DocumentCode :
539914
Title :
Relative channel reciprocity calibration in MIMO/TDD systems
Author :
Kaltenberger, Florian ; Jiang, Haiyong ; Guillaud, Maxime ; Knopp, Raymond
Author_Institution :
EURECOM Inst., Sophia Antipolis, France
fYear :
2010
fDate :
16-18 June 2010
Firstpage :
1
Lastpage :
10
Abstract :
Channel state information at the transmitter (CSIT) can greatly improve the capacity of a wireless MIMO communication system. In a time division duplex (TDD) system CSIT can be obtained by exploiting the reciprocity of the wireless channel. This however requires calibration of the radio frequency (RF) chains of the receiver and the transmitter, which are in general not reciprocal. In this paper we investigate different methods for relative calibration in the presence of frequency offsets between transmitter and receiver. We show results of theses calibration methods with real two-directional channel measurements, which were performed using the Eure-com MIMO Openair Sounder (EMOS). We demonstrate that in a single-user MIMO channel and for low signal-to-noise (SNR) ratios, the relative calibration method can increase the capacity close to the theoretical limit.
Keywords :
MIMO communication; calibration; time division multiplexing; Eure-com MIMO Openair Sounder; MIMO channel; MIMO/TDD system; channel state information; radio frequency chain calibration; receiver; relative channel reciprocity calibration; signal-to-noise ratio; time division duplex system; transmitter; wireless MIMO communication system; wireless channel reciprocity; Calibration; Channel estimation; Complexity theory; Frequency estimation; MIMO; OFDM;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Future Network and Mobile Summit, 2010
Conference_Location :
Florence
Print_ISBN :
978-1-905824-16-8
Type :
conf
Filename :
5722383
Link To Document :
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