摘要
分析了W igner-hough变换(WHT)对线性调频信号的检测。通过对WHT输入信噪比和输出信噪比的计算,得出了当分析信号样本点数较大时,WHT可有效改善输出信噪比。仿真结果表明:当信噪比为-10 dB,采样点数从128提高到256时,可显著地提高输出信噪比。这一结果对于进一步开展低信噪比情况下线性调频信号的检测与处理具有重要意义。
The detection of multi -component LFM signals is analyzed based on Wigner- hough transform （WHT）. Through computing the relationship between input signal to noise ratio （SNR） and output signal to noise ratio, we concluded that WHT can enhance the output SNR when signal number is increased. Simulation results show that we can get a very good SNR improvement after changing the signal number from 128 to 256 even if SNR is - 10 dB. The result will be helpful for further studying of detection and processing of LFM signals under low SNR.
出处
《探测与控制学报》
CSCD
北大核心
2005年第5期19-21,25,共4页
Journal of Detection & Control
基金
国家自然科学基金资助项目(10474079)
