Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2006-08-22
2006-08-22
Kim, Kevin (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S148000
Reexamination Certificate
active
07095814
ABSTRACT:
An apparatus for very high performance space-time array reception processing using chip-level beamforming and fading rate adaptation is disclosed. The space-time array receiving system includes a plurality of digital beamforming networks for forming beams of signals by spatial-filtering the signals, to thereby generate spatial-filtered signals; a plurality of demodulating unit for demodulating the spatial-filtered signals to generate demodulated signals; correlating unit for estimating a fading channel signal based on pilot channel signals; Doppler frequency estimating unit for estimating Doppler frequency of the fading channel signal to generate Doppler frequency estimated values; correlation length selection unit for selecting a correlation length of the pilot channel signals based on the Doppler frequency estimated values; a plurality of reference signal generation unit for generating reference signals based on output signals from the correlating unit; and a plurality of weight vector estimating unit for generating weight vectors based on the reference signals and the signals and for providing the weight vector to the digital beamforming networks.
REFERENCES:
patent: 6115409 (2000-09-01), Upadhyay et al.
patent: 6134262 (2000-10-01), Kitade et al.
patent: 6249251 (2001-06-01), Chang et al.
patent: 6304750 (2001-10-01), Rashid-Farrokhi et al.
patent: 6598014 (2003-07-01), Rabideau et al.
patent: 6836507 (2004-12-01), Gifford et al.
patent: 1998-35858 (1997-07-01), None
patent: 1998-701743 (1998-06-01), None
Richard Bamler; Doppler Frequency Estimation and the Cramér-Rao Bound; IEEE Transactions on Geoscience and Remote Sensing, vol. 29, No. 3, May 1191, pp. 385-390.
Crestel, et al.; ADoppler Frequency Estimate Using the Instantaneous Frequency;1997 IEEE, DSP 97, pp. 777-780.
Ralph T. Compton, Jr.;An Adaptive Array in a spread-Spectrum Communication System;1978 IEEE; vol. 66, No. 3, Mar. 1978, pp. 289-298.
Kyeong Mun Geon
Park Jae Joon
Electronics and Telecommunications Research Institute
Kim Kevin
Mayer, Brown, Rowe and Maw LLP
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