异步卫星协同通信系统中的双采样差分空时编码方案

doi:10.11959/j.issn.1000-0801.2017309

Abstract

Abstract:

Focusing on asynchronization in relay communication system over satellite fading channels,a dual-sampling differential space-time orthogonal frequency division multiplex（D-OFDM2）coding scheme was proposed.The proposed scheme constructed a dual-sampling method at the receiver based on the D-OFDM coding with delay tolerance when the satellite channel condition was unknown.The method added another sample to the current main lobe interval and equal gain merge the two sampling results.Comparing with the traditional scheme when the fractional delay is present,the D-OFDM2 scheme can obtain higher signal-to-noise ratio than single sampling method,and improves the system error performance.

Key words: satellite communication, asynchronous cooperative communication, distributed differential space-time coding, dual-sampling

CLC Number:

TN927

Jianwu ZHANG,Hejiaqi TU. Dual-sample differential space-time coding scheme in asynchronous satellite cooperative communication system[J]. Telecommunications Science, 2017, 33(11): 9-16.

Figures/Tables 9

时隙	中继1	中继2
时隙1	$V_{1,1} [m] = A Z_{1,1} [m]$	$V_{2,1} = - A Z_{2,2}^{*} [{〈 - m 〉}_{N}]$
时隙2	$V_{1,2} [m] = A Z_{1, 2} [m]$	$V_{2,2} = A Z_{2,1}^{*} [{〈 - m 〉}_{N}]$

References 18

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