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Wireless Personal Communications
Erschienen in: Wireless Personal Communications 3/2015

01.02.2015

Two Branch Beamforming for the Three User Constant MIMO Interference Channel

verfasst von: Duckdong Hwang, Tae-Jin Lee

Erschienen in: Wireless Personal Communications | Ausgabe 3/2015

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Abstract

We consider the interference alignment (IA) in the three user constant multiple input multiple output (MIMO) interference channel. A two branch transmit and receive beam-forming scheme is proposed, where the IA scheme of Cadambe and Jafar is applied to the top branches while the bottom branches help additional stream transmission without causing interference to the other users. This scheme is applicable without any restriction on the numbers of transmit and receive antennas and affords additional degree of freedom gain compared to the Cadambe and Jafar scheme. With the proposed scheme, the known degree of freedom upper bound \(\frac{3(M+N)}{4}\) of the beam-forming based IA is achieved in more general condition than the previous result for the three user constant MIMO interference channel, where \(M\) is the number of antennas at the transmitter and \(N\) is the number of antennas at the receivers.
Vorheriger Artikel Reduced-Dimensional PARAFAC-Based Algorithm for Joint Angle and Doppler Frequency Estimation in Monostatic MIMO Radar
Nächster Artikel A Hybrid MAC Scheme to Improve the Transmission Performance in Body Sensor Networks

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Fußnoten
1
When \(M=N\) and they are odd numbers, the IA scheme in [2] uses pre-coding over two symbol durations to get two equal dimensional spaces, one for the signal reception and the other for the interference reception. However, this is different from symbol extension since they are not relying on time or frequency selectivity. In this correspondence , we also assume pre-coding over two symbol durations when we apply the IA in [2] to an odd numbered dimension.
 
2
\(J\ (0\le J\le \min (M,N))\) is an integer to be optimized in Sect. 3.
 
Literatur
1.
Bresler, G., Cartwright, D., & Tse, D. (2011). Settling the feasibility of interference alignment for the MIMO interference channel: The symmetric square case. arXiv:​11040888.
2.
Cadambe, V. R., & Jafar, S. A. (2008). Interference alignment and degrees of freedom of the k-user interfernce channel. IEEE Transactions on Information Theory, 54(8), 3425–3441.CrossRefMathSciNet
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Choi, S. W., Jafar, S. A., & Chung, S. Y. (2009). On the beamforming design for efficient interference alignment. IEEE Communications Letters, 13(11), 847–849.CrossRef
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Metadaten
Titel
Two Branch Beamforming for the Three User Constant MIMO Interference Channel
verfasst von
Duckdong Hwang
Tae-Jin Lee
Publikationsdatum
01.02.2015
Verlag
Springer US
Erschienen in
Wireless Personal Communications / Ausgabe 3/2015
Print ISSN: 0929-6212
Elektronische ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-014-2085-4

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