29-08-2009, 12:36 AM
http://elec.york.ac.uk/comms/papers/grac...obecom.pdf
http://skylarcHAPsmainpres2000/HAPSmainpres.pdf
http://ieeexplore.ieeexpls/abs_all.jsp?arnumber=831775
http://skylarcHAPsmainpres2000/HAPSmainpres.pdf
http://ieeexplore.ieeexpls/abs_all.jsp?arnumber=831775