| Summary: | 碩士 === 國立交通大學 === 網路工程研究所 === 105 === IEEE 802.11ac is a wireless networking standard in the 802.11 family, developed in IEEE Standards Association process, providing high-throughput wireless local area networks(WLAN) on the 5 GHz band. The specification has multi-station throughput of at least 1 gigabit per second. 802.11ac add a new technology called beamforming. Beamforming is a signal processing technique used in sensor arrays for directional signal transmission or reception. To change the directionality of the array when transmitting, a beamformer controls the phase and relative amplitude of the signal at each transmitter, in order to create a pattern of constructive and destructive interference in the wave front. In order to decreasing the interference of different AP. We use directional-beam to avoid the interference, and getting better performance of the handoff procedure. In the simulation, we use MATLAB to simulate the signal transmit in the space. Furthermore, the simulator can change the shape, for instance, more wall in the space. According the result of simulation, our algorithm can improve throughput about 7%-23%.
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