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Details of Grant 

EPSRC Reference: GR/L07680/01
Title: CODES OVER CHAIN RINGS
Principal Investigator: Norton, Dr G
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department: Electrical and Electronic Engineering
Organisation: University of Bristol
Scheme: Standard Research (Pre-FEC)
Starts: 01 April 1997 Ends: 31 March 2000 Value (£): 103,856
EPSRC Research Topic Classifications:
Digital Signal Processing
EPSRC Industrial Sector Classifications:
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Summary on Grant Application Form
We propose studying the algebraic properties and decoding of error-correcting codes over finite rings such as Z_4 and their finite extensions (galois rings) as families of cyclic codes (BCH, Reed Solomon, quadratic residue) using two approaches: established algebraic techniques (multi. group of units, canonical rings maps, DFT) and the inverse system of a code, including its p-adic limit, obtained by Hensel lifting. Symbolic computation will play a key role of extending the theory and for developing algorithms. Since any cyclic code over Z_q (q +p?e) yields a code over Z_p with many codewords, this work has the potential of introducing new p-ary codes with good minimum distance and which can be systematically and efficiently decoded. The proposer is unaware of other UK research on linear block codes over chain rings.
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Organisation Website: http://www.bris.ac.uk