Apparatus for controlling power of relay in amplify-forward relay system and method using the same
First Claim
1. An apparatus for controlling a power of a controlled relay, the apparatus comprising:
- a signal receiver which receives signals which are transmitted to a plurality of receiving antennas directly from a source or via at least one relay;
a channel information acquisition unit which acquires channel information between the source and the at least one relay, and between the at least one relay and the plurality of receiving antennas;
a power control signal generation unit which generates a power control signal, based on the acquired channel information and a signal-to-noise ratio (SNR) of at least one of the signals received; and
a relay power control unit which transmits the generated power control signal to the controlled relay to control a transmit signal power of the controlled relay,wherein the SNR corresponds to a maximum SNR of the signals received which is calculated before the signals received are combined, andwherein the power control signal generation unit generates a power control signal based on an eigenvector corresponding to a maximum generalized eigenvalue with respect to each of the at least one relay, based on the acquired channel information and the maximum SNR.
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Abstract
A method and apparatus for controlling a power of a relay are provided. The apparatus includes: a signal receiver which receives signals which are transmitted to a plurality of receiving antennas directly from a source or via at least one relay; a channel information acquirement unit which acquires channel information between the source and the at least one relay, and acquires channel information between the at least one relay and the plurality of receiving antennas; a power control signal generation unit which generates a power control signal, based on the acquired channel information and a maximum SNR; and a relay power control unit which transmits the generated power control signal to the relay and thereby controls a transmit signal power with respect to the at least one relay.
16 Citations
13 Claims
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1. An apparatus for controlling a power of a controlled relay, the apparatus comprising:
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a signal receiver which receives signals which are transmitted to a plurality of receiving antennas directly from a source or via at least one relay; a channel information acquisition unit which acquires channel information between the source and the at least one relay, and between the at least one relay and the plurality of receiving antennas; a power control signal generation unit which generates a power control signal, based on the acquired channel information and a signal-to-noise ratio (SNR) of at least one of the signals received; and a relay power control unit which transmits the generated power control signal to the controlled relay to control a transmit signal power of the controlled relay, wherein the SNR corresponds to a maximum SNR of the signals received which is calculated before the signals received are combined, and wherein the power control signal generation unit generates a power control signal based on an eigenvector corresponding to a maximum generalized eigenvalue with respect to each of the at least one relay, based on the acquired channel information and the maximum SNR. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of controlling a power of a controlled relay, the method comprising:
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receiving signals which are transmitted to a plurality of receiving antennas directly from a source or via at least one relay; acquiring channel information between the source and the at least one relay, and between the at least one relay and the plurality of receiving antennas; generating a power control signal, based on the acquired channel information and an SNR of at least one of the signals received; and transmitting the generated power control signal to the controlled relay to control a transmit signal power with respect to the controlled relay, wherein the SNR corresponds to a maximum SNR of the signals received which is calculated before the signals received are combined, and wherein the generating generates a power control signal based on an eigenvector corresponding to a maximum generalized eigenvalue with respect to each of the at least one relay, based on the acquired channel information and the maximum SNR. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A non-transitory computer-readable medium storing a program for implementing a method of controlling a power of a relay, the method comprising:
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receiving signals which are transmitted to a plurality of receiving antennas directly from a source or via at least one relay; acquiring channel information between the source and the at least one relay, and acquiring channel information between the at least one relay and the plurality of receiving antennas; generating a power control signal, based on the acquired channel information and a signal-to-noise ratio (SNR) of at least one of the signals received; and transmitting the generated power control signal to the relay and thereby controlling a transmit signal power with respect to the at least one relay, wherein the SNR corresponds to a maximum SNR of the signals received which is calculated before the signals received are combined, and wherein the generating generates a power control signal based on an eigenvector corresponding to a maximum generalized eigenvalue with respect to each of the at least one relay, based on the acquired channel information and the maximum SNR.
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Specification