AG Kommunikationstheorie


Measurement-based modeling and validation of real-world wireless fading channels in urban scenarios


The growing demands on mobile services and high-speed data traffic has been increasing the complexity of the user equipment (UE), and so the complexity of the testing procedures used by the manufactures to test the performance of their products. The testing procedures can be categorized into compliance testing and field testing. The compliance testing is needed to check if the UE meets the design and manufacturing specifications. The field testing is conducted to test the UE performance in a real environment. It involves performing a drive test in geographical locations such as an Urban areas and capturing the channel measurements in real-time. The equipment used during the drive test includes a UE, a network analyzer and software to record the measurement data. The field testing can be expensive and time-consuming, hence it is essential for the manufacturers to develop solutions which increase the efficiency of the field testing in terms of both cost and time. One solution is to simulate the real-world propagation channel in the lab using a radio frequency (RF) channel emulator. This thesis aims to simulate a multi-path propagation channel based on real-world measurements obtained from the drive test. This involves processing the real-world measurements to extract the propagation channel characteristics such as path-loss, Doppler shift and delay shift and generate the simulated RF channel. Additionally, a validation procedure is required to test accuracy of the simulation results against both real-world measurements and simulation results generated by the ray-launching algorithm PIROPA.

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