Power amplifying device with linear corrector

Details Power amplifying device with linear corrector Power amplifying device with linear corrector

2011-08-16

2011-08-16

Choe, Henry K (Department: 2817)

Amplifiers

Hum or noise or distortion bucking introduced into signal...

C375S297000

Reexamination Certificate

active

07999614

ABSTRACT:
A power amplifying device with linear corrector utilizing the polynomial format to realize pre-distortion is disclosed. Its effective order estimation technique for polynomial based pre-distorter includes the following steps. Firstly, it receives the polynomial of the described pre-distorter and then, the polynomial is transformed into the matrix expression, obtaining the pre-distorter consisted of K pre-distortion functions, where K denotes the maximum order of the described polynomials. Secondly, singular value decomposition is performed for the pre-distortion matrix, obtaining singular value matrix. Thirdly, on the basis of the singular value matrix, effective rank of the pre-distortion matrix is obtained. Such effective rank of the pre-distortion matrix is determined as the effective order of the polynomial. This invention improves not only the pre-distortion performance but also lower the computational complexity of the power amplifier pre-distorter based on polynomials, which further guarantees the convergence speed and the stability of power amplifier pre-distorter based on polynomials.

REFERENCES:
patent: 7366252 (2008-04-01), Cova et al.
patent: 7577211 (2009-08-01), Braithwaite
patent: 7773692 (2010-08-01), Copeland et al.
patent: 7808315 (2010-10-01), Goodman et al.
Besbes, H. et al., A fast adaptive polynomial predistorter for power amplifiers, Global Telecommunications Conference, Globecom '01, IEEE vol. 1: Digital Object Identifier: 10.1109/GLOCOM.2001.965198, 2001, pp. 659-663.
Chang, L. et al., Analysis of amplitude and phase predistortion and polynomial-based predistortion in OFDM systems, Information, Communications & Signal Processing, 2007 6th International Conference, Digital Object Identifier: 10.1109/ICICS.2007.4449843, 2007, pp. 1-5.
Choi, S. et al., A direct learning structure for adaptive polynomial-based predistortion for power amplifier linearization, Vehicular Technology Conference, VTC2007-Spring, IEEE 65th Digital Object Identifier: 10.1109/VETECS.2007.372, 2007, pp. 1791-1795.

Affiliated with

Also associated with

Rating

Power amplifying device with linear corrector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Power amplifying device with linear corrector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power amplifying device with linear corrector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2743225