Integration and Simulation of Smart Antennas Không giống như hầu hết các công việc cho anten thông minh bao phủ từng khu vực riêng biệt (thiết kế ăng-ten-mảng, xử lý tín hiệu, các thuật toán thông tin liên lạc và thông qua mạng), công việc trong chương này có thể được coi là một nỗ lực trên ăng-ten thông minh để xem xét và tích hợp thiết kế mảng ăng-ten, sự phát triển của các thuật toán xử lý tín hiệu (đối với góc độ lập dự toán đến và thích nghi beamforming), chiến lược cho cuộc chiến chống phai. | 107 CHAPTER 7 Integration and Simulation of Smart Antennas Unlike most of the work for smart antennas that covered each area individually antenna-array design signal processing communications algorithms and network throughput the work in this chapter may be considered as an effort on smart antennas that examines and integrates antenna array design the development of signal processing algorithms for angle of arrival estimation and adaptive beamforming strategies for combating fading and the impact on the network throughput 24 171-174 . In particular this work considers problems dealing with the impact of the antenna design on the network throughput. In addition fading channels and tradeoffs between diversity combining and adaptive beamforming are examined as well as channel coding to improve the system performance. OVERVIEW The main goal of this chapter and reported in 24 171-174 is to design smart antennas for Mobile Ad-Hoc Network MANET devices operating at a frequency of 20 GHz. This objective was instrumental in selecting elements that can conform to the geometry of the device and an array architecture that could control the radiation pattern both in the azimuth and elevation directions. Consequently this led to the selection of microstrip patches arranged in a planar configuration. In addition the number of radiating elements was chosen to meet beamwidth requirements while maintaining reasonable cost and complexity for hardware implementation. To analyze the average network throughput a channel access protocol was proposed for MANETs employing smart antennas. The proposed protocol was based on the MAC protocol of IEEE WLANs forTDMA environment 175 . Results showed that network throuput was influenced by both the number of elements in a planar antenna array and different array designs uniform Tschebyscheff adaptive . Moreover the network throughput analysis was extended to impose guidelines on the beamforming algorithm convergence rate. Finally the .
