3-D Cellular Systems for Air-land Communications

• Main Authors: Wen-Chang Pan, 潘文昌
• Other Authors: Szu-Lin Su
• Format: Others
• Language: en_US
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/83353102071608591254

碩士 === 國立成功大學 === 電機工程研究所 === 82 === In VHF air/ground communication systems, the radio-line- of- signt (RLOS) between a ground station and an aircraft must exist. An aircraft at a certain altitude may be interfered by those signals from over-horizontal stations using the same frequency band. A simple frequency management method is proposed in this paper to solve this problem and to get the efficient frequency-reuse to alleviate the frequency congestion in air traffic control (ATC), flight services and mobile communication services. We apply the concept of the terrestrial mobile cellular system to design the 3D cellular systems and find the capacities of systems with different access schemes, such as interference free, FDMA, TDMA, and CDMA.