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- Title
Interference alignment-and-cancellation scheme based on Alamouti code for the three-user multi-input-multi-output interference channel.
- Authors
Kim, Jaehong; Dong-Sup Jin; Xianglan Jin; Jong-Seon No; Dong-Joon Shin
- Abstract
An interference alignment (IA) scheme for interference channels was recently proposed to achieve the maximum degrees of freedom (DoF). Although most studies of IA focus on network throughput, that is, DoF, reliability in terms of diversity order is also an important performance measure. In this study, interference cancellation (IC) scheme based on Alamouti code in the multi-access scenario is applied to the K-user, multi-input-multi-output (MIMO) interference channel. This IC scheme gives the benefit of diversity order and requires no channel-state-information at the transmitters (CSIT). However, it requires more receive antennas than the IA scheme to achieve the same DoF. In order to reduce the number of receive antennas, especially for the three-user MIMO interference channel, an IA-andcancellation (IAC) scheme based on Alamouti code is proposed. It keeps the same DoF as the IC scheme, but requires partial CSIT. It is analytically shown that the IC and IAC schemes enable symbol-by-symbol decoding and achieve diversity order of two, while the conventional IA scheme achieves diversity order of one.
- Subjects
INTERFERENCE (Telecommunication); MIMO systems; DEGREES of freedom; CODING theory; MULTIPLE access protocols (Computer network protocols)
- Publication
IET Communications (Wiley-Blackwell), 2015, Vol 9, Issue 10, p1278
- ISSN
1751-8628
- Publication type
Article
- DOI
10.1049/iet-com.2014.1084