Re-configurable decoding in modem receivers
AssigneeIntel Corporation
InventorsQian Xie, Huaiyu Zeng
Life of this patent
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Abstract
Methods and systems provide for operating a modem receiver such as an ADSL modem receiver. As incoming data signals are received, a decoding scheme is selected from a plurality of decoding schemes based on a predetermined downstream data rate. In one approach a soft receiver architecture of an ADSL modem is able to select between relatively complex decoding schemes and relatively simple decoding schemes based on signal-to-noise ratio (SNR).
Claims36
A method of operating a modem receiver, comprising:
- receiving an incoming data signal;
- selecting a decoding scheme from a plurality of decoding schemes based on a predetermined downstream data rate for the incoming data signal;
- monitoring a signal-to-noise ratio associated with one or more tones of the incoming data signal;
- and
- selecting the decoding scheme based on the signal-to-noise ratio and a signal-to-noise ratio threshold, the threshold corresponding to the predetermined downstream data rate.
A method of operating an asymmetric digital subscriber line modem receiver, comprising:
- receiving an incoming data signal;
- equalizing the incoming data signal in a frequency domain;
- selecting a first decoding scheme from a first plurality of decoding schemes based on a predetermined downstream data rate for the incoming data signal;
- loading the first decoding scheme into a processor memory of the modem receiver;
- decoding the incoming data signal in accordance with the first decoding scheme;
- selecting a second decoding scheme from a second plurality of decoding schemes based on the predetermined downstream data rate for the incoming data signal;
- loading the second decoding scheme into the processor memory;
- decoding the incoming data signal in accordance with the second decoding scheme;
- framing the incoming data signal;
- monitoring a signal-to-noise ratio associated with one or more tones of the incoming data signal;
- and
- selecting the first and second decoding schemes based on the signal-to-noise ratio and a signal-to-noise ratio threshold, the signal-to-noise ratio threshold corresponding to the predetermined downstream data rate.
A machine readable storage medium comprising a stored set of instructions capable of being executed by a processor to:
- receive an incoming data signal at a soft receiver architecture of a modem;
- select a decoding scheme from a plurality of decoding schemes based on a predetermined downstream data rate for the incoming data signal;
- monitor a signal-to-noise ratio associated with one or more tones of the incoming data signal;
- and
- select the decoding scheme based on the signal-to-noise ratio and a signal-to-noise ratio threshold, the threshold to correspond to the predetermined downstream data rate.
A modem system comprising:
- a transformation module to transform an incoming data signal from a time domain to a frequency domain;
- a random access memory to store set of instructions;
- a processor coupled to the transformation module and the random access memory, the processor to execute the instructions to receive the incoming data signal from the transformation module and select a decoding scheme from a plurality of decoding schemes based on a predetermined downstream data rate for the incoming data signal;
- monitor a signal-to-noise ratio associated with one or more tones of the incoming data signal;
- and
- select the decoding scheme based on the signal-to-noise ratio and a signal-to-noise ratio threshold, the threshold to correspond to the predetermined downstream data rate.
Dependencies are inferred from the claim text.