Multi-input multi-output-orthogonal frequency division multiplexing transceiving method and apparatus

• US 8,457,220 B2
• Filed: 07/31/2007
• Issued: 06/04/2013
• Est. Priority Date: 09/15/2006
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation, Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Suh, Jung-hoon, Fujii, Masaaki, Kim, Sung-jin, Kim, Ho-jin
• Primary Examiner(s): Burd, Kevin M
• Application Number:
  US11/830,991
• Publication Number:
  US 20100027688A1
• Time in Patent Office: 2,135 Days
• Field of Search: 375/259, 375/260, 375/295, 375/296, 375/316, 375/346, 375/267
• US Class Current: 375/260
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0619 using feedback from receiving side feedback signaling for adaptive modulation/coding H04L1/0001
• CPC Class Codes: H04L 2025/03426 transmission using multiple-input and multiple-output channels
• CPC Class Codes: H04L 25/03006 Arrangements for removing intersymbol interference
• CPC Class Codes: H04L 27/2626 Arrangements specific to the transmitter only
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01

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.

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 regarding an order of reception signals of a plurality of reception antennas of one receiver from the one receiver;

generating transmission signals by modulating the arranged subcarriers; and

transmitting the transmission signals to the one receiver via corresponding plurality of transmission antennas,

wherein the arranging the subcarriers comprises arranging each of the subcarriers from an original order into the order of the reception signals of the reception antennas of the one receiver represented by the information, for each of the transmission antennas corresponding to the reception antennas, and

wherein a number of subcarriers transmitted to each of the reception antennas is the same.

2. The transmitting method of claim 1, wherein the information represents an order of power intensities of the reception signals of reception antennas, measured by the one receiver.

3. The transmitting method of claim 1, wherein the information represents an order of signal interference to noise ratios (SINRs) of the reception signals of reception antennas, measured by the one receiver.

4. The transmitting method of claim 1, wherein:

the information represents an order of predetermined characteristics of the reception signals of at least one of the reception antennas of the one receiver; and

the arranging the subcarriers comprises arranging at least one of the subcarriers to correspond to at least one of the transmission antennas, according to the information.

5. The transmitting method of claim 1, wherein:

the information is provided for blocks,

a first block of the blocks corresponds to a first collection of subcarriers; and

the first collection of subcarriers is arranged to correspond to a first transmission antenna of the plurality of transmission antennas, according to the information.

6. The transmitting method of claim 1, wherein the arranging of the subcarriers comprises generating a precoding matrix based on the information and performing a precoding operation of multiplying the precoding matrix by the subcarriers to arrange the subcarriers.

7. The transmitting method of claim 1, wherein in the generating the transmission signals, the arranged subcarriers are modulated by performing inverse fast Fourier transformation (IFFT) operations on the arranged subcarriers.

8. The transmitting method of claim 1, wherein the subcarriers have orthogonal frequencies.

9. A non-transitory 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 regarding an order of reception signals of a plurality of reception antennas of one receiver from the one receiver;

generating transmission signals by modulating the arranged subcarriers; and

transmitting the transmission signals to the one receiver via corresponding plurality of transmission antennas,

wherein the arranging the subcarriers comprises arranging each of the subcarriers from an original order into the order of the reception signals of the reception antennas of the one receiver represented by the information, for each of the transmission antennas corresponding to the reception antennas, and

wherein a number of subcarriers transmitted to each of the reception antennas is the same.

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 regarding an order of reception signals of a plurality of reception antennas of one receiver from the one 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 one receiver via the respective transmission antennas,

wherein the precoders arrange each of the subcarriers from an original order into the order of the reception signals of the reception antennas of the one receiver represented by the information, for each of the transmission antennas corresponding to the reception antennas, and

wherein a number of subcarriers transmitted to each of the reception antennas is the same.

14. The receiving method of claim 10, wherein the information represents an order of predetermined characteristics of the received signals of at least one of the reception antennas of the one receiver.

15. The receiving method of claim 10, wherein the information is provided for blocks, the blocks corresponding to collections of subcarriers.

17. The receiving method of claim 14, further comprising recovering the subcarriers to which the data symbols have been allocated, by performing fast Fourier transformation on the received signals.

18. The receiving method of claim 10, wherein the subcarriers have orthogonal frequencies.

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 received signals of a plurality of reception antennas of one receiver for the measured characteristics back to the transmitter; and

recovering data from the received signals using information previously provided to the transmitter,

wherein the recovering the data comprises rearranging each of the subcarriers, recovered from the received signals, which are arranged in an order of the received signals of the reception antennas of the one receiver represented by the information previously provided, for each of transmission antennas corresponding to the reception antennas, back to their original order according to the information previously provided, and

wherein a number of subcarriers received by each of the reception antennas is the same.

12. The receiving method of claim 11, wherein the information represents an order of power intensities of the received signals of reception antennas, measured by the one receiver.

13. The receiving method of claim 11, wherein the information represents an order of signal interference to noise ratios (SINR) of the received signals of reception antennas, measured by the one receiver.

16. The receiving method of claim 11, wherein the recovering the data further comprises:

mapping data symbols allocated to the rearranged subcarriers into data corresponding to substreams.

19. A non-transitory 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 received signals of a plurality of reception antennas of one receiver for the measured characteristics to the transmitter; and

recovering data from the received signals using information previously provided to the transmitter,

wherein the recovering the data comprises rearranging each of the subcarriers recovered from the received signals, which are arranged in an order of the received signals of the reception antennas of the one receiver represented by the information previously provided, for each of transmission antennas, corresponding to the reception antennas, back to their original order according to the information previously provided, and

wherein a number of subcarriers received by each of the reception antennas is the same.

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 received signals of a plurality of reception antennas of one receiver for the measured characteristics to the transmitter;

predecoders 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,

wherein the predecoders rearrange each of the subcarriers recovered from the received signals, which are arranged in an order of the received signals of the reception antennas of the one receiver represented by the information previously provided, for each of transmission antennas corresponding to the reception antennas, back to their original order according to the information previously provided, and

wherein a number of subcarriers received by each of the reception antennas is the same.