A Multi-beam Selection Smart Antenna Communication System

Abstract

The invention discloses a multi-beam selection intelligent antenna communication system which comprises an antenna control system and an antenna array. The antenna control system comprises a field programmable gate array (FPGA) logic control module, a wireless transceiver, a digital-to-analog conversion module, a phase shifter and a central processing unit (CPU). Radio frequency (RF) signals of the wireless transceiver reach the antenna array through the phase shifter. Two-path R / T control signals of the CPU and the wireless transceiver generate 16-path R / T signals through the FPGA logic control module, so as to control the receiving / transmission of the antenna array under the matching of the digital-to-analog conversion module. The phase shifter is a 360-degree continuous phase shifter formed by a circulator and at least one variode. The FPGA logic control module controls the digital-to-analog conversion module to generate an analog voltage to control a bias voltage of the variode, so as to change capacitance of the variode and achieve the objective of changing a radio frequency phase.

Description

technical field [0001] The present invention relates to an antenna communication system in the technical field of wireless communication, in particular to a multi-beam selection intelligent multi-beam selection intelligent antenna communication system. Background technique [0002] With the continuous development and improvement of WIFI technology, WIFI has become an indispensable means of communication in people's daily life, and has also become an extremely convenient communication technology favored by governments and enterprises. Especially in the new round of smart city construction boom, WIFI technology will surely shine. However, many problems have occurred during the commercialization of WIFI, and many of these problems have seriously affected the user experience of end users. [0003] 1. System capacity problem [0004] Many users have a deep understanding that in densely populated areas such as hospitals, coffee shops, exhibition halls or shopping malls, there is...

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Problems solved by technology

[0004] Many users have a deep understanding. In densely populated areas such as hospitals, coffee shops, exhibition halls or shopping malls, there is obviously a free WIFI signal and the signal strength is strong, so they can connect, but they just cannot access the Internet.

This is because the WIFI standard protocol is a conflict detection / conflict avoidance strategy. When the number of connected terminals reaches more than 32, users’ requests to access the Internet increase, and the competition for bandwidth is very serious, causing everyone to be unable to communicate.

Just like the expressway has 3 lanes, but there are 10 traffic flows on the expressway, the congestion causes the traffic flow to be slow, or even stagnant, so there is no way to circulate

[0005] 2. Interference problem

For example, if the conference room has a capacity of 100-200 people, and to satisfy 100-200 people surfing the Internet at the same time, it is necessary to install multiple APs in the conference room. Due to the limited space of the conference room, the wireless electromagnetic waves between multiple APs interfere very seriously, which will cause users The experience of connecting to the AP is significantly reduced

[0007] 3. Insufficient AP coverage

[0008] Most APs use an omnidirectional antenna design, which will cause electromagnetic wave energy to diverge. In order to increase the coverage, the wireless transmission power of the AP can only be simply increased. Large transmission power is difficult in the design and adjustment of radio frequency parameters. If the coefficient is increased, if it is not done well, it will cause a decrease in receiving sensitivity

[0009] 4. WIFI positioning problem

[0010] When the omni-directional antenna receives the data packets from the terminal, it cannot judge the direction, but can only judge the radius range of how many meters away from the AP as the center.

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