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Beamforming and interference cancellation schemes for D2D communications

Y. Ni ; S. Jin ; W. Xu ; Michail Matthaiou (Institutionen för signaler och system, Signalbehandling) ; S. Shao ; H. Zhu
2015 IEEE International Conference on Communication Workshop, ICCW 2015 p. 608-613. (2015)
[Konferensbidrag, refereegranskat]

We investigate device-to-device (D2D) communication underlaying cellular networks with M-antenna base stations. We consider both beamforming (BF) and interference cancellation (IC) strategies under quantized channel state information (CSI), as well as, perfect CSI. We derive tight closed-form approximations of the ergodic achievable rate which hold for arbitrary transmit power, location of users and number of antennas. Based on these approximations, we derive insightful asymptotic expressions for three special cases namely high signal-to-noise (SNR), weak interference, and large M. In particular, we show that in the high SNR regime a ceiling effect exists which depends on the received signal-to-interference ratio and the number of antennas. Moreover, the achievable rate scales logarithmically with M. The ergodic achievable rate is shown to scale logarithmically with SNR and the antenna number in the weak interference case. When the BS is equipped with large number of antennas, we find that the ergodic achievable rate under quantized CSI reaches a saturated value, whilst it scales as log2M under perfect CSI.



Denna post skapades 2015-12-04. Senast ändrad 2016-09-29.
CPL Pubid: 227243

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Signalbehandling (1900-2017)

Ämnesområden

Signalbehandling

Chalmers infrastruktur