加权分数傅立叶变换通信系统抗参数扫描及星座分裂性能分析  

The Secure Communication System Based on Single/Multi-Parameter Weighted-Type Fractional Fourier Transform

作　　者：梅林[1] 沙学军[1] 张乃通[1] 

机构地区：[1]哈尔滨工业大学通信技术研究所,黑龙江哈尔滨150080

出　　处：《云南民族大学学报（自然科学版）》2011年第5期361-366,共6页Journal of Yunnan Minzu University:Natural Sciences Edition

基　　金：国家重点基础研究发展规划(2007CB310606)

摘　　要：针对现有基于加权类分数傅立叶变换系统的信号特征,以衡量单参数WFRFT信号抗参数扫描特性为目的,给出了非目的接收机存在变换参数误差条件下的等效信噪比.在单参数WFRFT系统的基础上,类比多径信道下的单载波信号星座图特征,研究了多参数WFRFT的信号的星座分裂特性.多参数WFRFT系统不但可以提高单参数系统抵抗参数扫描检测的能力,同时其具有的分裂调制星座图的特点还能有效隐藏原始调制方式.The paper presents the converting Signal to Noise Ratio of non-destination receivers for evaluating the ability of resistance against parameter detection of Single-Parameter Weighted-type Fractional Fourier Transform(WFRFT for short) when there is an error of transform parameter in the receiver.In order to improve the resistance capability of parameter detection,the schemes of Multi-Parameter could be adopted,which has a property of fission constellation that the original modulation scheme will be well concealed.The reasons of fission constellation in Multi-Parameter WFRFT are analyzed by analogy with that in the single carrier system over multi-path channels.

关 键 词：通信与信息系统 加权类分数傅立叶变换(WFRFT) 单参数WFRFT 多参数WFRFT 星座图分裂 

分 类 号：TP918[自动化与计算机技术]