Chirp-Convolved Data Transmission

We propose a multicarrier chirp waveform, which can be generated by a circular convolution between data modulation symbols and a transmit filter, and show that it can equivalently be represented as discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) with frequency domain chirp filter. The chirp is defined by a complex exponential function where the phase follows a second-degree polynomial and its coefficients can be chosen to maximize the performance on a fading channel and to generate sets of orthogonal signals. The results show that the waveform outperforms OFDM and DFT-s-OFDM in terms of bit error rate (BER) and block error rate (BLER) on a time-frequency selective channel.

Automated summary

A multicarrier chirp waveform is proposed in this study, defined by a complex exponential function with a phase following a second-degree polynomial, showing better performance in terms of bit error rate and block error rate on a time-frequency selective channel. The waveform can maximize performance on a fading channel and generate sets of orthogonal signals.