A framework for computationally efficient detection of frequency hopped signals in non-cooperative environment

We present framework of a channelized intercept receiver capable of detecting frequency hopped signals using a computationally efficient digital architecture. The signal is first digitized using a high speed, wide band, analog to digital convertor and all subsequent processing including channelization is done digitally. The channelized front end is designed using polyphase fast Fourier transform (FFT) technique which is highly efficient for separation and down conversion of equally spaced channels and hence suitable for the detection of frequency hopped signals. It also has a high degree of flexibility and can be reconfigured on the fly to intercept different frequency bands.