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Optimal Interleaving Depth in STBC OFDM System with Distributed Transmit Antennas |
Guan Lu Shao Shi-hai Tang You-xi |
National Key Lab. of Science and Technology on Communication, University of Electronic Science and Technology of China, Chengdu 611731, China |
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Abstract Focusing on the STBC OFDM system where transmit power of data symbols are spreading on interleaving-grouped subcarriers of each distributed transmit antenna in Rayleigh fading channel, an optimal method for interleaving depth is proposed. According to the number of channel taps and the multi-path delays, the method searches the optimal interleaving depth to minimize the pair-wise error probability. Simulation results in distributed channel which is composed by M.1225 pedestrian test channel A and channel B show that the proposed algorithm has 1.5 dB gain at BER of 10-5 compared to conventional method using BPSK modulation in STBC system with two transmit antennas and one receive antenna.
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Received: 10 September 2010
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Corresponding Authors:
Tang You-xi
E-mail: tangyx@uestc.edu.cn
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