Adaptive transmission and receiving method and device in wireless communication system with multiple antennas
Disclosed is an adaptive transmit and receive method and device in a multiple-antenna wireless communication system. A transmit mode comprises different main transmit modes each of which includes one or both of a sub-transmit mode based on STBC and a sub-transmit mode based on SM. A receiver calculates an STBC performance parameter and a SM performance parameter, and a transmitter uses the parameters to determine a main transmit mode with maximum data rates and select a sub-transmit mode for minimizing power consumption. The transmitter channel-encodes, modulates and antenna-maps input data according to the selected transmit mode, and outputs results to the receiver. The receiver antenna/symbol-demodulates and channel-decodes the received data.
1. An adaptive communication method of a receiver for receiving data from a transmitter through a wireless channel in a wireless communication system, comprising:
receiving a signal from the transmitter through the wireless channel;
estimating a characteristic of the wireless channel using the signal received from the transmitter;
determining a parameter for adaptive transmit based on the signal received from the transmitter, the parameter being to be used for supporting determination of whether or not to use a transmit mode by the transmitter;
transmitting a feedback signal including the parameter to the transmitter through the wireless channel,
wherein the characteristic of the wireless channel includes signal to noise ratio (SNR) information, and
wherein the parameter includes channel coding information and space time block code (STBC) information.
2. The method of claim 1 , wherein the STBC information indicates whether or not to use STBC method.
3. The method of claim 1 , wherein the wireless channel is a multiple input multiple output (MIMO) channel.
4. An adaptive communication device of a receiver for receiving data from a transmitter through a wireless channel in a wireless communication system, comprising:
a receiver for receiving a signal from the transmitter through the wireless channel;
a channel estimator for estimating a characteristic of the wireless channel using the signal received from the transmitter;
an adaptive transmission parameter extractor for determining a parameter for adaptive transmit based on the signal received from the transmitter, the parameter being to be used for supporting determination of whether or not to use transmit mode by the transmitter;
a transmitter for transmitting a feedback signal including the parameter to the transmitter through the wireless channel,
wherein the characteristic of the wireless channel includes signal to noise ratio (SNR) information, and
wherein the parameter includes channel coding information and space time block code (STBC) information.
5. The device of claim 4 , wherein the STBC information indicates whether or not to use STBC method.
6. The device of claim 4 , wherein the wireless channel is a multiple input multiple output (MIMO) channel.
7. An adaptive communication method of a receiver for receiving data from a transmitter through a wireless channel in a wireless communication system, comprising:
receiving a signal from the transmitter through the wireless channel;
estimating a characteristic of the wireless channel using the signal received from the transmitter;
generating a first parameter including information to support determination of a transmit mode between a transmit diversity mode and a Spatial Multiplexing (SM) mode and a second parameter including information about a channel coding method and a modulation method; and
transmitting the first parameter and the second parameter to the transmitter through the wireless channel.
8. The method of claim 7 , further comprising:
extracting symbol information for each transmit antenna from the signal received from the wireless channel,
wherein the estimating the characteristic of the wireless channel estimates the characteristic of the wireless channel based on the symbol information.
9. An adaptive communication device for receiving data from a transmitter through a wireless channel in a wireless communication system, comprising:
a receiver for receiving a signal from the transmitter through the wireless channel;
a channel estimator for estimating a characteristic of the wireless channel using the signal received from the transmitter;
an adaptive transmission parameter extractor for extracting a first parameter including information to support determination of a transmit mode between a transmit diversity mode and a Spatial Multiplexing (SM) mode and a second parameter including information about a channel coding method and a modulation method; and
a transmitter for transmitting the first parameter and the second parameter to the transmitter through the wireless channel.
10. The device of claim 9 , further comprising:
an antenna/symbol demodulator for extracting symbol information for each transmit antenna from the signal received through the wireless channel;
wherein the channel estimator estimates a characteristic of the wireless channel based on the symbol information.