| 1. |
- Arabäck, Niklas, et al.
(författare)
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Serrodyne RF frequency translators for Doppler shift in multipath propagation simulators
- 2013
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Ingår i: 7th European Conference on Antennas and Propagation, EuCAP 2013. ; , s. 985-987
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Konferensbidrag (refereegranskat)abstract
- A frequency translator according to the serrodyne principle, for simulating Doppler shifts within 0-400 Hz, is designed, built, and verified. It is based on commercial analog controlled phase shifters. Serrodyne design aspects as well as control signal hardware and software are described. The design is implemented in a multipath propagation simulator for over-the-air tests of car communication. Measurements on the complete multipath propagation simulator verify the performance of the presented frequency translators.
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| 2. |
- Karlsson, Kristian, et al.
(författare)
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Test Level in Reverberation Chamber EMC Immunity Assessment Based on the Quantile to Average Ratio
- 2022
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Ingår i: IEEE International Symposium on Electromagnetic Compatibility. Volume 2022-September, 2022, Pages 178-182. - : Institute of Electrical and Electronics Engineers Inc.. - 9781665407878 ; , s. 178-182
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Konferensbidrag (refereegranskat)abstract
- As more and more advanced electronics are incorporated into devices and vehicles, there is a need to improve and refine the test methods for performance assessment of electromagnetic compatibility. Traditional standards in reverberation chamber electromagnetic compatibility immunity assessment define the test level according to a calibration based on an average of maximum received electrical field probe readings. In this paper, we propose a converging approach based on the average, in combination with an additional offset to generate a quantile defined test level.
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| 3. |
- Nilsson, Mikael, et al.
(författare)
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Measurement Uncertainty, Channel Simulation, and Disturbance Characterization of an Over-the-Air Multiprobe Setup for Cars at 5.9 GHz
- 2015
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Ingår i: IEEE Transactions on Industrial Electronics. - : Institute of Electrical and Electronics Engineers Inc.. - 0278-0046 .- 1557-9948. ; 62:12, s. 7859-7869
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Tidskriftsartikel (refereegranskat)abstract
- Over-the-air (OTA) multiprobe setups provide an efficient way to characterize the performance of today's advanced wireless communication systems. In this paper, the measurement uncertainty of such a setup using a car as a test object is characterized through three experiments: measurement system analysis, channel sounder measurements, and probe coupling measurements. Four issues were in focus for the analysis: precision, realization of the wireless communication channel, coupling between the probes, and the influence of the test object size. The analysis shows that a large test object such as a car in an OTA multiprobe ring will affect the measurement uncertainty, but only to a small degree. The measurement uncertainty expressed as expanded uncertainty was below +/-1 dB, which is a level that would not violate best practice total uncertainty levels for comparable OTA methods.
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| 4. |
- Nilsson, Mikael, et al.
(författare)
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Multipath propagation simulator for V2X Communication Tests on Cars
- 2013
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Ingår i: 2013 7th European Conference on Antennas and Propagation, EuCAP 2013. - 9788890701832 ; , s. 1342-1346, s. 1342-1346
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Konferensbidrag (refereegranskat)abstract
- Test and evaluation of wireless communication performance with cars can be done in many ways. One approach, for both vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) tests, is to use a multipath propagation simulator to achieve realistic signal environments for the different communication systems under test. Multipath propagation simulators have previously been shown to be useful for testing mobile handsets. Specific issues related to tests with cars are the large size of the test object and the disturbances it can cause. In this paper we experimentally study how different design parameters of the multipath propagation simulator affect the received signals. The analysis of the setup as well as the data is performed using the so-called 'Design of Experiments' method.
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