中文

Journal of Applied Sciences ›› 2006, Vol. 24 ›› Issue (4): 433-436.

• Research Notes • Previous Articles     Next Articles

Effect of Antenna Correlation on ST-FSK System Performance

JIANG Hui-juan1, TAN Xiao2, SHEN Yue-hong1   

  1. 1. Institute of Communication Engineering, PLA University of Science and Technology, Nanjing 210007, China;
    2. Research Institute No. 63, PLA University of Science and Technology, Nanjing 210007, China
  • Received:2005-05-10 Revised:2005-09-06 Online:2006-07-31 Published:2006-07-31

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Abstract: Space-time frequency keying (ST-FSK) can be merged naturally into frequency-hopping communication systems.Based on a previous study, this paper presents an incoherent ML decision metric in the receiver with knowledge of transmitter antenna correlation, and discusses the relationship between correlation factor, SNR, and reliability index for binary ST-FSK and quaternary ST-FSK in the presence of antenna correlation.The theoretical analysis employs random variable decomposition.Simulation results show that the presence of transmitting antenna correlation, which is equivalent to destruction of unitary characteristics, imposes extra power cost on the performance of ST-FSK systems.The corresponding power cost increases nonlinearly with correlation factor, but makes little difference for binary ST-FSK and quaternary ST-FSK.

Key words: incoherent maximum likelihood (ML) detector, antenna correlation, space-time frequency-shift keying

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