Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Patent
1997-11-12
2000-08-29
Vo, Nguyen
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
455 76, H04B 100
Patent
active
061120596
ABSTRACT:
An off-channel leakage power monitor implemented in a transceiver (100) dynamically measures adjacent and alternate channel leakage power produced by nonlinearities in a transmitter (110) power amplifier (116). A main local oscillator (124), offset voltage-controlled oscillator (122), and second local oscillator (170) are adjusted to obtain on-channel power, adjacent channel power, and alternate channel power measurements using a measurement calculator (185) implemented in a digital signal processor (180) or as a gate array in a receiver (140). Once the off-channel leakage power measurements have been obtained, any number of techniques can be used to extract increased efficiency from the power amplifier (116) while maintaining acceptable linearity under changing operating conditions.
REFERENCES:
patent: 5066923 (1991-11-01), Gailus et al.
patent: 5119040 (1992-06-01), Long et al.
patent: 5524285 (1996-06-01), Wray et al.
patent: 5574992 (1996-11-01), Cygan et al.
patent: 5732330 (1998-03-01), Anderson et al.
patent: 5890051 (1999-03-01), Schalang et al.
patent: 5907797 (1999-03-01), Hanatatsu et al.
Neuzil Clint Howard
Schwent Dale Gerard
Aoki Makoto
Chen Sylvia
Motorola Inc.
Vo Nguyen
LandOfFree
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