Open AccessPhysical‐layer transceiving techniques on data‐aided orthogonal frequency‐division multiplexing towards seamless service on vehicular communications
Author(s) -
Lin ChiSheng,
Lin JiaChin
Publication year - 2013
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2012.0348
Subject(s) - orthogonal frequency division multiplexing , computer science , carrier frequency offset , physical layer , multiplexing , electronic engineering , transmission (telecommunications) , frequency offset , quality of service , frequency domain , frequency division multiplexing , computer network , real time computing , wireless , channel (broadcasting) , telecommunications , engineering , computer vision
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.