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US 7,613,247 B2Granted
Variable throughput reduction communications system and method
AssigneeLinex Technologies, Inc.
InventorJoseph Garodnick
Life of this patent
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Abstract
A communications system and method having a transmitted data rate determined by an error rate syndrome at a receiver. Data are demultiplexed into a plurality of data channels, and processed as a plurality of channels. A combiner combines the plurality of channels as a multiplexed signal. At a receiver, the multiplexed signal is despread into a plurality of despread channels. A syndrome signal is generated from an error rate of the channels. From the syndrome signal, a desired-data rate is determined for the transmitter.
Claims10
A communications system comprising
- a transmitter, including,
- a demultiplexer for demultiplexing input data into a plurality of data channels;
- a plurality of forward-error-correction encoders and interleavers, coupled to said demultiplexer, for FEC encoding and interleaving the plurality of data channels as a plurality of FEC encoded and interleaved channels, respectively;
- a plurality of processors coupled to said plurality of FEC encoders and interleavers, for processing the plurality of FEC encoded and interleaved channels as a plurality of modulated channels;
- a combiner coupled to said plurality of processors, for combining the plurality of modulated channels as a multiplexed signal;
- a receiver, including,
- a plurality of demodulators for demodulating the multiplexed signal into a plurality of demodulated channels, respectively;
- a multiplicity of FEC decoder and de-interleavers, coupled to said plurality of demodulators for FEC decoding and de-interleaving the multiplicity of demodulated channels, as a multiplicity of decoded demodulated channels having an error rate;
- a command processor responsive to the error rate for determining a desired data rate and generating a control signal to be transmitted to the transmitter;
- and
- a multiplexer, coupled to said plurality of FEC decoders and de-interleavers, for multiplexing the multiplicity of decoded channels.
8 more elements
A communications system comprising:
- a transmitter, including,
- demultiplexer means for demultiplexing input data into a plurality of data channels;
- encoder means far FEC encoding and interleaving the plurality of data channels as a plurality of FEC encoded and interleaved channels, respectively;
- processor means for processing the plurality of FEC encoded and interleaved channels as a plurality of modulated channels;
- combiner means for combining the plurality of modulated channels as a multiplexed signal;
- a receiver, including,
- demodulator means for demodulating the multiplexed signal into a plurality of demodulated channels, respectively;
- decoder means for FEC decoding and de-interleaving the multiplicity of demodulated channels, as a multiplicity of decoded channels having an error rate;
- command processor means responsive to the error rate for generating a signal indicating a desired data rate to be sent to said transmitter;
- and
- multiplexer means for multiplexing the multiplicity of decoded channels.
8 more elements
A communications method comprising the steps of:
- demultiplexing input data into a plurality of data channels;
- FEC encoding and interleaving the plurality of data channels as a plurality of FEC encoded and interleaved channels, respectively;
- processing the plurality of FEC encoded and interleaved channels as a plurality of modulated channels;
- combining the plurality of channels as a multiplexed signal;
- transmitting the multiplexed signal having the plurality of modulated channels, over a communications channel;
- demodulating the multiplexed signal into a plurality of demodulated channels, respectively;
- FEC decoding and de-interleaving the plurality of demodulated channels, as a multiplicity of decoded channels;
- generating a syndrome signal from an error rate of the multiplicity of decoded channels;
- generating, in response to the syndrome signal, a channel quality indication signal indicating a desired data rate;
- transmitting the quality indication signal to the transmitter;
- and
- multiplexing the multiplicity of decoded channels.
9 more elements
Dependencies are inferred from the claim text.