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Detail
Registered METHOD AND APPARATUS FOR ESTIMATE TIMING ERROR AND FREQUENCY OFFSET OF MIMO SYSTEM
- Inventors
- Ma Zhangyong, Young-Il Kim
- Application No.
- 11636799 (2006.12.11)
- Publication No.
- 20070183518 (2007.08.09)
- Registration No.
- 7778338 (2010.08.17)
- Country
- UNITED STATES
- Abstract
- The present invention relates to a method and device for estimating a timing error and a frequency offset in the MIMO mobile communication system. In a system including a plurality of transmit antennas and a plurality of receive antennas, a predetermined preamble symbol is inserted into a frame to be transmitted by a transmitting device, and pseudo noise is multiplied to the preamble symbol, and result signal is transmitted through each transmit antenna. A receiving device receives the signal through each receive antenna, extracts a preamble symbol from the OFDM symbol, and multiplies local pseudo noise that corresponds to the pseudo noise used by the transmitting device and is shifted by the extracted preamble symbol. A timing error is estimated and compensated according to the correlation of the pseudo noise of the transmitting device and the local pseudo noise of the receiving device. A frequency offset is estimated and compensated according to the phase difference between the preamble symbols. Therefore, the system is realized in a simpler manner and timing error and frequency offset estimation and compensation performance is further improved.