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Proposal of a Null Subcarrier Allocation Method for CAZAC-OFDM Systems

Authors:
Taketo Nasuno
Masahiro Muraguchi

Keywords: OFDM; CAZAC; null subcarrier; PAPR

Abstract:
A major drawback of Orthogonal Frequency Division Multiplexing (OFDM) signals is extremely high Peak-to-Average Power Ratio (PAPR). Constant Amplitude Zero Auto Correlation (CAZAC) precoding can dramatically improve the PAPR of OFDM signals, i.e., up to the same PAPR value of single carrier signals with the same modulation scheme. One negative point of the CAZAC precoding technic is not able to meet the current wireless standards, which usually require a null subcarrier allocated on the center of data subcarriers. In this paper, we demonstrate the CAZAC-OFDM which completely satisfys the 4G-LTE standard by using the proposed allocation method for a null subcarrier without degrading the PAPR and the Bit-Error-Rate.

Pages: 1 to 6

Copyright: Copyright (c) IARIA, 2019

Publication date: June 30, 2019

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-719-1

Location: Rome, Italy

Dates: from June 30, 2019 to July 4, 2019