Pulse or digital communications – Pulse code modulation – Correcting or reducing quantizing errors
Reexamination Certificate
2006-10-17
2006-10-17
Deppe, Betsy L. (Department: 2611)
Pulse or digital communications
Pulse code modulation
Correcting or reducing quantizing errors
C375S254000, C341S200000
Reexamination Certificate
active
07123659
ABSTRACT:
A digital reception apparatus includes a receiver that processes a received signal and a distortion corrector that corrects a non-linear distortion of the processed received signal, introduced by the receiver. The receiver may include an amplifier, a quadrature demodulator and/or a quantizer. The distortion corrector includes a distortion estimator that estimates the distortion and outputs a correcting signal based on an inverse distortion characteristic of the receiver, and a distortion compensator that multiplies the received signal and the correcting signal to remove the non-linear distortion from the received signal, to obtain a corrected received signal. The corrected signal is output to a demodulator, which performs demodulation processing on the corrected signal, and thereby obtains a demodulated signal.
REFERENCES:
patent: 4446464 (1984-05-01), LeGrand et al.
patent: 4746902 (1988-05-01), Tol et al.
patent: 4800574 (1989-01-01), Tanaka et al.
patent: 5301364 (1994-04-01), Arens et al.
patent: 5375255 (1994-12-01), Baier et al.
patent: 5594612 (1997-01-01), Henrion
patent: 6337885 (2002-01-01), Hellberg
patent: 6553084 (2003-04-01), Maru
patent: 6771719 (2004-08-01), Koyama et al.
patent: 2003/0086513 (2003-05-01), Ichihara
patent: 0378719 (1990-07-01), None
patent: 0395368 (1990-10-01), None
patent: 0482927 (1992-04-01), None
patent: 1133066 (2001-09-01), None
patent: 8-307281 (1996-11-01), None
English Language Abstract of EP 0378719.
P. Fines et al., “Fully digital M-ary PSK and M-ary QAM demodulators for land mobile satellite communications”, Electronics and Communication Engineering Journal, vol. 3, No. 6, pp. 291-298 (Dec. 1991).
English Language Abstract of JP 8-307281.
Abe Katsuaki
Msuya Job Cleopa
Orihashi Masayuki
Takabayashi Shinichiro
Deppe Betsy L.
Greenblum & Bernstein P.L.C.
Matsushita Electric - Industrial Co., Ltd.
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