Telecommunications – Transmitter and receiver at same station
Reexamination Certificate
2006-12-26
2006-12-26
Gelin, Jean (Department: 2617)
Telecommunications
Transmitter and receiver at same station
C455S259000, C455S075000, C455S209000, C455S255000
Reexamination Certificate
active
07155174
ABSTRACT:
A transceiver includes a Downstream Signal Processor (DSP), an Upstream Signal Processor (USP), a Local Oscillator (LO), a differencer, a reference signal generator, and an estimator. The DSP receives an initial downstream signal, a downstream LO signal from the LO, and from the estimator a frequency-offset estimate indicative of a free-running frequency offset included in the initial downstream signal. The DSP uses the LO signal and the estimate to frequency down-convert the initial downstream signal, and also to remove the frequency offset from the initial downstream signal, thereby producing a corrected downstream signal. The USP uses both an upstream LO signal from the LO and the estimate to frequency convert an initial upstream signal so as to produce a frequency pre-corrected upstream signal.
REFERENCES:
patent: 6603958 (2003-08-01), Gao et al.
patent: 6765879 (2004-07-01), Yamamoto et al.
patent: 0 684 708 (1995-11-01), None
patent: 0 726 662 (1996-08-01), None
patent: 0 969 636 (2000-01-01), None
patent: 2 347 285 (2000-08-01), None
European Search Report, issued by the European Patent Office, dated Feb. 6, 2003.
Broadcom Corporation
Gelin Jean
Huynh Nam
Sterne Kessler Goldstein & Fox PLLC
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