On Feedback Requirements for CoMP Joint Transmission in the Quasi-Static User Regime

Author

Thiele, Lothar ; Kurras, Martin ; Olbrich, Markus ; Borner, Kai

Author_Institution

Fraunhofer Heinrich Hertz Inst., Berlin, Germany

fYear

2013

fDate

2-5 June 2013

Firstpage

1

Lastpage

5

Abstract

In this work we focus on the downlink direction of cellular multi-user MIMO systems based on OFDM waveforms. Our target system is operated in the frequency division duplex (FDD) mode, while all base stations (BSs) use the same frequency spectrum for downlink transmission. State- of-the-art literature proved that the system performance is mainly limited by the existing co-channel interference. Hence, mitigating these effects would improve the achievable system throughput beyond current benchmarks of cellular systems. Therefore, coordinated multi-point (CoMP) joint transmission (JT) is currently studied in Third Generation Partnership Project (3GPP). However, feedback demands due to massive channel state information (CSI) feedback cause a significant problem. By combining sub-clustering concepts for cooperative BSs with linear channel prediction methods in a thorough time-variant system-level analysis, we show that CSI feedback rates can be scaled down to less than 200 kBit/s per user.

Keywords

3G mobile communication; MIMO communication; cellular radio; cochannel interference; cooperative communication; feedback; frequency division multiplexing; telecommunication channels; 3GPP; CSI feedback rates; CoMP joint transmission; FDD mode; OFDM waveforms; base stations; bit rate 200 kbit/s; cellular multiuser MIMO systems; cellular systems; channel state information; cochannel interference; cooperative base stations; coordinated multipoint; downlink direction; downlink transmission; feedback requirements; frequency division duplex; frequency spectrum; linear channel prediction methods; quasi-static user regime; sub-clustering concepts; third generation partnership project; time-variant system-level analysis; Delays; Downlink; Interference; Joints; MIMO; OFDM; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Spring), 2013 IEEE 77th

Conference_Location

Dresden

ISSN

1550-2252

Type

conf

DOI

10.1109/VTCSpring.2013.6692657

Filename

6692657