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D3.6 5G Evaluation Report of the Developed Demo System

    Report Published on 16 Jul 2019
Paper produced by By Yuan Zhuang and Dr. Xu (Judy) Zhu on 15 March 2019 as part of the Liverpool 5G Testbed. This project is part-funded by the Department for Digital, Culture, Media and Sport.

Extract - Summary of Deliverable

This stage of the project is to evaluate the developed demonstrate system. The proposed algorithms are supposed to enhance the spectrum usage efficiency and reduce peak to average power ration of the modulated signal used in 5G communication system (for 60 GHz in this project). Moreover, the high reliability of the proposed algorithms will also benefit the Blu Wireless communication system by
attenuate the high path loss caused by the frequency selective fading of the milli meter wave.

Extract - Summary of Results

The semi-blind precoding aided ICA based equalisation approach is verified by applying the real-time test-bed composed of the Keithley signal generator and signal receiver. The reference data sequences for precoding are also designed, which is as same process as it in the simulation. The optimal precoding constant a is tested in office room, and the best performance value range is between [0.3; 0.4]. A frame size with no less than 128 OFDM blocks can provide a good steady-state system performance. The reason why Doppler spread in the Reverberation chamber is stronger than that in room environment under the same fan speed and situation is that room is an open area so that some wireless wave will scatter and never be reflected to the receiver. Also, the power will be missed on some frequency. The pilot aided ICA based channel equalisation method cannot efficiently compensate the ICI effect caused by Doppler spread due to rotational fan even with large number of pilots ahead prefixed onto the transmitted signal sequences. The BER performance within the measurement shows that this method can obtain a quite well result.

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