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System and method for combining MIMO and mode-division multiplexing

  • US 10,530,435 B2
  • Filed: 04/24/2018
  • Issued: 01/07/2020
  • Est. Priority Date: 10/13/2014
  • Status: Active Grant
First Claim
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1. A communications system, comprising:

  • mode division multiplexing circuitry for receiving a plurality of input data streams and mode division multiplexing the plurality of input data streams onto a carrier signal, the mode division multiplexing circuitry comprising;

    first signal processing circuitry for receiving the plurality of input data streams and applying a different orthogonal function to each of the plurality of input data streams;

    second signal processing circuitry for processing each of the plurality of input data streams having the different orthogonal function applied thereto to multiplex a first group of the plurality of input data streams having a first group of orthogonal functions applied thereto onto the carrier signal and to multiplex a second group of the plurality of input data streams having a second group of orthogonal functions applied thereto onto the carrier signal to provide a mode division multiplexed carrier signal;

    a MIMO transmitter for transmitting the mode division multiplexed carrier signal including the first group of the plurality of input data streams having the first group of orthogonal functions applied thereto and the second group of the plurality of input data streams having the second group of orthogonal functions applied thereto over a plurality of separate communications links from the MIMO transmitter, each of the plurality of separate communications links from one transmitting antenna of a plurality of transmitting antennas to each of a plurality of receiving antennas at a MIMO receiver; and

    wherein a combination of mode division multiplexing and MIMO transmission minimize interchannel crosstalk effects between the plurality of input data streams.

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