Pulse or digital communications – Systems using alternating or pulsating current – Antinoise or distortion
Patent
1994-11-23
1998-09-15
Chin, Wellington
Pulse or digital communications
Systems using alternating or pulsating current
Antinoise or distortion
375254, 375296, 375346, 375365, 370500, 455 63, H04B 1500
Patent
active
058090835
ABSTRACT:
A system and method for transmitting digital data over a wireless channel uses periodically-transmitted, differentially encoded pilot words to allow a receiver to rapidly synchronize with a transmitter. Each differentially encoded pilot word comprises at least two pilot symbols that are separated by a fixed difference. The receiver monitors differences between symbols to locate the differentially encoded pilot words, and to thereby become synchronized with the transmitter. Once the receiver becomes synchronized with the transmitter, the receiver uses the pilot symbols of the differentially encoded pilot words to perform channel estimation and compensation.
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AT&T Wireless Services Inc.
Chin Wellington
Corrielus Jean B
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