MULTI-INPUT MULTI-OUTPUT-ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING TRANSCEIVING METHOD AND APPARATUS
First Claim
1. A transmitting method comprising:
- arranging subcarriers to which data symbols have been allocated to respectively correspond to a plurality of transmission antennas, according to information from a receiver;
generating transmission signals by modulating the arranged subcarriers; and
transmitting the transmission signals to the receiver via corresponding plurality of transmission antennas.
2 Assignments
0 Petitions
Accused Products
Abstract
A multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) transceiving system is provided, in which an MIMO-OFDM receiver feeds back ordering information, such as the order of power intensities of reception signals of a plurality of reception antennas, to an MIMO-OFDM transmitter. The MIMO-OFDM transmitter arranges subcarriers, to which data symbols have been allocated, so that the subcarriers respectively correspond to a plurality of transmission antennas, according to the fed-back information. Thus, a specific substream can be transmitted via a transmission antenna having the greatest channel gain. Consequently, the probability of properly recovering the specific substream is greatly increased.
-
Citations
20 Claims
-
1. A transmitting method comprising:
-
arranging subcarriers to which data symbols have been allocated to respectively correspond to a plurality of transmission antennas, according to information from a receiver; generating transmission signals by modulating the arranged subcarriers; and transmitting the transmission signals to the receiver via corresponding plurality of transmission antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A computer readable recording medium that records a computer program for executing a transmitting method, the transmitting method comprising:
-
arranging subcarriers to which data symbols have been allocated to respectively correspond to a plurality of transmission antennas, according to information from a receiver; generating transmission signals by modulating the arranged subcarriers; and transmitting the transmission signals to the receiver via corresponding plurality of transmission antennas.
-
-
10. A transmitting apparatus comprising:
-
precoders which arrange subcarriers to which data symbols have been allocated, to respectively correspond to a plurality of transmission antennas, according to information from a receiver; inverse fast Fourier transformation (IFFT) units which generate transmission signals by performing IFFT operations on the arranged subcarriers; and transmission units which transmit the transmission signals to the receiver via the respective transmission antennas. - View Dependent Claims (14, 15, 17, 18)
-
-
11. A receiving method comprising:
-
receiving a plurality of signals from a transmitter via a plurality of reception antennas; measuring characteristics of the received signals and feeding information about an order of the measured characteristics back to the transmitter; and recovering data from the received signals using information previously provided to the transmitter. - View Dependent Claims (12, 13, 16)
-
-
19. A computer readable recording medium that records a computer program for executing a receiving method, the receiving method comprising:
-
receiving a plurality of signals from a transmitter via a plurality of reception antennas; measuring characteristics of the received signals and feeding back information about an order of the measured characteristics to the transmitter; and recovering data from the received signals using information previously provided to the transmitter.
-
-
20. A receiving apparatus comprising:
-
reception units which receive a plurality of signals from a transmitter via a plurality of reception antennas; feedback units which measure predetermined characteristics of the received signals and feed back information about an order of the measured characteristics to the transmitter; precoders which rearrange the subcarriers recovered from the received signals back to their original order according to the information previously provided to the transmitter; and symbol demappers which map data symbols allocated to the rearranged subcarriers into data corresponding to substreams.
-
Specification