| 摘要: |
| 提出了一种异步发射信号的MIMO系统模型：在V-BLAST
系统各发射天线对应的数据流中人为添加时延，使得各发射天线的信号异步
发射、异步到达接收机。基于该系统模型，提出了一种差分检测方法，解决了传
统V-BLAST方法无法进行差分检测以及无法实现单天线检测的难题。仿真结果显示，该算法
在不同的相对时延情况下的误码率性能不同。 |
| 关键词: 多入多出 异步发射 差分检测 频谱效率 |
| DOI： |
|
| 基金项目: |
|
| A Differential Detection Scheme for MIMO Systems with Asynchronous Transmission |
| SUN De-fu |
| (Southwest Institute of Electronic Technology, Chengdu 610036,China) |
| Abstract: |
| A system model for MIMO（Multiple Input Multiple
Output） based on asynchronous transmiss
ion is proposed where different delay offsets are intentionally applied to the d
ata streams of each transimitting antenna, and the signals of each antenna are t
rans
mitted and received asynchronously. A baseband signal model and a differential d
etection scheme are presented. The proposed differential scheme solves the pro
blems of differential detection and single antenna detection in V-BLAST(Vertical
Bell Loboratory Layered Space-Time). The simulation r
esults show that the BER(Bit Error Rate) performance is different corresponding
to different delay offsets. |
| Key words: multiple input multiple output(MIMO) asynchronous tra
nsmission differential detection spectrum efficiency |
