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| Content Provider | IEEE Xplore Digital Library | 
|---|---|
| Author | Ganesan, A. Rajan, B.S. | 
| Copyright Year | 2014 | 
| Description | Author affiliation: Indian Inst. of Sci., Bangalore, India (Ganesan, A.; Rajan, B.S.) | 
| Abstract | Interference alignment is known to achieve the maximum sum DoF of 4M/3 in the 2 × 2 X-Network (i.e., two-transmitter (Tx) two-receiver (Rx) X-Network) with M antennas at each node, as demonstrated by Jafar and Shamai. Recently, an Alamouti code based transmission scheme, which we call the Li-Jafarkhani-Jafar (LJJ) scheme, was proposed for the 2×2 X-Network with two antennas at each node. This scheme achieves a sum degrees of freedom (DoF) of 8/3 and also a diversity gain of two with fixed finite constellation inputs. This work first proposes a new STBC for a three transmit antenna single user MIMO system. Building on this STBC, we extend the LJJ scheme to the 2×2 X-Network with three antennas at each node. As in the LJJ scheme and unlike the Jafar-Shamai scheme, only local channel knowledge is assumed at each Tx. It is shown that the proposed scheme achieves the maximum possible sum DoF of 4. A diversity gain of 3 is also guaranteed when fixed finite constellation inputs are used. | 
| Starting Page | 1216 | 
| Ending Page | 1220 | 
| File Size | 524827 | 
| Page Count | 5 | 
| File Format | |
| ISBN | 9781479951864 | 
| ISSN | 21578117 | 
| DOI | 10.1109/ISIT.2014.6875026 | 
| Language | English | 
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) | 
| Publisher Date | 2014-06-29 | 
| Publisher Place | USA | 
| Access Restriction | Subscribed | 
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) | 
| Subject Keyword | Diversity methods Interference Decoding MIMO Bit error rate | 
| Content Type | Text | 
| Resource Type | Article | 
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