Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2007-05-22
2007-05-22
Ghayour, Mohammed (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S340000, C714S786000
Reexamination Certificate
active
10137657
ABSTRACT:
A DVB-T receiver includes a channel equalizer, a metric assignment and demapping circuit, a Viterbi decoder and an outer Reed-Solomon decoder. The metric assignment and demapping circuit includes a soft-decision quantising arrangement which provides confidence values for the Viterbi decoder. The quantising arrangement receives a control input from channel state indication (CSI) measurement circuitry.A further channel state indication is obtained on a symbol-by-symbol basis. This is compared an average obtained over a few symbols, to detect impulsive interference, and applied as part of the control for the soft-decision quantiser.A signal derived from the further channel state indication is also applied to the erasures input of the Reed-Solomon decoder.
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British Brodcasting Corporation
Flynn ,Thiel, Boutell & Tanis, P.C.
Ghayour Mohammed
Ware Cicely
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