Cooperative Differential Space-Time Spreading for the Asynchronous Relay Aided CDMA Uplink Using Interference Rejection Spreading Code

被引：10
|
作者：
Sugiura, Shinya [1 ]
Chen, Sheng [1 ]
Hanzo, Lajos [1 ]
机构：
[1] Univ Southampton, Sch Elect & Comp Sci, Southampton SO17 1BJ, Hants, England
来源：
IEEE SIGNAL PROCESSING LETTERS | 2010年 / 17卷 / 02期
基金：
英国工程与自然科学研究理事会;
关键词：
Asynchronous cooperation; cooperative diversity; differential space-time spreading; loosely synchronized codes; NETWORKS; SYNCHRONIZATION; MODULATION;
D O I：
10.1109/LSP.2009.2034236
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This letter proposes a differential Space-Time Coding (STC) scheme designed for asynchronous cooperative networks, where neither channel estimation nor symbol-level synchronization is required at the cooperating nodes. More specifically, our system employs differential encoding during the broadcast phase and a Space-Time Spreading (STS)-based amplify-and-forward scheme during the cooperative phase in conjunction with interference rejection direct sequence spreading codes, namely Loosely Synchronized (LS) codes. Our simulation results demonstrate that the proposed Cooperative Differential STS (CDSTS) scheme is capable of combating the effects of asynchronous uplink transmissions without any channel state information.
引用
收藏
页码：113 / 116
页数：4
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