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US 8,948,240 B2Granted
System and method for terrestrial high-definition television reception
AssigneeBroadcom Corporation
InventorsRandall Perlow, Charles Brooks, Steven Jaffe, Tianmin Liu
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Abstract
An adaptive receiver is disclosed for optimally receiving and processing signals. The receiver utilizes one or more memory blocks to store groups of incoming symbols. The groups of symbols are processed by a channel estimation subsystem to determine channel characteristics. The receiver determines the appropriate demodulation and decoding strategy to implement based on the determined channel characteristics. The receiver includes a plurality of demodulation and decoding schemes, one of which is selected based on the results of a channel estimation analysis.
Claims34
A method comprising:
- receiving a channel estimation;
- selecting one of a plurality of demodulators in response to the channel estimation indicating that characteristics of the channel are fast varying;
- demodulating a plurality of subsequent incoming signal blocks with the one of the plurality of demodulators, wherein a first demodulator of the plurality of demodulators comprises an equalizing circuit that transforms an input signal to a frequency domain signal and filters the frequency domain signal;
- and
- selecting at least one of a plurality of decoders in response to the channel estimation.
2 more elements
A method comprising:
- analyzing one or more characteristics associated with each of a plurality of demodulators to determine which one of the plurality of demodulators is operating with better performance;
- and
- demodulating a plurality of subsequent incoming signal blocks with the one of the plurality of demodulators that is operating with better performance, wherein a first demodulator of the plurality of demodulators comprises an equalizing circuit that transforms an input signal to a frequency domain signal and filters the frequency domain signal, wherein the first demodulator is selected if channel characteristics are determined to be unreliable, the equalizing circuit transforming the input signal when the channel characteristics include a strong echo;
- wherein the first demodulator is selected as the one of the plurality of demodulators that is operating with better performance responsive to the channel characteristics varying fast.
1 more element
A device comprising:
- a plurality of demodulators;
- a demodulator selection module that is configured to:
- analyze one or more characteristics associated with each of the plurality of demodulators to determine which of the plurality of demodulators is operating with better performance;
- and
- select one of the plurality of demodulators that is operating with better performance to demodulate a plurality of subsequent incoming signals, wherein a first demodulator of the plurality of demodulators comprises an equalizing circuit configured to transform an input signal to a frequency domain signal and filter the frequency domain signal, wherein the first demodulator is selected by the demodulator selection module responsive to channel characteristics being unreliable, the equalizing circuit transforming the input signal when the channel characteristics include a strong echo;
- and
- a plurality of decoders, wherein the demodulator selection module is configured to select one of the decoders in response to the channel characteristics.
4 more elements
A device comprising:
- a plurality of demodulators;
- and
- a demodulator selection module that is configured to:
- analyze one or more characteristics associated with each of the plurality of demodulators to determine which of the plurality of demodulators is operating with better performance;
- and
- select one of the plurality of demodulators that is operating with better performance to demodulate a plurality of subsequent incoming signals, wherein a first demodulator of the plurality of demodulators comprises an equalizing circuit configured to transform an input signal to a frequency domain signal and filter the frequency domain signal, wherein the first demodulator is selected by the demodulator selection module if channel characteristics are unreliable, the equalizing circuit transforming the input signal when the channel characteristics include a strong echo, wherein the first demodulator is selected by the demodulator selection module responsive to the channel characteristics being fast varying.
3 more elements
Processing circuitry comprising:
- a plurality of demodulators, wherein a first demodulator of the plurality of demodulators comprises an equalizing circuit that transforms an input signal to a frequency domain signal and filters the frequency domain signal;
- and
- a demodulator selection module configured to:
- analyze one or more characteristics associated with each of the plurality of demodulators to determine which one of the plurality of demodulators is operating with better performance;
- and
- select the one of the demodulators that is operating with better performance;
- wherein the plurality of demodulators are configured to demodulate a plurality of subsequent incoming signal blocks with the selected demodulator, wherein the first demodulator is selected if channel characteristics are determined to be fast varying, the equalizing circuit transforming the input signal when the channel characteristics include a strong echo;
- and
- wherein the equalizing circuit is configured to provide a set of coefficients for the equalizing circuit in response to the channel characterisitics.
6 more elements
Dependencies are inferred from the claim text.