Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2006-06-20
2006-06-20
Lamarre, Guy J. (Department: 2133)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
C714S759000, C714S792000, C714S786000, C714S794000, C714S795000, C714S796000, C375S265000, C375S262000, C375S261000, C375S341000, C375S279000
Reexamination Certificate
active
07065695
ABSTRACT:
Metric calculation design for variable code rate decoding of broadband trellis, TCM (trellis coded modulated), or TTCM (turbo trellis coded modulation). A single design can accommodate a large number of code rates by multiplexing the appropriate paths within the design. By controlling where to scale for any noise of a received symbol within a received signal, this adaptable design may be implemented in a manner that is very efficient in terms of performance, processing requirements (such as multipliers and gates), as well as real estate consumption. In supporting multiple code rates, appropriately selection of the coefficients of the various constellations employed, using the inherent redundancy and symmetry along the I and Q axes, can result in great savings of gates borrowing upon the inherent redundancy contained therein; in addition, no subtraction (but only summing) need be performed when capitalizing on this symmetry.
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Cameron Kelly Brian
Lau Linda K.
Shen Ba-Zhong
Tran Hau Thien
Broadcom Corporation
Garlick Harrison & Markison LLP
Lamarre Guy J.
Short Shayne X.
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