Pulse or digital communications – Spread spectrum
Reexamination Certificate
2006-07-11
2006-07-11
Fan, Chieh M. (Department: 2634)
Pulse or digital communications
Spread spectrum
C375S260000, C375S343000
Reexamination Certificate
active
07075967
ABSTRACT:
There is disclosed a transceiver for use in a base station of a fixed wireless network that communicates with a plurality of subscriber transceivers via time division duplex (TDD) channels. The transceiver comprises: 1) a receiver front-end for receiving data burst transmissions from the plurality of subscriber transceivers in an uplink portion of a TDD channel, wherein the receiver front-end demodulates the received data burst transmissions into a digital baseband signal in-phase (I) signal and a digital baseband quadrature (Q) signal; 2) a first frequency domain feedforward equalization filter for receiving the I signal; 3) a second frequency domain feedforward equalization filter for receiving the Q signal; 4) an adder for producing a combined symbol estimate sequence; 5) a slicer for receiving and quantizing the combined symbol estimate sequence; and 6) a time domain feedback filter for generating a symbol correction sequence.
REFERENCES:
patent: 5638371 (1997-06-01), Raychaudhuri et al.
patent: 5684791 (1997-11-01), Raychaudhuri et al.
patent: 5694424 (1997-12-01), Ariyavisitakul
patent: 5809086 (1998-09-01), Ariyavisitakul
patent: 5815529 (1998-09-01), Wang
patent: 5835526 (1998-11-01), Juntti
patent: 5991292 (1999-11-01), Focsaneanu et al.
patent: 5991308 (1999-11-01), Fuhrmann et al.
patent: 6144697 (2000-11-01), Gelfand et al.
patent: 6188873 (2001-02-01), Wickman et al.
patent: 6643321 (2003-11-01), Genossar et al.
patent: 6650624 (2003-11-01), Quigley et al.
patent: 6661857 (2003-12-01), Webster et al.
patent: 2002/0070796 (2002-06-01), Gay-Bellile et al.
patent: 2 302 777 (1997-01-01), None
patent: WO 97/09781 (1997-03-01), None
patent: WO 9804073 (1998-01-01), None
Webster, M.; “Frequency-Domain Techniques for the Cyclostationary Signals Encountered in Fractionally-Spaced Equalizers”; IEEE International Conference on Acoustic, Speech and Signal Processing; Publication date Mar. 23, 1992; XP000467291; pp. 705-708.
Golberg, S., et al.; “Joint Carrier Recovery and Data Equalization Using Frequency Domain Techniques”; European Signal Processing Conference; Publication date Mar. 18, 1990; XP000365920; pp. 1823-1826.
Ready, M., et al.; “Architecture Considerations for Frequency Domain Adaptive Equalizers”; Asilomar Conference on Signals, Systems and Computers, Oct. 30, 1989; XP000217207; pp. 687-691.
McKown Russell C.
Struhsaker Paul F.
Fan Chieh M.
File Erin M.
Raze Technologies, Inc.
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