MIMO接收端的ITS检测算法

his paper presents a low complexity detection scheme, called Iterative Tree Search (ITS) detection, which is applied to MIMO (Multiple Input Multiple Output) wireless communication systems. ZF, MMSE and MAP detection schemes are also presented in this paper, compared with the ITS scheme. The keypoint of this ITS scheme is to generate a iterative searching tree which is further searched with the aid of M algorithm. The advantage of this ITS scheme is that a good performance can be achieved only at the cost of low complexity，which is different from other detecting schemes. For high-order QAM modulation formats, the complexity of the ITS detector can be further reduced with the aid of a special type of bit-mapping called multi-level bit-mapping. The Matlab simulation results of the several detection schemes are presented in this paper.