SNR Efficient Approach for the Design of Hybrid Filter Bank A/D Converters
The future applications of cognitive radio require digitization systems being capable to perform a flexible conversion in terms of bandwidth and resolution without increasing unreasonably the power consumption. The digitization systems based on Hybrid Filter Banks A/D Converters (HFB-ADC) introduced in provide an attractive solution for achieving this purpose. One difficulty is to match the synthesis filters with the analysis filters in order to reconstruct a correct wide-band signal. Classical methods start from the analysis filter frequency responses knowledge. Some of them try to approach the Perfect Reconstruction equations. In that case, the minimized criterion is a Signal-to-Distortion Ratio (SDR).