On the Fast DHT Precoding of OFDM Signals over Frequency-Selective Fading Channels for Wireless Applications

Due to high power consumption and other problems, it is unlikely that orthogonal frequency-division multiplexing (OFDM) would be included in the uplink of future 6G standard. High OFDM systems motivated by peak-to-average ratio (PAPR) introduced inverse Fourier transform (IFFT) processing kernel time domain. Linear precoding symbols frequency domain using discrete Hartley (DHT) could used minimise PAPR problem, however, at cost increased complexity consumption. In this study, we computation DHT on transceiver schemes consequent We exploit involutory properties kernels process IFFT as a single-processing block, thus reducing system These also enable novel power-saving receiver design. compare results three standard scheme baseline; while improving efficiency Class-A amplifier from 4.16% 16.56%, bit error enhanced up 5 dB when 12—rate error-correction coding 7 with interleaving.