Antenna beam boundary detector for preliminary handoff...

Details Antenna beam boundary detector for preliminary handoff... Antenna beam boundary detector for preliminary handoff...

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G01S 5/04 (2006.01) H01Q 1/22 (2006.01) H01Q 21/29 (2006.01) H04B 7/26 (2006.01) H04Q 7/36 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 1285030

ANTENNA BEAM BOUNDARY DETECTOR FOR PRELIMINARY HANDOFF DETERMINATION ABSTRACT OF THE DISCLOSURE An antenna beam boundary detector for a sectorized cellular system is disclosed. The difference in signal level received by a main directional antenna and a broad beamwidth antenna is determined by detecting a modulator signal locally impressed on the signal received by the broad beamwith antenna. The signal level difference factor is the directional antenna beam boundary when the two antennas are correlated. Interferometer effects are cancelled by detecting both amplitude and phase modulation of the locally impressed modulation.

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