Can the Use of Reconfigurable Antennas Overcome the CSI Bottleneck for FDD Massive MIMO?
| Autor: | Ana Garcia Armada, Luc Vandendorpe, Maximo Morales Cespedes, Marc Moonen, Jorge Plata-Chaves |
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| Rok vydání: | 2017 |
| Předmět: |
060102 archaeology
Computer science ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Real-time computing Transmitter MIMO Duplex (telecommunications) 020206 networking & telecommunications Data_CODINGANDINFORMATIONTHEORY 06 humanities and the arts 02 engineering and technology Spectral efficiency Precoding Bottleneck Channel state information 0202 electrical engineering electronic engineering information engineering Cellular network Electronic engineering 0601 history and archaeology Interference alignment Computer Science::Information Theory |
| Zdroj: | WCNC |
| Popis: | Massive MIMO has been proposed as a means of achieving huge spectral efficiency in cellular networks. However, its implementation is usually based on linear precoding schemes using Channel State Information (CSI). For this reason, the use of the Time Division Duplex (TDD) mode is typically assumed since it removes the dependence on the number of antennas at the transmitter to acquire CSI. Unfortunately, most of the cellular network operate in the Frequency Division Duplex (FDD) mode in which the acquisition of CSI depends proportionally to the number of transmit antennas. For this reason, the implementation of Massive MIMO is handicapped to few transmit antennas for the current cellular networks. In this paper we study the use of reconfigurable antennas that can switch among a set of preset modes, i.e., radiation patterns, through Blind Interference Alignment schemes. We show that it is a solution to exploit a very large number of antennas at the transmit side, overcoming the bottleneck that today constitutes the acquisition of CSI in Massive MIMO systems operating in FDD mode. |
| Databáze: | OpenAIRE |
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