREAD-SPECTRUM COMMUNICATIONS." International Journal of Bifurcation and Chaos 16, no. 01 (2006): 213–19. http://dx.doi.org/10.1142/s0218127406014745.

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A code generator is designed based on a one-way coupled map lattice (OCML) system, and application of the generated binary spatiotemporal chaotic sequences on baseband spread spectrum communication is investigated. Random characters and the correlation properties of quantized signals are discussed, and error performance in communication is analyzed. It is shown that these sequences not only possess extremely high security in comparison with both conventional sequences and earlier chaotic communication schemes, but also show good performance on the Bit Error Rate (BER). The system also has the

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Vennemann, T., T. Frye, Z. Liu, M. Kahmann, and W. Mathis. "A novel ZePoC encoder for sinusoidal signals with a predictable accuracy for an AC power standard." Advances in Radio Science 13 (November 3, 2015): 1–8. http://dx.doi.org/10.5194/ars-13-1-2015.

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Abstract. In this paper we present an analytical formulation of a Zero Position Coding (ZePoC) encoder for an AC power standard based on class-D topologies. For controlling a class-D power stage a binary signal with special spectral characteristics will be generated by this ZePoC encoder for sinusoidal signals. These spectral characteristics have a predictable accuracy within a separated baseband to keep the noise floor below a specified level. Simulation results will validate the accuracy of this novel ZePoC encoder. For a real-time implementation of the encoder on a DSP/FPGA hardware archite

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Shang, Wen Jing, Sheng Guo Zhou, Nan Wang, and Victor Rublev. "Research on the Method of CPM Signal Phase Smoothing Based on Different Power Sine Function." Advanced Materials Research 981 (July 2014): 417–21. http://dx.doi.org/10.4028/www.scientific.net/amr.981.417.

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Continuous phase modulation (CPM) signal has the advantages of high bandwidth efficiency, continuous phase, faster decay speed of power spectrum, constant envelope and so on, which is widely used in communication systems. The degree of the phase smoothing is one of main factors that affect the decay speed of CPM signal power spectrum. One method of smoothing CPM signal phase based on different power sine function as the frequency modulation function is proposed. We draw the phase trajectory of baseband signal and the normalized power spectrum by using the MATLAB software. The spectrum characte

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Li, Xiao Wen, Mao Yue Wang, and Dan Wang. "The Research on PRACH Receiver and the DSP Implementation." Applied Mechanics and Materials 543-547 (March 2014): 2518–21. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.2518.

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In LTE system, random access plays an important role in both uplink time adjustment and initial access of UE. This paper analyzes the theory of the related signal detection and the correlation calculation, and proposes a method to detect the received sequence in the receiver. And at last, it presents the implementation on DSP including the baseband signal processing module, Local frequency domain ZC sequence generation module and Correlation calculation module. In a word, it provides a solution for implement the PRACH receiver on hardware.

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Mitsolidou, Charoula, Christos Vagionas, Agapi Mesodiakaki, et al. "A 5G C-RAN Optical Fronthaul Architecture for Hotspot Areas Using OFDM-Based Analog IFoF Waveforms." Applied Sciences 9, no. 19 (2019): 4059. http://dx.doi.org/10.3390/app9194059.

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Analog fronthauling is currently promoted as a bandwidth and energy-efficient solution that can meet the requirements of the Fifth Generation (5G) vision for low latency, high data rates and energy efficiency. In this paper, we propose an analog optical fronthaul 5G architecture, fully aligned with the emerging Centralized-Radio Access Network (C-RAN) concept. The proposed architecture exploits the wavelength division multiplexing (WDM) technique and multicarrier intermediate-frequency-over-fiber (IFoF) signal generation per wavelength in order to satisfy the demanding needs of hotspot areas.

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Li, Yue, Liang Ye, and Xuejun Sha. "Time-Frequency Energy Sensing of Communication Signals and Its Application in Co-Channel Interference Suppression." Sensors 18, no. 7 (2018): 2378. http://dx.doi.org/10.3390/s18072378.

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As the number of mobile users and video traffics grow explosively, the data rate demands increase tremendously. To improve the spectral efficiency, the spectrum are reused inter cell or intra cell, such as the ultra dense network with multi-cell or the cellular network with Device-to-Device communications, where the co-channel interferences are brought and needs to be suppressed. According to the time-frequency energy sensing to the communication signals, the desired signal and the interference signal have different energy concentration areas on the time frequency plane, which provide opportun

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de Figueiredo, Felipe A. P., Ruben Mennes, Irfan Jabandžić, Xianjun Jiao, and Ingrid Moerman. "A Baseband Wireless Spectrum Hypervisor for Multiplexing Concurrent OFDM Signals." Sensors 20, no. 4 (2020): 1101. http://dx.doi.org/10.3390/s20041101.

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The next generation of wireless and mobile networks will have to handle a significant increase in traffic load compared to the current ones. This situation calls for novel ways to increase the spectral efficiency. Therefore, in this paper, we propose a wireless spectrum hypervisor architecture that abstracts a radio frequency (RF) front-end into a configurable number of virtual RF front ends. The proposed architecture has the ability to enable flexible spectrum access in existing wireless and mobile networks, which is a challenging task due to the limited spectrum programmability, i.e., the ca

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Hao, Fang, Baoguo Yu, Xingli Gan, et al. "Unambiguous Acquisition/Tracking Technique Based on Sub-Correlation Functions for GNSS Sine-BOC Signals." Sensors 20, no. 2 (2020): 485. http://dx.doi.org/10.3390/s20020485.

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The autocorrelation function (ACF) of the Binary Offset Carrier modulation (BOC) signal for Global Navigation Satellite System (GNSS) has multiple peaks, ambiguity is easily generated during the synchronization of the baseband signal. Some methods have been proposed to remove the ambiguity, but the performance is not suitable for high-order BOC signals or does not maintain narrow correlation characteristics. This paper proposes a sub-function reconstruction synchronization algorithm to solve this problem, of which the key is to design a new local auxiliary code: the local Pseudo-Random Noise (

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Pham, Tien-Thang, Xianbin Yu, Lars Dittmann, and Idelfonso Tafur Monroy. "Integration of Optically Generated Impulse Radio UWB Signals Into Baseband WDM-PON." IEEE Photonics Technology Letters 23, no. 8 (2011): 474–76. http://dx.doi.org/10.1109/lpt.2011.2109943.

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Parajuli, Hum Nath, and Eszter Udvary. "Wired-Wireless Converged Passive Optical Network with 4-PAM and Multi-sub-bands FBMC." Infocommunications journal, no. 2 (2018): 1–6. http://dx.doi.org/10.36244/icj.2018.2.1.

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Future 5G based passive optical networks (PON) are expected as capable of the simultaneous provision of wired and wireless services for multi-users. In this paper, for the first time, we propose and demonstrate the simultaneous delivery of wired 4-pulse amplitude modulation (4-PAM) and wireless multi-sub-bands filter bank multicarrier (FBMC) signals in one wavelength using one laser source for the future 5G PON. The 4-PAM can be used in cost-efficient intensity modulation direct detection (IM/DD) systems and it provides the double bandwidth efficiency compared to conventional on-off keying (OO

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Tseitlin, Mark, Zhelin Yu, Richard W. Quine, George A. Rinard, Sandra S. Eaton, and Gareth R. Eaton. "Digitally generated excitation and near-baseband quadrature detection of rapid scan EPR signals." Journal of Magnetic Resonance 249 (December 2014): 126–34. http://dx.doi.org/10.1016/j.jmr.2014.10.011.

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Javidi, Giti, and Ehsan Sheybani. "Application of Digital Signal Processing in USRP Satellite Signal Detection." International Journal of Interdisciplinary Telecommunications and Networking 9, no. 2 (2017): 16–25. http://dx.doi.org/10.4018/ijitn.2017040102.

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The Universal Software Radio Peripheral development technique is designing and implementing radio frequency based systems. The distinctiveness originates from the interchangeable daughterboard within the USRP. The system is designed around the Xilinx Vertex 3 FPGA chip. This means C++, Python, and VHDL can be used to program this device. The project consists of creating a receiver. The objective of the project is to research and comprehend the hardware functionalities of the USRP. The purpose is to create codes in C++ and Python to implement receiving capabilities of the device. The goal of th

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Lin, R., Z. Feng, M. Tang, et al. "Palm-shaped spectrum generation for dual-band millimeter wave and baseband signals over fiber." Optics Communications 367 (May 2016): 137–43. http://dx.doi.org/10.1016/j.optcom.2016.01.044.

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Kuharskaya, O. V., and E. Z. Savin. "Influence of Synchronization Signal Inaccuracy on DVB-T2 Local Content Insertion." Journal of the Russian Universities. Radioelectronics, no. 1 (April 17, 2018): 19–24. http://dx.doi.org/10.32603/1993-8985-2018-21-1-19-24.

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The article is aimed at specifying criteria of synchronization signal inaccuracy when DVB-T2 system local content re-placement cannot be carried out. Some settings of digital information stream are set as the initial data. The first part of the article specifies network delay calculation method. The second part of the article considers the signal cycle instability impact on estimation of local content device delay during its insertion in global information flow. Network delay saw-toothlike dependence on time is revealed, statistical parameters of synchronization signal instability are specifie

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Eneh, T., P. Rapajic, K. Anang, and Bello Lawal. "Adaptive MMSE Multiuser Detection in MIMO OFDM Wireless Communication System." Advanced Materials Research 367 (October 2011): 233–40. http://dx.doi.org/10.4028/www.scientific.net/amr.367.233.

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The combination of MIMO signal processing with OFDM is a solution to achieving high data rates for next generation wireless communication systems operating in frequency selective fading environments. To realize the extension of the MIMO with OFDM, a number of changes are required in the baseband signal processing. The developed adaptive Multiuser Detection in MIMO OFDM(AMUD) scheme performs better compared to non adaptive MIMO OFDM, at low Signal to noise ratio (SNR), it shows good performance in computational complexity, bit error rate (BER) and capacity. Simulation results show that the deve

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Torres-Company, Víctor, Idelfonso Tafur Monroy, Jesús Lancis, and Pedro Andrés. "All-fiber incoherent frequency-to-time mapping method for microwave signal generation with baseband transmission and multicasting support." Optics Communications 281, no. 15-16 (2008): 3965–68. http://dx.doi.org/10.1016/j.optcom.2008.04.021.

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Ortega, Lorenzo, Daniel Medina, Jordi Vilà-Valls, François Vincent, and Eric Chaumette. "Positioning Performance Limits of GNSS Meta-Signals and HO-BOC Signals." Sensors 20, no. 12 (2020): 3586. http://dx.doi.org/10.3390/s20123586.

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Global Navigation Satellite Systems (GNSS) are the main source of position, navigation, and timing (PNT) information and will be a key player in the next-generation intelligent transportation systems and safety-critical applications, but several limitations need to be overcome to meet the stringent performance requirements. One of the open issues is how to provide precise PNT solutions in harsh propagation environments. Under nominal conditions, the former is typically achieved by exploiting carrier phase information through precise positioning techniques, but these methods are very sensitive

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Olopade, A. O., and M. Helaoui. "Performance Analysis of a Six-Port Receiver in a WCDMA Communication System including a Multipath Fading Channel." Journal of Electrical and Computer Engineering 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/198261.

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Third generation communication systems require receivers with wide bandwidth of operation to support high transmission rates and are also reconfigurable to support various communication standards with different frequency bands. An ideal software defined radio (SDR) will be the absolute answer to this requirement but it is not achievable with the current level of technology. This paper proposes the use of a six-port receiver (SPR) front-end (FE) in a WCDMA communication system. A WCDMA end-to-end physical layer MATLAB demo which includes a multipath channel distortion block is used to determine

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Kestel, Claus, Stefan Weithoffer, and Norbert Wehn. "Polar Code decoder exploration framework." Advances in Radio Science 16 (September 4, 2018): 43–50. http://dx.doi.org/10.5194/ars-16-43-2018.

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Abstract. The increasing demand for fast wireless communications requires sophisticated baseband signal processing. One of the computational intense tasks here is advanced Forward Error Correction (FEC), especially the decoding. Finding efficient hardware implementations for sophisticated FEC decoding algorithms that fulfill throughput demands under strict implementation constraints is an active research topic due to increasing throughput, low latency, and high energy efficiency requirements. This paper focuses on the interesting class of Polar Codes that are currently a hot topic. We present

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Howard, Jeffrey N. "Communication and Sign Stealing in Baseball: Pitcher-Catcher “Hot-Key” Sign Indicator Obfuscation via Situational Game Data." International Journal of Sport Communication 10, no. 3 (2017): 281–89. http://dx.doi.org/10.1123/ijsc.2017-0064.

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The game of baseball and its internal cryptic communication system has always been vulnerable to sign stealing. By systematically studying the signals of an opponent so as to decrypt and intercept opponent communications, one can garner valuable insight into future events and strategies. Such “theft of signals” can lead teams to frequently change their sign indicator, should they suspect it has been compromised. The current paper presents a theoretical process of “hot” sign indicator obfuscation whereby the pitcher and catcher use unique hot indicator values that are generated after each pitch

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YANG, TAO, and LEON O. CHUA. "CHAOTIC IMPULSE RADIO: A NOVEL CHAOTIC SECURE COMMUNICATION SYSTEM." International Journal of Bifurcation and Chaos 10, no. 02 (2000): 345–57. http://dx.doi.org/10.1142/s0218127400000220.

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A chaotic impulse radio system is an ultrawide-band communication system that uses a train of very narrow baseband impulses as a carrier. In the transmitter of a chaotic impulse radio system, a message signal is modulated by two kinds of pulse carriers. Firstly, a frequency modulation is used to modulate the message signal into a subcarrier that functions as the clock pulses of a chaotic circuit. Driven by the modulated clock pulses, the chaotic circuit outputs a chaotic impulse positioning sequence which generates the positions of the carrier impulses. The specially designed chaotic circuit i

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Jiang, Wen-Jr, Chun-Ting Lin, Po-Tsung Shih, Li-Ying Wang He, Jyehong Chen, and Sien Chi. "Simultaneous Generation and Transmission of 60-GHz Wireless and Baseband Wireline Signals With Uplink Transmission Using an RSOA." IEEE Photonics Technology Letters 22, no. 15 (2010): 1099–101. http://dx.doi.org/10.1109/lpt.2010.2050466.

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Kuta, Stanisław, Wojciech Kołodziejski, and Jacek Jasielski. "Hybrid Linearized Class-BD Double Sided (LBDD) Digital Pulse Width Modulator (DPWM) for Class-BD Audio Amplifiers." Science, Technology and Innovation 1, no. 1 (2017): 1–10. http://dx.doi.org/10.5604/01.3001.0010.7555.

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The paper presents an original architecture and implementation of 9-bit LBDD hybrid DPWM circuit for Class-BD digital audio amplifier. The input PCM signals are directly transformed into 24-bit LBDD DPWM signals and then are requanized to the 9-bit digital outputs using noise-shaping process to support high fidelity with practical values of time resolution, and finally are converted by the DTCs into the two physical trains of 1-bit PWM signals. The architecture of the proposed Class-BD hybrid DPWM circuit is composed of two Class-AD ones. The hybrid quantizer converts 6 MSB bits using counter

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Chun-Ting Lin, Wei-Ren Peng, Peng-Chun Peng, et al. "Simultaneous Generation of Baseband and Radio Signals Using Only One Single-Electrode Mach–Zehnder Modulator With Enhanced Linearity." IEEE Photonics Technology Letters 18, no. 23 (2006): 2481–83. http://dx.doi.org/10.1109/lpt.2006.887233.

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Muggleton, Neil G., Chiao-Yun Chen, Ovid J. L. Tzeng, Daisy L. Hung, and Chi-Hung Juan. "Inhibitory Control and the Frontal Eye Fields." Journal of Cognitive Neuroscience 22, no. 12 (2010): 2804–12. http://dx.doi.org/10.1162/jocn.2010.21416.

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Inhibitory control mechanisms are important in a range of behaviors to prevent execution of motor acts which, having been planned, are no longer necessary. Ready examples of this can be seen in a range of sports, such as cricket and baseball, where the choice between execution or inhibition of a bat swing must be made in a brief time interval. The role of the FEFs, an area typically described in relation to eye movement functions but also involved in visual processes, was investigated in an inhibitory control task using transcranial magnetic stimulation (TMS). A stop signal task with manual re

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Tran, Vinh T., Nagaraj C. Shivaramaiah, Thuan D. Nguyen, Joon W. Cheong, Eamonn P. Glennon, and Andrew G. Dempster. "Generalised Theory on the Effects of Sampling Frequency on GNSS Code Tracking." Journal of Navigation 71, no. 2 (2017): 257–80. http://dx.doi.org/10.1017/s0373463317000741.

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Synchronisation of the received Pseudorandom (PRN) code and its locally generated replica is fundamental when estimating user position in Global Navigation Satellite System (GNSS) receivers. It has been observed through experiments that user position accuracy decreases if sampling frequency is an integer multiple of the nominal code rate. This paper provides an accuracy analysis based on the number of samples and the residual code phase of each code chip. The outcomes reveal that the distribution of residual code phases in the code phase range [0, 1/ns), where ns is the number of samples per c

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DANG, LE KHOA, HUU PHUONG NGUYEN, LE NGUYEN BINH, and DUC NHAN NGUYEN. "SIMULINK MODEL AND FPGA-BASED OFDM COMMUNICATION SYSTEM: A SIMULATION AND HARDWARE INTEGRATED PLATFORM." International Journal of Modeling, Simulation, and Scientific Computing 01, no. 03 (2010): 369–404. http://dx.doi.org/10.1142/s1793962310000250.

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Ultra-broadband networks are currently attracting significant interests in employing wireless access and optical fiber access to the home and to the building at symbol rate reaching Gb/s. OFDM is a multicarrier modulation technique and considered to offer significant reduction of the data symbol to be carried per carrier channel, especially in ultra-high speed optical communications with bit rate reaching 100 Gb/s or even higher. This paper thus presents a novel and generic OFDM system employing both MATLAB Simulink and FPGA-based development software platform for simulation as well as hardwar

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Yin, Liang, Ruonan Yang, and Yuliang Yao. "Channel Sounding and Scene Classification of Indoor 6G Millimeter Wave Channel Based on Machine Learning." Electronics 10, no. 7 (2021): 843. http://dx.doi.org/10.3390/electronics10070843.

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Millimeter wave, especially the high frequency millimeter wave near 100 GHz, is one of the key spectrum resources for the sixth generation (6G) mobile communication, which can be used for precise positioning, imaging and large capacity data transmission. Therefore, high frequency millimeter wave channel sounding is the first step to better understand 6G signal propagation. Because indoor wireless deployment is critical to 6G and different scenes classification can make future radio network optimization easy, we built a 6G indoor millimeter wave channel sounding system using just commercial ins

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Will, B., M. Gerding, S. Schultz, and B. Schiek. "Time domain reflectrometry measurements using a movable obstacle for the determination of dielectric profiles." Advances in Radio Science 6 (May 26, 2008): 1–4. http://dx.doi.org/10.5194/ars-6-1-2008.

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Abstract. Microwave techniques for the measurement of the permittivity of soils including the water content of soils and other materials, especially TDR (time domain reflectometry), have become accepted as routine measurement techniques. This summary deals with an advanced use of the TDR principle for the determination of the water content of soil along a probe. The basis of the advanced TDR technique is a waveguide, which is inserted into the soil for obtaining measurements of the effective soil permittivity, from which the water content is estimated, and an obstacle, which can mechanically b

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Rodriguez Vazquez, P., J. Grzyb, N. Sarmah, B. Heinemann, and U. R. Pfeiffer. "A 219–266 GHz LO-tunable direct-conversion IQ receiver module in a SiGe HBT technology." International Journal of Microwave and Wireless Technologies 10, no. 5-6 (2018): 587–95. http://dx.doi.org/10.1017/s1759078718000302.

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AbstractThis paper presents a fully-integrated direct-conversion fundamentally-operated mixer-first quadrature receiver module with a tunable LO in the 219–266 GHz band. It has been implemented in a 0.13-μm SiGe heterojunction bipolar transistor technology. It includes an on-chip LO path driven externally from the printed circuit board (PCB) connector level at 13.6–16.7 GHz. A hybrid coupler generates the quadrature LO signal, which drives a pair of double-balanced fundamentally-operated down-conversion mixers, whose RF ports are connected to a wideband lens-integrated on-chip ring antenna. Th

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"Chirp Signal Generator Based on Direct Digitalsynthesizer (Dds) for a Radar At 300 Ghz." International Journal of Innovative Technology and Exploring Engineering 8, no. 11S2 (2019): 54–60. http://dx.doi.org/10.35940/ijitee.k1010.09811s219.

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In the Modern day electronic fighting Systems the utilization of range has been broadened with a proficient way which makes the recognizable proof of the signal difficult. Modern radars use recurrence and stage tweaked signs to spread their range to enhance the handling gain. The way toward finding the balance arrangement of a perceived signal, the moderate development between signal distinguishing proof and demodulation, is an imperative task of a wise recipient, with various customary resident and military applications. Obviously, with no learning of the transmitted data and various cloud pa

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"Baseband Signal Generation for Multi-Function Phased Array Radar." International Journal of Recent Technology and Engineering 9, no. 1 (2020): 416–19. http://dx.doi.org/10.35940/ijrte.f9536.059120.

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The multi-function phased array radar (MPAR) is used for weather monitoring, air-traffic control requirements and non-cooperative elements monitoring in a parallel manner. The amplitude of the radio frequency signal is varied depending on the location of the target from the radar. The proposed work generates a signal which is used as a input for RF transmitter of Multifunction Phased Array Radar. To achieve this MPAR requirement, the in-phase and quadrature-phase samples are generated for a high data rate using MATLAB and then VHDL output was obtained from Xilinx for QPSK and QAM modulation te

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Mukherjee, Rahul, Khaleda Mallick, Paulomi Mandal, Gour Chandra Mandal, and Ardhendu Sekhar Patra. "Fourth-generation Bidirectional Wireless Hybrid Transmission System Employing Power-Doubler-Amplifier and Data Comparator." Journal of Optical Communications, August 1, 2019. http://dx.doi.org/10.1515/joc-2019-0072.

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AbstractAn innovative cost-effective fourth-generation bidirectional wireless hybrid transport system, employing optical add-drop multiplexing technique, power doubler amplifier and data comparator, is proposed and experimentally demonstrated. The proposed system can transmits, downlink 80 community antenna television (CATV) channels, two different wireless-over-fiber (WoF) data signals (1.5-Gbps/2.4-GHz, 2.5-Gbps/3.5-GHz) at two different base stations over 40 km and 80 km single-mode fiber (SMF), respectively, and an uplink 5-Gbps baseband (BB) signal at central station over 40 km SMF, using

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Raddo, Thiago R., Simon Rommel, Bruno Cimoli, et al. "Transition technologies towards 6G networks." EURASIP Journal on Wireless Communications and Networking 2021, no. 1 (2021). http://dx.doi.org/10.1186/s13638-021-01973-9.

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AbstractThe sixth generation (6G) mobile systems will create new markets, services, and industries making possible a plethora of new opportunities and solutions. Commercially successful rollouts will involve scaling enabling technologies, such as cloud radio access networks, virtualization, and artificial intelligence. This paper addresses the principal technologies in the transition towards next generation mobile networks. The convergence of 6G key-performance indicators along with evaluation methodologies and use cases are also addressed. Free-space optics, Terahertz systems, photonic integr

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Kou, Yanhong, and Huiwen Wu. "Model and implementation of pseudorange-bias-free linear channel." GPS Solutions 25, no. 2 (2021). http://dx.doi.org/10.1007/s10291-021-01093-3.

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AbstractThe nonideal characteristics of the entire channel of satellite navigation signals from generation, propagation to reception will cause signal distortions, resulting in pseudorange biases. Such kind of biases cannot be eliminated by differential technologies and has become a core error source in high-accuracy applications. We study the theoretical model and implementation method of a pseudorange-bias-free linear channel. The ideal channel transfer function equation under the unbiased pseudorange requirement is first derived from the equivalent baseband model. Based on two corresponding

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