改进的MIMO系统球译码检测算法  

Improved sphere decoding detecting algorithm for MIMO

作　　者：仵丹 邵朝[1] 

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121

出　　处：《传感器与微系统》2016年第8期123-126,共4页Transducer and Microsystem Technologies

基　　金：2014年国家"863"计划资助项目(2014AA01A705);研究生创新基金资助项目(ZL2013-40)

摘　　要：针对球译码检测算法的搜索半径影响着其算法复杂度的问题,提出一种改进算法。改进算法对球译码检测算法的搜索半径乘上一个常量压缩因子,且在每层搜索中削减噪声因子的影响。通过缩减搜索球半径、缩小搜索范围实现算法复杂度的降低。仿真结果显示:在信噪比低于10 d B时,改进算法比传统球译码检测算法计算复杂度平均降低18%左右,同时误码性能损失较小。Search radius of sphere decoding detection algorithm affects complexity of algorithm,an improved algorithm is proposed. The improved algorithm multiplies a constant compression factor on the search radius of the sphere decoding detection algorithm,and influence of noise factor is reduced in each layer. The complexity of the algorithm is reduced by cutting search radius of sphere and narrowing search range. Simulations results show that the new algorithm can effectively reduce calculation complexity by 18 % compared with the traditional sphere decoding detecting algorithm when signal to noise ratio（ SNR） is less than 10 d B and cause the performance loss of bit error rate is small.

关 键 词：多输入多输出系统 最大似然检测算法 球译码检测算法 改进算法 

分 类 号：TN929.5[电子电信—通信与信息系统]