A low complexity reconfigurable channel filter based on decimation, interpolation and frequency response masking

The channel filters in multi-standard wireless communication receivers must be capable of extracting radio channels (frequency bands) of distinct bandwidths located at different center frequencies. In this paper we propose a method to realize low complexity reconfigurable channel filters based on decimation, interpolation and masking techniques. We show that our method provides approximately twice the number of channel filter frequency responses compared to the existing reconfigurable channel filter realization method. The resolution of center frequency locations of our channel filter responses is also twice that of the existing method. The enhancement in center frequency resolution and the increased number of channel filter frequency responses are obtained without any hardware overhead.