Distributed differential space-time coding for asynchronous two-way relaying networks with Nakagami-m fading

doi:10.1016/S1005-8885(14)60340-X

中国邮电高校学报(英文) ›› 2014, Vol. 21 ›› Issue (6): 17-23.doi: 10.1016/S1005-8885(14)60340-X

Distributed differential space-time coding for asynchronous two-way relaying networks with Nakagami-m fading

钱敏洁,金彦亮,武卓

上海大学

收稿日期:2014-05-30 修回日期:2014-09-22 出版日期:2014-12-31 发布日期:2014-12-31
通讯作者: 金彦亮 E-mail:jinyanliang@staff.shu.edu.cn

Distributed differential space-time coding for asynchronous two-way relaying networks with Nakagami-m fading

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Received:2014-05-30 Revised:2014-09-22 Online:2014-12-31 Published:2014-12-31

摘要/Abstract

摘要：

　A signal detection scheme was proposed for two-way relaying networks (TWRNs) using distributed differential space-time coding (DDSTC) under imperfect synchronization. Unlike most existing work perfect with synchronization assumed, a relative delay between the signals transmitted from both sources to the relay was considered. Since perfect channel state information (CSI) is difficult to be acquired in fast fading, the scenarios and computation complexity will be increased especially when there appear multiple relays, CSI is assumed unavailable at all nodes. Therefore, the article proposes a differential signal detection scheme based on estimating and cancelling the imperfect synchronization component in the received signal at the two source nodes, followed by a least square (LS) decoder. Simulations, using the Nakagami-m fading channel due to its versatile statistical distribution property, show that the proposed scheme for both source nodes are effective in suppressing the inter-symbol interference (ISI) caused by imperfect synchronization while neither the source nodes nor the relay nodes have any knowledge of CSI.

关键词: TWRNs, DDSTC, Nakagami-m fading, imperfect synchronization

Abstract: 　A signal detection scheme was proposed for two-way relaying networks (TWRNs) using distributed differential space-time coding (DDSTC) under imperfect synchronization. Unlike most existing work perfect with synchronization assumed, a relative delay between the signals transmitted from both sources to the relay was considered. Since perfect channel state information (CSI) is difficult to be acquired in fast fading, the scenarios and computation complexity will be increased especially when there appear multiple relays, CSI is assumed unavailable at all nodes. Therefore, the article proposes a differential signal detection scheme based on estimating and cancelling the imperfect synchronization component in the received signal at the two source nodes, followed by a least square (LS) decoder. Simulations, using the Nakagami-m fading channel due to its versatile statistical distribution property, show that the proposed scheme for both source nodes are effective in suppressing the inter-symbol interference (ISI) caused by imperfect synchronization while neither the source nodes nor the relay nodes have any knowledge of CSI.

Key words: TWRNs, DDSTC, Nakagami-m fading, imperfect synchronization

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Distributed differential space-time coding for asynchronous two-way relaying networks with Nakagami-m fading

Distributed differential space-time coding for asynchronous two-way relaying networks with Nakagami-m fading

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