Ieee Transactions on Communications, Accepted for Publication Design and Analysis of a Multi-carrier Differential Chaos Shift Keying Communication System
Ieee Transactions on Communications, Accepted for Publication Design and Analysis of a Multi-carrier Differential Chaos Shift Keying Communication System
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通讯作者：
Georges Kaddoum;Francois-Dominique Richardson;F. Gagnon
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作者：
Georges Kaddoum;Francois-Dominique Richardson;F. Gagnon
提出了一种新的多载波差分混沌键控(MC-DCSK)调制方式。该系统努力在稳健性、能量效率和高数据速率之间提供良好的折衷，同时与传统的多载波扩频系统相比仍然很简单。该系统可以被视为DCSK调制的并行扩展，其中一个混沌参考序列在预定义的副载波频率上传输。在剩余的副载波上传输多个调制数据流。这种发射机结构提高了传统DCSK系统的频谱效率，并且使用了更少的能量。接收器的设计使该系统易于实现，无需射频(RF)延迟电路来解调接收的数据。文中讨论了各种系统设计参数，包括子载波数、扩频系数和发射能量。在解释了设计之后，计算了MC-DCSK系统在多径瑞利衰落和加性高斯白噪声(AWGN)信道下的误码率性能，并与传统的DCSK系统进行了比较。仿真结果证实了这种新型混合设计的优越性。
—A new Multi-Carrier Differential Chaos Shift Key-ing (MC-DCSK) modulation is presented in this paper. The system endeavors to provide a good trade-off between robustness, energy efficiency and high data rate, while still being simple compared to conventional multi-carrier spread spectrum systems. This system can be seen as a parallel extension of the DCSK modulation where one chaotic reference sequence is transmitted over a predefined subcarrier frequency. Multiple modulated data streams are transmitted over the remaining subcarriers. This transmitter structure increases the spectral efficiency of the conventional DCSK system and uses less energy. The receiver design makes this system easy to implement where no radio frequency (RF) delay circuit is needed to demodulate received data. Various system design parameters are discussed throughout the paper, including the number of subcarriers, the spreading factor, and the transmitted energy. Once the design is explained, the bit error rate performance of the MC-DCSK system is computed and compared to the conventional DCSK system under multipath Rayleigh fading and an additive white Gaussian noise (AWGN) channels. Simulation results confirm the advantages of this new hybrid design.