Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Patent
1997-01-23
2000-01-04
Pham, Chi H.
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
370511, 375371, H04J 306
Patent
active
060118083
ABSTRACT:
The amount of jitter that results in a serial receiver having a parallel architecture Can is reduced by insuring that the edges specifically introduced by the code are actually received by the phase detector. In particular, the code is designed to increase the probability that the edges it introduces are actually received by the phase detector. In a preferred embodiment of the invention, all the edges introduced by the code are actually received by the phase detector. This is achieved by guaranteeing that the edges introduced by the code are evenly spaced in the data stream at a rate corresponding to the phase detector sampling rate. For example, if the receiver consists of N data samplers, e.g., N=5, and one phase detector, the edges introduced by the code are arranged to be N symbols apart. This may be done by inserting as the Nth symbol an overall symbol that has a dummy component so that an edge results between the N-1 symbol and the overall Nth symbol. Thus, the data stream is arranged into repeating frames of N symbols. Alternatively, the frame could be arranged to be a multiple X of N, e.g., the frame is K symbols long, K=XN, with the partially redundant data symbol being the K-1, i.e., XN-1, symbol.
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Larsson Patrik
Magnusson Per
Bayard Emanuel
Lucent Technologies - Inc.
Pham Chi H.
Rosenthal Eugene J.
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