Multidimensional channel coding

Details Multidimensional channel coding Multidimensional channel coding

1982-02-08

1984-06-26

Griffin, Robert L.

Pulse or digital communications

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Testing

375 39, 375 42, 375 53, 332 17, H04L 2504, H04L 2520

Patent

active

044570040

ABSTRACT:
An n-dimensional channel code is used in a data transmission system. The alphabet of codewords (data symbols) comprises a subset of points of a selected coset of a selected lattice. The alphabet includes at least one point of the coset whose norm (signal energy) is greater than at least one other point of the coset which is excluded from the alphabet.

REFERENCES:
patent: 4084137 (1978-04-01), Welti
E. N. Gilbert, "A Comparison of Signalling Alphabets," Bell System Technical Journal, vol. 31, No. 3, May 1952, pp. 504-522.
Ian F. Blake, "The Leech Lattice as a Code for the Gaussian Channel," Information and Control 19, 1971, pp. 66-74.
George R. Welti and Jhong S. Lee, "Digital Transmission with Coherent Four Dimensional Modulation," IEEE Transactions on Information Theory, vol. IT-20, No. 4, July 1974, pp. 497-501.
G. R. Welti, "PCM/FDMA Satellite Telephone with 4-Dimensionally-Coded Quadrature Amplitude Modulation," Comsat Technical Review, vol. 6, No. 2, Fall 1976, pp. 323-338.
P. de Buda, "Encoding and Decoding Algorithms for an Optimal Lattice-Based Code," International Conference on Communications Conference Record, vol. 3, pp. 65.3.1-65.3.5.

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