Pulse or digital communications – Repeaters – Testing
Patent
1994-10-04
1997-08-19
Bocure, Tesfaldet
Pulse or digital communications
Repeaters
Testing
375355, 375365, H04K 100, H04L 700
Patent
active
056595735
ABSTRACT:
A method and apparatus is provided for facilitating coherent communication reception. A received reference symbol coded spread spectrum communication signal is despread with a spreading code to derive a stream of reference samples and a stream of data samples. The channel response is estimated by utilizing the stream of reference samples. An offset frequency detector determines an offset to be applied to the received signal via a frequency locked loop, while a timing control compensates for slow timing drift and fast fading based on power estimates derived from the stream of reference samples and/or the stream of data samples. A slot detector controls gates which optimize the timing control and frequency offset detector outputs from the various timing branches. Thus an improved detection of estimated data symbols from the stream of received data samples is provided.
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Bruckert Eugene J.
Ling Fuyun
Bocure Tesfaldet
Motorola Inc.
Sonnentag Richard A.
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