Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1996-11-04
1997-11-25
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342151, 342155, 4552772, G01S 302, G01S 312
Patent
active
056917295
ABSTRACT:
Where two or more antenna beams may receive signals from the same cellular communication system user, post-reception beam channel gain variations may obscure choice of the channel providing the strongest user signal. Thermal atmospheric noise, assumed to equally enter each beam, is utilized as a standard signal level in order to calibrate the relative gain factor for each channel. Thermal noise level is measured by use of a single common receiver (32) sequentially coupled to each channel (22-25) to listen for lowest signal levels during inactive intervals, over periods of time which may extend for hours. Lowest signal levels provide thresholds for each channel from which gain correction factors are developed. When a user signal is received in two channels, the gain correction factors are employed to select the channel providing the best signal, on a substantially real time basis. A long-term lowest signal level monitoring algorithm is described.
REFERENCES:
patent: 4991109 (1991-02-01), Crookshanks
patent: 5241316 (1993-08-01), Pringle
patent: 5245425 (1993-09-01), Klatt
patent: 5514865 (1996-05-01), O'Neil
Gutman John H.
Papson John C.
Blum Theodore M.
Hazeltine Corporation
Onders Edward A.
Robinson Kenneth P.
LandOfFree
Aperture-to-receiver gain equalization in multi-beam receiving s does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Aperture-to-receiver gain equalization in multi-beam receiving s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aperture-to-receiver gain equalization in multi-beam receiving s will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2110717