On the Inclusion and Utilization of Pilot Tones in Unique Word OFDM

Christian Hofbauer, Werner Haselmayr, Hans-Peter Bernhard, Mario Huemer

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

Abstract

Unique word-orthogonal frequency division multiplexing (UW-OFDM) is known to provide various performance benefits over conventional OFDM using cyclic prefixes (CP). Most important, UW-OFDM features excellent spectral sidelobe suppression properties and an outstanding bit error ratio performance. Current research has mainly focused on principle performance bounds of UW-OFDM, with less attention on challenges aside from idealized communication scenarios, such as system parameter estimation tasks. In this work we present an approach for including frequency pilot tones into the UW-OFDM signaling scheme, which can then be utilized for these estimation tasks. Suitable optimization criteria are presented and interactions of pilots with data symbols are highlighted. Pilot tone based estimation of a carrier frequency offset (CFO) is conducted as an estimation example, revealing considerable differences to conventional OFDM. Simulation results in a multipath environment demonstrate a significantly increased estimation accuracy in UW-OFDM over CP-OFDM, which becomes even more dominant with an increasing CFO. This performance difference is due to the inherent redundancy present in an UW-OFDM signal.
OriginalspracheEnglisch
Aufsatznummer9204637
Seiten (von - bis)5504-5518
Seitenumfang15
FachzeitschriftIEEE Transactions on Signal Processing
Jahrgang68
DOIs
PublikationsstatusVeröffentlicht - 1 Jän. 2020

Fingerprint

Untersuchen Sie die Forschungsthemen von „On the Inclusion and Utilization of Pilot Tones in Unique Word OFDM“. Zusammen bilden sie einen einzigartigen Fingerprint.

Dieses zitieren