一种快速估计二相编码信号参数的方法

Fast Estimation of BPSK Signal Parameters

由于二相编码信号的带宽与子脉冲带宽相近,利用信号的中心频率和带宽,可以获得类似于单个子脉冲的函数信号,该信号与二相编码信号作相关时,将分别出现极大值和极小值,这时的极小值反映了二相编码信号的相位跳变点;由于sinc函数的对称性,以上的过程相当于对二相编码信号进行频域加窗。利用这一特点,可以实现二相编码信号参数估计的快速算法,且算法简单有效,易于工程实现。仿真实验表明:在低信噪比情况下,算法可有效完成参数估计,其性能优于小波参数估计方法。

Because the bandwidth of the BPSK signal was close to the bandwidth of its sub-pulse,taking advantage of the bandwidth and the center frequency, a sine function similar to the sub-pulse could be designed. After the correlation of the sine function and BPSK, the maximums and minimums would be displayed, and the minimums were imaged the phase jumping dots of the BPSK. Due to the symmetry of the sine function, the processing hereinbefore was windowing to the BPSK in frequency domain. These would be a fast, simple and easy-to-realize algorithm, The simulation shows that the method can effectively complete the BPSK signal parameters estimation, and is superior to that using wavelet, under low signal-to-noise rate （SNR）,