低复杂度单载波时域均衡算法

doi:10.11959/j.issn.1000-436x.2024162

Abstract

Abstract:

Due to the constraints of the satellite communication systems, the receiver signal processing was carried out in the time domain, which made traditional channel equalization algorithms face the challenge of high-dimensional matrix inversion. Taking full advantage of the special structure of Toeplitz matrix and the idea of successive interference cancellation, a low-complexity single carrier time domain equalization algorithm was proposed to avoid high-dimensional matrix inversion, by converting the high-dimensional channel equalization system into multiple low-dimensional channel equalization systems and performing channel equalization successively. Simulation results show that compared with the traditional channel equalization algorithms, the proposed algorithm can achieve similar or better performance with lower complexity.

Key words: satellite communication, single carrier time domain equalization, Toeplitz matrix, successive interference cancellation, high-dimensional matrix inversion

CLC Number:

TN92

Shiwen HE, Peiwen GUAN, Chengzuo PENG, Xunzhe DENG, Zhenyu AN. Low-complexity single carrier time domain equalization algorithm[J]. Journal on Communications, 2024, 45(9): 170-182.

Figures/Tables 16

参数	参数值
上采样倍数 $U$	10
UW1、UW2和UW3符号数量	18、16和14
滤波器滚降系数	0.6
信噪比 $S N R$ /dB	$- 18 ~ - 2$
符号信噪比(E_s·N₀^-1)/dB	$- 8 ~ 8$
路径数 $L$	3
符号数量 $N s$	200
发送帧数	50 000

参数	参数值
卫星高度/km	600
波段（S波段）/Hz	2×10⁹
移动设备速度/(m·s^-1)	3
采样率/Hz	9.6×10⁵
信噪比 $S N R$ /dB	$- 14 ~ - 6$
符号信噪比(E_s·N₀^-1)/dB	$- 4 ~ 4$
路径数 $L$	3
发送帧数	5 000

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Low-complexity single carrier time domain equalization algorithm

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