What is the Value of Limited Feedback for Next Generation of Cellular Systems?

Autor: Athirah Mohd Ramly, Mohammad Hasbullah Mazlan, Mahamod Ismail, Mehran Behjati, Rosdiadee Nordin
Rok vydání: 2019
Předmět:
Zdroj: Wireless Personal Communications. 110:1127-1142
ISSN: 1572-834X
0929-6212
DOI: 10.1007/s11277-019-06777-1
Popis: The demand for higher data traffic is exponentially growing. Since last 2 years or so, new research movements have emerged towards LTE-B (Release 13 and beyond) and 5th generation (5G) networks. As the next generation of cellular networks are going to be an integration of different radio access technologies and denser in term of space and frequency, the problem of interference management becomes more vital and challenging for academic and industrial units. One of the main technical challenges of interference management in the frequency division duplex system is the issue of channel state information (CSI) feedback overhead. Accordingly, this article briefly overviews the key candidate technologies for LTE-B and 5G and as well as to addresses their features and problems from the interference management perspective. Then, the problem of limited feedback in the multi-user MIMO systems is formulated and discussed. Afterward, the performance of distributed antenna systems is investigated under imperfect CSI and different phases of limited feedback technique. It is shown that accuracy of CSI feedback plays a vital role towards the realization of next generation of cellular systems. Finally, the future research directions are addressed in this domain.
Databáze: OpenAIRE
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