System and method for combining MIMO and mode-division multiplexing
First Claim
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.
1 Assignment
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Accused Products
Abstract
A communications system comprises first signal processing circuitry for receiving a plurality of input data streams and applying a different orthogonal function to each of the plurality of input data streams. Second signal processing circuitry processes 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 a 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. A MIMO transmitter transmits the 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. Each of the plurality of separate communications links go from one transmitting antenna of a plurality of transmitting antennas to each of a plurality of receiving antennas at a MIMO receiver.
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Citations
30 Claims
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1. A communications system, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for transmitting data over a communications link, comprising
mode division multiplexing a plurality of input data streams onto a carrier signal using mode division processing circuitry, the mode division multiplexing further comprising the steps of: -
receiving a plurality of input data streams; applying a different orthogonal function to each of the plurality of input data streams; multiplexing a first group of the plurality of input data streams having a first group of orthogonal functions applied thereto onto a first carrier signal; multiplexing a second group of the plurality of input data streams having a second group of orthogonal functions applied thereto onto a second carrier signal; temporally multiplexing the first carrier signal and the second carrier signal onto a third carrier signal to provide a mode division multiplexed carrier signal; transmitting, using a MIMO transmitter, the mode division multiplexed carrier signal including the first and the second groups of the plurality of input data streams over a plurality of communications links from the MIMO transmitter, each of the plurality of communications links transmitted from a separate transmitting antenna to a separate receiving antenna of 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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A communications system, comprising:
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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; a carrier signal generator for generating a carrier signal for each of the plurality of input data streams; a modulator for modulating each of the plurality of input data streams onto a separate carrier signal; orthogonal function processing circuitry for applying a different orthogonal function to each of the plurality of input data streams to provide a plurality of data streams having the different orthogonal function applied thereto; first 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 communications links from the MIMO transmitter, each of the plurality of communications links from one transmitting antenna of a plurality of transmitting antennas to each of a plurality of receiving antennas; a MIMO receiver including the plurality of receiving antennas for receiving the mode division multiplexed carrier signal over each of the plurality of communications links through the plurality of receiving antennas; wherein a combination of mode division multiplexing and MIMO transmission minimize interchannel crosstalk effects between the plurality of input data streams; second mode division processing circuitry for receiving the mode division multiplexed carrier signal and mode division demultiplexing mode division multiplexed carrier signal into the plurality of input data streams, the second mode division processing circuitry comprising; second signal processing circuitry for demultiplexing the mode division multiplexed carrier signal into 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; and third signal processing circuitry for removing the first and the second group of orthogonal functions from the first and the second groups of the plurality of input data streams respectively. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A communications system, comprising:
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first signal processing circuitry for receiving a 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 a 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; third signal processing circuitry for applying maximum ratio combining to the carrier signal to improve a signal to noise ratio of a transmitted carrier signal; and a MIMO transmitter for transmitting the carrier signal including the plurality of input data streams having the maximum ration combining applied thereto over a plurality of communications links, each of the plurality of communications links from one transmitting antenna a plurality of transmitting antennas to each of a plurality of receiving antennas at a MIMO receiver. - View Dependent Claims (27, 28, 29, 30)
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Specification