Telecommunications – Transmitter – With feedback of modulated output signal
Patent
1996-12-17
1999-05-04
Le, Thanh Cong
Telecommunications
Transmitter
With feedback of modulated output signal
330129, H04B 104
Patent
active
059013460
ABSTRACT:
A compensated signal source (210, 220) utilizes baseband signals and a radio frequency carrier signal to generate a set of source output signals (226, 227) which are coupled to a particular circuit (230, 240, 250). The signal source (210, 220) is operable in a characterizing mode in which a test configuration is applied, and outputs from the signal source and the particular circuit measured to develop parameters representing imperfections within the signal source and within the particular circuit. The signal source (210, 220) is operable in a normal mode, in which compensation based on the measured parameters is applied to account for the imperfections. In a preferred embodiment, the particular circuit (230, 240, 250) and compensated signal source (210, 220) form part of an amplifier (200) that implements linear amplification using nonlinear components (LINC) techniques.
REFERENCES:
patent: 5105168 (1992-04-01), DaSilva
patent: 5264807 (1993-11-01), Okubo et al.
patent: 5287069 (1994-02-01), Okubo et al.
patent: 5339054 (1994-08-01), Taguchi
patent: 5423082 (1995-06-01), Cygan et al.
patent: 5574992 (1996-11-01), Cygan et al.
Sudstrom, L., "Automatic adjustment of gain and phase imbalances in LINC transmitters," Electronics Letters, vol. 31, No. 3, Feb. 2,1995, pp. 155-156.
Cox, D.C., "Linear Amplification with Nonlinear Components," Institute of Electrical and Electronics Engineers Transactions on Communications, Dec. 1974, pp. 1942-1945.
Hetzel, S.A., A. Bateman and J.P. McGeehan, "A LINC Transmitter," Institute of Electrical and Electronics Engineers, Inc., 1991, pp. 133-137.
Chan, Kam-yuen and Andrew Bateman, "Linear Modulators Based on RF Synthesis: Realization and Analysis," Institute of Electrical and Electronics Engineers, Inc., 1995, pp. 321-333.
Olson Scott A.
Stengel Robert E.
Cong Le Thanh
Fuller Andrew S.
Motorola Inc.
LandOfFree
Method and apparatus utilizing a compensated multiple output sig does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus utilizing a compensated multiple output sig, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus utilizing a compensated multiple output sig will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1877343