| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a diversity receiver capable of enhancing a reception quality improvement effect by reducing the effect of frequency selective fading even when the delay time of a delayed wave gets longer. <P>SOLUTION: Signals received by antennas 11 to 14 are converted into signals with frequencies proper to signal processing respectively by receivers 21 to 24. The resulting signals are subjected to analog / digital conversion and orthogonal demodulation and given to two kinds of digital filters (31, 32). Synthesizers 41, 42 thereafter apply maximum ratio synthesis or equi-gain synthesis to the signals of each antenna for the respective frequency bands. A coupler 50 receives a synthesis signal synthesized by the synthesizers 41, 42 and the coupler 50 obtains signal correlation between two adjacent synthesis signals. The signals are synthesized with matched phases on the basis of the obtained signal correlation. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
