Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
Patent
1995-06-06
1997-12-09
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
With wave collector
4552771, H04B 106
Patent
active
056970838
ABSTRACT:
A diversity receiver. Antennas are provided for respective branches. Each of the antennas generates a branch signal by receiving a radio signal through a radio signal path. The paths are different from each other. A reliability extraction circuit is provided to extract the reliability information of respective branch signals from them during an observation period. The observation period is set such that the radio signal paths appear to be equivalent to white noise Gaussian transmission paths, regardless of the occurrence of fading. Normally, the observation period is sufficiently shorter than a variance period of the branch signals due to the fading. After extracting the reliability information, weights for the respective branch signals are determined on the basis of the reliability information. The branch signals are linearly combined in accordance with the weights, and the signal thus obtained is output. As the reliability information, probability information are available. The probability information can be obtained on the basis of envelope levels or carrier power to noise power ratios of the branch signals.
REFERENCES:
patent: 4035729 (1977-07-01), Perry
patent: 4397036 (1983-08-01), Hirade et al.
patent: 5263180 (1993-11-01), Hirayama et al.
patent: 5297168 (1994-03-01), Sant'Agostino et al.
patent: 5349609 (1994-09-01), Tsujimoto
patent: 5513222 (1996-04-01), Iwasaki
patent: 5553102 (1996-09-01), Jasper et al.
"Fundamentals of Mobile Communications" supervised by Okumara, et al, edited by the Institute of Electronics, Information and Communication Engineers (IEICE), the third edition, Dec. 20, 1988, pp. 161-176.
Banks-Harold Marsha D.
Eisenzopf Reinhard J.
Mitsubishi Denki & Kabushiki Kaisha
LandOfFree
Diversity receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Diversity receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diversity receiver will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1617507