| 摘要 |
PROBLEM TO BE SOLVED: To realize a canceller having satisfactory response. SOLUTION: A variable delay circuit 321, a variable phase shifter 322 and a variable attenuator 323 apply delay, phase shift and attenuation processing to a received IF(intermediate frequency) output of a receiver. A frequency analysis section 326 applies frequency analysis to the received signal, an arithmetic control section 324 applies fast-Fourier transformation tot the result and generates control signals for the delay, phase shift and attenuation processing from the result of frequency analysis by referencing a table generated in advance. Since gradual decrease/increase procedure for a control variable are not required and for other reasons, the response of a wraparound canceller 30 can be improved. The canceller 30 can cancel not only the wraparound components but also multipath components. |
