基于FPGA的随机衰落及硬件实时统计实现  

Random Fading and Hardware Real-Time Statistics Implementation Based on FPGA

作　　者：戴政 陈小敏[1] 廖志忠[2] 杨志强[1] 朱秋明[1] Dai Zheng;Chen Xiaomin;Liao Zhizhong;Yang Zhiqiang;Zhu Qiuming(Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;China Airborne Missile Academy,Luoyang 471009,China)

机构地区：[1]南京航空航天大学,南京211106 [2]中国空空导弹研究院,河南洛阳471009

出　　处：《航空兵器》2020年第2期71-76,共6页Aero Weaponry

基　　金：国家重大科学仪器设备开发专项(61631020);国家自然科学基金重点项目(61631020);江苏省物联网与控制技术重点实验室基金项目(NJ20160027)。

摘　　要：针对传统信道模型仅对多径衰落进行统计建模的问题,建立了路径损耗、阴影衰落、莱斯(Rice)衰落和瑞利(Rayleigh)衰落等多种信道衰落模型,提出并实现了一种基于现场可编程逻辑门阵列(Field-Programmable Gate Array,FPGA)的无线信道衰落实时模拟方法,该方法可精确复现瑞利、莱斯和阴影衰落等随机衰落。在此基础上,设计实现了一种硬件实时统计随机信号幅值分布的辅助方法。硬件实测结果表明,基于本文方法输出的信道衰落幅值分布、硬件实时统计结果均与理论分布吻合,有效验证了本文信道衰落模拟和硬件实时统计方法的有效性。因此,该方法可用于辅助模拟真实传播环境对无线信号的随机衰落影响。Aiming at the problem that the traditional statistical channel models only focus on multipath fading,a composite channel fading model including path loss,shadow fading,Rice fading and Rayleigh fading is established.Meanwhile,a real-time simulation method for wireless channel fading based on the field-programmable gate array(FPGA)is proposed,which can accurately reproduce random channel fading such as Rayleigh,Rice and shadow fading.On this basis,a new method for real-time statistical random signal amplitude distribution is designed and implemented.The hardware measured results show that the output amplitude distribution of channel fading and hardware real-time statistical results are consistent with the theoretical distribution,which validates the effectiveness of the channel fading simulation and the hardware real-time statistical method.Thus,it is very helpful to simulate the random fading effect of real propagation environment on wireless signal.

关 键 词：信道模型 FPGA 幅值分布 莱斯衰落 阴影衰落 

分 类 号：TN919[电子电信—通信与信息系统]