Abstract: An algorithm for estimating frequencies from the wide band is proposed. Along with the information provided by the auxiliary channel and the aliased frquencies estimated, we can solve the frequency ambiguity due to sub-Nyquist sampling which is usually adopted to estimate frequencies from the wide band. The method for the estimation of frequencies with sub-Nyquist sampling can reduce the complexity of the overall hardware. In order to reduce the computational burden of the proposed algorithm, a more simplified algorithm is deduced. Finally, simulation results verify the efficiency of this method.

Key words: wide-band, sub-Nyquist sampling frequency ambiguity, computational burden