MIMO系统中球形译码算法的研究

Sphere decoding detection algorithm in MIMO system

针对多输入多输出(MIMO)通信系统中球形译码检测算法在较低信噪比和较高的调制阶数时复杂度仍然很高的问题,提出一种不影响检测性能同时又能大大降低其复杂度的方案。首先,对传统的球形译码算法进行研究;其次,介绍改进的球形译码算法;最后,通过仿真结果对其进行验证。

In the multi-input multi-output（MIMO） communication system, the complexity of sphere decoding algorithm is high when the signal-to-noise ratio is low and the modulation order is high. This paper proposes a new sphere decoding al- gorithm, which won＇ t affect the performance of the sphere decoding and reduces the complexity of sphere decoding. First- ly, we research the traditional sphere decoding algorithm. Then we present the imporved sphere decoding. According to the simulation, we verify the result.