To fully utilize the character of the bioradar echo signal, autocorrelation analysis, spectral estimation methods and time-frequency analysis are presented in this paper. These methods are employed to deal with no one, single people and multi-people

especially on those radars running in a continuous scanning mode. In this paper,we introduce the design principle and structure of high-speed and adaptive mu1 t ichannel radar data recording system,which has been developed in our research