A fast spectrum sensing front-end by using charge domain analog DFT & complex filter for cognitive radio application

In this paper, we proposed a spectrum sensing front-end, containing a tunable complex band-pass filter using Gm-C structures, samplers and a direct implementation of charge domain analog DFT. The proposed architecture scans the frequency range 400-720MHz (analog TV band), which contains 5MHz channels, in less than 5us and determine whether a channel is occupied or empty.

کلیدواژه ها:

Charge domain analog DFT ، Cognitive Radio ، Complex filter ، spectrum sensing