C35. Wavelet-based SC-FDMA system

Recent research has shown that the Single Carrier Frequency Division Multiple Access (SC-FDMA) is an attractive technology for uplink broadband wireless communications, because it does not have the problems of Orthogonal Frequency Division Multiple Access (OFDMA) such as the large Peak-to-Average Power Ratio (PAPR). In this paper, an efficient transceiver scheme for the SC-FDMA system, using the wavelet transform, is proposed. In the proposed scheme, the Fast Fourier Transform (FFT) and its inverse (IFFT) are replaced by the Discrete Wavelet Transform (DWT) and its inverse (IDWT). Wavelet filter banks at the transmitter and the receiver have the ability to reduce distortion in the reconstructed signals, while retaining all the significant features present in the signals. The performance of the proposed scheme is investigated with different wireless channels. Simulation results show that the proposed scheme provides better performance, when compared to the conventional SC-FDMA, while the complexity of the system is slightly increased.