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Volume 28 Issue 8
Sep.  2010
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Cheng Yue-bo, Jin Rong-hong, Liu Bo, Geng Jun-ping. An Embedded Multibeam Configuration for CDMA Communication Systems on HAPS[J]. Journal of Electronics & Information Technology, 2006, 28(8): 1395-1399.
Citation: Cheng Yue-bo, Jin Rong-hong, Liu Bo, Geng Jun-ping. An Embedded Multibeam Configuration for CDMA Communication Systems on HAPS[J]. Journal of Electronics & Information Technology, 2006, 28(8): 1395-1399.

An Embedded Multibeam Configuration for CDMA Communication Systems on HAPS

  • Received Date: 2004-11-19
  • Rev Recd Date: 2005-05-08
  • Publish Date: 2006-08-19
  • An improvement of the micro/macro beam configuration used in HAPS (High Altitude Platform System) CDMA systems is proposed, in which the model employed for the optimization of the system is complex but more practical, especially in the improvement of the array pattern and the calculation of channel interferences. The configuration is expected to satisfy the requirement of CDMA systems on HAPS, and the relief of traffic burden in hot spot areas can be achieved by embedding micro-beams in the macro-beams at the hot spot locations. The optimization is realized by the adjustment of the micro-beam for different user distributions and different hot spot locations. The numerical results show that the hot spot problem can be relieved efficiently with the presented structure, and a higher and more stable system capacity is expectable despite the variation of the user distribution.
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  • Tong Z, Wu Y, Zhu H, Fu G, Jin R. Feasibility study of stratospheric platform and information systems in China, 2000 Stratospheric Platform System Workshop[C]. Tokyo, Japan, 2000: 60.68.[2]Niu Z.[J].Jin R, Liu S, Fu G, Wu Y, Tong Z. RD progress on stratospheric communication systems in China.2003,:-[3]ITU-R Doc. Recommendation ITU-RF.1569, Technical and operational characteristics for the fixed service using high altitude platform stations in the bands 27.528.35 GHz and 3131.3 GHz, ITU-R Doc. 9BL/25, May 2002.[4]Ryu Nitura, Masayuki Oodo, Yoshihiro Hase, Takayuki Inaba, Teijiro Sakamoto, Mikio Suzuki. Digital beamforming array antenna on-board stratospheric platform for quick response SDMA in the band 31/28 GHz, International Symposium onWireless Personal Multimedia Communications (WPMC'01)[C], Sep. 2001.[5]Cheng Yuebo, Jin Ronghong, Jiang Ran, Liu Bo. Hot spot relief with embedded beam for CDMA systems in HAPS, Journal of Electronics Information Technology, Journal of Electronics (China), 2006, 23(2): 172-175.[6]Joseph Shapira. Microcell engineering in CDMA cellular networks[J], IEEE Trans. on Vehicular Technology, 1994, 43(4): 817825.[7]Kim D H, Lee D D, Kim H J , Whang K C. Capacity analysis of macro/microcell CDMA with power ratio control and tiltedantenna[J]. IEEE Trans. on Vehicular Technology, 2000, 49(1): 3442.[8]Thornton J , Grace D. Optimizing an array of antennas for cellularcoverage from a high altitude platform[J]. IEEE Tran. on WirelessCommunications, 2003, 2(3): 484492.[9]Foo Y C, Lim W L, Tafazolli R, Barclay L. Other-cell interference and reverse link capacity of high altitude platform station CDMA system[J]. Electronics Letters, 2000, 36(22): 18811882.
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