Interference cancellation using power-inversion adaptive array and LMS adaptive equalizer

摘要

In an interference canceller including a pair of diversity branches, the output signals of the diversity branches are normalized respectively by first and second AGC amplifiers whose outputs are then weighted by first and second coefficients, respectively, in first and second multipliers and combined together in a diversity combiner. The first and second coefficients are derived by normalizing the output of the diversity combiner and taking the correlations between it and the outputs of the first and second AGC amplifiers. The outputs of the first and second multipliers are weighted by third and fourth coefficients, respectively. The difference between the output signals of the third and fourth multipliers is detected by a subtractor and applied to a least mean square adaptive equalizer for adaptively equalizing the difference and deriving therefrom a decision error. The third and fourth coefficients are derived by taking the correlations between the decision error and the output signals of the first and second multipliers .