Asynchronous cooperative transmission scheme using linear dispersion code  

作　　者：高明 Ge Jianhua Han Chunlei Chi Kaikai 

机构地区：[1]State Key Laboratory of Integrated Service Networks, Xidian University, Xi＇an 710071, P.R. China [2]Tohoku University, Sendai, 980-0871, Japan

出　　处：《High Technology Letters》2010年第2期138-142,共5页高技术通讯（英文版）

基　　金：Supported by the National High Technology Research and Development Program of China （ No. 2006AA01Z270）, the Programane of Introducing Talents of Discipline to University of China （No. B08038） and the Joint Funds of National Natural Science Foundation of China-Guangdong Province （No. U0635003）.

摘　　要：The cooperative diversity schemes can effectively create a virtual antenna array for path fading combating multiin wireless channels. However, a lot of cooperative diversity schemes require perfect synchronization which is, in practice, difficult and even impossible to be realized. In this paper, we propose an asynchronous cooperative diversity scheme based on the linear dispersion code （LDC）. By adding the zero padding （ZP） between linear dispersion codewords, our scheme mitigates the effect of asynchronism effectively. The length of ZP is decided by relative timing errors between different relays. Besides, an easy decoding method of our scheme is given in this paper by restructuring the stacked channel matrix.

关 键 词：linear dispersion code （LDC） asynchronization cooperative diversity zero padding （ZP） RELAY 

分 类 号：TN915.1[电子电信—通信与信息系统] P756.5[电子电信—信息与通信工程]