Analysis of a Griffiths adaptive matched filter receiver

The authors report the results of a simulation that was conducted to analyze the performance of an adaptive matched filter that uses the Griffiths, or modified least-mean-square (LMS), algorithm. One possible use of a Griffiths filter could be in some type of surveillance system where the desired signal is unknown; thus, an LMS-type algorithm could not be implemented. The performance of the Griffiths filter was analyzed against various levels of delay distortion (self-jamming) and against a narrowband continuous-wave jammer. For the case of delay distortion, the simulation has shown that the performance of the Griffiths filter is directly related to the accuracy of the P-vector estimate. A poor P-vector estimate results in degraded performance. The authors discuss the system model, the algorithms, the adaptive filter model, the performance criteria, the simulation results, and the comparisons