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    SDR implementation of an adaptive low-latency IEEE 802.11p transmitter system for real-time wireless applications
    (2017-03-23)
    Kloc, Matej
    ;
    Weigel, Robert
    ;
    Kölpin, Alexander
    In this paper a software-defined radio (SDR) implementation of a wireless transmitting (Tx) system is proposed. It is intended for real-time wireless transfer of time-critical control, diagnostics, and calibration data between a hardware-in-the-loop (HIL) test system and an automotive electronic control unit enabling novel HIL testing methods. The introduced SDR Tx system applies the wideband physical layer IEEE 802.11p and is designed for low Tx latency. Besides, it provides adaptivity in terms of a listen-before-talk mechanism that is mandatory required by the revised European spectrum regulations in the 2.4GHz industrial, scientific, and medical frequency band. Using hardware measurements concerning Tx latency and performance it is shown that the SDR Tx system offers an appropriate solution to evaluate the introduced real-time wireless application.
    Publicationtype: Conference Paper
      85
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    Enhancing the real-time performance of a wireless hardware-in-the-loop test system in ISM bands
    (2017-01-17)
    Kloc, Matej
    ;
    Weigel, Robert
    ;
    Kölpin, Alexander
    This paper presents a spectrum agile real-time wireless communication gateway (RT-WCGW) concept that is intended to replace the common wired communication interfaces between a hardware-in-the-loop (HIL) test system and an automotive electronic control unit (ECU). It makes the bidirectional transfer of time-critical control, diagnostics, and calibration (CoDiCa) data wireless and hence increases the HIL test setup flexibility as well as opens up novel opportunities for testing automotive ECUs or autonomous driving systems. The introduced approach applies the robust physical layer IEEE 802.11p and exploits multiple parallel radio front ends. This configuration enables a multi-channel operation and enhances the deterministic dynamic spectrum access in the coexistence-afflicted 2.4GHz industrial, scientific, and medical (ISM) frequency band required for real-time wireless CoDiCa data transmission. In addition, an adaptive spectrum access procedure is introduced that provides compliance with the revised European spectrum regulations in terms of the mandatory listen-before-talk mechanism. By employing interference measurements and link-level simulations the real-time performance of the RT-WCGW is characterized and evaluated under realistic coexistence conditions. The results show that the real-time capability of the RT-WCGW can be significantly improved by utilizing the multi-channel approach making it practicable for novel HIL test applications.
    Publicationtype: Conference Paper
      72
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    Making real-Time hardware-in-The-loop testing of automotive electronic control units wireless
    (2016-12-01)
    Kloc, Matej
    ;
    Weigel, Robert
    ;
    Kölpin, Alexander
    Hardware-in-The-loop (HIL) simulation is an industry standard for testing automotive electronic control units (ECUs). In this paper, we present a concept that replaces the common wired cabling between a HIL test system and an automotive ECU and thus makes the real-Time transmission of time-critical control, diagnostics, and calibration (CoDiCa) data wireless. This increases the flexibility of the HIL test setup and opens up new possibilities for testing automotive ECUs or autonomous driving systems. The proposed wireless communication gateway system adopts the robust physical layer IEEE 802.11p and is designed for operation in the 2.4 GHz industrial, scientific, and medical frequency (ISM) frequency band. To achieve compliance with the European regulations on spectrum access in this unlicensed band and to enable the bidirectional deterministic transfer of CoDiCa data, a new adaptive spectrum access procedure and timeslotted communication scheme is introduced. Based on extensive link-level simulations it is demonstrated that the introduced approach is able to meet the required real-Time performance and hence is suitable to be applied for novel HIL test applications.
    Publicationtype: Conference Paper
      102