PQMC-NRCDSK方案的设计与性能分析

doi:10.19665/j.issn1001-2400.2020.01.001

摘要/Abstract

摘要：

针对相关延迟键控方案信息速率低、误码性能差的问题,设计了一种相位正交多载波降噪相关延迟键控方案。该方案使用混沌序列与其时间延迟序列的叠加作为参考信号,同时混沌序列与其时间延迟序列分别与数据信息的乘积作为信息承载信号。参考信号和信息承载信号使用不同频率及相位正交的载波发送,并且在发送端和接收端使用多根天线来发送和获取信号。对该方案在多径衰落信道下的误码性能进行了详尽的研究,并进行了理论与实验验证。实验结果表明:理论分析与仿真结果相吻合。在相同载波数下,相位正交多载波降噪相关延迟键控方案的信息速率比多载波相关延迟键控方案和相关延迟键控方案的高,且为多载波相关延迟键控方案的两倍;另一方面,该方案的误码性能明显优于上述方案的。

关键词: 混沌系统, 非线性系统, 通信系统, 相关延迟键控, 多载波混沌键控

Abstract:

Aiming at the problems of a low information rate and the poor bit error performance of traditional chaotic keying schemes, a Phase Quadrature Multi-Carrier Noise Reduction Correlated Delay Shift Keying (PQMC-NRCDSK) scheme is proposed. In this scheme, the superposition of chaotic sequence and its time delay sequence is used as the reference signal, and the product of the chaotic sequence and its time delay sequence with data information is used as the information bearing signal. The reference signal and information bearing signal are transmitted by the carrier with different frequencies and quadrature phase, and multiple antennas are used to transmit and acquire signals at the sender and receiver, respectively. The error performance of this scheme in the multi-path fading channel is studied in detail and verified by theoretical analysis and experimental verification. Experimental results show that the theoretical analysis is consistent with the simulation results, and the correctness of the theoretical analysis is verified. The information rate of the PQMC-NRCDSK scheme is higher than that of the MC-CDSK and CDSK schemes under the same carrier number, and is twice as high as that of the MC-CDSK scheme. On the other hand, the error performance of the PQMC-NRCDSK scheme is obviously better than that of the above schemes.

Key words: chaos systems, nonlinear systems, communicaton system, correlated delay shift keying, multi-carrier chaos shift keying

中图分类号:

TN911.3

张刚,黄南飞,张天骐. PQMC-NRCDSK方案的设计与性能分析[J]. 西安电子科技大学学报, 2020, 47(1): 1-9.

ZHANG Gang,HUANG Nanfei,ZHANG Tianqi. Design and performance analysis of the PQMC-NRCDSK[J]. Journal of Xidian University, 2020, 47(1): 1-9.

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