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A New Technique of Symbol Synchronization for OFDM Systems with CAZAC Precoding

Authors:
Ryoju Tachikawa
Masahiro Muraguchi

Keywords: OFDM; Zadoff-Chu sequence; CAZAC precorder; symbol synchronization;

Abstract:
As Orthogonal Frequency Division Multiplex (OFDM) signal is essentially a sum of multiple subcarrier signals aligned in frequency domain, its probability density function in time domain resembles Gaussian distribution like of thermal noise, and thus the amplitude of time-domain waveform has high Peak-to-Average Power Ratio (PAPR). Constant Amplitude Zero Auto-Correlation (CAZAC) waveform precoding transforms from an OFDM waveform into a waveform kind of single-carrier modulation signal. In this paper, a new technique of symbol synchronization for OFDM systems with CAZAC precoding is proposed. By the CAZAC precoding, the waveform of one OFDM symbol can be changed to the waveform of Zadoff-Chu sequence by inputting proper data sequence. Here, the Zadoff-Chu sequence, known as one of CAZAC sequence, has excellent autocorrelation characteristics and is utilized as a strong tool for symbol synchronization in 4G-LTE systems.

Pages: 7 to 12

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