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Multi-beam co-channel Wi-Fi access point

  • US 9,385,793 B2
  • Filed: 03/16/2015
  • Issued: 07/05/2016
  • Est. Priority Date: 02/13/2013
  • Status: Active Grant
First Claim
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1. A system comprising:

  • one or more Wi-Fi transmit beamformers, each comprising a plurality of transmit antennas;

    one or more Wi-Fi receive beamformers, each comprising a plurality of receive antennas; and

    a number N of co-located co-channel Wi-Fi access points (APs), each of said Wi-Fi APs having Wi-Fi transmitters and receivers and connected to the Wi-Fi transmit beamformers and the Wi-Fi receive beamformers,wherein the Wi-Fi transmit beamformers and the Wi-Fi receive beamformers are configured to produce a plurality of directional beams of a common frequency, directed at a plurality of Wi-Fi user equipment (UE) devices such that the directional beams are sufficiently isolated from each other, so that at least some of the Wi-Fi UE devices communicate simultaneously with the plurality of Wi-Fi APS,wherein beam patterns of the transmit antennas exhibit contaminating transmit signals being an accumulated contribution of side lobes and back lobes, wherein the system further comprises amplitude/phase modules associated with said transmit antennas and null transmit module configured to receive a difference between signals received by said receive antenna and said contaminating transmit signals detected in the receiving circuitry and control said amplitude/phase modules so that transmit signal component in the receiver are reduced using accurate destructive interference manifested via closed loop.

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