Performance Analysis of Short Reference Multi-User Differential Chaos Shift Keying Communication System
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摘要:
短参考差分混沌移位键控(SR-DCSK)系统主要的缺陷是数据传输速率较低。为此，该文提出一种短参考多用户差分混沌移位键控(SR-MUDCSK) 通信方案。利用Walsh码的正交性传输多个用户的信息，有效提高了数据传输速率。在AWGN和多径Rayleigh衰落信道环境下，对其误码性能进行了理论分析，并进行了实验仿真。结果表明：该系统在传输速率方面有较大提升，且能量效率也得到了显著改善，因此其具有重要应用价值。
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关键词:
- 短参考多用户差分混沌移位键控通信系统 /
- 短参考差分混沌移位键控 /
- Walsh码 /
- 传输速率 /
- 误码率
Abstract:The major drawback of Short Reference Differential Chaos Shift Keying (SR-DCSK) system is the low data transmission rate. To solve the problem, a Short Reference Multi-User Differential Chaos Shift Keying (SR-MUDCSK) communication scheme is proposed. The orthogonality of Walsh code is used to transmit the information of multiple users, which effectively improves the data transmission rate. The theoretical Bit Error Rate (BER) performance is analyzed, and experimental simulation is carried out under AWGN and multipath Rayleigh fading channel environment, respectively. The results show that the system has a significant improvement in transmission rate, and the energy efficiency is also significantly improved. Therefore, it is of great value in application.
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表 1 几种系统的能量效率和数据传输速率
系统名称 能量效率(${E_\eta }$) 传输速率(${R_{\rm{B}}}$) DCSK ${1 / 2}$ ${1 / {2\beta }}$ SR-DCSK ${P / {(1 + P)}}$ ${1 / {(R + PR)}}$ SR-MUDCSK ${{PN} / {(1 + PN)}}$ ${N / {(R + PR)}}$ 
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