Reception of differential binary phase shift keying signals with weight processing of sub-symbols in information transmission systems with frequency hopping spread spectrum.

Signals with frequency hopping spread spectrum (FHSS) have long been widely used in military radio communication systems (RCS) due to their frequency-energy characteristics. In such systems, the most important characteristic is noise immunity, i.e. the ability to ensure reliable transmission and reception of information under the influence of various types of organized intentional and unintentional interference. In this paper, we consider the case when the input of the receiver, in addition to the receiver's own noise, contains deliberate interference, which is considered noise interference. In this case, it is assumed that the interference covers only part of the operating frequencies of the radio communication system. The algorithm of optimal noncoherent signal reception with weight processing for making a decision about the transmitted symbol (bit) is in the focus of the paper. Static radio engineering methods, as well as Monte Carlo simulation, have been used to evaluate the noise immunity of receiving differential binary phase shift keying signals with FHSS when exposed to deliberate Partial-Band Interference. It is shown that the noise immunity of a radio communication system under conditions of destructive influence can be improved by using the intra-symbols FHSS mode with the proposed reception algorithm. With an increase in the signal-to-interference ratio, the noise immunity of information transmission increases significantly. The optimal strategy for dealing with Partial-Band Interference when the RCS is operating in the intra-symbols FHSS mode is to select the optimal multiplicity of symbol frequency diversity, which minimizes the probability of a bit error probability. The obtained dependencies are presented in order to compare and determine the effectiveness of the considered transmission mode with the proposed reception algorithm.

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Noise immunity of digital information transmission in a radio communication system by DQPSK signals with frequency hopping spread spectrum in the partial-band jamming noise.

Journal of Radio Electronics ◽

10.30898/1684-1719.2021.2.8 ◽

2021 ◽

Vol 2021 (2) ◽

Author(s):

A.A. Paramonov ◽

◽

Van Zung Hoang ◽

Keyword(s):

Spread Spectrum ◽

Communication System ◽

Communication Systems ◽

Noise Immunity ◽

Frequency Hopping ◽

Digital Information ◽

Radio Communication ◽

Large Signal ◽

Frequency Hopping Spread Spectrum ◽

Radio Communication System

The article deals with an algorithm for noncoherent reception of signals with Differential Quadrature Phase Shift Keying (DQPSK) using their weight processing for radio communication systems (RCS) with Frequency-hopping spread spectrum (FHSS) under Partial-band jamming noise (concentrated in the interference spectrum). Numerical calculations of bit/symbol error probability in the reception of DQPSK signals with a symbol-by-symbol frequency hopping are presented, as well as the results of modelling the considered reception algorithm for a radio communication system with an intra-symbol frequency hopping to study the noise immunity of receiving a DPQSK signal in the considered mode. It is shown that for not too large signal-to-jamming ratios when only a part of the operating frequencies is clogged by this noise, the noncoherent reception algorithm with weight processing provides higher noise immunity than the symbol-by-symbol frequency-hopping algorithm.

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Partial band jamming of multicarrier frequency hopping/binary phase shift keying receiver over a Rayleigh fading channel with imperfect channel estimation

IET Communications ◽

10.1049/iet-com.2009.0382 ◽

2010 ◽

Vol 4 (3) ◽

pp. 285 ◽

Cited By ~ 4

Author(s):

A.E. El-Mahdy

Keyword(s):

Phase Shift ◽

Channel Estimation ◽

Fading Channel ◽

Rayleigh Fading ◽

Frequency Hopping ◽

Phase Shift Keying ◽

Binary Phase ◽

Imperfect Channel Estimation ◽

Shift Keying ◽

Binary Phase Shift Keying

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Simulasi Direct Sequence Spread Spectrum (DSSS) Pada Modulasi Binary Phase Shift Keying (BPSK)

Spektral ◽

10.32722/spektral.v2i1.3706 ◽

2021 ◽

Vol 2 (1) ◽

Author(s):

Nabila Khansa Hartono ◽

Faradila Alvina Putri ◽

Fitri Elvira Ananda

Keyword(s):

Phase Shift ◽

Spread Spectrum ◽

Theoretical Concept ◽

Direct Sequence Spread Spectrum ◽

Direct Sequence ◽

Phase Shift Keying ◽

Binary Phase ◽

Shift Keying ◽

Binary Phase Shift Keying ◽

Bpsk Modulation

Spread spectrum is a data transmission technique that spreads out information spectrum energy signals in a frequency band that is much larger than the minimal spectrum. One of the spread spectrum techniques is Direct Sequence Spread Spectrum (DSSS). This research was built the simulation of DSSS on Binary Phase Shift Keying (BPSK) modulation using MATLAB software. The simulation results of this DSSS simulation are displaying information wave signals, PN codes, signals that have been added with PN codes, signals modulated with BPSK, modulation signals that have been added with AWGN noise, demodulation signals, DSSS output signals and BER vs SNR graphics on the channel AWGN. The simulator of DSSS on BPKS in this research have been running according to the DSSS signal order flow and theoretical concept. Keywords: AWGN, BPSK , DSSS, PN Code, PN Sequence

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Joint Radar-Communication Relying on Spread Spectrum: A Hybrid Chaotic Sequence Design

Wireless Communications and Mobile Computing ◽

10.1155/2020/8848172 ◽

2020 ◽

Vol 2020 ◽

pp. 1-22

Author(s):

Hao Ma ◽

Jun Wang ◽

Xin Sun ◽

TianWei Hou ◽

WenXin Jin

Keyword(s):

Phase Shift ◽

Spread Spectrum ◽

Transmission Rate ◽

Chaotic Sequence ◽

Phase Shift Keying ◽

Short Time Fourier Transform ◽

Shift Keying ◽

Short Time ◽

Binary Phase Shift Keying ◽

Novel Design

This paper investigates a novel design for joint radar-communication (JRC) waveform, which is capable of improving the network’s performance by solving the phase shift mutation of the Chirp-BPSK waveform. We aim for jointly designing chirp waveform and improving Binary Phase Shift Keying (BPSK), as well as the hybrid chaotic spread spectrum code (CSSC). As a benefit, the JRC waveform can be successfully decoded, and the accumulation of phase shift can be suppressed by hybrid CSSC. The detailed deduction on the short-time Fourier transform (STFT) of the JRC waveform is adopted to analyse the complicated AF characters. Our analytical results demonstrate that the proposed JRC signal has superior spectrum performance, ambiguity function (AF), and transmission rate than conventional Chirp and Chirp-BPSK waveform. Numerical results are provided to confirm that (i) the proposed waveform is capable of providing better communication and radar performance; (ii) the performance of AF is not affected by the transmission rate for the proposed waveform.

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