Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Patent
1997-10-02
1999-10-19
Chin, Stephen
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
375286, 375298, 375262, H04L 2302, H04L 2534, H04L 2736
Patent
active
059700980
ABSTRACT:
A improved multilevel encoder and associated method is described. The encoder includes a device (e.g., serial to parallel converter) for presenting a plurality of information bits in parallel format. A symbol selector having a plurality of inputs and an output, the symbol selector being configured to output a symbol that is defined by a signal constellation, whereby the symbol is defined by a magnitude and phase that are uniquely associated with a state of the plurality of inputs. A first encoder has an input and an output, the input of the first encoder being associated with at least one of the outputs of the device and the output being associated with at least one of the inputs of the symbol selector, the first encoder configured by a code defining a four-way set partition of the signal constellation. A second encoder has an input and an output, the input of the second encoder being associated with at least one of the outputs of the device and the output being associated with at least one of the inputs of the symbol selector, the second encoder configured by a code defining a two-way set partition of the signal constellation.
REFERENCES:
patent: 5305352 (1994-04-01), Calderbank et al.
patent: 5659579 (1997-08-01), Herzberg
patent: 5844922 (1998-12-01), Wolf et al.
High-Rate Punctured Convolutional Codes for Soft Decision Viterbi Decoding, IEEE Transactions on Communications, vol. Com-32, No. 3, Mar. 1984.
On the Spectrum of Distances of a Multilevel Code, Decoded by a Multistage Decoder, Hanan Herzberg, IEEE Transactions on Information Theory, vol. 43, No. 5, Sep. 1997.
Chin Stephen
Deppe Betsy L.
Globespan Technologies, Inc.
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