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Modeling and measurement of MIMO relay channels

: Lei, J.; Thiele, L.; Jungnickel, V.


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Vehicular Technology Society -VTS-:
IEEE 67th Vehicular Technology Conference, VTC 2008-Spring. Proceedings. Vol.1 : Marina Bay, Singapore, 11 - 14 May 2008
Piscataway, NJ: IEEE, 2008
ISBN: 1-4244-1644-2
ISBN: 978-1-4244-1644-8
ISBN: 978-1-4244-1645-5
Vehicular Technology Conference (VTC Spring) <67, 2008, Singapore>
Conference Paper
Fraunhofer HHI ()
antenna radiation pattern; channel capacity; mimo communication; radiowave propagation

This paper proposes a relay channel model which takes into account the influence of relay location and antenna configuration. Simulation results show that when relay is in the line-of-sight (LOS) propagation environment, the channel capacity will degrade. To improve the performance of the channel, water-filling (WF) algorithm is used to allocate the power, simulation results shows that the WF-based relay channel outperforms the uniform power allocation channel. The radiation pattern of the relay antenna is also an importance factor which affects the channel capacity in this case. The widely used Rayleigh channel model overestimates the performance of the channel compared with our model when the location of the relay is not in the scenario where Ricean K-factor is zero. Measurements have been done at 2.53 GHz to investigate the above-rooftop and ground-level relay channels. Results indicate that above-rooftop deployment is very efficient to improve the capacity and coverage.