Microwave receiver configured to provide non-referenced distance

Details Microwave receiver configured to provide non-referenced distance Microwave receiver configured to provide non-referenced distance

1996-06-05

1998-11-03

Crosland, Donnie L.

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

455134, 455139, 4551891, 455214, 4552262, 455209, 375330, 329304, 329346, H04B 1700

Patent

active

058323694

ABSTRACT:
A receiver configured to measure phase change (.DELTA..phi.) in a signal transmitted from a microwave signal source, such as a cell site for cellular telephones, the transmitted signal including a carrier signal (F.sub.1) added to a modulation signal (F.sub.MOD), the receiver providing the phase change measurement (.DELTA..phi.) without further reference to the modulation signal (F.sub.MOD). Utilizing (.DELTA..phi.), distance from the transmitter can be calculated. The receiver includes one or more mixers for receiving the transmitted signal from the cell site and downconverting relative to an intermediate frequency signal (F.sub.IF) to produce an IF mixed signal including a sum IF mixed signal (F.sub.IF +F.sub.MOD) and a difference IF mixed signal (F.sub.IF -F.sub.MOD). The receiver then further includes components to demodulate the IF mixed signal to provide the modulated signal (F.sub.MOD) and the phase change measurement (.DELTA..phi.) with tracking of the intermediate frequency signal (F.sub.IF). A relative signal magnitude can further be provided from measurement of the sum or difference IF mixed signals.

REFERENCES:
patent: 3040315 (1962-06-01), Kramer
patent: 4388726 (1983-06-01), Dehaene
patent: 4599743 (1986-07-01), Reed
patent: 5034695 (1991-07-01), Owen
patent: 5280637 (1994-01-01), Larosa et al.
patent: 5325403 (1994-06-01), Siwiak et al.
patent: 5537680 (1996-07-01), Bruno

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