Trimming the Fat from OFDM: Pilot- and CP-less Communication with End-to-end Learning

• URL: http://arxiv.org/abs/2101.08213v2
• Date: Fri, 22 Jan 2021 09:11:48 GMT
• Title: Trimming the Fat from OFDM: Pilot- and CP-less Communication with End-to-end Learning
• Authors: Fay\c{c}al Ait Aoudia and Jakob Hoydis
• Abstract summary: Orthogonal frequency division multiplexing (OFDM) is one of the dominant waveforms in wireless communication systems. It suffers from a loss of spectral efficiency as it requires a cyclic prefix (CP) to mitigate inter-symbol interference (ISI) and pilots to estimate the channel. We propose in this work to address these drawbacks by learning a neural network (NN)-based receiver jointly with a constellation geometry and bit labeling at the transmitter.
• Score: 16.26230847183709
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Orthogonal frequency division multiplexing (OFDM) is one of the dominant waveforms in wireless communication systems due to its efficient implementation. However, it suffers from a loss of spectral efficiency as it requires a cyclic prefix (CP) to mitigate inter-symbol interference (ISI) and pilots to estimate the channel. We propose in this work to address these drawbacks by learning a neural network (NN)-based receiver jointly with a constellation geometry and bit labeling at the transmitter, that allows CP-less and pilotless communication on top of OFDM without a significant loss in bit error rate (BER). Our approach enables at least 18% throughput gains compared to a pilot and CP-based baseline, and at least 4% gains compared to a system that uses a neural receiver with pilots but no CP.

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