Means and method for block encoding detection and decoding

Details Means and method for block encoding detection and decoding Means and method for block encoding detection and decoding

1986-01-17

1988-03-15

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

371 37, 370 21, H04L 2302

Patent

active

047317990

ABSTRACT:
Numeric signals appearing on a communication channel are converted in blocks of b signals to a number N. The number N is converted to coordinates in K dimensional space where 40.gtoreq.K<4. The coordinates are selected to provide suitable packing in the dimensional space represented by K. The values of coordinates selected are modulated on a carrier and transmitted. Apparatus is provided which carries out the above steps.
Where K=24 the coordinates are selected to be expressible in integral form and in integral form are selected so that they have all even values with a sum of 0 modulo 8 or all odd values with a sum of 4 modulo 8.

REFERENCES:
patent: 3506961 (1970-04-01), Abramson et al.
patent: 3792355 (1974-02-01), Miyata et al.
patent: 3900721 (1975-08-01), Speiser et al.
patent: 4510578 (1985-04-01), Miyaguchi et al.
patent: 4630288 (1986-12-01), Longstaff
N. J. A. Sloane, "The Packing of Spheres", Scientific America, Jan. 1984, vol. 250, No. 1, at p. 116.
G. R. Lang, "Special Rapporteurs Meeting on 9600 Bit/Second Duplex Modem Family", Mar. 1983.
Conway et al, "Fast Quantizing and Decoding Algorithms for Lattice Quantizers and Codes", IEEE Transactions on Information Theory, vol. IT-28 No. 2, Mar. 1982.

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