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DSP Prototype of a Chaos-Based Multi-User Communication System: Design and Performance Analysis

机译：基于混沌的多用户通信系统的DSP原型：设计和性能分析

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This paper presents the implementation of a multi-user chaos-based communication system in DSP (digital signal processor) technology. The system is based on the chaotic phase shift keying (CPSK) digital modulation scheme, where chaotic signals are used as the spreading sequences of a CDMA (code division multiple access) system. Using chaotic signals offers the advantages of increased security and higher system capacity compared with conventional sequences. The aim of this hardware implementation was to enable a comparison against analytical performance results for CPSK. The transceiver prototype was implemented on a 32-bit floating-point TigerSHARC DSP. Its bit error rate (BER) characteristics were measured in the presence of additive white Gaussian noise. The prototype achieves excellent BER performance, matching that of theoretical CPSK. The effects of the limited number precision of the hardware platform are thus negligible. However, due to the limited concurrency of DSP, the multi-user system only supports low data rates. Despite this, the prototype demonstrates that the CPSK scheme is a promising and viable CDMA option for the future.
机译：本文提出了在数字信号处理器（DSP）技术中基于多用户混沌的通信系统的实现。该系统基于混沌相移键控（CPSK）数字调制方案，其中混沌信号用作CDMA（码分多址）系统的扩展序列。与常规序列相比，使用混沌信号具有提高安全性和更高系统容量的优势。此硬件实现的目的是要与CPSK的分析性能结果进行比较。该收发器原型在32位浮点TigerSHARC DSP上实现。在存在加性高斯白噪声的情况下测量其误码率（BER）特性。该原型具有出色的BER性能，与理论CPSK相当。因此，可以忽略硬件平台的有限数量精度的影响。但是，由于DSP的并发性有限，因此多用户系统仅支持低数据速率。尽管如此，原型证明了CPSK方案对于未来来说是一种有前途且可行的CDMA选择。

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