低复杂度PDCCH盲检测算法  

Low complexity PDCCH blind detection algorithm

作　　者：周游[1] 胡捍英[1] 陈国军[1] 

机构地区：[1]解放军信息工程大学信息系统工程学院,郑州450002

出　　处：《计算机应用研究》2013年第10期3084-3087,3090,共5页Application Research of Computers

基　　金：国家科技重大专项基金资助项目(2011ZX03003-003-02);国家高技术研究发展计划基金资助项目(2009AA011504)

摘　　要：针对LTE系统中PDCCH传统盲检测平均计算量大的问题,提出一种低复杂度的PDCCH盲检测算法。该算法通过频谱感知从原始集合中剔除无效PDCCH以缩小PDCCH盲检测范围,并利用PDCCH编码特点重新排列剩余的PDCCH盲检测顺序,从而减少PDCCH平均检测次数。对算法频谱感知的判决门限进行了理论推导,并给出了盲检测顺序重排的方法。仿真验证了理论推导的正确性,与传统PDCCH盲检测方法相比,该算法能够有效减少盲检测的平均检测次数。This paper proposed a low complexity PDCCH blind detection algorithm to reduce the complexity of the traditional method in the LTE system. The algorithm removed the invalid PDCCHs from the original collection to reduce the detection scope via spectrum sensing method, and rearranged the detection order of the remaining PDCCHs exploiting its coding charac- teristic, which decreased the average times of PDCCH blind detection. It deduced spectrum sensing decision threshold theoret- ically, and also gave the method of rearranging blind detection order. Simulations show that the correctness of the theoretical deduction and the algorithm can effectively reduce the average times of PDCCH blind detection compared to that of traditional

关 键 词：长期演进 物理下行控制信道 盲检测 频谱感知 排序 

分 类 号：TN929.5[电子电信—通信与信息系统]