Closed loop multiple transmit, multiple receive antenna wireless communication system
First Claim
1. A wireless receiver for receiving signals from a transmitter, the transmitter comprising a plurality of transmit antennas for transmitting the signals which comprise respective streams of independent symbols and wherein interference occurs between the respective streams, the receiver comprising:
- a plurality of receive antennas for receiving the signals as influenced by a channel effect between the receiver and the transmitter;
circuitry for multiplying the signals times a conjugate transpose of an estimate of the channel effect and times a conjugate transpose of a linear basis transformation matrix;
circuitry for selecting the linear basis transformation matrix from a finite set of linear basis transformation matrices; and
circuitry for removing the interference between the respective streams.
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Accused Products
Abstract
A wireless receiver (74) for receiving signals from a transmitter (72). The transmitter comprises a plurality of transmit antennas (TAT1′, TAT2′) for transmitting the signals, which comprise respective independent streams of symbols. Additionally, interference occurs between the respective streams. The receiver comprises a plurality of receive antennas (RAT1′, RAT2′) for receiving the signals as influenced by a channel effect between the receiver and the transmitter. The receiver also comprises circuitry (80) for multiplying the signals times a conjugate transpose of an estimate of the channel effect and times a conjugate transpose of a linear basis transformation matrix. The receiver also comprises circuitry (84) for selecting the linear basis transformation matrix from a finite set of linear basis transformation matrices. Lastly, the receiver comprises circuitry (88) for removing the interference between the respective streams.
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Citations
59 Claims
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1. A wireless receiver for receiving signals from a transmitter, the transmitter comprising a plurality of transmit antennas for transmitting the signals which comprise respective streams of independent symbols and wherein interference occurs between the respective streams, the receiver comprising:
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a plurality of receive antennas for receiving the signals as influenced by a channel effect between the receiver and the transmitter;
circuitry for multiplying the signals times a conjugate transpose of an estimate of the channel effect and times a conjugate transpose of a linear basis transformation matrix;
circuitry for selecting the linear basis transformation matrix from a finite set of linear basis transformation matrices; and
circuitry for removing the interference between the respective streams. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A wireless communication system, comprising:
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a transmitter comprising a plurality of transmit antennas for transmitting signals which comprise respective streams of independent symbols and wherein interference occurs between the respective streams; and
a receiver for receiving signals from a transmitter, the transmitter comprising a plurality of transmit antennas for transmitting the signals which comprise respective streams of independent symbols and wherein interference occurs between the respective streams, the receiver comprising;
a plurality of receive antennas for receiving the signals as influenced by a channel effect between the receiver and the transmitter;
circuitry for multiplying the signals times a conjugate transpose of an estimate of the channel effect and times a conjugate transpose of a linear basis transformation matrix;
circuitry for selecting the linear basis transformation matrix from a finite set of linear basis transformation matrices; and
circuitry for removing the interference between the respective streams. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 40, 41)
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39. A method of operating a wireless receiver, comprising:
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receiving signals at a plurality of receive antennas and transmitted from a transmitter, the transmitter comprising a plurality of transmit antennas for transmitting the signals which comprise respective streams of independent symbols and wherein interference occurs between the respective streams and wherein the received signals are influenced by a channel effect between the receiver and the transmitter;
multiplying the signals times a conjugate transpose of an estimate of the channel effect and times a conjugate transpose of a linear basis transformation matrix;
selecting the linear basis transformation matrix from a finite set of linear basis transformation matrices; and
removing the interference between the respective streams.
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42. A wireless transmitter for transmitting signals to a receiver, comprising:
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a plurality of transmit antennas for transmitting the signals, the signals comprising respective streams of independent symbols and wherein interference occurs between the respective streams;
circuitry for multiplying symbols times a linear basis transformation matrix, wherein the signals are responsive to the multiplication times a linear basis transformation matrix; and
circuitry for selecting the linear basis transformation matrix in response to a communication received by the transmitter from the receiver via a feedback channel. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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Specification