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Ground network for end-to-end beamforming

  • US 10,200,114 B2
  • Filed: 09/26/2017
  • Issued: 02/05/2019
  • Est. Priority Date: 04/10/2015
  • Status: Active Grant
First Claim
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1. A method of providing a communication service to user terminals distributed over a user coverage area via an end-to-end relay comprising multiple forward receive/transmit signal paths, the method comprising:

  • obtaining multiple forward beam signals comprising forward user data streams for transmission to a plurality of the user terminals grouped by multiple forward user beam coverage areas;

    identifying a forward beam weight matrix for end-to-end beamforming of transmissions from a plurality of access nodes at geographically distributed locations to the multiple forward user beam coverage areas via the end-to-end relay;

    generating respective access node-specific forward signals for transmission by the plurality of access nodes, each of the respective access node-specific forward signals comprising a composite of respective forward beam signals weighted by respective forward beamforming weights of the forward beam weight matrix; and

    transmitting respective forward uplink signals from the plurality of access nodes based on the respective access node-specific forward signals, wherein the respective forward uplink signals are pre-corrected to compensate for respective path delays and phase shifts between the plurality of access nodes and the end-to-end relay.

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