tailieunhanh - TEAM FLY WIRELESS NETWORK DEPLOYMENTS phần 7

tác giả chứng minh rằng bằng cách sử dụng mô hình này, họ đã có thể có hiệu quả mô phỏng hai giai đoạn khuếch đại MESFET GaAs và chứng minh sự phù hợp của thiết bị với yêu cầu phát thải cho PCS CDMA. Do đạt được và giai đoạn biến dạng, phổ lại kết quả tăng trưởng tại đầu ra của PA | Traffic Analysis ofAMPS ANSI-136 Systems 151 directed retry and radio resource allocation according to the mobility profile of the odvanlagus. as compared to cell splitting are the savings in beacon frequency assignment and more flexibi 1 ity in frequency assignment. In fact all the relays in a cell use the aame beacon frequency. The advantages are somew hat counter-balanced by the increase number of points of transmission in a cell. However a relay needs to radiate only 0 few mw of power. Hardware for traffic and beacon carriers and the fntenna can basily be integrated in the existing urban equipment lamp post etc . . Perfomance results for a GSM based outdoor network for speech services have been presented. These can be easily extended to other TDMA systems. The applicability of distributed coverage to iliird generation systems has also been studied IMiliailescti. 99 . The techniques presented in dns paper are also applicable to unsure aontinuous coverage in Oifferent environment indoor to outdoor as well as for tOroughput enhancement in applications w ith variable bandwidth allocation Brouet 99 Ka mi. 00 . REFERENCES I Andersen 95 Andersen . Rappaport T. Yoshida S. Propagation Measurements and Models for Wireless Communication Channels IEEE Communication Magazine January 1995. AMsyavisitakul 96 Ariyavisitakul S. Dare I e TO. Greenstein TO Philips . Ohankaranarayanan . Perfomance of Simulcast Wireless Technique for Personal Commnnication Systems IEEE Journal on Selected Areas on Communications vol. 14 pp. 632-643 May 1996. Bégassat 98 Bégassat Y. Kumar V. Interference Analysis in an Original TDMA-based High Density Cellular Radio Network Proceedings ofETC 98 Ottawa May 1998. SBrouet 99 Drouet J. Nousbaum p. Performance of a elf-organising GSM fased System with Distributed Coverage for High Density Indoor Applications Proceedings ofVTC 99 Amsterdam Sept. 1999. Chamere 97 Charrière p. Drouet J. Kumar V. Optimum Channel election .