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On the design of constant weight codes for VLSI systems

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2 Author(s)
Tallini, L.G. ; Dept. of Comput. Sci., Oregon State Univ., Corvallis, OR, USA ; Bose, B.

A constant weight, w, code with k information bits and r check bits is a binary code of length n=k+r and cardinality 2/sup k/ such that the number of 1s in each code word is equal to w. When w=~n/2 the code is called balanced. The paper describes the design of constant weight codes with parallel encoding and parallel decoding. Infinite families of efficient constant weight codes are given with the parameters k, r and the "number of balancing functions used in the code design", p. The larger p grows the smaller r will be; and the codes can be encoded and decoded with VLSI circuits whose sizes and depths are proportional to pk and log/sub 2/p respectively. For example, a design is given for a constant weight w=33 code with k=64 information bits, r=10 check bits and p=8 balancing functions. This code can be implemented by a VLSI circuit using less than 4054 transistors with a depth of less than 30 transistors.

Published in:

Fault-Tolerant Computing, 1997. FTCS-27. Digest of Papers., Twenty-Seventh Annual International Symposium on

Date of Conference:

24-27 June 1997

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