| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a receiver for the time division multiplexing CDMA system for improving an error rate characteristic of demodulation data caused by a phase shift of a received signal due to a frequency offset. <P>SOLUTION: A 1-symbol delay circuit 10 and a phase difference detection circuit 11 detect a phase difference component "c" between symbols in each time slot of an inverse spread signal "a" of a received signal. A phase range rotation circuit 12 carries out processing of eliminating a modulation phase difference component to detect a phase shift amount "d" due to the frequency offset, and an averaging circuit 13 averages the phase shift amounts by each time slot to obtain a phase shift amount "e" by each time slot. A correction amount arithmetic section 14 generates a phase compensation amount "f" by each symbol by each time slot of the inverse spread signal "a" on the basis of the phase shift amount "e", and an AFC correction section 15 corrects a phase shift due to the frequency offset by each symbol of each time slot of the inverse spread signal "a" on the basis of the phase compensation amount "f". <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
