DocumentCode :
1787677
Title :
Massive MIMO for interference management in heterogeneous networks
Author :
Dommel, Johannes ; Knust, Paul-Philipp ; Thiele, Lothar ; Haustein, Thomas
Author_Institution :
Heinrich Hertz Inst., Fraunhofer Inst. for Telecommun., Berlin, Germany
fYear :
2014
fDate :
22-25 June 2014
Firstpage :
289
Lastpage :
292
Abstract :
In this paper, a spatial interference coordination scheme for a typical macro/small-cell overlay scenarios is proposed which protects small-cell user equipments (UEs) from macro-cell interference and has potential applications in massive multiple-input multiple-output (MIMO) deployments. We assume the macro base stations (BSs) to be equipped with a large number of transmit antennas which are employed to reduce interference towards small-cell users by means of spatial transmit processing. Uncoordinated spatial multiplexing (SMUX) per access point (AP) is considered as a baseline, i.e. the macro BS uses zero-forcing (ZF)-based block diagonalization (BD) [1] to serve their user without taking interference towards small-cell UEs into account. The proposed method considers a joint BD/interference-alignment (IA) - approach to calculate the macro pre-coder and reduces the dimension of the interference sub-space for small-cell UEs without destroying the orthogonality of the macro BD. It results, that the the interference can be reduced even if the number of protected small-cell UEs exceeds the number of free spatial dimensions at the macro BS.
Keywords :
MIMO communication; cellular radio; precoding; radiofrequency interference; space division multiplexing; transmitting antennas; SMUX; heterogeneous networks; interference management; interference-alignment; macro base stations; macro cell overlay scenario; macro precoder calculation; macrocell interference reduction; massive MIMO deployments; small-cell overlay scenario; small-cell user equipment protection; spatial interference coordination scheme; spatial transmit processing; transmit antennas; uncoordinated spatial multiplexing-per- access point; zero-forcing-based block diagonalization; Conferences; Interference; MIMO; Multiplexing; Signal processing; Transmitting antennas; Vectors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Sensor Array and Multichannel Signal Processing Workshop (SAM), 2014 IEEE 8th
Conference_Location :
A Coruna
Type :
conf
DOI :
10.1109/SAM.2014.6882398
Filename :
6882398
Link To Document :
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