波束切換和自適應波束形成在802.11n中最佳覆蓋規(guī)劃性能的對比分析

1、華中科技大學碩士學位論文波束切換和自適應波束形成在802.11n中最佳覆蓋規(guī)劃性能的對比分析姓名：易路申請學位級別：碩士專業(yè)：信息與通信工程指導教師：李青俠2010-05-20III Abstract Antenna array systems are widely recognized as an enabling technology for addressing the demand of wireless network cap

2、acity and ensure a wide range of coverage solutions when employed in place of traditional fixed-coverage sector antennas. Particularly, switched-beam antenna systems are believed to offer a robust implementation against

3、multipath propagation effects and reduced complexity that is inherent with fully adaptive implementations which offer relatively higher degree of flexibility to changing coverage environment. This document describes a co

4、mparative analysis between switched beam and adaptive array beamforming to provide a required coverage, increase capacity, guarantee optimal throughput and a level of quality of services. The simulation results analyze t

5、he effect of practical antenna array patterns and the impact of beamforming and beam switching on coverage planning and performance right at the design and implementation stage. The results show that it’s possible to ove

6、rcome most challenging coverage issues and optimize the array intelligence in a bid to extend the range and coverage in a controlled overlap, grating effect and holes cover-up, increase capacity and reduce downlink inter

7、ference by analyzing the relative applicable number of antenna elements, their physical configuration, spacing and phase shifting. Key words: Antenna arrays, beamforming, SIR, beam pattern, smart antennas, switched-beam