Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1993-08-17
1995-03-21
Chin, Stephen
Pulse or digital communications
Spread spectrum
Direct sequence
375114, H04L 700
Patent
active
054003687
ABSTRACT:
In a digital wireless communication system, a first unit transmits a digitally encoded signal to a second unit in a plurality of non-contiguous time slots. Within each time slot, the digitally encoded signal has a synchronization signal portion followed by a data signal portion. The second unit has an antenna to receive the synchronization signal portion of the digitally encoded signal. The second unit also has a clock to generate a clock signal at a first rate having a sampling phase. An analog to digital converter receives the clock signal and the synchronization signal and samples the synchronization signal at the first rate to generate a first plurality of symbols. An interpolator receives the first plurality of symbols and interpolates the first plurality of symbols to generate a second plurality of symbols at a second rate. The second rate is a multiple of the first rate. A match filter receives the second plurality of symbols and compares the second plurality symbol of symbols to a stored plurality of symbols to generate an error signal. The sampling phase of the clock signal is altered in response to the error signal, after to the receipt of the synchronization signal.
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Cheng Jong-Keung
Lin Nan-Sheng
Suzuki Kenkichi
Touriguian Mihran
Bocure Tesfaldet
Chin Stephen
Teknekron Communications Systems, Inc.
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