System and method for combining MIMO and mode-division multiplexing
First Claim
1. A communications system, comprising:
- first signal processing circuitry for;
processing each of a plurality of input data streams to generate a plurality of parallel pairs of data streams including an in-phase stream (I) and a quadrature phase stream (Q) for each of the plurality of input data streams,modulating each of the plurality of pairs of data streams with a selected one of at least three mutually orthogonal functions and each of the plurality of parallel pairs at a different signal width, respectively, to generate a plurality of data signals, each associated with one of the plurality of pairs of data streams, andgenerating a plurality of composite data streams by overlaying at least one first data signal of the plurality of data signals in a first layer with at least one second data signal of the plurality of data signals in a second layer;
second signal processing circuitry for receiving the plurality of composite data streams and applying a different orthogonal function to each of the plurality of composite data streams;
third signal processing circuitry for processing each of the plurality of composite data streams having the different orthogonal function applied thereto to multiplex a first group of the plurality of composite 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 composite data streams having a second group of orthogonal functions applied thereto onto the carrier signal;
a MIMO transmitter for transmitting the carrier signal including the first group of the plurality of composite data streams having the first group of orthogonal functions applied thereto and the second group of the plurality of composite 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 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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Accused Products
Abstract
A communications system includes 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 locate a first group of the plurality of input data streams having a first orthogonal function applied thereto onto a carrier signal and locates a second group of the plurality of input data streams having a second orthogonal function applied thereto onto the carrier signal. A transmitter transmits the carrier signal including the first group of the plurality of input data streams having the first orthogonal function applied thereto and the second group of the plurality of input data streams having the second orthogonal function applied thereto over a plurality of communications links from a plurality of transmitting antennas.
63 Citations
30 Claims
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1. A communications system, comprising:
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first signal processing circuitry for; processing each of a plurality of input data streams to generate a plurality of parallel pairs of data streams including an in-phase stream (I) and a quadrature phase stream (Q) for each of the plurality of input data streams, modulating each of the plurality of pairs of data streams with a selected one of at least three mutually orthogonal functions and each of the plurality of parallel pairs at a different signal width, respectively, to generate a plurality of data signals, each associated with one of the plurality of pairs of data streams, and generating a plurality of composite data streams by overlaying at least one first data signal of the plurality of data signals in a first layer with at least one second data signal of the plurality of data signals in a second layer; second signal processing circuitry for receiving the plurality of composite data streams and applying a different orthogonal function to each of the plurality of composite data streams; third signal processing circuitry for processing each of the plurality of composite data streams having the different orthogonal function applied thereto to multiplex a first group of the plurality of composite 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 composite data streams having a second group of orthogonal functions applied thereto onto the carrier signal; a MIMO transmitter for transmitting the carrier signal including the first group of the plurality of composite data streams having the first group of orthogonal functions applied thereto and the second group of the plurality of composite 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 from one transmitting antenna of a plurality of transmitting antennas to each of a plurality of receiving antennas at a MIMO receiver. - 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
receiving a plurality of input data streams; -
processing each of a plurality of input data streams to generate a plurality of parallel pairs of data streams including an in-phase stream (I) and a quadrature phase stream (Q) for each of the plurality of input data streams, modulating each of the plurality of pairs of data streams with a selected one of at least three mutually orthogonal functions and each of the plurality of parallel pairs at a different signal width, respectively, to generate a plurality of data signals, each associated with one of the plurality of pairs of data streams, generating a plurality of composite data streams by overlaying at least one first data signal of the plurality of data signals in a first layer with at least one second data signal of the plurality of data signals in a second layer; applying a different orthogonal function to each of the plurality of composite data streams; multiplexing a first group of the plurality of composite data streams having a first group of orthogonal functions applied thereto onto a carrier signal; multiplexing a second group of the plurality of composite data streams having a second group of orthogonal functions applied thereto onto the carrier signal; and transmitting the carrier signal including the first and the second groups of the plurality of composite streams over a plurality of communications links, each of the communications links transmitted from a separate transmitting antenna. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A communications system, comprising:
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first signal processing circuitry for; processing each of a plurality of input data streams to generate a plurality of parallel pairs of data streams including an in-phase stream (I) and a quadrature phase stream (Q) for each of the plurality of input data streams, modulating each of the plurality of pairs of data streams with a selected one of at least three mutually orthogonal functions and each of the plurality of parallel pairs at a different signal width, respectively, to generate a plurality of data signals, each associated with one of the plurality of pairs of data streams, and generating a plurality of composite data streams by overlaying at least one first data signal of the plurality of data signals in a first layer with at least one second data signal of the plurality of data signals in a second layer; orthogonal function processing circuitry for applying a different orthogonal function to each of the separate composite data streams to provide a plurality of composite data streams having the different orthogonal function applied thereto; second signal processing circuitry for processing each of the plurality of composite data streams having the different orthogonal function applied thereto to multiplex a first group of the plurality of composite 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 composite data streams having a second group of orthogonal functions applied thereto onto the carrier signal; a MIMO transmitter for transmitting the carrier signal including the first group of the plurality of composite data streams having the first group of orthogonal functions applied thereto and the second group of the plurality of composite data streams having the second group of orthogonal functions applied thereto over a plurality of communications links 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 of a MIMO receiver; a receiver for receiving the carrier signal over each of the plurality of communications links through the plurality of receiving antennas; third signal processing circuitry for demultiplexing the first group of the plurality of composite data streams having the first group of orthogonal functions applied thereto from the second group of the plurality of composite data streams having the second group of orthogonal functions applied thereto; and fourth 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 composite 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; processing each of a plurality of input data streams to generate a plurality of parallel pairs of data streams including an in-phase stream (I) and a quadrature phase stream (Q) for each of the plurality of input data streams, modulating each of the plurality of pairs of data streams with a selected one of at least three mutually orthogonal functions and each of the plurality of parallel pairs at a different signal width, respectively, to generate a plurality of data signals, each associated with one of the plurality of pairs of data streams, generating a plurality of composite data streams by overlaying at least one first data signal of the plurality of data signals in a first layer with the at least one second data signal of the plurality of data signals in a second layer; second signal processing circuitry for receiving the plurality of composite data streams and applying a different orthogonal function to each of the plurality of composite data streams; third signal processing circuitry for processing each of the plurality of composite data streams having the different orthogonal function applied thereto to multiplex a first group of the plurality of composite 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 composite data streams having a second group of orthogonal functions applied thereto onto the carrier signal; fourth 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 composite data streams having the maximum ration combining applied thereto over a plurality of communications links, each of the plurality of separate 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