OCDM系统抗衰落性能分析  

Anti-fading Performance Analysis of OCDM System

作　　者：詹涛 雷霞[1] ZHAN Tao;LEI Xia(National Key Laboratory of Science and Technology on Communications,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,四川成都611731

出　　处：《无线电通信技术》2023年第1期157-162,共6页Radio Communications Technology

基　　金：国家重点研发计划(2020YFB1806607)。

摘　　要：线性调频波(Chirp)指频率随时间线性变化的一类传输波形,正交线性调频复用(Orthogonal Chirp Division Multiplexing,OCDM)技术是近年来提出的一种新型多载波传输模式,该系统利用一组相互正交的线性调频波进行信号传输。分析了面向OCDM系统的收发机理,详细对比了该系统与传统OFDM和DFT-Precoded-OFDM等典型宽带传输系统在不同多径数目、不同多普勒扩展以及不同循环前缀(Cyclic Prefix,CP)长度下的传输性能,以充分验证和说明由于OCDM本质上在时频二维均有扩展效应,因而具备更鲁棒的抗多径和抗多普勒扩展的能力。Chirp refers to a kind of transmission waveform whose frequency changes linearly with time.Orthogonal Chirp Division Multiplexing(OCDM)is a new multi-carrier transmission system proposed in recent years,which uses a group of orthogonal chirp for signal transmission.This paper analyzes the transmitting and receiving mechanism of OCDM system.The transmission performance of OCDM is compared with that of other typical broadband transmission systems,such as traditional OFDM and DFT-Precoded-OFDM,under different multipath numbers,different Doppler spread and different lengths of Cyclic Prefix(CP),to fully confirm and illustrate that OCDM has a more robust anti-multipath and anti-Doppler spread ability due to its spreading effect in both time and frequency dimensions.

关 键 词：OCDM OFDM DFT-Precoded-OFDM 抗衰落能力 

分 类 号：TN919[电子电信—通信与信息系统]