A MIMO Radio Channel Model for Low-Altitude Air-to-Ground Communication Systems

Air-to-Ground (A-G) communication networks play an important role providing wireless access to areas that lack cellular or satellite infrastructure. The use of Multiple-Input Multiple-Output (MIMO) technology has been considered to increase the data rate and range of these systems, and over-the-air experiments have shown promising results, however, they lack a detailed characterization of the A-G channel. In this paper an extension to the Geometric Air-to- Ground Ellipsoidal (GAGE) radio channel model is proposed to predict the performance of MIMO for low- altitude A-G systems. The geometry and propagation loss characteristics of the model are defined, and example results for a hilly rural environment are shown for 2x2 Spatial Multiplexing (SMX) and Space-Time Block Coding (STBC). The results predict that an uncoded multi-carrier system can use STBC for gains up to 16 dB or use SMX to increase the throughput by a factor of two.

[1]  W. G. Newhall,et al.  Radio Channel Measurements and Modeling for Smart Antenna Array Systems Using a Software Radio Receiver , 2003 .

[2]  Justin C.-I. Chuang.  The Effects of Time Delay Spread on Portable Radio Communications Channels with Digital Modulation , 1987, IEEE J. Sel. Areas Commun..

[3]  Balasubramaniam Natarajan,et al.  Generation of correlated Rayleigh fading envelopes for spread spectrum applications , 2000, IEEE Communications Letters.

[4]  Fabio Dovis,et al.  On the use of HALE platforms as GSM base stations , 2001, IEEE Wirel. Commun..

[5]  Siavash M. Alamouti,et al.  A simple transmit diversity technique for wireless communications , 1998, IEEE J. Sel. Areas Commun..

[6]  Deniz Unsalan,et al.  A low cost alternative for satellites- tethered ultra-high altitude balloons , 2011, Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011.

[7]  Jeffrey H. Reed,et al.  A geometric air-to-ground radio channel model , 2002, MILCOM 2002. Proceedings.

[8]  Fotini-Niovi Pavlidou,et al.  Broadband communications via high-altitude platforms: a survey , 2005, IEEE Communications Surveys & Tutorials.

[9]  Babak Daneshrad,et al.  MIMO performance evaluation for airborne wireless communication systems , 2011, 2011 - MILCOM 2011 Military Communications Conference.

[10]  Jeffrey H. Reed,et al.  Wideband air-to-ground radio channel measurements using an antenna array at 2 GHz for low-altitude operations , 2003, IEEE Military Communications Conference, 2003. MILCOM 2003..

[11]  Goran M. Djuknic,et al.  Establishing wireless communications services via high-altitude aeronautical platforms: a concept whose time has come? , 1997, IEEE Commun. Mag..

[12]  Dario Vlah,et al.  Measuring diversity on a low-altitude UAV in a ground-to-air wireless 802.11 mesh network , 2010, 2010 IEEE Globecom Workshops.

[13]  R. Giuliano,et al.  WiMAX networks for emergency management based on UAVs , 2012, 2012 IEEE First AESS European Conference on Satellite Telecommunications (ESTEL).