Apparatus and method for cooperative transmission in multi-antenna relay wireless communication system
First Claim
Patent Images
1. A receiving end apparatus in a multi-antenna relay wireless communication system using cooperative transmission, the receiving end apparatus comprising:
- an estimator configured to estimate a channel between a transmitting end and a relay station;
a reader configured to read channel gain information, which is feed-forwarded from the relay station, between the transmitting end and the relay station with respect to all antennas;
a feedback unit configured to determine a covariance matrix used to regulate power of a Transmit (Tx) signal with respect to all antennas of the transmitting end and a relay matrix used to process relay station signals from the relay station by using channel information received from the estimator and the reader, and to feed back information on the determined covariance and relay matrices; and
a detector configured to detect the Tx signal by combining a first signal received from the transmitting end at a first Tx time, a second signal received from the transmitting end at a second Tx time, and a relay station signal received from the relay station at the second Tx time.
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Abstract
An apparatus and method for cooperative transmission in a multi-antenna relay wireless communication system are provided. A receiving end includes an estimator, a reader, a feedback unit and a detector. According to the present invention, the receiving end receives the signal from both the transmitting end and the relay station. Therefore, a reception gain is obtained and a high throughput can be ensured.
7 Citations
24 Claims
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1. A receiving end apparatus in a multi-antenna relay wireless communication system using cooperative transmission, the receiving end apparatus comprising:
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an estimator configured to estimate a channel between a transmitting end and a relay station; a reader configured to read channel gain information, which is feed-forwarded from the relay station, between the transmitting end and the relay station with respect to all antennas; a feedback unit configured to determine a covariance matrix used to regulate power of a Transmit (Tx) signal with respect to all antennas of the transmitting end and a relay matrix used to process relay station signals from the relay station by using channel information received from the estimator and the reader, and to feed back information on the determined covariance and relay matrices; and a detector configured to detect the Tx signal by combining a first signal received from the transmitting end at a first Tx time, a second signal received from the transmitting end at a second Tx time, and a relay station signal received from the relay station at the second Tx time. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A receiving end apparatus in a multi-antenna relay wireless communication system using cooperative transmission, the receiving end apparatus comprising:
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an estimator configured to estimate a channel between a transmitting end and a relay station; a reader configured to read information on a Transmit (Tx) antenna of the transmitting end, wherein the information is feed-forwarded from the relay station and the Tx antenna has priority for the relay station; a feedback unit configured to select the at least one of Tx antenna of the transmitting end by using channel information provided from the estimator and the reader, for feeding back antenna selection information to the transmitting end, and to feed back channel information between the relay station and the receiving end to the relay station; and a detector configured to detect a Tx signal by combining a first signal received from the transmitting end at a first Tx time, a second signal received from the transmitting end at a second Tx time, and a relay station signal received from the relay station at the second Tx time. - View Dependent Claims (9)
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10. An operation method of a receiving end in a multi-antenna relay wireless communication system using cooperative transmission, the operation method comprising:
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estimating a channel between a transmitting end and a relay station; reading channel gain information, which is feed-forwarded from the relay station, between the transmitting end and the relay station with respect to all antennas; determining a covariance matrix used to regulate power of a Transmit (Tx) signal with respect to all antennas of the transmitting end and a relay matrix used to process relay station signals from the relay station by using channel information; feeding back information on the determined covariance and relay matrices; and detecting the Tx signal by combining a first signal received from the transmitting end at a first Tx time, a second signal received from the transmitting end at a second Tx time, and a relay station signal received from the relay station at the second Tx time. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An operation method of a receiving end in a multi-antenna relay wireless communication system using cooperative transmission, the operation method comprising:
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estimating a channel between a transmitting end and a relay station; reading information on a Transmit (Tx) antenna of the transmitting end, wherein the information is feed-forwarded from the relay station and the Tx antenna has priority for the relay station; selecting at least one Tx antenna of the transmitting end by using channel information provided as a result of estimating and reading; feeding back antenna selection information to the transmitting end, and feeding back channel information between the relay station and the receiving end to the relay station; and detecting a Tx signal by combining a first signal received from the transmitting end at a first Tx time, a second signal received from the transmitting end at a second Tx time, and a relay station signal received from the relay station at the second Tx time. - View Dependent Claims (17)
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18. A multi-antenna relay wireless communication system using cooperative transmission, the multi-antenna relay wireless communication system comprising:
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a receiving end configured to determine a covariance matrix used to regulate power of a Transmit (Tx) signal with respect to all antennas of the transmitting end and a relay matrix used to process relay station signals from a relay station by using channel information between a transmitting end and the relay station, between the transmitting end and the receiving end, and the relay station and the receiving end, and to feed back information on the determined covariance and relay matrices; the transmitting end configured to transmit a first signal at a first Tx time and a second signal at a second Tx time by regulating Tx power for each antenna according to the covariance matrix; and the relay station for configured to receive the first signal from the transmitting end at the first Tx time and transmit the received first signal at the second Tx time. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification