What are the applications of adaptive filters?

Hi..plz tell me Applications of Adaptive Filters..and also tell how com they r being used in Radars? can anyone suggest good book on Adaptive Filters? thanks in advance..

well there r many applications..its better if u study book on Adaptive Filters..download Adaptive Filter theory by Simon Haykin...

Good start for radar design would be Merrill Skolnik: Radar Handbook.

Bro plz upload the books wich u have recommended..thanks in advance