Pulse or digital communications – Synchronizers – Synchronizing the sampling time of digital data
Patent
1997-03-19
1999-02-09
Bocure, Tesfaldet
Pulse or digital communications
Synchronizers
Synchronizing the sampling time of digital data
H04L 700
Patent
active
058704434
ABSTRACT:
A data symbol timing recovery technique for determining an optimum symbol timing phase for use in digital communication systems using a burst mode digital communication format. The technique uses a nonlinear operation, e.g., squaring the magnitude of a down-converted baseband demodulated data burst. The squared signal is processed through a simple one pole IIR digital filter which extracts the symbol timing phase offset. The phase offset is scaled to the time domain and used to adjust the symbol timing of the next data burst. This technique is applicable to phase modulated data such as BPSK or QPSK modulated data. The technique was simulated using .pi./4 QPSK modulated data and provided improved and robust performance.
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Bocure Tesfaldet
Hughes Electronics Corporation
Sales Michael W.
Whelan John T.
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