Abstract:

This paper provides a further study on the performance of the likelihood ratio detector of Swerling 22222 targets in Rician clutter, derived in reference 3 .Combining the likelihood ratio detector for known clutter parameters -with the estimation of the clutter parameters, an adaptive CFAR detector structure is proposed. And its performance is investigated by using the Monte Carlo simulation and analytical method. Finaty, the use of the adaptive CFAR detector to improve the performance of zero-velocity channel of MTD radar is discussed. The improved zero-velocity channel not only has little increasement of the structure complexity, but also has an approximate CFAR performance and a better detection performance in Rician clutter.

Key words: signal detection, CFAR, radar, signal processing