Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2008-05-12
2011-10-04
Phu, Phuong (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S261000, C375S260000, C375S264000, C375S265000, C375S341000, C714S794000, C714S795000, C714S792000
Reexamination Certificate
active
08031791
ABSTRACT:
A method for implementation of error correction decoding of quadrature layered modulation QLM communications. A bound on communications capacity derived using ideal QLM is approximated with QLM communications links which support data rates independent of the Shannon bound. Trellis symbol and bit demodulation algorithms recover QLM data symbols and bit algorithms offer computational efficiency at a cost of decisioning errors. Correlated bit decisioning error correction decoding and re-encoding can be implemented in a bit demodulation algorithm. Trellis demodulation and trellis decoding algorithms support parallel implementations, and concatenated implementations wherein the error correction decoding is implemented after the QLM demodulation. Concatenated implementation supports turbo decoding, MAP decoding, convolutional decoding, and block decoding by using the decisioning metrics available from QLM demodulation in place of generating the decisioning metrics directly from the detected symbol measurements. The invention describes how QLM can be used with WiFI, WiMaX, CDMA, OWDMA.
REFERENCES:
patent: 6731668 (2004-05-01), Ketchum
patent: 7391819 (2008-06-01), von der Embse
U.S. Appl. No. 12/069,418, filed Feb. 11, 2008.
Phu Phuong
von der Embse Urbain A.
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