Back to results
US 8,787,430 B2Granted
Low complexity high-speed communications transceiver
AssigneeEntropic Communications, Inc.
InventorsSreen Raghavan, Thulasinath G. Manickam, Peter J. Sallaway
Life of this patent
Estimating the term…
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.
Claims23
A transmission system, comprising:
- a plurality of receivers, each of the plurality of receivers receiving signals from one of a plurality of transmission bands, at least one of the plurality of receivers comprising:
- a down-converter that converts an input signal from the one of the plurality of transmission bands to a base band, the down-converter creating an in-phase signal and a quadrature signal, the in-phase signal being the input signal multiplied by a cosine function at the frequency of the one of the plurality of transmission bands and the quadrature signal being the input signal multiplied by a sine function at the frequency of the one of the plurality of transmission bands;
- a filter coupled to receive signals from the down-converter, the filter substantially filtering out signals not in the base band and including an in-phase filter filtering the in-phase signal and a quadrature filter filtering the quadrature signal;
- 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 trellis decoder coupled to receive signals from the equalizer and generate recreated data, the recreated data being substantially the same data transmitted by a corresponding transmitter, and
- an offset block coupled between the down-converter and the filter, the offset block offsetting the in-phase signal and the quadrature signal such that signals output from the analog-to-digital converter averages zero.
5 more elements
A transmission system, comprising:
- a plurality of receivers, each of the plurality of receivers receiving signals from one of a plurality of transmission bands, at least one of the plurality of receivers comprising:
- a down-converter that converts an input signal from the one of the plurality of transmission bands to a base band, the down-converter creating an in-phase signal and a quadrature signal, the in-phase signal being the input signal multiplied by a cosine function at the frequency of the one of the plurality of transmission bands and the quadrature signal being the input signal multiplied by a sine function at the frequency of the one of the plurality of transmission bands;
- a filter coupled to receive the in-phase and the quadrature signals from the down-converter, the filter substantially filtering out signals not in the base band and including an in-phase filter filtering the in-phase signal and a quadrature filter filtering the quadrature signal;
- an analog-to-digital converter coupled to receive signals from the filter and generate digitized signals;
- an amplifier coupled between the filter and the analog-to-digital converter, the amplifier amplifying an in-phase filtered signal from the in-phase filter and a quadrature filter signal from the quadrature filter such that the analog-to-digital converter is filled;
- an equalizer coupled to receive the digitized signals;
- and
- a trellis decoder coupled to receive signals from the equalizer and generate recreated data, the recreated data being substantially the same data transmitted by a corresponding transmitter,
- wherein an in-phase gain of the amplifier and a quadrature gain of the amplifier are adaptively chosen in an automatic gain controller.
6 more elements
A transmission system, comprising:
- a plurality of receivers, each of the plurality of receivers receiving signals from one of a plurality of transmission bands, at least one of the plurality of receivers comprising:
- a down-converter that converts an input signal from the one of the plurality of transmission bands to a base band, the down-converter creating an in-phase signal and a quadrature signal, the in-phase signal being the input signal multiplied by a cosine function at the frequency of the one of the plurality of transmission bands and the quadrature signal being the input signal multiplied by a sine function at the frequency of the one of the plurality of transmission bands;
- a filter coupled to receive signals from the down-converter, the filter substantially filtering out signals not in the base band and including an in-phase filter filtering the in-phase signal and a quadrature filter filtering the quadrature signal;
- an analog-to-digital converter coupled to receive signals from the filter and generate digitized signals, the analog-to-digital converter including a first analog-to-digital converter coupled to receive signals from the in-phase filter and a second analog-to-digital converter coupled to receive signals from the quadrature filter;
- an equalizer coupled to receive the digitized signals;
- a correction circuit coupled between the analog-to-digital converter and the equalizer, the correction circuit including an adjustment to correct phases between the in-phase signal and the quadrature signal;
- and
- a trellis decoder coupled to receive signals from the equalizer and generate recreated data, the recreated data being substantially the same data transmitted by a corresponding transmitter,
- wherein a small portion of one of the in-phase signal and the quadrature signal are added to the opposite one of the in-phase signal and the quadrature signal.
6 more elements
A transmission system, comprising:
- a plurality of receivers, each of the plurality of receivers receiving signals from one of a plurality of transmission bands, at least one of the plurality of receivers comprising:
- a down-converter that converts an input signal from the one of the plurality of transmission bands to a base band, the down-converter creating an in-phase signal and a quadrature signal, the in-phase signal being the input signal multiplied by a cosine function at the frequency of the one of the plurality of transmission bands and the quadrature signal being the input signal multiplied by a sine function at the frequency of the one of the plurality of transmission bands;
- 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;
- a trellis decoder coupled to receive signals from the equalizer and generate recreated data, the recreated data being substantially the same data transmitted by a corresponding transmitter;
- an amplifier coupled between the equalizer and the trellis decoder;
- and
- a quadrature correction coupled between the amplifier and the trellis decoder.
6 more elements
A transmission system comprising:
- a plurality of receivers, each of the plurality of receivers receiving signals from one of a plurality of transmission bands, at least one of the plurality of receivers comprising:
- a down-converter that converts an input signal from the one of the plurality of transmission bands to a base band, the down-converter creating an in-phase signal and a quadrature signal, the in-phase signal being the input signal multiplied by a cosine function at the frequency of the one of the plurality of transmission bands and the quadrature signal being the input signal multiplied by a sine function at the frequency of the one of the plurality of transmission bands;
- 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, wherein the equalizer is a complex equalizer executing a transfer function, the transfer function having parameters Ckx(j) and Cky(j), where j is an integer;
- and
- a trellis decoder coupled to receive signals from the equalizer and generate recreated data, the recreated data being substantially the same data transmitted by a corresponding transmitter.
4 more elements
Dependencies are inferred from the claim text.