DoF Region of the Decentralized MIMO Broadcast Channel—How many informed antennas do we need?
| Autor: | Arash Gholami Davoodi, Syed A. Jafar, Antonio Bazco-Nogueras, Nicolas Gresset, Paul de Kerret, David Gesbert |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Set (abstract data type)
Computer science Channel state information MIMO 0202 electrical engineering electronic engineering information engineering 020206 networking & telecommunications 02 engineering and technology Antenna (radio) Topology Mimo broadcast channel Computer Science::Information Theory |
| Zdroj: | ISIT |
| Popis: | In this work, we study the impact of imperfect sharing of the Channel State Information (CSI) available at the transmitters on a Network MIMO setting in which a set of M transmit antennas, possibly not co-located, jointly serve two multi-antenna users endowed with N 1 and N 2 antennas, respectively. We consider the case where only a subset of k transmit antennas have access to perfect CSI, whereas the other M − k transmit antennas have only access to finite precision CSI. The analysis of this configuration aims to answer the question of how much an extra informed antenna can help. We model this scenario as a Decentralized MIMO Broadcast Channel (BC) and characterize the Degrees-of-Freedom (DoF) region, showing that only k = max(N 1 , N 2 ) antennas with perfect CSI are needed to achieve the DoF of the conventional BC with ubiquitous perfect CSI. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|