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A study on the BER Performance Improvement by Oversampling of the Transmit Signal Waveform in OFDM  

Kim Jee bum (동의대학교 정보통신과)
Jeon Hyoung goo (동의대학교 정보통신과)
Jang Jong wook (동의대학교 정보통신과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.29, no.10C, 2004 , pp. 1378-1386 More about this Journal
Abstract
In this paper, we propose an OFDM scheme to increase the BER performance. The proposed OFDM scheme makes the baseband OFDM signal by using the oversampled OFDM signal values which are obtained by inserting N(=2$\^$k/) zeros and carrying out 2N point IFFT. In the demodulation part, the sampling operation for A/D conversion is carried out with the 2 times high sampling speed. 2 N point FFT is carried out for the data demodulation. In this paper, we show, with the mathematical method and the computer simulation, that the SNR of the proposed OFDM scheme is 3 dB higher than that of the conventional OFDM in the same AWGN channel conditions given.
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