Interference cancellation for the coexistence of 5.8 GHz DSRC and 5.9 GHz ETSI ITS

Maddio, Stefano; Cidronali, Alessandro; Passafiume, Marco; Collodi, Giovanni; Manes, G.

doi:10.1109/icmim.2015.7117960

Cited by 4 publications

(1 citation statement)

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“…These are based on passive transponder technologies [9,10] and are spread across many countries in large volumes. Although there exists a regulation about out-of-band spectral emissions, the coexistence of ITS and C-V2X applications, on the one hand, and pre-existing dedicated short range communications (DSRCs) in the 5.8 GHz frequency band on the other, is of concern for the effective deployment of new vehicular communication paradigms [11,12]. For this purpose, the European Telecommunications Standards Institute (ETSI) issued a technical specification [13] where it discussed that, because of the small frequency separation in the frequency band from 5795 to 5815 MHz in use for the EU-DSRC, and the frequency band from 5855 to 5925 MHz in use for the ITS, and considering that both systems operate in road traffic environments, there is significant potential for interference effects between the two communication technologies.…”

Section: Introductionmentioning

confidence: 99%

A New Varactor-Tuned 5.8 GHz Dielectric Resonator Band-Stop Filter for ITS and C-V2X Coexistence with Vehicular DSRC

2023

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In this paper, we introduce an electronically tuneable band-stop filter based on a dielectric resonator, along with its design principles and equivalent circuit model aimed at the coexistence of intelligent transport systems (ITS) and cellular vehicle-to-everything (C-V2X) communications operating at 5.9 GHz, with the widely spread vehicular dedicated short range communications (DSRC) at 5.8 GHz. The proposed architecture involves a dielectric resonator coupled via a microstrip transmission line to a planar ring resonator. The resonance is electronically tuned by varying the bias voltage of a varactor diode placed in the ring. This design is analyzed theoretically and experimentally. For validation, a filter operating at 5.8 GHz was designed. The prototype is capable of enhancing coexistence exhibiting to features. First, when inserted into the ITS transmitter chain, it reduces unwanted transmitter emissions in the out-of-band spectrum occupied by the DSRC carriers in the 5.8 GHz frequency band of at least 25 dB, with a minimal insertion loss at 5. 9 GHz of 1.6 dB; secondly, when inserted in the ITS receiver chain, it exhibits high linearity that prevents the generation of intermodulation products falling into the filter pass band. The prototype features more than 21 dBm of third-order input intercept points, and a tuning range of 26 MHz while maintaining a minimal loaded Q factor of 93. The prototype is discussed regarding the detailed equivalent circuit parameter extraction and their dependency upon the control voltage.

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