| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a matched filter capable of reducing the number of multipliers for inverse diffusion processing and the number of adders for integration processing to reduce a circuit size sharply by solving the problem wherein the circuit size increases since the number of taps becomes large in a conventional matched filter. <P>SOLUTION: The matched filter includes: dual-port RAMs 1, 2 performing division into 128 groups consisting of 32 samples for reading collectively and successively at speed higher than write speed for each group for each in-phase/orthogonal component; a bit division section 3 for dividing data read for each group into 32 samples for simultaneous output; 32 inverse diffusion integration processing circuits 40, 50 outputting an integrated value for each block by performing the inverse diffusion of each sample successively for integration with 16 samples inputted successively from 16 groups as one block; and an integration section for integrating an absolute value for each block for outputting correlation value data from the output of the inverse diffusion integration circuit of the in-phase/orthogonal component. <P>COPYRIGHT: (C)2009,JPO&INPIT |
