Degrees of freedom of M × N SISO X channel with synergistic alternating CSIT
| Autor: | Young-Sik Moon, Jong-Seon No |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Computer Networks and Communications
Computer science Transmitter Degrees of freedom (statistics) 020206 networking & telecommunications 02 engineering and technology Topology Computer Science::Robotics Channel state information 0202 electrical engineering electronic engineering information engineering Interference alignment Computer Science::Information Theory Information Systems Communication channel |
| Zdroj: | Journal of Communications and Networks. 21:521-528 |
| ISSN: | 1976-5541 1229-2370 |
| Popis: | In this paper, we investigate degrees of freedom (DoF) of the M × N single input single output (SISO) X channel with alternating channel state information at the transmitter (CSIT). It is known that sum DoF of 2-user SISO X channel with synergistic alternating CSIT is the same as the sum DoF of 2-user (M = N = 2) SISO X channel with perfect CSIT [8]. As an extension of the 2-user case, achievable schemes of the M × N SISO X channel with synergistic alternating CSIT are proposed. It is shown that the proposed M × N X channel schemes with synergistic alternating CSIT achieve the sum DoF 2M/(M + 1), which is better than the weighted sum DoF of the conventional schemes for M ≤ N. The DoF of the proposed scheme with M = N = K is strictly better than the best known DoF for the K-user X channel with delayed CSIT. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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