摘要
为了获得最大信道容量,采用几何均值分解(GMD)将MIMO信道分解为若干相互独立且具有相同增益的并行子信道,从而使调制解调和编解码过程得到简化,在容量和差错率之间取得折中。将该方法与VBLAST接收机结合起来,在高信噪比下可以获得接近ML接收机的性能。为此,提出将GMD算法应用于STBC-VBLAST混合系统中VBLAST部分,仿真结果表明,该算法能够使混合系统的性能得以极大提高。
In order to gain maximum channel capability,the MIMO channel must be diagonalized via the GMD algorithm and become the different subchannels which take on the same channel transfer functions.This method has the process with modulating and demodulating,encoding and decoding to be simplified.And it can gain the good tradeoff between the capability and error rate.Combining the method with the VBLAST receiver,it can obtain the similar performance to the ML receiver at the higher SNR.Therefore,a new scheme which the GMD algorithm is applied to the STBC-VBLAST systems is proposed.It shows this algorithm can improve the composite system＇s performance by simulation.
出处
《电子信息对抗技术》
2010年第6期67-70,共4页
Electronic Information Warfare Technology
基金
国家自然科学基金(60971100)
陕西省自然科学基础研究项目(SJ08F10)
关键词
空时分组码
垂直分层空时码
几何均值分解
预编码
space-time block coding（STBC）
vertical bell labs layered space-time coding（V-BLAST）
geometric mean decomposition（GMD）
pre-coding
