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Registered METHOD OF DETECTING SPACE-TIME CODE IN MOBILE COMMUNICATION SYSTEM WITH 4 Tx ANTENNA
- Inventors
- Bang Young Jo, 김일민, Chang Wahn Yu, 박윤옥, Ahn Jee Hwan, Kim Daeho, Bahng Seungjae
- Application No.
- 11930013 (2007.10.30)
- Publication No.
- 20080137781 (2008.06.12)
- Registration No.
- 7899138 (2011.03.01)
- Country
- UNITED STATES
- Abstract
- The present invention relates to a method of detecting a space-time code in a mobile communication system. When detecting a space-time code B for a plurality of transmitting antennas, an ML (maximum likelihood) metric, which is generally calculated by using a specific structure of a matrix B, is defined as a new ML metric by reducing a variable of the ML metric. Two dependent sphere decoding processes are performed and an intersection of the decoding results is calculated, and a signal is detected from the ML metric. Therefore, since detection of the space-time code B for the plurality of transmitting antennas is performed by using the newly defined ML metric, an amount of matrix calculated can be reduced, and a calculation amount can be reduced by performing the two dependent sphere decoding processes. Further, since a detection order of symbols is changed according to a channel situation, it is possible to improve the performance of the system.
- KSP Keywords
- Communication system, Space time(ST), Space-time codes, maximum likelihood, mobile communication, mobile communication system, specific structure, sphere decoding, transmitting antennas