Methods and apparatus for improving minimum Hamming weights...

Details Methods and apparatus for improving minimum Hamming weights... Methods and apparatus for improving minimum Hamming weights...

2007-05-15

2007-05-15

Nguyen, Linh (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from minimum d.c. level codes

C341S059000, C341S060000

Reexamination Certificate

active

10639796

ABSTRACT:
A communications channel includes a buffer that receives symbols of user data including a plurality of M-bit symbols. A seed selector receives the M-bit symbols of the user data, selectively removes symbols of the user data from a seed set, and selects a scrambling seed from symbols remaining in the seed set. A scrambling device that communicates with the seed selector and the data buffer generates scrambled user data using the user data and the selected scrambling seed. A Hamming weight coding device determines a Hamming weight of symbols of the scrambled user data and selectively codes the symbols depending upon the determined Hamming weight.

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