Adaptive CDMA Scheme as a Rain Fade Countermeasure in Ka-Band Geosynchronous Satellite Communications

スポンサーリンク

概要

• 論文の詳細を見る

• To achieve high link availability at Ka-band geosynchronous satellite communication systems, an adaptive CDMA scheme as a rain fade countermeasure is proposed. The proposed adaptive CDMA scheme reserves and shares orthogonal sequences to countermeasure a rain fade. In the adaptive CDMA scheme, the base station allocates a set of orthogonal sequences to each user, and the number of sequences in a set is determined by the amount of rain attenuation. A symbol repetition technique is also used to compensate signal energy loss due to the rain fade. Our results show that when the base station has 64 free orthogonal codes, the adaptive CDMA scheme can save on its power by 4.2 dB compared to conventional CDMA scheme. The occupation rate of codes also shows that the adaptive CDMA can support multiple users simultaneously in even severe rain fade condition.

• 社団法人電子情報通信学会の論文
• 2000-12-25

著者

• Kim Dong-hee

  Department Of Electrical & Electronic Engineering Yonsei University

• Kim Dong-hee

  Department Of Anesthesiology Dankook University

• Whang Keum-cham

  Department Of Electrical & Electronic Engineering Yonsei University

• Hwang Seung-hoon

  Advanced Technology Research Department Next Generation Communication Laboratory Lg Information And

• Hwang Seung-hoon

  Advanced Technology Research Dept. Next Generation Communication Lab. Lg Electronics Inc.

• PAK Ui-Young

  Agency for Defense Development

関連論文

• Malignant Carcinoid Tumor of the Common Bile Duct : Report of a Case
• Fabrication of Nano-Sized ITO Powder from Waste ITO Target by Spray Pyrolysis Process
• Rapid Converging Adaptive Receiver in DS-CDMA Systems
• Power Control and Macrodiversity as Fade Countermeasures in Satellite CDMA Transmission at Ka-Band
• Adaptive CDMA Scheme as a Rain Fade Countermeasure in Ka-Band Geosynchronous Satellite Communications

スポンサーリンク