Two signal high dynamic range and high resolution wideband digital receiver using beat frequency

This paper describes how to build a wideband digital receiver using 2 FFTs with bit-reduced kernels and beat frequency resulting from the square of the sampled input data. It reduces the computation time, increases the instantaneous dynamic range, and improves the frequency resolution if compared with a typical fix point FFT approach. Without losing the generality, a 10 bit A/D converter, 2.56 GHz sampling rate, and 256 points of data processing are used for illustration of this approach. The Matlab simulations are used to compare the new approach with the approach using a 10-bit fix point FFT. The simulation results are tabulated.