jgg     2007 27 (增刊):  87-90    ISSN: 0412-1961  CN: 21-1139/TG OPTIMAL DESIGN OF DIGITAL EXTRACTION FILTER WITH DSP Tan Yaoyin 1,2) ; Liao Chengwang 1,2) ; Deng Tao 1,2) ; Zhao Fenghua 1,2) ;Ding Wei 1,2) ; and Chen Weiming 1,2) 1) Institute of Seismology , CEA , Wuhan 4300712) Crustal Movement Laboratory , Wuhan 430071 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null