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作者机构:Space Syst Loral Palo Alto CA USA Globastar San Jose CA 95164 USA
出 版 物:《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》 (IEEE Trans Antennas Propag)
年 卷 期:1998年第46卷第8期
页 面:1244-1244页
核心收录:
学科分类:0810[工学-信息与通信工程] 0808[工学-电气工程] 08[工学]
主 题:Satellite broadcasting Multiaccess communication Mobile communication Telephony Artificial satellites Satellite ground stations Downlink Circuits Frequency conversion Modulation coding
摘 要:The Globalstar cellular-telephone satellite system is described, including its use of code-division multiple access (CDMA) as the basic modulation scheme. Use of diversity for signal quality as well as power control is described, Development of the complex array antennas for L-band (1.6 GHz) and S-band (2.5 GHz) communication with the hand-held radios is described in detail.