A noise insensitive solution to an ambiguity problem in spectral estimation
Abstract
The instantaneous frequency measurement (IFM) receiver is capable of measuring the center frequency of single frequency pulses over a wide range (bandwidth) of center frequencies. Because of various constraints, the frequency resolution requirement results in long correlator delay times that reduce the single correlator bandwidth. A large bandwidth can be achieved only if two or more correlators are used. The problem of estimating frequency is then reduced to the simultaneous congruence problem of number theory. A design procedure is presented for solving the congruence problem for a given amount of noise protection, a stated frequency resolution, a minimum bandwidth, and a fixed level of precision (bits) in the IFM receiver.
 Publication:

IEEE Transactions on Aerospace Electronic Systems
 Pub Date:
 September 1989
 DOI:
 10.1109/7.42089
 Bibcode:
 1989ITAES..25..729M
 Keywords:

 Bandwidth;
 Frequency Measurement;
 Noise Reduction;
 Signal Processing;
 Spectral Methods;
 Delay Lines;
 Diophantine Equation;
 Communications and Radar