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Analysis of Smart Antenna Performance Improving the Robustness of OFDM to Rayleigh Fading  

Hong, Young-Jin (Tongmyong University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.48, no.4, 2011 , pp. 53-60 More about this Journal
Abstract
In order to augment the robustness of OFDM system to Rayleigh multipath fading, there exist two smart antenna algorithms, namely, Pre-FFT smart antenna and Post-FFT smart antenna. After the mathematical modeling of both smart antenna algorithms, computer simulations have been carried to compare and analyze the performance of generalized eigen problem based Pre-FFT algorithm and the performance of Wiener solution based Post-FFT algorithm. It has been shown that the Post-FFT smart antenna far outperforms the Pre-FFT smart antenna due to the computational complexities. Especially it is so when the multipath signal arrives at beyond the guard interval and a rich co-channel interferer is introduced. Performance of a subcarrier clustering method proposed to lessen the computing load has been compared to that of a typical Wiener solution based Post-FFT smart antenna. Performance comparison between MRC(Maximum Ratio Combining) diversity based Post-FFT algorithm and typical Post-FFT algorithm has also been carried.
Keywords
Rayleigh fading; robustness; weight vector; impulse response; co-channel;
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Times Cited By KSCI : 1  (Citation Analysis)
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