结合STBC的VBLASTMIMO-OFDM系统研究  

Study on VBLAST MIMO-OFDM System Combining STB

作　　者：陈娟[1] 李平安[1] 

机构地区：[1]武汉理工大学信息工程学院,湖北武汉430070

出　　处：《武汉理工大学学报（信息与管理工程版）》2007年第12期66-69,共4页Journal of Wuhan University of Technology：Information & Management Engineering

基　　金：湖北省自然科学基金资助项目(2005ABA224)

摘　　要：结合分层空时(vertical bell layered space time,VBLAST)结构和空时块分组码(space time block code,STBC)的优点,提出了一种新的编码方法。在发射端对发射天线分组,每组独立进行空时编码和OFDM调制;在接收端,采用分组干扰抑制结合奇异值分解实现解码,降低了计算复杂度。相对于空时分层码而言,该方法在同样信噪比的条件下可以取得明显低的误码率;相对于空时分组码而言,该方法具有更高的频谱利用率和码速率。仿真采用SUI-3信道模型,仿真结果表明该方法的抗衰落性能明显优于VBLAST。A new space - time coding approach was proposed by combining the advantages of VBLAST （ Bell Layer Space Time） and STBC （Space Time Block Code）. The transmit antennas were divided into subgroups and each was encoded by individual STBC and OFDM modulation. For the receiver antennas, the group interference suppression measure was taken and a SVD （singular value decomposition） algorithm was employed for decoding. The new approach has a higher spectrum efficiency and code rate than that of STBC. Simulation resuits show that the ability to combat fading of the new approach is better than that of VBLAST - OFDM at the same spectrum efficiency under the SUI -3 channel model.

关 键 词：STBC VBLAST MIMO—OFDM 分组干扰抑制 SVD 

分 类 号：TN929.5[电子电信—通信与信息系统]