摘要
现有的预编码码本设计方法均导致了在信道量化时计算复杂度过高的问题。本文研究了Kerdock码本,这种码本由多个相互无偏基矩阵组成,这些基矩阵都只含有4个已知元素且都是归一化矩阵,并基于Kerdock码本的这种特殊结构给出了一种高效的实现方法。本文将在信道量化部分详细讲解这种实现的具体结构。这种结构有利于降低搜索复杂度,从仿真和计算结果可以看出采用这种结构的码本和量化器,能以很小的性能损失换来计算复杂度降低一半的优越性。
Current precoding codebook designs lead to large implementation complexity of the channel quantizer.We propose an immplementation base on the Kerdock codebook.We show that is an efficient immplementation of the channel quantizer.The proposed Kerdock codebook consists of multiple mutually unbiased unitary bases matrices with quaternary entries and the identity matrix.We propose to derive the precoding codebooks from this base codebook.As we show,the quaternary structure facilitates codeword search.Monte Carlo simulations are used to compare achievable rates and error rates for different codebooks.
出处
《电子测试》
2010年第3期12-15,76,共5页
Electronic Test
