Zero tail filter bank spread OFDM

Abstract

Waveforms proposed for future communication systems aim at fulfilling the demanding requirements of the next generation of 5G applications. In this paper, an enhancement over Zero Tail Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (ZT DFT-S-OFDM) is proposed. The presented Zero Tail Filter Bank Spread OFDM (ZT FB-S-OFDM) replaces the discrete Fourier transform (DFT) block with a filter bank (FB) block. The performance of the conventional system is degraded due to the non-perfect zero-tails. The proposed system suppresses the power over the zero-tails by using raised cosine (RC) shaped pulses near the zero-tails. An implementation scheme for the transmitter and the receiver is proposed. It is shown that suppressing the power over the zero-tail enhances the system bit error rate (BER) performance. Furthermore, results show extra improvements in the peak-to-average power ratio (PAPR) and out-of-band emission (OOBE) performances.