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。
A system model for MIMO（Multiple Input Multiple Output） based on asynchronous transmission is proposed where different delay offsets are intentionally applied to the data streams of each transimitting antenna, and the signals of each antenna are transmitted and received asynchronously. A baseband signal model and a differen- tial detection scheme are presented. The proposed differential scheme solves the problems of differential detection and single antenna detection in V- BLAST（Vertical Bell Loboratory Layered Space- Time）. The simulation re- sults show that the BER（Bit Error Rate） perfonnance is different corresponding to different delay offsets.
出处
《电讯技术》
北大核心
2010年第7期55-59,共5页
Telecommunication Engineering
关键词
多入多出
异步发射
差分检测
频谱效率
multiple input multiple output（MIMO）
asynchronous transmission
differential detection
spectrum efficiency
