Validation of a green wireless communication system with ICA based semi-blind equalization

In this paper, we validate a green wireless communication system with the independent component analysis (ICA) based and precoding aided semi-blind equalization, on a testbed which consist of a pair of Keithley signal generator and signal analyzer connected to antennas. The implemented system requires only a small amount of side information to be transmitted to the receiver, therefore achieves energy- and spectrum-efficient green communications. The system performance is measured in different wireless channels and compared with simulation results. Compared with training data based channel equalization with overhead of 3.6%, precoding ICA equalization has a better BER performance, which gives a good tradeoff between bandwidth and energy requirement. The impact of precoding weight constant on the BER performance is showed and optimal constant value is found. The impact of frame length on the performance of ICA based equalization is also evaluated.