基于功率分离接收机方案的低复杂度信号检测算法  

Low-complexity signal detection algorithm for the power splitting receiver scheme

作　　者：王艳艳 李启迪 唐小虎[1] WANG Yanyan;LI Qidi;TANG Xiaohu(School of Information Science and Technology,Southwest Jiaotong University,Chengdu 611756,China;CRSC Urban Rail Transit Technology Co.,Ltd.,Beijing 100070,China)

机构地区：[1]西南交通大学信息科学与技术学院,四川成都611756 [2]通号城市轨道交通技术有限公司,北京100070

出　　处：《通信学报》2024年第4期84-94,共11页Journal on Communications

基　　金：国家自然科学基金资助项目(No.62201476);四川省自然科学基金资助项目(No.2022NSFSC0910)。

摘　　要：为了解决基于分离接收机架构下的移动通信系统中信号检测复杂度较高的问题,提出一种低复杂度的信号检测算法。首先,考虑天线噪声、后级处理噪声和功率分离因子的影响,设计分离接收机架构,并基于三维接收信号建立简化的二维接收信号模型。然后,在变换坐标系下表征二维接收信号的联合概率密度函数,进而提出基于最小距离的低复杂度的信号检测算法。最后,分析分离接收机方案相对于传统相干接收机的联合处理增益。理论分析表明,相比于传统的基于三维接收信号的检测算法,所提信号检测算法具有较低的计算复杂度。仿真结果表明,在一定的功率分离因子下,低复杂度信号检测所获得的近似误符号率(SER)与最优的SER性能接近,且分离接收机架构下的SER性能优于传统的相干接收机方案。To address the issue of high signal detection complexity in mobile communication systems based on the splitting receiver architecture,a low-complexity signal detection algorithm was proposed.Firstly,considering the influence of antenna noise,post-processing noises,and power splitting factor,a splitting receiver architecture was designed,and a simplified two-dimensional received signal model was further established.Then,by characterizing the joint probability density function of the two-dimensional received signal in the transformed coordinate system,a low complexity signal detection algorithm based on the minimum distance was achieved.Finally,compared to the conventional coherent receiver,the joint processing gain of the splitting receiver scheme was analyzed.Theoretical analysis demonstrates that the proposed signal detection algorithm has lower computational complexity compared to the traditional signal detection schemes based on three-dimensional received signals.Simulation results show that the approximation SER achieved by the low-complexity signal detection is very close to that of the accurate SER at a certain power splitting ratio.Also,the splitting receiver can achieve an improved SER performance compared to the conventional coherent receiver.

关 键 词：分离接收机 信号检测 相干接收机 功率分配 

分 类 号：TN929.5[电子电信—通信与信息系统]