Then after amplitude limiting, to be preamplified, demodulated, bandpass filtered, the doppler frequency shiftsignal is extracted.
经过限幅保护，接收放大，检波和带通滤波后，将多普勒频移信号提取出来。
2
In this paper, the frequency spectrum and the bandwidth of the frequency shiftsignal with continuous and discontinuous phase are analyzed.
分析了相位连续与不连续移频信号的频谱并比较了它们的带宽。
3
This paper has discussed the way of probing Doppler shiftsignal based on crossed phase detecting method in detail and introduced each function circuits briefly.