Generalized DFT-S-OFDM Waveforms Without Cyclic Prefix

Abstract:

This work examines extended discrete Fourier transform-spread-orthogonal frequency division multiplexing (G-DFT-s-OFDM) waveforms, which use an internal guard period to replace the cyclic prefix of classic OFDM/DFT-s-OFDM. Flexibility, spectral confinement, and a low peak-to-average power ratio are all advantages of such waveforms. Aspects of reference sequence design. A new estimator for the special zero-tail DFT-s-OFDM situation is proposed, and aspects relating to reference sequence design and mapping for channel estimation are thoroughly explored. We also discuss the prospect of using the internal guard period at each symbol for frequent channel state information updates, allowing for the tracking of rapidly changing propagation conditions.

Keywords: OFDM, DFT-s-OFDM, CP, ZT DFT-s-OFDM, UW DFT-s-OFDM.