Patent · US Active

Method to invoke channel decoder early to decrease the acquisition time in demodulators

US8654873B2 · kind B2 · utility

0Cited by

1References

9Claims

0Family size

Inventors

Gururaj Padaki · Kanchinakote, IN
Sunil Hosur Rames · Bengaluru, IN
Rakesh A. Joshi · Savanuru, IN
Raghavendra Raichur · Bengaluru, IN
Rajendra Hegde · Bengaluru, IN

Key dates

Filing date	Mar 30, 2012
Grant date	Feb 18, 2014
Priority date	—
Expiry date	Jul 31, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH04L25/03178
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

In one embodiment, a Television (TV) receiver to perform a method of synchronizing a demodulator at a Viterbi decode input in the TV receiver using one or more bit de-interleaved even and odd Orthogonal Frequency Division Multiplexing (OFDM) symbols is provided. The method includes (i) performing a Viterbi decoding on the bit de-interleaved even and odd OFDM symbols when a frame boundary does not exist for the bit de-interleaved even and odd OFDM symbols, (ii) performing a convolutional encoding on an decoded data output of the Viterbi decoding, (iii) determining whether an output of the convolutional encoding of the bit de-interleaved OFDM symbols matches an input at a Viterbi decode, and (iv) determining whether the output of the convolutional encoding of the bit de-interleaved even and odd OFDM symbols matches with a SYNC pattern or a SYNC′ pattern to obtain a RS packet align boundary.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.