Chapter five highlighted on some applications of surface acoustic wave ( saw ) filters that have been used in mobile and wireless communications , we have explained two applications , binary phase - shift keying ( bpsk ) , and differential phase - shift keying ( dpsk ) , we also proposed an application to implement the cck codewords and the cck demodulation using saw matched filter 第五章研究了聲表面波濾波器在移動通信、無線通信中的應用,主要介紹了三種應用:二進制相移鍵控( bpsk ) 、差分相移鍵控( dpsk ) ,以及用saw匹配濾波器實現cck調制和解調。