Pulse or digital communications – Systems using alternating or pulsating current
Reexamination Certificate
2008-05-06
2008-05-06
Tran, Khai (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Reexamination Certificate
active
10786362
ABSTRACT:
An interleaving operation can scramble (permute) a data stream, or each dimension (set of symbols (a, b, c, . . . )) in a data stream, immediately following FEC encoding or dimension multiplexing of the data stream. Bursts of errors might be combined with the permuted data before, during, or after transmission. A de-interleaver reorders the received symbols and, in the process, spreads (separates) the bursts of errors. Also, using the multi-dimensional interleaving and de-interleaving can balance SNR on each channel. Spreading the errors and/or balancing SNR can keep bursts from overwhelming the FEC decoder or an FEC decoder in any one channel. In one example, interleaving and de-interleaving can be used to scramble data over Ethernet twisted wire pairs. In another example, interleaving and de-interleaving can be used to scramble data or information broadcast via wireless telecommunications channels (e.g., radio frequency channels, multi-antenna channels, etc).
REFERENCES:
patent: 5946357 (1999-08-01), Sandin et al.
patent: 2002/0196766 (2002-12-01), Hwang et al.
patent: 2004/0128696 (2004-07-01), Bhaskaran et al.
patent: 2004/0160943 (2004-08-01), Cain
Broadcom Corporation
Sterne Kessler Goldstein & Fox P.L.L.C.
Tran Khai
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