NDLI: Analyses and Suppression Method of Frequency Offset and Timing Offset in FH-OFDM System

Content Provider	IEEE Xplore Digital Library
Author	Xiupei Zhang Heung-Gyoon Ryu Byung Gak Jo Gwang Hoon Baek
Copyright Year	2009
Abstract	Recently, FH-OFDM (frequency hopping orthogonal frequency division multiplexing) system has been widely used in communication system. However, FH-OFDM system is sensitive to frequency offset and timing offset, which are inherently unavoidable in wireless mobile communication systems and can seriously degraded system performance. So, research on estimation and compensation of these offsets is of great importance. In this paper, a novel joint method for estimating carrier frequency offset and timing offset is proposed. This algorithm exploits pilots to estimate the offsets, and compared with other methods, the processing can be completed in one symbol time period. Thus, this method can be used in both static and ergodic channel. The estimation can be divided into frequency offset estimation and timing offset estimation. Also, both frequency offset and timing offset estimation are divided into two steps: coarse frequency offset estimation step, fine frequency offset estimation step, fraction timing offset estimation step and integer timing offset estimation step. Through the computer simulations, the suggested algorithm shows very good performance results both in AWGN and multipath environments.
Starting Page	123
Ending Page	127
File Size	873825
Page Count	5
File Format	PDF
ISBN	9780769536941
DOI	10.1109/SPACOMM.2009.9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-20
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	OFDM Frequency conversion Mobile communication Frequency estimation Wireless communication Degradation Wireless sensor networks timing offset System performance Spread spectrum communication compensation Timing FH-OFDM carrier frequency offset joint estimation
Content Type	Text
Resource Type	Article

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