3-D cellular systems for air-land communications
Szu‐Lin Su, Wen-Chang Pan · 2002
In VHF air/ground communication systems, the radio-line-of-sight (RLOS) between a ground station and an aircraft must exist. An aircraft at a certain altitude may be interfered by those signals from an over-horizontal stations using the same frequency band. A simple frequency management method is proposed to solve this problem and to get the efficient frequency-reuse to alleviate the frequency congestion in the air traffic control (ATC), flight services and mobile communication services. The authors apply the concept of the terrestrial mobile cellular system to design the 3D cellular system and find the capacities of systems with different access schemes, such as FDMA (interference free), TDMA, and CDMA.>