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US 7,590,168 B2Granted
Low complexity high-speed communications transceiver
AssigneeEntropic Communications, Inc.
InventorsSreen A. Raghavan, Thulasinath G. Manickam, Peter J. Sallaway
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Abstract
A communication system is disclosed that allows high data-rate transmission of data between components. N-bit parallel data is transmitted in K-frequency separated channels on the transmission medium so as to fully take advantage of the overall bandwidth of the transmission medium. As a result, a very high data-rate transmission can be accomplished with low data-bit transmission on individual channels. A transmitter system and a receiver system are described for the communication system.
Claims37
A serial/deserializer transmission system, comprising:
- a plurality of demodulators, each of the plurality of demodulators receiving signals from one of a plurality of transmission bands that are transmitted on a single electrically differential conductive pair, at least one of the plurality of demodulators comprising:
- an analog down converter that converts an input signal from the one of the plurality of transmission bands to a base band;
- a filter coupled to receive signals from the down converter, the filter substantially filtering out signals not in the base band;
- an analog-to-digital converter coupled to receive signals from the filter and generate digitized signals;
- an equalizer coupled to receive the digitized signals;
- and
- a decoder coupled to receive signals from the equalizer and generate recreated data, the recreated data being substantially the same data transmitted by a corresponding modulator,
- wherein the plurality of demodulators recover a plurality of bits synchronously distributed across the plurality of transmission bands in the serial/deserializer transmission system, the plurality of demodulators being synchronous to each other.
5 more elements
A method of receiving data in a serial/deserializer system, comprising:
- receiving an input signal into a plurality of demodulators coupled to a single conducting differential pair, each of the plurality of demodulators receiving signals from one of a plurality of transmission bands synchronously with others of the plurality of demodulators, a plurality of bits of the received input signal having been synchronously encoded and transmitted across the plurality of transmission bands, each of the plurality of demodulators performing the functions of:
- analog down-converting the input signal to obtain a base band signal corresponding to one of the respective plurality of transmission bands;
- filtering the base band signal to remove signals not in the base band;
- digitizing the filtered base band signal to obtain a digitized signal;
- equalizing the digitized signal, wherein equalizing is accomplished using a complex equalizer executing a transfer function, the transfer function having parameters Ckx(j) and Cky(j), where x, y, k, and j are integers;
- wherein the parameters Ckx(0) and Cky(0) are fixed to avoid interaction with an adaptation of gain coefficients used in an amplifier and a carrier phase rotation performed in a phase rotator;
- and
- decoding the equalized signal to recover data that is substantially the same as that transmitted by a corresponding modulator in a transmitter, wherein the plurality of bits synchronously transmitted across the plurality of transmission bands of the serial/deserializer system is recovered,
- wherein operating parameters of at least one of the down-converting, the filtering, the digitizing and equalizing are adaptively chosen.
6 more elements
A receiver system in a serial/deserializer system, comprising:
- means for receiving an input signal from a single conductive differential pair, the input signal including a plurality of transmission bands;
- and for each of the plurality of transmission band:
- means for down-converting the input signal to a base-band signal;
- means for obtaining a digital signal from the base-band signal;
- means for equalizing the digital signal, wherein equalizing is accomplished using a complex equalizer executing a transfer function, the transfer function having parameters Ckx(j) and Cky(j), where x, y, k, and j are integers;
- wherein the parameters Ckx(0) and Cky(0) are fixed to avoid interaction with an adaptation of gain coefficients used in an amplifier and a carrier phase rotation performed in a phase rotator;
- and
- means for decoding the equalized signal to recover data transmitted by a corresponding modulator in a transmitter coupled to the single conductive differential pair,
- wherein a plurality of bits that were synchronously transmitted across the plurality of transmission bands is recovered, and the means for down-converting, means for obtaining, and means for equalizing, and means for decoding for each of the plurality of transmission bands are synchronous to each other;
- and
- wherein operating parameters of at least one of the means for down-converting, the means for filtering, the means for obtaining a digital signal, and means for equalizing are adaptively chosen.
8 more elements
Dependencies are inferred from the claim text.