跳时短参考载波索引差分混沌移位键控通信方案

doi:10.11959/j.issn.1000-436x.2022060

Abstract

Abstract:

In order to effectively utilize the transmission power of the reference signals in carrier index differential chaos shift keying (CI-DCSK), a novel time hopping short reference carrier index differential chaos shift keying communication system was proposed.Firstly, the symbol time was divided into multiple time slots, one of which was selected to send short reference signals according to the reference index bits.Then, analytical bit error rate expressions over additive white Gaussian noise and multipath Rayleigh fading channels were derived.Simulation results verify that the proposed scheme has a significant improvement in spectral efficiency, system energy efficiency and bit error rate performance.

Key words: differential chaos shift keying, carrier index modulation, short reference, time hopping, spectral efficiency

CLC Number:

TN918

Hua YANG, Yu WANG, Siyuan XU, Guoping JIANG. Time hopping short reference carrier index differential chaos shift keying communication scheme[J]. Journal on Communications, 2022, 43(3): 113-123.

Figures/Tables 13

References 21

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参数	含义
M	系统的数据子载波总数
p	索引比特总数
p_ref	参考索引比特个数
p_inf	子载波索引比特个数
R	混沌序列长度
S	混沌序列复制次数
β	信息信号长度
x_v(t)	第v个符号周期内的混沌信号
y_v(t)	第v个符号周期内经过复制的重复混沌信号
s_v(t)	第v个符号周期内的发送信号

元件	TH SR-CI-DCSK	CI-DCSK
加法器	1	1
乘法器	2M+2	2M+1
索引映射器	1	1
极性转换器	1	1
脉冲成形滤波器	1	1
串并变换器S/P	1	1
混沌序列复制器	1	―
PPM调制器	1	―

元件	TH SR-CI-DCSK	CI-DCSK
乘法器	M+1	M+1
匹配滤波器	M+1	M+1
极性判决器	1	1
并串变换器P/S	1	1
采样器	1	1
存储模块	4	3
相关器	1	1
平均器	1	―

Time hopping short reference carrier index differential chaos shift keying communication scheme

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