Design of a Power-Efficient Low-Complexity Reconfigurable Non-maximally Decimated Filter Bank for High-Resolution Wideband Channels

Abstract

In this paper, two reconfigurable architectures based on frequency-response masking (FRM) and non-maximally decimated filter bank system are proposed. The proposed methods are suitable for sharp wideband channelizers. The basic FRM structure consists of an interpolated modal filter and its masking filters. In both the proposed methods, the masking filters are synthesized by means of reconfigurable non-maximally decimated polyphase filter bank system. The second proposed method also exploits the LTI property of the FRM filter. The methods are beneficial when the number of bandwidths to be realized is large. The effective reduction in the multipliers and adders helps in reducing the hardware size. Both the methods are found to reduce the number of operations per second and hence the power consumption, when compared to the existing methods.