Multiplex communications – Generalized orthogonal or special mathematical techniques
Reexamination Certificate
2003-05-12
2008-03-04
Harper, Kevin C. (Department: 2616)
Multiplex communications
Generalized orthogonal or special mathematical techniques
C370S343000, C370S465000, C370S480000, C375S260000, C375S296000
Reexamination Certificate
active
07339881
ABSTRACT:
A multi-carrier communication system (400) groups subchannels (802) into different quality-of-signal (QoS) regions (804). An unconstrained optimization process (1200) is performed independently for the subchannels (802) of the different QoS regions (804) to allocate bit rates and power to the individual subchannels (802) so that the indicated QoS will result. Coders (504, 508, 512, 516, 1700) partition and error-correction encode source information using encoding schemes matched to the different QoS regions (804). A set (1100) of only a few directed QoS partition vectors (1102) direct the unconstrained optimization process (1200) to attempt bit-rate and power allocations on only a few promising groupings of subchannels (802) and QoS regions (804). An iterative process may take place between bit-rate and power allocation on one side and source information coding on the other for different directed QoS partition vectors (1102) to identify the best solution. A coder (1700) may use a dual allocation process (1800) to iteratively combine a rate-allocation process (1724) with a QoS-region-allocation process (1726) to specify codebooks (1720) for use by a codebook quantizer (1718).
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Abousleman Glen Patrick
Fette Bruce Alan
Kleider John Eric
General Dynamics C4 Systems, Inc.
Gresham Lowell W.
Harper Kevin C.
Jacobsen Charlene R.
Meschkow Jordan M.
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