Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
Reexamination Certificate
2005-03-29
2005-03-29
Nguyen, Duc M. (Department: 2685)
Telecommunications
Receiver or analog modulated signal frequency converter
With wave collector
C455S277200, C455S078000, C455S133000, C455S134000, C455S575700
Reexamination Certificate
active
06873835
ABSTRACT:
A method of selecting between first and second antennas in a quadrature amplitude modulation receiver having in-phase (I) and quadrature (Q) signal channels for demodulating signals received by the antennas, comprising the steps of imultaneously connecting the first antenna to the I channel to obtain a first output signal having a first amplitude, and the second antenna to the Q channel to obtain a second output signal having a second amplitude; measuring the first and second amplitude to obtain a greater amplitude for one on the antennas; and switching to said of the antennas having the greater amplitude for demodulating the received signals.
REFERENCES:
patent: 5715525 (1998-02-01), Tarusawa et al.
patent: 6032033 (2000-02-01), Morris et al.
patent: 6055422 (2000-04-01), Saitoh
patent: 20020004375 (2002-01-01), Spencer et al.
Kirschstein et al.
Nguyen Duc M.
Symbol Technologies Inc.
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