Physical-layer transceiving techniques on data-aided orthogonal frequency-division multiplexing towards seamless service on vehicular communications

Frequency error, non-ideal channel estimation (CE) and inefficient seamless road side unit (RSU) service are critical issues occurring in conventional systems that are completely specified by current IEEE 802.11p standards. This study investigates novel techniques for achieving accurate frequency of...

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Bibliographic Details
Published in:IET communications 2013-05, Vol.7 (8), p.721-730
Main Authors: Lin, Chi-Sheng, Lin, Jia-Chin
Format: Article
Language:English
Subjects:
channel estimation
Channels
comprehensive computer simulations
Computer simulation
data‐aided orthogonal frequency‐division multiplexing
DA‐OFDM
Derivation
Design engineering
frequency offset compensation
handover
IEEE 802.11 standards
maximum likelihood estimation
mobile radio
nonideal channel estimation
OFDM modulation
Orthogonal Frequency Division Multiplexing
Performance assessment
physical‐layer transceiving techniques
pseudorandom‐postfix OFDM
radio transceivers
Roads
RSU service
seamless road side unit service
signal‐overlapping areas
TD CE technique
TDS‐OFDM
telecommunication services
time‐domain‐synchronous OFDM
transmission quality
vehicular communications
wireless LAN
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Summary:Frequency error, non-ideal channel estimation (CE) and inefficient seamless road side unit (RSU) service are critical issues occurring in conventional systems that are completely specified by current IEEE 802.11p standards. This study investigates novel techniques for achieving accurate frequency offset compensation and effective CE and RSU selection for handover in signal-overlapping areas. Recently, communications using data-aided orthogonal frequency-division multiplexing (DA-OFDM), such as pseudo-random-postfix OFDM and time-domain-synchronous OFDM (TDS-OFDM), have been actively studied because of their higher effectiveness, efficiency and better transmission quality. This study consists of three parts: (i) derivation of the maximum likelihood estimation for DA-OFDM, (ii) design of an accurate RSU selection scheme and (iii) implementation of a superior TD CE technique. Performance comparisons between the conventional and the proposed techniques are conducted through comprehensive computer simulations.
ISSN:1751-8628
1751-8636
1751-8636
DOI:10.1049/iet-com.2012.0348