| 摘要 |
<P>PROBLEM TO BE SOLVED: To demodulate a plurality of modulation signals which are transmitted from a plurality of antennas, with a high error ratio characteristic and a comparatively small circuit size. <P>SOLUTION: A reception device includes: a partial bit demodulation unit 550 for demodulating a partial bit among bits constituting one symbol of each modulation signal by using a detection method different from the likelihood detection; signal point reduction units 514, 516 for reducing the number of candidate signal points by using the partial bit demodulated; and a likelihood detection unit 518 for obtaining reception digital signals 322, 323 by performing most likelihood detection according to the Euclid distance between the reduced number of candidate signal points and the reception point. Thus, it is possible to obtain only some bits which hardly cause an error, by the partial bit demodulation unit 550 and obtaining the other bits by the likelihood detection unit 518, thereby effectively improving the error ratio characteristic with a comparatively small circuit size. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
