中文

Journal of Applied Sciences ›› 2004, Vol. 22 ›› Issue (4): 453-458.

• Articles • Previous Articles     Next Articles

Subspace-Tracking Channel Estimation for Training-Sequence-Based OFDM Systems with Transmitter Diversity

XU Xin1,2, CAI Yue-ming1, XU You-yun1   

  1. 1. Institute of Communications Engineering, PLAUST, Nanjing 210007, China;
    2. Network Technology Management Center of Communications, Jinan Military Area, Jinan 250002, China
  • Received:2003-07-13 Revised:2003-11-10 Online:2004-12-31 Published:2004-12-31

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Abstract: In training-sequence-based OFDM systems, a training sequence is inserted in the specific location of each slot in order to estimate the channel impulse response in the time-domain and carry out equalization in the frequency-domain. In this paper, we propose two training-sequence-based channel estimation approaches for OFDM systems with transmitter diversity by tracking the delay-subspace and the amplitudes of the CIR or its DFT. Combined with Wiener interpolation filtering technique simulations of an OFDM system with two-transmit-antennas-and-one-receive-antenna space-time block coding show the advantages of the approaches.

Key words: OFDM, training sequence, subspace tracking, channel estimation

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