结合子载波分群检测方法的组分天线MIMO-OFDM系统

摘要

结合OFDM子载波之间具有相关性与组分天线MIMO-OFDM系统的特点,提出一种新的信号检测方案.在接收端将全体OFDM子载波分群,对每一群里中心子载波上的信号采用组排序检测方法来进行检测,并获得一组检测参数,对于其他子载波上的信号则依照该检测参数进行计算相对简单的分组干扰抑制检测.该方案相比对全体子载波上的信号均采用组排序检测方法的竭尽检测方案能大大降低检测复杂度.仿真结果表明该方案对系统性能造成的影响非常小.%A new detection scheme was proposed by combining the advantages of subcarrier correlation and antenna-grouping based MIMO-OFDM system. The OFDM subcarriers were divided into several groups and the subcarriers bound into the same group shared the same detection parameters, which were obtained at the center subcarrier of that group. This feature can significantly reduce the detection complexity. The simulation results show that compared with exhaustive detection scheme, the proposed scheme can largely reduce the complexity with very small performance loss.