Abstract: In this paper, a receiving technique integrated radar and radar with countermeasure reconnaissance based on signal reconstruction is proposed to resolve the problem of different characteristics between radar and radar countermeasure reconnaissance receiver. First, the intermediate frequency bandwidth is split to several sub-bands by using complex-exponential modulated filter banks. Then a nonuniform dynamic channelization is realized by using the technique for spectrum sensing and signal reconstruction. Finally, the echo of radar and radiation of emitter can be received respectively by using the technique of nonuniform dynamic channelization. A method for designing a high-complexity prototype filter is introduced to satisfy the requirments of the integrated receiver such as instantaneous dynamic range, sensitivity，surveillance bandwidth and frequency resolution. Theoretical analysis and computer simulation have illustrated the validity of this integrated receiving technique.

Key words: Nonuniform filter banks, Dynamic channelization, InteGrated receive, Signal reconstruction