Sum Degrees of Freedom for the K-user Interference Channel Using Antenna Switching
Conference: WSA 2017 - 21th International ITG Workshop on Smart Antennas
03/15/2017 - 03/17/2017 at Berlin, Deutschland
Proceedings: WSA 2017
Pages: 6Language: englishTyp: PDF
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Authors:
Johnny, Milad; Aref, Mohammad Reza (Department of Electrical and Computer Engineering, Sharif University of Technology, Iran)
Abstract:
In this paper, we consider the problem of interference alignment (IA) for the K-user SISO interference channel (IC) with no channel state information (CSI) at transmitters. Contrary to the traditional K-user interference alignment (IA) scheme introduced by Cadambe and Jafar, our achievement has more practical aspects. In the present work, each transmitter uses a specific precoder and every receiver is equipped with one reconfigurable antenna. Each pair of transceivers with the aid of a specific precoder and a switching pattern structure tries to place its desired signal in a subspace which is linearly independent of interference signals. The result of this paper indicates that the optimum sum DoF for the K-user IC with an asymptotically large interference network is √K/2.