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Zero Padding or Cyclic Prefix: Evaluation for Non-Orthogonal Signals

Ozan, W; Grammenos, R; Darwazeh, I; (2020) Zero Padding or Cyclic Prefix: Evaluation for Non-Orthogonal Signals. IEEE Communications Letters , 24 (3) pp. 690-694. 10.1109/lcomm.2019.2963671. Green open access

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Abstract

The debate of using zero padding (ZP) instead of a cyclic prefix (CP) for enhancing channel estimation and equalization performance is a recurring topic. This is particularly true for orthogonal signals, such as orthogonal frequency division multiplexing (OFDM). Yet, there are far fewer studies evaluating the impact of ZP and CP in non-orthogonal systems. Such systems have the added complexity of self-induced interference rendering channel estimation and equalization more challenging. For this reason, this work proposes a new channel estimation and equalization technique for non-orthogonal systems, which combines ZP with an orthogonal demodulator. Results show that the multipath components that appear in the ZP part can be used to enhance performance when compared to the CP approach.

Type: Article
Title: Zero Padding or Cyclic Prefix: Evaluation for Non-Orthogonal Signals
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/lcomm.2019.2963671
Publisher version: https://doi.org/10.1109/LCOMM.2019.2963671
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Zero padding, cyclic prefix, non-orthogonal, FDM, NB-IoT
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10093702
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