Using a wavelet basis for a spectrally tunable phased array

Conventional phased array radars traditionally use digital filters that are adaptive in frequency on receive and use a fixed transmit pattern to illuminate their targets. Unfortunately such an approach does not take into consideration the spatial diversity of targets and interference sources that the phased array observes as it is electronically pointed throughout its search area. We propose a methodology that uses a wavelet filter bank to selectively transmit and receive radiation that is directionally dependent on the phased array's pointing direction. Such an approach allows us to illuminate with and receive radiation from targets in a way that is frequency selective depending on the pointing direction of the array and also more efficiently detect targets due to the compact spectral model produced by the wavelet filter bank.