Efficient compression of wavelet packet OFDM radar signals

Wavelet packet based OFDM radar signals have been recently introduced to achieve high range resolution in radar systems. As in single carrier phase coded radars, the conventional method for compression of these signals is based on using matched filter or direct computation of the autocorrelation function. In this paper, we introduce a new method for compression of these signals based on Discrete Wavelet Packet Transform (DWPT) that is mathematically equivalent to the matched filtering. The proposed structure is efficient for use in dual mode radar/communication systems and also is the base for having a multi-resolution radar which is a new concept in radar systems. Also this structure facilitates the estimation of phase and amplitude of different subcarriers frequencies. These data can be used in radar systems in various scenarios, especially for target recognition and appropriate power management in the tracking mode or using adaptive waveform design concept in radar systems.