Method to generate pseudo-random sequence of multi-carrier...

Cryptography – Key management – Having particular key generator

Reexamination Certificate

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C380S044000, C380S046000, C708S250000

Reexamination Certificate

active

07035408

ABSTRACT:
To generate a pseudo-random sequence (PRMS1) of multi-carrier data symbols (DMT0, DMT1, DMT2), a pseudo-random bit sequence (PRBS1) is produced by repetitively generating a pseudo-random sequence of L bits, L being a first integer value (L=4). To create a multi-carrier data symbol (DMT0, DMT1, DMT2) N bits are used, N being a second integer value (N=8). The pseudo-random bit sequence (PRBS1) is subdivided into strings of N′ bits, N′ being a third integer value larger than N (N′=9), and N bits out of each string of N′ bits are used to generate a respective multi-carrier data symbol (DMT0, DMT1, DMT2). N′-N bits out of each string of N′ bits are left unused.

REFERENCES:
patent: 5054067 (1991-10-01), Moroney et al.
patent: 5438622 (1995-08-01), Normile et al.
patent: 6014408 (2000-01-01), Naruse et al.
patent: 0 443 752 (1991-08-01), None
patent: 0 924 905 (1999-06-01), None
ADSL Standard Specification Network and Customer installation Interfaces—Asymmetric Digital Subscriber Line (ADSL) Metallic Interface, published by the American National Standard Institute (ANSI), 1998, referred to by ANSI T1E1.413 Issue 2.

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