Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1993-02-26
1993-12-07
Kuntz, Curtis
Pulse or digital communications
Spread spectrum
Direct sequence
375120, 3701053, 328 55, H04L 404
Patent
active
052689360
ABSTRACT:
Improved jitter performance is realized in a desynchronizer for obtaining an asynchronous signal, e.g., a CEPT-4 signal, from a received synchronous signal, e.g., a SDH STM-1 signal. The improved jitter performance results from employing a unique gap generator which causes gaps in a received data signal to be spread regularly in time, and allows for almost continuous control by numerical techniques of the phase of a smooth output clock being generated. Phase control is obtained by employing a filtered version of the difference between the actual number of data bits in the received digital signal and the expected nominal number.
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AT&T Bell Laboratories
Ghebretinsae T.
Kuntz Curtis
Stafford Thomas
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