Apparatus and method for controlling a transmission scheme according to channel state in a communication system
First Claim
1. A method for controlling a transmission scheme of a transmitter according to a channel state in a communication system where the transmitter has M transmit antennas and a receiver has N receive antennas, comprising the steps of:
- processing data in a transmission scheme selected from among a plurality of transmission schemes, and transmitting the processed data to the receiver by the transmitter;
receiving the data from the transmitter, estimating the channel state, selecting a transmission scheme according to the channel state corresponding to the channel state estimation result, and feeding back to the transmitter transmission scheme information indicating the selected transmission scheme by the receiver; and
determining the transmission scheme corresponding to the received transmission scheme information by the transmitter.
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Accused Products
Abstract
Disclosed is a transmission scheme for a transmitter according to a channel state in a communication system where the transmitter has M transmit antennas and a receiver has N receive antennas. Upon the input of data, the transmitter processes the data in a transmission scheme selected from among a plurality of transmission schemes, and transmits the processed data to the receiver. The receiver estimates the channel state of the received signal, selects a transmission scheme according to a channel state corresponding to the channel state estimation result, and feeds back to the transmitter transmission scheme information indicating the selected transmission scheme. The transmitter determines the transmission scheme corresponding to the received transmission scheme information.
48 Citations
23 Claims
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1. A method for controlling a transmission scheme of a transmitter according to a channel state in a communication system where the transmitter has M transmit antennas and a receiver has N receive antennas, comprising the steps of:
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processing data in a transmission scheme selected from among a plurality of transmission schemes, and transmitting the processed data to the receiver by the transmitter;
receiving the data from the transmitter, estimating the channel state, selecting a transmission scheme according to the channel state corresponding to the channel state estimation result, and feeding back to the transmitter transmission scheme information indicating the selected transmission scheme by the receiver; and
determining the transmission scheme corresponding to the received transmission scheme information by the transmitter. - View Dependent Claims (2, 3, 4)
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5. A method for controlling a transmission scheme of a transmitter according to a channel state in a communication system where the transmitter has M transmit antennas and a receiver has N receive antennas, comprising the steps of:
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processing data in a transmission scheme selected from among a plurality of transmission schemes, and transmitting the processed data to the receiver by the transmitter;
receiving the data from the transmitter, estimating the channel state, and feeding back to the transmitter channel state information corresponding to the channel state estimation result by the receiver, and selecting one of the plurality of the transmission schemes corresponding to the received channel state information by the transmitter. - View Dependent Claims (6, 7, 8)
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9. An apparatus for controlling a transmission scheme of a transmitter according to a channel state in a communication system where the transmitter has M transmit antennas and a receiver has N receive antennas, comprising:
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the transmitter for processing data in a transmission scheme selected from among a plurality of transmission schemes, transmitting the processed data to the receiver, and determining a transmission scheme corresponding to the transmission scheme information received from the receiver; and
the receiver for receiving the signal from the transmitter, estimating the channel of the signal, selecting a transmission scheme according to the estimated channel state corresponding to the channel state estimation result, and feeding back to the transmitter the transmission scheme information indicating the selected transmission scheme. - View Dependent Claims (10, 11, 12, 13)
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14. An apparatus for controlling a transmission scheme of a transmitter according to a channel state in a communication system where the transmitter has M transmit antennas and a receiver has N receive antennas, comprising:
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the transmitter for processing data a transmission scheme selected from among a plurality of transmission schemes, transmitting the processed data to a receiver, and selecting one of the plurality of transmission schemes corresponding to the channel state information received from the receiver; and
the receiver for receiving the data from the transmitter, estimating the channel state, and feeding back to the transmitter the channel state information corresponding to the channel state estimation result. - View Dependent Claims (15, 16, 17)
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18. A method of controlling a transmission scheme of a transmitter according to a channel state in a transmitter in a communication system, comprising the steps of:
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processing data in a transmission scheme selected from among a plurality of transmission schemes, and transmitting the processed data to a receiver;
receiving from the receiver transmission scheme information indicating a transmission scheme determined according to the channel state between the transmitter and the receiver; and
determining the transmission scheme corresponding to the received transmission scheme information.
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19. A method of controlling a transmission scheme of a transmitter according to a channel state in a transmitter in a communication system, comprising the steps of:
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processing data in a transmission scheme selected from among a plurality of transmission schemes, and transmitting the processed data to a receiver;
receiving from the receiver channel state information indicating the channel state between the transmitter and the receiver; and
determining a transmission scheme corresponding to the received channel state information.
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20. A method of controlling a transmission scheme of a transmitter according to a channel state in a receiver in a communication system, comprising the steps of:
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receiving a signal from a transmitter and detecting the channel state by estimating the channel state of the signal;
selecting one of a plurality of transmission schemes available to the transmitter according to the channel state; and
feeding back to the transmitter transmission scheme information indicating the selected transmission scheme.
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21. An apparatus for controlling a transmission scheme of a transmitter according to a channel state in a communication system, comprising:
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a data processor for processing data in a transmission scheme selected from among a plurality of transmission schemes;
a radio frequency (RF) processor for transmitting the processed data to a receiver; and
a controller for selecting a transmission scheme and, upon receiving from the receiver transmission scheme information indicating a transmission scheme determined according to the channel state between the transmitter and the receiver, selecting the transmission scheme in correspondence with the transmission scheme information.
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22. An apparatus for controlling a transmission scheme of a transmitter according to a channel state in a communication system, comprising:
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a data processor for processing data in a transmission scheme selected from among a plurality of transmission schemes;
a radio frequency (RF) processor for transmitting the processed data to a receiver; and
a controller for selecting a transmission scheme and, upon receiving from the receiver channel state information indicating the channel state between the transmitter and the receiver, selecting a transmission scheme in correspondence with the channel state information.
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23. An apparatus for controlling a transmission scheme of a transmitter according to a channel state in a communication system, comprising:
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a radio frequency (RF) processor for receiving a signal from a transmitter and detecting the channel state by estimating the channel of the signal;
a data processor for selecting one of a plurality of transmission schemes available to the transmitter according to the channel state; and
a feedback unit for feeding back to the transmitter transmission scheme information indicating the selected transmission scheme.
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Specification