Pulse or digital communications – Receivers – Interference or noise reduction
Patent
1993-11-12
1996-01-02
Chin, Stephen
Pulse or digital communications
Receivers
Interference or noise reduction
455134, H04B 1702
Patent
active
054815711
ABSTRACT:
An RF circuit switch system having particular use in an antenna diversity scheme for a CDPD system relies upon a comparison between current signal values on a selected antenna and a predetermined value based upon previous signal values measured on the same antenna. This comparison determines whether switching will occur from one antenna to another. Normally, the predetermined value will be adjusted based upon present signal strength on the selected antenna. Switching is normally attempted when there is a drop of approximately 10 dB in the signal strength of the selected antenna. If the signal strength in the other antenna is found to be less than that of the original antenna upon switching, an automatic switch back is carried out.
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Predictive Antenna Selection Diversity (PASD) for TDMA Mobile Radio,--Proceedings of 1991 International Conference on Communications--ICC'91, Jun. 23-26, 1991.
Balachandran Kumar
Quick, Jr. Roy F.
Chin Stephen
May Timothy J.
Pacific Communication Sciences, Inc.
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