Performance of OFDM/MIMO Scheme for ITS Applications

In this paper, the authors apply a spatial diversity scheme in multi-input multi-output (MIMO) technology to communications between a relay and a vehicle in ITS. Typically, communication performance between a relay and a vehicle with high speed is reduced due to an effect of Doppler shift in comparison with a normal situation (i.e. no movement). Doppler shift is a phenomenon that the center frequency is changed slightly and it causes a reduction in the performance of the whole system. As the velocity of vehicle (a receiver) increases, Doppler frequency is also getting larger. Thus, the system would have trouble in communications in a high speed environment. To overcome this problem, the authors employ a special diversity scheme of MIMO technique. This scheme is to transmit equal data simultaneously at multiple antennas and improves reliability in communication between a relay and vehicle with high velocity. The simulation is carried out in view of two parameters, which are the number of antenna and vehicle velocity. The performance is evaluated in terms of bit error rate (BER). From the simulation results, the authors confirm that Doppler shift affects greatly the communication between vehicles moving fast. BER performance is getting reduced as the velocity of the vehicle increases. In this environment, MIMO improves system performance and its amount of improvement increases as the antennas are large in number.

• Corporate Authors:

  ITS Japan

  Tokyo,   Japan 

  ITS America

  1100 17th Street, NW, 12th Floor
  Washington, DC  United States  20036

  ERTICO

  326 Avenue Louis
  Brussels,   Belgium  B-1050
• Authors:
  • Kim, Yocheol
  • Kim, Eun Cheol
  • Kim, Jin Young
• Conference:
  • 17th ITS World Congress
  • Location: Busan , Korea, South
  • Date: 2010-10-25 to 2010-10-29
• Publication Date: 2010

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 8p
• Monograph Title: 17th ITS World Congress, Busan, 2010: Proceedings

Subject/Index Terms

• TRT Terms: Multipath transmission; Transmission techniques; Vehicle to infrastructure communications; Velocity; Wireless communication systems
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 01363978
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 29 2012 7:21AM