Design and Performance Analysis of Orthogonal Multi-User CD-DCSK Scheme

HE Lifang; DONG Jiangtao; ZHANG Gang

doi:10.11999/JEIT210263

Volume 44 Issue 5

May 2022

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HE Lifang, DONG Jiangtao, ZHANG Gang. Design and Performance Analysis of Orthogonal Multi-User CD-DCSK Scheme[J]. Journal of Electronics & Information Technology, 2022, 44(5): 1828-1838. doi: 10.11999/JEIT210263

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HE Lifang, DONG Jiangtao, ZHANG Gang. Design and Performance Analysis of Orthogonal Multi-User CD-DCSK Scheme[J]. Journal of Electronics & Information Technology, 2022, 44(5): 1828-1838. doi: 10.11999/JEIT210263

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Design and Performance Analysis of Orthogonal Multi-User CD-DCSK Scheme

doi: 10.11999/JEIT210263

Information Engineering College, Chongqing University of Posts and Telecommunications Communication Chongqing 400065, China

Funds: The National Natural Science Foundation of China (61771085), The Research Project of Chongqing Educational Commission (KJ1600407, KJQN201900601)

Received Date: 2021-03-30
Accepted Date: 2021-11-11
Rev Recd Date: 2021-11-11

Available Online: 2021-12-22

Publish Date: 2022-05-25

Abstract

Abstract

To improve further the information transmission rate and Bit Error Rate (BER) performance of existing multi-user chaos keying systems, an Orthogonal Multi-User Correlation Delay Differential Chaos Shift Keying (OMU-CD-DCSK) system is proposed in this paper. The system is based on DCSK combined with Correlation Delay Shift Keying (CDSK), which can transmit N bit multi-user information in each time slot using orthogonal Walsh code sequence, and then increase further the transmission rate by quadrature modulation technique. At the receiver, a moving average filter is used to reduce the noise variance and improve the BER performance, followed by correlation demodulation to recover the multi-user information bits. The theoretical BER of the system under multipath Rayleigh fading channel is derived, and verified by Monte Carlo simulation experiments. Furthermore, the integrated utility of the system is defined for evaluating the integrated performance of the chaotic system. Compare with other chaotic keying systems, the integrated performance of OMU-CD-DCSK has obvious advantages. Therefore, it is of great value in application.
- Multi-user chaotic keying system,
- Walsh code,
- Multipath Rayleigh fading channel,
- Integrated performance

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References(21)

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