Polarity-Based Detection Method of QPSK Sequences for M-ary Spread Spectrum OFDM Communications

Zhang, Zhenyu; Li, Guangwei; Xuan, Guixin; Zeng, Fanxin

doi:10.1109/icct50939.2020.9295745

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…In recent years, with the precision of hydroacoustic channel estimation [2]- [5], and the deepening understanding of hydroacoustic propagation laws [6]- [8], hydroacoustic communication has had a more considerable development in signal modulation, anti-channel fading and transceiver, etc., and new algorithms and optimizations are emerging [9]- [11]. Spread spectrum communication traditionally gets better signal interference resistance at the cost of transmission speed, while M-ary spread spectrum (MSS) can achieve a compromise between data rate and transmission quality [12]- [14]. Method based on recursive decoding proposed in this paper with pseudo-random gold sequence for spread spectrum modulation and Matching Pursuit (MP) [15], [16] method for channel estimation, combined with virtual time reversal mirror [17]- [19] for channel equalization.…”

Section: Introductionmentioning

confidence: 99%

Recursive Decoding Based Multi-channel M-ary Spread Spectrum Underwater Acoustic Communication

Wang

Gao

2023

J. Phys.: Conf. Ser.

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The spread spectrum communication method has strong anti-noise and anti-fading capability, but it also brings the problem of low information transmission efficiency. The paper proposes a multi-channel M-ary spread spectrum communication method, using a recursive decoding algorithm to reduce the communication bit error rate. In combination with the channel equalization technique based on the virtual time reversal mirror technique, the scheme improves the communication rate of spread spectrum communication. It is verified through computer simulation and sea trial data that the communication method can effectively reduce the mutual interference between different channel signals, which provides a new idea for the design of hydroacoustic spread spectrum communication scheme.

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Section: Introductionmentioning

confidence: 99%

Recursive Decoding Based Multi-channel M-ary Spread Spectrum Underwater Acoustic Communication

Wang

Gao

2023

J. Phys.: Conf. Ser.

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“…However, due to the advantages of spread spectrum signals, their detection is extremely difficult. Therefore, scholars have also proposed many methods based on the detection of spread spectrum signals [6]- [9].…”

Section: Introductionmentioning

confidence: 99%

A Novel Recognition Method for Direct Sequence Spread Spectrum (DSSS) Signals Based on Secondary Power Spectrum

2023

acss

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DSSS signal is a technical means used for spread spectrum communication. Due to its unique frequency characteristics, it has great anti-interference and multipath resistance capabilities, and has many advantages such as a wide spectrum, making it an important enabling technology for spread spectrum communication. However, the relevant characteristics of spread spectrum signals pose challenges in detecting spread spectrum signals from conventional signals. Based on this, this article selects a feature value based on quadratic power spectrum to distinguish between conventional signals and spread spectrum signals after binary phase shift keying (BPSK) modulation, and selects decision boundaries through a large number of training sets, and tests the model. The results show that the spread spectrum signal detection method based on the secondary power spectrum has good detection accuracy and performance, with a discrimination accuracy of 99.44% and 99.6% for the training and testing sets, respectively, verifying the feasibility of this detection method.

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Double-Subset Parallel Transmission for M-ary Spread Spectrum OFDM Communications

Xuan

Zhang

et al. 2021

2021 IEEE 21st International Conference on Communication Technology (ICCT)

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Polarity-Based Detection Method of QPSK Sequences for M-ary Spread Spectrum OFDM Communications

Cited by 4 publications

References 15 publications

Recursive Decoding Based Multi-channel M-ary Spread Spectrum Underwater Acoustic Communication

Recursive Decoding Based Multi-channel M-ary Spread Spectrum Underwater Acoustic Communication

A Novel Recognition Method for Direct Sequence Spread Spectrum (DSSS) Signals Based on Secondary Power Spectrum

Double-Subset Parallel Transmission for M-ary Spread Spectrum OFDM Communications

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