NDLI: A Roadside Downlink Wireless Transmission Scheme Using OFDM and Virtual MIMO

Content Provider	IEEE Xplore Digital Library
Author	Yu Qian Bin Fan Kan Zheng Wenbo Wang
Copyright Year	2006
Description	Author affiliation: Wireless Signal Process. & Nework Lab., Beijing Univ. of Posts & Telecommun. (Yu Qian; Bin Fan; Kan Zheng; Wenbo Wang)
Abstract	In this paper, a downlink wireless transmission scheme is proposed for roadside deployment. The scheme is based on orthogonal frequency-division multiplexing (OFDM) technology, and it also employs virtual multiple input multiple output (MIMO) to further improve system capacity. In the "virtual" MIMO scheme proposed in this paper, signals can be sent from two base stations (BS) to one user, which creates a virtual MIMO system that may offer additional capacity gains in fading channels. This scheme is especially fit for the bi-sectional BSs with zonal coverage along roadside. Simulation results show that the proposed scheme can support both high and low speed users on road, and achieve a high system capacity gain especially in the cell edge. Within this scheme, the OFDM symbols are characterized into two groups: localized resource group (LRG), which is continuous in time-frequency (TF) domain; and distributed resource group (DRG) which is TF discrete. As LRG is fit for low-speed users to utilize the slowly varying channel while DRG is fit for high-speed users with rapid varying channels, the combination of them makes the allocation of OFDM subchannel more elastic to support users with different speed
Starting Page	586
Ending Page	589
File Size	5652507
Page Count	4
File Format	PDF
ISBN	0780395867
DOI	10.1109/ITST.2006.288972
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-06-21
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless communication Base stations OFDM Roads Transmitting antennas Receiving antennas roadside wireless transmission Downlink Frequency conversion MIMO Frequency division multiplexing virtual MIMO
Content Type	Text
Resource Type	Article

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