一种新型可变半径的球形译码算法

Novel sphere decoding algorithm with improved radius search

在MIMO系统的信号检测算法中,球形译码算法的性能最接近最大似然检测算法,但传统的球形译码算法复杂度较高。详细分析了球形译码算法原理的基础上对传统算法进行改进,提出了一种新型可变半径的球形译码算法。仿真结果表明,新算法可以在保持译码性能的同时有效地降低运算复杂度,从而更适合现代无线通信实时性的要求。

Among all of the signal detection algorithms in MIMO, the capability of the sphere decoding algorithm (SDA) is mostly close to the capability of the maximum-likehood decoding algorithm in respect of the bit error rate. But the calculation complexity of the conventional SDA is still large. To resolve this problem, in this paper we analyze the principle of the SDA and try to improve it. We develop a novel SDA with improved radius search. With the result of the simulation, it shows that the novel SDA not only can keep the same capability as the conventional SDA in the field of the bit error rate, but also effectively decrease the calculation complexity and satisfy the real-time requirement in the wireless communication better.