DocumentCode :
1405003
Title :
On the Design of Interference Alignment Scheme for Two-Cell MIMO Interfering Broadcast Channels
Author :
Shin, Wonjae ; Lee, Namyoon ; Lim, Jong-Bu ; Shin, Changyong ; Jang, Kyunghun
Volume :
10
Issue :
2
fYear :
2011
fDate :
2/1/2011 12:00:00 AM
Firstpage :
437
Lastpage :
442
Abstract :
The interference alignment (IA) is a promising technique to effectively mitigate interferences in wireless communication systems. To show the potential benefits of such an IA scheme, this letter focuses on a two-cell multiple-input multiple-output (MIMO) Gaussian interfering broadcast channels (MIMO-IFBC) with M transmit antennas and N receive antennas. It corresponds to a downlink scenario for cellular networks with two base stations (BSs) with M transmit antennas per BS, and two users with N receive antennas per user, on the cell-boundary of each BS. In this scenario, we propose a novel IA technique jointly designing transmit and receive beamforming vectors in a closed-form expression without iterative computation. It is also analytically shown that the proposed IA algorithm achieves the optimal degrees of freedom (DoF) of 2N in the case of [¾N] ≤ M <; 2N. The simulations demonstrate that not only the analytical results are valid, but the sum-rate of our proposed scheme also outperforms those of conventional techniques, especially in the high signal-to-noise ratio (SNR) regime.
Keywords :
Gaussian channels; MIMO communication; array signal processing; broadcast channels; interference suppression; receiving antennas; transmitting antennas; Gaussian interfering broadcast channels; MIMO-IFBC; base stations; beamforming vectors; cellular networks; interference alignment scheme; interference mitigation; receive antennas; transmit antennas; two-cell MIMO interfering broadcast channels; wireless communication; Degrees of freedom; MIMO interfering broadcast channels; interference alignment; multiple antenna systems;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2011.120810.101097
Filename :
5669236
Link To Document :
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