DocumentCode :
660478
Title :
Spatial Degrees-of-Freedom of 60 GHz Multiple-Antenna Channels
Author :
Haneda, Katsuyuki ; Khatun, A. ; Gustafson, Carl ; Wyne, Shurjeel
Author_Institution :
Sch. of Electr. Eng., SMARAD Centre of Excellence, Aalto Univ., Espoo, Finland
fYear :
2013
fDate :
2-5 June 2013
Firstpage :
1
Lastpage :
5
Abstract :
This paper studies the potential of spatial multiplexing for measured 60 GHz radio channels by estimating the number of eigenchannels. It is well-known that the number of available eigenchannels is dependent on a propagation channel condition as well as antenna array conguration. We evaluate a spatial degrees- of-freedom (SDoF) metric that depends on the propagation conditions and the antenna aperture size, but is otherwise independent of the realization of antenna elements on the aperture. The SDoF metric is a measure of the effective number of antenna elements for spatial multiplexing. We evaluate the SDoF for 60 GHz multiple-input multiple-output channels measured in a conference room environment under a line-of- sight (LOS) condition. Our analysis reveals that the SDoF is more than one for a transmit- receive antenna separation of more than 2 m, which indicates that spatial multiplexing can work in such LOS scenarios. Our results indicate that using only 10 antenna elements at each of the transmit and receive antenna aperture is sufficient for effective spatial multiplexing performance in the considered propagation scenario. Furthermore, by using just 5 antennas at each aperture, eigenchannels down to -15 dB relative magnitude can still be captured.
Keywords :
MIMO communication; eigenvalues and eigenfunctions; millimetre wave antenna arrays; millimetre wave propagation; receiving antennas; space division multiplexing; transmitting antennas; wireless channels; LOS condition; SDoF metric; antenna aperture size; antenna array conguration; antenna element realization; eigenchannels; frequency 60 GHz; line-of-sight condition; multiple-antenna channel; multiple-input multiple-output channels; propagation channel condition; radio channel; relative magnitude; spatial degree-of-freedom metric; spatial multiplexing; transmit-receive antenna aperture; transmit-receive antenna separation; Antenna measurements; Antenna radiation patterns; Aperture antennas; Frequency measurement;
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.2013.6692762
Filename :
6692762
Link To Document :
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