Design of Infrared Electronic-Toll-Collection Systems with Extended Communication Areas and Performance of Data Transmission

dc.contributor 國立臺灣師範大學電機工程學系 zh_tw Wern-Yarng Shieh en_US Chen-Chien Hsu en_US Shen-Lung Tung en_US Po-Wen Lu en_US Ti-Ho Wang en_US Shyang-Lih Chang en_US 2014-10-30T09:28:30Z 2014-10-30T09:28:30Z 2011-03-01 zh_TW
dc.description.abstract Based on our previous works in the design of an infrared emitter for electronic-toll-collection (ETC) applications, we use the unidirectional cosinen functions to approximate the irregular radiation pattern for typical infrared low-cost commercial light-emitting diodes (LEDs) with a half-intensity angle Φ1/2 = 10°. With the aid of this approximation, the main characteristics of the performance of an infrared ETC system utilizing this type of LED as the emitter can be investigated based on the received signal strength of the system. For on-off keying, a simple model connecting the received signal strength and the bit error rate (BER) of the system is further established. From the calculated or the measured received signal strength of the system, it is not difficult to estimate the system performance in terms of the BER by this simple model. Roughly speaking, for a typical setting of the circuit parameters and a typical uplink and downlink data-transmission protocol, the data transmission can be very successful in terms of a very low BER if the received signal strength is 1.3 times stronger than the signal strength received at the communication boundary. The emitter presented in this paper is able to produce a relatively extended communication area in the vehicle-traveling direction, resulting in longer communication time interval for the data transmission between the onboard unit (OBU) and the roadside unit (RSU) than conventional emitters. Furthermore, the design presented in this paper is validated by experimental measurement to demonstrate its effectiveness. en_US
dc.description.uri zh_TW
dc.identifier ntnulib_tp_E0607_01_020 zh_TW
dc.identifier.issn 1524-9050� zh_TW
dc.language en zh_TW
dc.publisher IEEE Intelligent Transportation Systems Society en_US
dc.relation IEEE Transactions on Intelligent Transportation Systems, 12(1), 25-35. en_US
dc.subject.other Bit error rate (BER) en_US
dc.subject.other dedicated short-range communication (DSRC) en_US
dc.subject.other electronic toll collection (ETC) en_US
dc.subject.other infrared communication en_US
dc.subject.other intelligent transportation system (ITS) en_US
dc.subject.other on–off keying (OOK). en_US
dc.title Design of Infrared Electronic-Toll-Collection Systems with Extended Communication Areas and Performance of Data Transmission en_US