Radio Channel Measurements

The ROADART T2X channel modeling task was based on wideband multidimensional channel measurements at 5.9 GHz ITS frequency band. Three channel measurement campaigns were undertaken; two in Germany and one in Greece.

Measurement campaigne, Peloponnese Greece, 10/2017

The third measurement campaign took place in Panagopoula tunnel, a 3.179 meters long tunnel located in Peloponnese-Greece. The setup of the measurement equipment was designed in a way that one can measure a more generic channel that is free of shadowing in T2I links. The channel sounder used could measure a 2x4 MIMO channel with a signal bandwidth of 25 MHz. The excitation signal was an OFDM-like transmitting signal with the subcarriers uniformly distributed in the measurement bandwidth and it was generated using Frank-Zadoff-Chu sequences. The signal was cyclically extended. The technique that was used for the MIMO measurement procedure is a popular fast switching method with a time division basic principle scheme that alternates between the transmitting antennas for each one of the receiving antennas.

Contact Person
Dr. Konstantinos Maliatsos, This email address is being protected from spambots. You need JavaScript enabled to view it.
Prof. Athanasios G. Kanatas, This email address is being protected from spambots. You need JavaScript enabled to view it.

Measurement campaigne, Duesseldorf, 04/2017

The second measurement campaign took place in Kamp-Lintfort, in North Rhine-Westphalia. The measurement equipment setup was designed in order to measure a more generic channel that is free of shadowing in T2T and T2I links. Therefore, to avoid the signal blocking by the vehicle structures, the antennas were placed well-above the roof of two vehicles, at a height similar to the one used in the first measurement campaign, using car roof racks and machined custom made equipment. The channel sounder used could measure a 2x4 MIMO channel with a signal bandwidth of 500 MHz. Due to the unavailability of two baseband generators, a different set of excitation waveforms were used. The measurement routes that were followed included mainly a highway with varying traffic density along its route, two fairly long tunnels and some areas with smaller roads.

Contact Person
Dr. Konstantinos Maliatsos, This email address is being protected from spambots. You need JavaScript enabled to view it.
Prof. Athanasios G. Kanatas, This email address is being protected from spambots. You need JavaScript enabled to view it.

Measurement campaigne, Munich, 10/2016

The first campaign took place in the outskirts of Munich, in the district of Dachau, Bavaria.The measurement setup and the placement of the antenna array on the trucks considered the impact of the truck container and the corresponding shadowing of the signal. The channel sounder used could measure a 2x8 MIMO channel with a signal bandwidth of 500 MHz. The excitation signal is an OFDM-like transmitting signal with the subcarriers uniformly distributed in the measurement bandwidth and it is generated using Frank-Zadoff-Chu sequences. The signal is cyclically extended. The technique that was used for the MIMO measurement procedure is a popular fast switching method with a time division basic principle scheme that alternates between the transmitting antennas for each one of the tetrad of the receiving antennas. After the reception of ten frames from the first tetrad, RF switch was taking place, and another ten frames were received from the second tetrad. The overall sequence contains 7000 samples with a sampling frequency of 7 GSamples/sec. The routes followed included mainly a highway with varying traffic density along its path, a fairly long tunnel, and some areas with smaller roads that were used for manoeuvring the trucks in order to get back to the highway.

Contact Person
Dr. Konstantinos Maliatsos, This email address is being protected from spambots. You need JavaScript enabled to view it.
Prof. Athanasios G. Kanatas, This email address is being protected from spambots. You need JavaScript enabled to view it.