摘要
卫星通信信道的复杂时变特性,使基于椭圆球面波函数(Prolate Spheroidal Wave Function,PSWF)的正交调制信号脉冲组的正交性受到破坏,已有均衡方法未能充分利用多脉冲干扰中的有用信息,效果有限。针对该问题,结合信道均衡与多脉冲检测各自的优势,提出一种联合多脉冲检测的PSWF时域正交调制信号自适应均衡方法,利用多脉冲检测消除脉冲间干扰的能力,降低均衡模块的阶数及算法难度;同时,利用均衡模块对信道的部分补偿作用,为多脉冲检测改善信道环境。在相同信道条件下,所提方法获得同等量级误比特率所需信噪比较自适应判决反馈均衡算法降低约2 dB。
Due to the complex time-varying characteristics of satellite communication channel,the orthogonality of pulse group of prolate spheroidal wave function(PSWF)orthogonal modulation signal is destroyed.The existing equalization methods fail to make full use of the useful information in multi-pulse interference,and the equalization effect is limited.To solve this problem,by combining the advantages of channel equalization and multi-pulse detection,a blind adaptive equalization method of PSWF orthogonal modulation signal is proposed,which uses multi-pulse detection to eliminate inter-pulse interference,reduce the order of equalization module and the difficulty of algorithm.At the same time,the partial compensation effect of equalization module is used to improve the channel environment for multi-pulse detection.Under the same channel conditions,the signal-to-noise ratio of the proposed method required for the same bit error rate is about 2 dB lower than that of the adaptive decision feedback equalization algorithm.
作者
钟佩琳
胡昊
刘佳琪
刘传辉
ZHONG Peilin;HU Hao;LIU Jiaqi;LIU Chuanhui(College of Basic Sciences for Aviation,Naval Aviation University,Yantai 264001,China;Key Laboratory on Signal&Information Processing of Shandong Province,Naval Aviation University,Yantai 264001,China)
出处
《电讯技术》
北大核心
2021年第12期1503-1509,共7页
Telecommunication Engineering
基金
国家自然科学基金资助项目(6170012154)
山东省“泰山学者”建设工程专项经费资助项目(ts20081130)。
关键词
卫星通信
椭圆球面波函数
盲自适应均衡
多脉冲检测
satellite communication
prolate spheroidal wave function(PSWF)
blind adaptive equalization
multi-pulse detection
