A sixty GHz intra-car multi-media communications system

Hirokazu Sawada, Tomohide Tomatsu, Gen Ozaki, Hiroyuki Nakase, Shuuzou Kato, Katsuyoshi Sato, Hiroshi Harada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

21 Citations (Scopus)


In order to realize intra-car multimedia communications systems composed of entertainment which requires several hundred Mbps to 1 Gbps capacity and monitoring signal transmission between many parts of the car which requires high reliability and low latency, this paper proposes a millimeter wave system which has high capacity and low latency transmission capability. To clarify the feasibility of millimeter wave systems applications to intra-car multimedia communications, propagation characteristics inside a car have been extensively measured and analyzed. The proposed system sets a car navigator as the center of Intra-car multimedia communications with an Omni antenna and receivers are assumed at front seats, back seats and the luggage space behind the back seats in a typical SUV (Sports Utility Vehicle). The measured results show i. Front seat communications are no worry with simple single carrier (SC) modems without any equalizer, ii. Back seats communications may need beam forming capability for better receive signal power (an Omni antenna system still works with a simple SC modem with a simple rake receiver but without any equalizer. iii. "Luggage space communications may require a directive/beam forming antenna for better receive signal power. The maximum delay spread observed is 6 to 7 ns and no equalizer necessity has been found for Omni antenna receivers inside a car. Further advancement to beam forming antenna will have only 1-2 ns maximum delay spread inside a car. Thus, this paper has proved the feasibility of millimeter wave intra-car multimedia communications system by employing a simple single carrier modem without any equalizers but with simple rake receivers.

Original languageEnglish
Title of host publicationVTC Spring 2009 - IEEE 69th Vehicular Technology Conference
Publication statusPublished - 2009 Oct 12
EventVTC Spring 2009 - IEEE 69th Vehicular Technology Conference - Barcelona, Spain
Duration: 2009 Apr 262009 Apr 29

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252


OtherVTC Spring 2009 - IEEE 69th Vehicular Technology Conference

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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