Multiple-input multiple-output multichip transceiver with correlated clock signals

A multichip receiver comprising:

• first receiver circuitry on a first integrated circuit to process first radio-frequency (RF) signals received from a first signal source;
• second receiver circuitry on a second integrated circuit to process second RF signals received from a second signal source;
• and
• clock-signal generating circuitry to provide phase-matched clock signals to the first and second receiver circuitry,
• wherein the clock-signal generating circuitry is to generate the clock signals from an off-chip crystal,
• wherein the first and second receiver circuitry generate substantially phase-matched local-oscillator frequencies from the phase-matched clock signals for use in processing the received RF signals,
• wherein the clock-signal generating circuitry comprises:
• a first clock driver on the first integrated circuit to receive signals from the crystal;
• a second clock driver on the second integrated circuit to receive signals from the crystal;
• an averaging element to combine output signals from the first and second clock drivers and provide a clock signal output to an off-chip junction;
• and
• a first pair of matched signal paths to provide the clock signals from the junction to the first and second integrated circuits.

A method comprising:

• processing first radio-frequency (RF) signals on a first integrated circuit received from a first signal source to generate a first baseband signal;
• processing second RF signals on a second integrated circuit received from a second signal source to generate a second baseband signal;
• providing phase-matched clock signals to the first and second integrated circuits for use in processing the RE signals;
• combining the baseband signals to generate two or more data streams;
• generating the matched clock signals from an off-chip crystal;
• and
• generating local-oscillator frequencies from the matched clock signals for use in processing the received RF signals,
• wherein generating the matched clock signals comprises:
• receiving signals from the crystal with a clock driver on either the first or the second integrated circuit;
• providing an output from the clock driver to an off-chip junction through a signal path;
• and
• providing the clock signals from the junction to the first and second integrated circuits through matched signal paths,
• wherein the two or more data streams were simultaneously transmitted by a multiple-output transmitting station with two or more antennas.

A method comprising:

• processing first radio-frequency (RF) signals on a first integrated circuit received from a first signal source to generate a first baseband signal;
• processing second RF signals on a second integrated circuit received from a second signal source to generate a second baseband signal;
• providing phase-matched clock signals to the first and second integrated circuits for use in processing the RE signals;
• combining the baseband signals to generate two or more data streams;
• generating the matched clock signals from an off-chip crystal;
• and
• generating local-oscillator frequencies from the matched clock signals for use in processing the received RE signals,
• wherein generating the matched clock signals comprises:
• receiving signals from the crystal at a first clock driver on the first integrated circuit;
• receiving signals from the crystal at a second clock driver on the second integrated circuit;
• combining output signals from first and second clock drivers with an averaging element to provide a clock signal output to an off-chip junction;
• and
• providing the matched clock signals from the junction to the first and second integrated circuits with a first pair of matched signal paths,
• wherein the two or more data streams were simultaneously transmitted by a multiple-output transmitting station with two or more antennas.

A system comprising:

• two or more substantially onmidirectional antennas;
• and
• a multichip receiver comprising:
• first receiver circuitry on a first integrated circuit to process first radio-frequency (RF) signals received from a first of the antennas;
• second receiver circuitry on a second integrated circuit to process second RF signals received from a second of the antennas;
• clock-signal generating circuitry to provide phase-matched clock signals to the first and second receiver circuitry;
• and
• baseband processing circuitry to combine signals from the first and second receiver circuitry to generate two or more data streams, the two or more data streams having been simultaneously transmitted by a multiple-output transmitting station with two or more antennas, wherein the clock-signal generating circuitry is to generate the clock signals from an off-chip crystal,
• wherein the first and second receiver circuitry generate phase-matched local-oscillator frequencies from the matched clock signals for use in processing the received RE signals, and
• wherein the clock-signal generating circuitry comprises:
• a clock driver on either the first or the second integrated circuit to receive signals from the crystal;
• a signal path to provide an output from the clock driver to an off-chip junction;
• and
• matched signal paths to provide the clock signals from the junction to the first and second integrated circuits.

A system comprising:

• two or more substantially onmidirectional antennas;
• and
• a multichip receiver comprising:
• first receiver circuitry on a first integrated circuit to process first radio-frequency (RF) signals received from a first of the antennas;
• second receiver circuitry on a second integrated circuit to process second RE signals received from a second of the antennas;
• clock-signal generating circuitry to provide phase-matched clock signals to the first and second receiver circuitry;
• and
• baseband processing circuitry to combine signals from the first and second receiver circuitry to generate two or more data streams, the two or more data streams having been simultaneously transmitted by a multiple-output transmitting station with two or more antennas,
• wherein the clock-signal generating circuitry is to generate the clock signals from an off-chip crystal,
• wherein the first and second receiver circuitry generate phase-matched local-oscillator frequencies from the matched clock signals for use in processing the received RE signals, and
• wherein the clock-signal generating circuitry comprises:
• a first clock driver on the first integrated circuit to receive signals from the crystal;
• a second clock driver on the second integrated circuit to receive signals from the crystal;
• an averaging element to combine output signals from first and second clock drivers and provide a clock signal output to an off-chip junction;
• and
• a first pair of matched signal paths to provide the clock signals from the junction to the first and second integrated circuits.

A computer readable medium that provides instructions, which when executed by one or more processors cause the one or more processors to perform operations comprising:

• processing first radio-frequency (RF) signals on a first integrated circuit received from a first signal source to generate a first baseband signal;
• processing second RF signals on a second integrated circuit received from a second signal source to generate a second baseband signal;
• providing phase-matched clock signals to the first and second integrated circuits for use in processing the RF signals;
• combining the baseband signals to generate two or more data streams;
• generating the matched clock signals from an off-chip crystal;
• and
• generating local-oscillator frequencies from the matched clock signals for use in processing the received RF signals,
• wherein generating the matched clock signals comprises:
• receiving signals from the crystal with a clock driver on either the first or the second integrated circuit;
• providing an output from the clock driver to an off-chip junction through a signal path;
• and
• providing the clock signals from the junction to the first and second integrated circuits through matched signal paths,
• wherein the two or more data streams were simultaneously transmitted by a multiple-output transmitting station with two or more antennas

A computer readable medium that provides instructions, which when executed by one or more processors cause the one or more processors to perform operations comprising:

• processing first radio-frequency (RF) signals on a first integrated circuit received from a first signal source to generate a first baseband signal;
• processing second RF signals on a second integrated circuit received from a second signal source to generate a second baseband signal;
• providing phase-matched clock signals to the first and second integrated circuits for use in processing the RE signals;
• combining the baseband signals to generate two or more data streams;
• generating the matched clock signals from an off-chip crystal;
• and
• generating local-oscillator frequencies from the matched clock signals for use in processing the received RF signals,
• wherein generating the matched clock signals comprises:
• receiving signals from the crystal at a first clock driver on the first integrated circuit;
• receiving signals from the crystal at a second clock driver on the second integrated circuit;
• combining output signals from first and second clock drivers with an averaging element to provide a clock signal output to an off-chip junction;
• and
• providing the matched clock signals from the junction to the first and second integrated circuits with a first pair of matched signal paths,
• wherein the two or more data streams were simultaneously transmitted by a multiple-output transmilling station with two or more antennas.

A system comprising:

• two or more substantially omnidirectional antennas;
• and
• a multichip transmitter comprising:
• first transmitter circuitry on a first integrated circuit to generate first radio-frequency (RF) signals for transmission by a first of the antennas;
• second transmitter circuitry on a second integrated circuit to generate second RF signals for transmission by a second of the antennas;
• and
• clock-signal generating circuitry to provide phase-matched clock signals to the first and second transmitter circuitry for use in generating the first and second RF signals by averaging clock output signals from the first and second integrated circuits,
• wherein the clock-signal generating circuitry is to generate the clock signals from an off-chip crystal,
• wherein the first and second transmitter circuitry generate phase-matched local-oscillator frequencies from the matched clock signals for use in generating the first and second RF signals for transmission, and
• wherein the clock-signal generating circuitry comprises:
• a clock driver to receive signals from the crystal;
• and
• matched signal paths to provide the clock signals from the clock driver to the first and second integrated circuits, and
• wherein the clock-signal generating circuitry is to generate the clock signals from an off-chip crystal,
• wherein the first and second transmitter circuitry generate phase-matched local-oscillator frequencies from the matched clock signals for use in generating the first and second RF signals for transmission, and
• wherein the clock-signal generating circuitry comprises:
• a clock driver on either the first or the second integrated circuit to receive signals from the crystal;
• a signal path to provide an output from the clock driver to an off-chip junction;
• and
• matched signal paths to provide the clock signals from the junction to the first and second integrated circuits.

A multichip transmitter comprising:

• first transmitter circuitry on a first integrated circuit to generate first radio-frequency (RF) signals for transmission by a first of a plurality of antennas;
• second transmitter circuitry on a second integrated circuit to generate second RF signals for transmission by a second of the antennas;
• and
• clock-signal generating circuitry to provide phase-matched clock signals to the first and second transmitter circuitry for use in generating the first and second RE signals,
• wherein the clock-signal generating circuitry is to generate the clock signals from an off-chip crystal,
• wherein the first and second transmitter circuitry generate phase-matched local-oscillator frequencies from the matched clock signals for use in generating the first and second RF signals for transmission, and
• wherein the clock-signal generating circuitry comprises:
• a clock driver on either the first or the second integrated circuit to receive signals from the crystal;
• a signal path to provide an output from the clock driver to an off-chip junction;
• and
• matched signal paths to provide the clock signals from the junction to the first and second integrated circuits.