We analyze low complexity frequency modulated continuous waveform (FMCW) radar algorithm for surveillance applications. To this end, we have implemented low complexity FMCW surveillance radar algorithm using dual chirps in [1]. However, in this system, only one frame of chirps is used for surveillance and thus it is insufficient to observe moving of targets. In this paper, by extending the number of frames of chirp, moving of targets can be observed well and it is shown by the experiment results.