Transmit antenna multi-mode tracking
First Claim
1. A method for use in wireless communication between a transmitter having plural transmit antennas and a receiver having plural receive antennas, said method comprising:
- (a) simultaneously transmitting to the receiver a first data stream using a first transmit antenna weight vector and a second data stream using a second transmit antenna weight vector;
(b) transmitting to the receiver a first perturbation signal corresponding to the first transmit antenna weight vector and a second perturbation signal corresponding to the second transmit antenna weight vector;
(c) receiving from the receiver feedback regarding the first transmit antenna weight vector and the second transmit antenna weight vector; and
(d) utilizing the feedback to modify the first transmit antenna weight vector and the second transmit antenna weight vector,wherein at least two weights in the first transmit antenna weight vector and at least two weights in the second transit antenna weight vector are non-zero.
3 Assignments
0 Petitions
Accused Products
Abstract
Provided are methods and apparatuses for use in wireless communication between a transmitter having plural transmit antennas and a receiver having plural receive antennas. A first data stream using a first transmit antenna weight vector and a second data stream using a second transmit antenna weight vector simultaneously are transmitted to the receiver. In addition, a first perturbation signal corresponding to the first transmit antenna weight vector and a second perturbation signal corresponding to the second transmit antenna weight vector are transmitted. Feedback regarding the first transmit antenna weight vector and the second transmit antenna weight vector is received from the receiver and is utilized to modify the first transmit antenna weight vector and the second transmit antenna weight vector.
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Citations
24 Claims
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1. A method for use in wireless communication between a transmitter having plural transmit antennas and a receiver having plural receive antennas, said method comprising:
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(a) simultaneously transmitting to the receiver a first data stream using a first transmit antenna weight vector and a second data stream using a second transmit antenna weight vector; (b) transmitting to the receiver a first perturbation signal corresponding to the first transmit antenna weight vector and a second perturbation signal corresponding to the second transmit antenna weight vector; (c) receiving from the receiver feedback regarding the first transmit antenna weight vector and the second transmit antenna weight vector; and (d) utilizing the feedback to modify the first transmit antenna weight vector and the second transmit antenna weight vector, wherein at least two weights in the first transmit antenna weight vector and at least two weights in the second transit antenna weight vector are non-zero. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for use in wireless communication between a transmitter having plural transmit antennas and a receiver having plural receive antennas, said method comprising:
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(a) receiving plural input signals, one input signal from each receive antenna; (b) decoding from each input signal plural pilot signals, one pilot signal corresponding to each of plural data stream signals; (c) estimating a modified channel gain matrix based on the pilot signals decoded in step (b), wherein the modified channel gain matrix reflects actual channel gains between the transmitter and the receiver and any transmit antenna weight vector, which has at least two non-zero weights, applied by the transmitter; and (d) using the modified channel gain matrix to obtain the plural data stream signals, wherein the pilot signal is transmitted using a perturbation vector, which is added to the transmit antenna weight vector depending upon a feedback from the receiver. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method for use in wireless communication between a transmitter having plural transmit antennas and a receiver having plural receive antennas, said method comprising:
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(a) receiving plural input signals, one input signal from each receive antenna; (b) decoding from each input signal plural pilot signals, one pilot signal corresponding to each of the plural transmit antennas at the transmitter; (c) estimating a channel gain matrix based on the pilot signals decoded in step (b), wherein the channel gain matrix reflects channel gains between the transmitter and the receiver; (d) selecting a set of transmit antenna weight vectors, each of which has at least two non-zero weights, for simultaneously transmitting plural data stream signals based on the channel gain matrix; and (e) transmitting information to identify the set of transmit antenna weight vectors to the transmitter, wherein the pilot signal is transmitted using a perturbation vector, which is added to the transmit antenna weight vector depending upon a feedback from the receiver. - View Dependent Claims (19, 20, 21)
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22. An apparatus for use in wireless communication between a transmitter having plural transmit antennas and a receiver having plural receive antennas, said apparatus comprising:
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(a) means for simultaneously transmitting to the receiver a first data stream using a first transmit antenna weight vector and a second data stream using a second transmit antenna weight vector; (b) means for transmitting a first perturbation signal corresponding to the first transmit antenna weight vector and a second perturbation signal corresponding to the second transmit antenna weight vector; (c) means for receiving from the receiver feedback regarding the first transmit antenna weight vector and the second transmit antenna weight vectors; and (d) means for utilizing the feedback to modify the first transmit antenna weight vector and the second transmit antenna weight vector, wherein at least two weights in the first transmit antenna weight vector and at least two wights in the second transmit antenna weight vector are non-zero.
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23. An apparatus for use in wireless communication between a transmitter having plural transmit antennas and a receiver having plural receive antennas, said apparatus comprising:
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(a) means for receiving plural input signals, one input signal from each receive antenna; (b) means for decoding from each input signal plural pilot signals, one pilot signal corresponding to each of the plural data stream signals; (c) means for estimating a modified channel gain matrix based on the pilot signals decoded by said means (b), wherein the modified channel gain matrix reflects actual channel gains between the transmitter and the receiver and any transmit antenna weight factor, which has at least two non-zero weights, applied by the transmitter; and (d) means for using the modified channel gain matrix to obtain the plural data stream signals, wherein the pilot signal is transmitted using a perturbation vector, which is added to the transmit antenna weight vector depending upon a feedback from the receiver.
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24. An apparatus for use in wireless communication between a transmitter having plural transmit antennas and a receiver having plural receive antennas, said apparatus comprising:
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(a) means for receiving plural input signals, one input signal from each receive antenna; (b) means for decoding from each input signal plural pilot signals, one pilot signal corresponding to each of the plural transmit antennas at the transmitter; (c) means for estimating a channel gain matrix based on the pilot signals decoded by said means (b), wherein the channel gain matrix reflects channel gains between the transmitter and the receiver; (d) means for selecting a set of transmit antenna weight vectors, each of which has at least two non-zero weights, for simultaneously transmitting plural data stream signals based on the channel gain matrix; and (e) means for transmitting information to identify the set of transmit antenna weight vectors to the transmitter, wherein the pilot signal is transmitted using a perturbation vector, which is added to the transmit antenna weight vector depending upon a feedback from the receiver.
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Specification