itrctor@csri.toronto.edu (Ron Riesenbach) (05/11/89)
ITRC sponsored DSP seminar
Friday, May 12, 1989
10:00 - 12:00
Rm GB248, Galbraith Bldg., Univ. of Toronto
Everyone is welcome
Coffee and muffins supplied courtesy of ITRC ;-)
"Block Coding as Applied to Voice Line Modems"
Fred Longstaff
VP - Systems
Motorola Information Systems
ABSTRACT
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Block coding, based on a multidimensional lattice, is an alternative to the
more commonly used trellis codes. The block coding problem consists of three
parts: encoding, detection and decoding.
o Encoding: Conversion of data to be transmitted in coordinates of a
lattice point.
o Detection: Conversion of the received coordinates into those of the
nearest lattice point.
o Decoding: Further conversion of the received data.
This talk will review the fundamental principles of block coding and will
describe two examples of the use of this technique: the 8-dimensional Gosset
lattice, and the 24-dimensional Leech lattice, A24.