5G无线技术多天线系统中最优LSD编码信号处理算法的设计与实现  

Design and implementation of optimal LSD coding signal processing algorithm in 5G wireless multi⁃antenna system

作　　者：赵倩[1] 陈杨军 ZHAO Qian;CHEN Yangjun(Xi’an Traffic Enginering Institute,Xi’an 710300,China)

机构地区：[1]西安交通工程学院,陕西西安710300

出　　处：《电子设计工程》2023年第19期25-29,35,共6页Electronic Design Engineering

摘　　要：5G无线通信系统需要一种最优的编码技术来实现高分集增益、低误码率和低检测复杂度。为了提高MIMO系统的分集性能,近年来发展了各种编码技术。在5G无线通信中,采用空时编码(STC)来满足大数据流处理的要求,因此对STC的正交性进行优化是非常重要的。文中设计了一种最优线性可扩展色散码(O-LSDC)方案。映射系数是线性求解的最优值估计,为了找到线性可扩展色散码(LSDC码)的最优解,基于标度系数定义了五种LSDC码,根据误码率和信噪比评估了LSDC码的性能。根据五种不同LSDC码的错误概率评估仿真结果,文中使用瑞利衰落MIMO系统模型对多天线系统进行了仿真。此外,在不同的蒙特卡罗迭代次数下,评估了所提出的LSDC对误码率性能的影响,绘制了多天线系统的性能图。在瑞利衰落信道下,采用M-PSK调制的O-LSDC提高了5G通信系统的误码率和信噪比性能。5G wireless communication system needs an optimal coding technology to achieve high diversity gain,low bit error rate and low detection complexity.In order to improve the diversity performance of MIMO systems,various coding techniques have been developed in recent years.In 5G wireless commun-ication,Space Time Coding(STC)is used to meet the requirements of big data stream processing,so it is very important to optimize the orthogonality of STC.In this paper,an Optimal Linear Scalable Dispersion Code(O-LSDC)scheme is designed.The mapping coefficient is the optimal value estimation of linear solution.In order to find the optimal solution of Linear Scalable Dispersion Code(LSDC),five LSDC codes are defined based on the scaling coefficient,and the performance of LSDC codes is evaluated according to the bit error rate and signal-to-noise ratio.According to the simulation results of error probability evaluation of five different LSDC codes,Rayleigh fading MIMO system model is used to simulate the multi-antenna system.In addition,the influence of the proposed LSDC on ber performance is evaluated under different Monte Carlo iterations,and the performance graph of the multi-antenna system is drawn.In Rayleigh fading channel,O-LSDC using M-PSK modulation improves the bit error rate and signal-to-noise ratio performance of 5G communication system.

关 键 词：MIMO系统 空时编码 线性可扩展色散码 5G无线通信 

分 类 号：TN923[电子电信—通信与信息系统]