Pulse or digital communications – Systems using alternating or pulsating current
Patent
1996-09-06
2000-02-29
Pham, Chi H.
Pulse or digital communications
Systems using alternating or pulsating current
375222, H04L 2700
Patent
active
060318732
ABSTRACT:
A method and apparatus for shell mapping that is independent of the number of bits to be mapped. Although the number of bits need to be known, the number does not affect the operation of the inventive algorithm and so filling with significant zeros may be used to obtain a large number of bits. This means that any tables used to efficiently implement the algorithm do not need to change when the data rate changes. In particular, the invention orders a set of shell combinations (the N-tuple [m.sub.1, m.sub.2, . . . m.sub.N ] defining a set of shell indices or selectors) such that any group of binary input bits having the same numerical value always selects a same shell combination.
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3Com Corporation
Corrielus Jean B
Pham Chi H.
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