In this paper, we investigate an interference mitigation scheme by antenna selection in device-to-
device (D2D) communication underlaying downlink cellular networks. We first present the closed-form
expression of the system achievable rate and its asymptotic behaviors at high signal-to-noise ratio (SNR)
and the large antenna number scenarios. It is shown that the high SNR approximation increases with
more antennas and higher ratio between the transmit SNR at the BS and the D2D transmitter. In addition,
a tight approximation is derived for the rate and we reveal two thresholds for both the distance of the
D2D link and the transmit SNR at the BS above which the underlaid D2D communication will degrade
the system rate. We then particularize on the small cell setting where all users are closely located. In
the small cell scenario, we show that the relationship between the distance of the D2D transmitting link
and that of the D2D interfering link to the cellular user determines whether the D2D communication
can enhance the system achievable rate. Numerical results are provided to verify these results
