短波跳频系统信道的无源探测研究  

A study on the method of passive sounding of channels for short wave frequency-hopping system

作　　者：邹学玉[1] 甘良才[2] 

机构地区：[1]江汉石油学院电子与信息工程系,湖北荆州434102 [2]武汉大学物理与电子信息学院,湖北武汉430072

出　　处：《电波科学学报》2001年第4期538-542,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目 (6 9772 0 15 )

摘　　要：基于短波跳频 FH/QDPSK系统的 FFT解调 ,提出了对短波信道特征 -信号能量进行无源探测的方法 ,该方法利用在短波信道中的各频隙上检测到的信号能量分布来确定具有较高可通率的频段和频隙。根据数值模拟 ,给出了在信噪比为- 1 0 d BW～ 1 0 d BW、平均噪声功率为 - 3d BW～ 1 0 d BW时信号的平均检测概率和平均虚警概率曲线 。Based on the implement of FFT (fast Fourier transform) demodulator in FH/QDPSK System, this paper propose a method of passive sounding of short wave channel energy. This method can determinate which band and which band chip to have a good condition of built up communication link by using the detected signal energy on the each of bands and band chips. The average detection probability and false alarm probability have been gotten with simulation on this condition of SNR changed from -10dB to 10dB and average noise power changed from -3dBW to 10dBW. Those results and analyses can offer a better reference how to select a appropriate threshold criterion.

关 键 词：无源探测 短波通信 跳频通信 信息 

分 类 号：TN926.2[电子电信—通信与信息系统] TN914.41[电子电信—信息与通信工程]