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Quantization Effect on 5G Millimeter Wave Communication

The era of millimeter wave (mmWave) spectrum with operating frequency range 30-300 GHz is coming. These frequencies are potentially used by 5G cellular communication since it has some benefits such as larger bandwidth and capacity. Energy efficiency is a crucial issue in 5G mmWave where it employs a large number of antenna array with power consumed ADCs (Analog to Digital Converters). This paper studies the efficiency of energy for mmWave communication through the optimization of ADC bits quantization. We use Channel Structure-based Scheduling (CSS) algorithm for evaluation with the total rate used as a performance parameter. The selection of quantization bit must consider the complexity of implementation. The simulation uses 2 bits quantization to explore the total rate performance. Then increasing bit number into 3 bits and 5 bits in the following simulation. The total rate increases as transmit power increases for the entire implemented quantization bit number. The random scheduling algorithm is used as a reference for comparison. The simulation shows that Channel structure-based scheduling algorithm outperforms random scheduling.