LTE中基于发送分集预编码的译码算法

Decoding algorithm of precoding for transmit diversity in LTE

主要研究了LTE系统中基于发射分集预编码的接收端译码算法。提出了在接收端采用的最大似然(ML)译码算法和最小均方误差(MMSE)译码算法,对这2种译码算法原理进行了分析,并对其性能进行了仿真和比较。仿真结果表明最大似然译码算法的性能比最小均方误差译码算法的性能要好,但LTE中基于空间复用的预编码在接收端可以采用最小均方误差算法进行译码,因此,如果接收端采用最小均方误差译码方案就可以对2种预编码方案进行译码,简化接收端译码的复杂度。

This paper studies the signal detection algorithm of precoding for transmit diversity in LTE system. The paper presents ML decode algorithm and MMSE decode algorithm and analyses the principle of these two algorithms. And their performance simulation and comparison were done. Simulation results show that the performance of ML algorithm is better than MMSE algorithm, but MMSE algorithm can he applied to preeoding for spatial multiplexing. So this preeoding scheme can be decoded by MMSE algorithm, which can reduce the complication of receiver.