IIR DIGITAL FILTER, WRAPAROUND CANCELER AND REPEATING DEVICE

摘要

PROBLEM TO BE SOLVED: To realize an IIR digital filter having multiple number of taps at a high speed by a low delay. SOLUTION: The feedback circuit of the IIR digital filter includes an FIR digital filter of direct type constitution which can be processed by the low delay or an FIR digital filter of inverted constitution, and a multi-stage FIR digital filter of inverted constitution which can process at a high speed with the multiple number of the taps. The IIR digital filter having a high speed and a small calculating delay can be realized by constituting the feedback of the IRR digital filter. When a broadcasting wave is repeated, even if a multipath delay wave or a wraparound wave exists in the broadcasting wave, a canceling operation can be realized suitably by a wraparound canceler which is adapted to these cases. COPYRIGHT: (C)2004,JPO&NCIPI