  This paper proposes a novel time-frequency warped waveform for short symbols,
massive machine-type communication (mMTC), and internet of things (IoT)
applications. The waveform is composed of asymmetric raised cosine (RC) pulses
to increase the signal containment in time and frequency domains. The waveform
has low power tails in the time domain, hence better performance in the
presence of delay spread and time offsets. The time-axis warping unitary
transform is applied to control the waveform occupancy in time-frequency space
and to compensate for the usage of high roll-off factor pulses at the symbol
edges. The paper explains a step-by-step analysis for determining the roll-off
factors profile and the warping functions. Gains are presented over the
conventional Zero-tail Discrete Fourier Transform-spread-Orthogonal Frequency
Division Multiplexing (ZT-DFT-s-OFDM), and Cyclic prefix (CP) DFT-s-OFDM
schemes in the simulations section.
