Adaptive narrow band noise estimator/suppressor radio receiver

Details Adaptive narrow band noise estimator/suppressor radio receiver Adaptive narrow band noise estimator/suppressor radio receiver

1977-12-27

1980-01-29

Martin, John C.

325 42, H04B 110

Patent

active

041863496

ABSTRACT:
A radio receiver is disclosed which measures the statistics of an interfering narrow band noise signal and from these statistics generates a function which when mixed at baseband with a data signal combined with the narrow band noise reduces the interfering effect of the noise signal. The interference eliminating function is generated by processing signals representing an approximation of the data, the covariance of the narrow band noise interference, the noise figure for the receiver and the amplitude of the data signal. As the function is generated it is input to a mixer together with the combined narrow band noise and data signal. Iterated processing improves the estimation for the noise statistics thereby improving the approximation for the resulting data signal. This further enhances the solution for the noise elimination function thereby still further improving the desired data signal, thus creating a positive improving feedback loop.

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"Detection, Estimation, and Modulation Theory", Part 1, Van Trees, Wiley & Sons, 1968, p. 296.

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