Abstract
This paper considers a multipair amplify-and-forward massive MIMO relaying system with low-resolution ADCs at both the relay and destinations. The channel state information (CSI) at the relay is obtained via pilot training, which is then utilized to perform simple maximum-ratio combining/maximum-ratio transmission processing by the relay. Also, it is assumed that the destinations use statistical CSI to decode the transmitted signals. A closed-form approximation of the achievable sum rate is presented, which enables the efficient evaluation of the impact of key system parameters on the system performance. It is found that increasing the number of relay antennas is an effective method to compensate for the rate loss caused by coarse quantization. Moreover, it is desirable to deploy the low-resolution ADCs at the relay and high-resolution ADCs at the destination.
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