摘要
针对一种新型FSK/PSK混合调制信号的参数估计问题,提出了一种基于AR功率谱与短时傅里叶变换的参数估计算法。该算法能够将信号拆分为独立的Costas信号,进而估计出信号的调制参数。算法无须对信号进行平方预处理,不会降低信号的原有信噪比。仿真结果显示算法运算量小,参数估计精度高,接近克拉美-罗下限。
A parameter estimation algorithm is proposed based on the AR power spectrum and the Short Time Fourier Transform （STFT） for new FSK/PSK hybrid modulation signals. The hybrid sig- nals can be split into the independent Costas signals, and then the modulation parameters of the sig- nals are estimated. The original SNR of the signals can also be kept, even though the square prepro- eessing is not done. The simulation results indicate that the algorithm with small amount of calcula- tion and high estimation preeision is close to the Cramer-Rao lower bound.
出处
《雷达与对抗》
2013年第3期31-34,45,共5页
Radar & ECM
