Pulse or digital communications – Repeaters – Testing
Patent
1988-04-13
1990-09-25
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
332103, 3701101, 371 43, 375 42, H04L 2734
Patent
active
049598422
ABSTRACT:
A Voronoi signal constellation with ties includes those points of a lattice .LAMBDA. (or a coset .LAMBDA.+c) that lie within a Voronoi region of a sublattice .LAMBDA.' of .LAMBDA., .LAMBDA.' being other then a scaled version of .LAMBDA., and the constellation includes more than .vertline..LAMBDA./.LAMBDA.'.vertline. points, where .vertline..LAMBDA./.LAMBDA.'.vertline. is the order of the lattice partition .LAMBDA./.LAMBDA.'. In order aspects, the lattices .LAMBDA. and .LAMBDA.' are of dimension greater than two; the sublattice .LAMBDA.' is a version of a binary lattice of depth at least two and normalized informativity less than one; a method is provided of mapping from m data bits to a point drawn from a Voronoi constellation of more than 2.sup.m points, based on an N-dimensional lattice partition .LAMBDA./.LAMBDA.'; and Voronoi constellations are provided comprising points of a lattice .LAMBDA. (or a coset .LAMBDA.+c) that lie within a Voronoi region of a sublattice .LAMBDA.' of .LAMBDA., the sublattice .LAMBDA.' comprising a binary lattice of depth two and normalized informativity less than one. Such sublattices .LAMBDA.' are also useful in lattice quantizers.
REFERENCES:
patent: 3805191 (1974-04-01), Kawai et al.
patent: 4495477 (1985-01-01), Weber
patent: 4538284 (1985-08-01), Lang et al.
patent: 4562426 (1985-12-01), Forney, Jr.
patent: 4630287 (1986-12-01), Armstrong
patent: 4713817 (1987-12-01), Wei
IEEE Transactions on Information Theory; vol. IT-29, No. 6, Nov. 1983, PP820-824; Conway and Sloane, "A Fast Encoding Method for Lattice Codes and Quantizers".
IEEE Journal on Selected Areas in Communications, vol. SAC-2, No. 5, Sep. 1984, Forney et al.; "Efficient Modulation for Band-Limited Channels", pp. 632-647.
IEEE Transactions on Information Theory; vol. IT-28, No. 2, Mar. 1982, pp. 227-232, Conway & Sloane, "Fast Quantizing and Decoding Algorithms for Lattice Quantizers and Codes".
IEEE Transactions on Information Theory; vol. IT-32, No. 1, Jan. 1986, pp. 41-50, "Soft Decoding Techniques for Codes and Lattices, Including the Golay Code and Leech Lattice".
IEEE Transactions on Communications, vol. COM-21, No. 10, Oct. 1973, pp. 1108-1115; Simon and Smith, "Hexagonal Multiple Phase-and-Amplitude-Shift Keyed Signal Sets".
Codex Corporation
Safourek Benedict V.
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