Full duplex backhaul radio with MIMO antenna array

  • US 9,350,411 B2
  • Filed: 08/27/2015
  • Issued: 05/24/2016
  • Est. Priority Date: 08/17/2011
  • Status: Active Grant
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First Claim
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1. A backhaul radio for exchanging one or more data interface streams with one or more other backhaul radios, said backhaul radio comprising:

  • one or more demodulator cores, wherein each demodulator core is configured to demodulate one or more of a plurality of receive symbol streams to produce one or more receive data interface streams;

    a plurality of receive radio frequency (RF) chains, wherein each receive RF chain is configured to convert from a respective one of a plurality of receive RF signals within a receive frequency band to a respective one of a plurality of receive chain output signals;

    a frequency selective receive path channel multiplexer, interposed between the one or more demodulator cores and at least the plurality of receive RF chains, wherein the frequency selective receive path channel multiplexer is configured to generate the plurality of receive symbol streams from at least the plurality of receive chain output signals;

    one or more modulator cores, wherein each modulator core is configured to modulate one or more transmit data interface streams to produce one or more of a plurality of transmit symbol streams;

    a plurality of transmit radio frequency (RF) chains, wherein each transmit RF chain is configured to convert from a respective one of a plurality of transmit chain input signals to a respective one of a plurality of transmit RF signals within a transmit frequency band;

    a transmit path channel multiplexer, interposed between the one or more modulator cores and at least the plurality of transmit RF chains, wherein the transmit path channel multiplexer is configured to generate the plurality of transmit chain input signals from at least the plurality of transmit symbol streams;

    a plurality of directional antenna arrays, wherein each directional antenna array comprises a plurality of directional antenna sub-arrays, and wherein each directional antenna sub-array comprises a plurality of directional antenna elements; and

    a plurality of duplexer filters, wherein each duplexer filter comprises at least a receive band-select filter configured to selectively pass RF signals within the receive frequency band and a transmit band-select filter configured to selectively pass RF signals within the transmit frequency band, wherein each duplexer filter is couplable or coupled to at least one of the plurality of directional antenna sub-arrays, wherein the receive band-select filter of each duplexer filter is couplable or coupled to at least one of the plurality of receive RF chains, and wherein the transmit band-select filter of each duplexer filter is couplable or coupled to at least one of the plurality of transmit RF chains;

    wherein each of the plurality of directional antenna arrays is configured to operate over at least both of the transmit frequency band and the receive frequency band; and

    wherein each of the plurality of directional antenna arrays is horizontally offset relative to at least one other of the plurality of directional antenna arrays.

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