Xiaomi company has a special liking for beamforming technology. How much do you know about this technology?

Beamforming technology is a signal processing technology that uses sensor array to send and receive signals directionally. At present, this technology has not been widely used in mobile phones. Xiaomi Company recently made a wave of publicity for their Xiaomi mobile phone to promote the technology of long-distance charging.

The principle of charging from a distance is applied to Apollo beam forming technology.

By adjusting the parameters of the basic unit of phased array, beamforming technology can make signals from some angles get constructive interference, while signals from other angles get destructive interference. Beamforming can be used for signal transmitters and signal receivers. Taking underwater sonar launch as an example, we hope to send concentrated and sharp sonar signals to distant ships. If each sonar generator of sonar transmitter sends sonar signals to a ship at the same time, it is impossible for all sonar signal generators to reach the ship at the same time because of the azimuth angle of the distant ship, some sonar signals arrive on the ship first, and some sonar signals arrive on the ship later. Using beamforming technology, we can adjust the signal emission time of different sonar generators (the first signal is far away from the ship and the second signal is close to the ship), so that all sonar signals can hit the ship at the same time, and a powerful sonar pulse signal can hit the ship.

The goal of beamforming technology is to form the best combination or distribution of baseband signals, mainly to compensate the signal distortion caused by space and other factors in the process of wireless propagation, and also to reduce the mutual interference between users of the same sex.

Take the current WiFi technology, the coverage and transmission rate are limited. You have been trying to break through its coverage and transmission rate, and strive to expand its coverage and improve its transmission rate. In the future, the networked family may be the main development trend. Computers, printers, telephones and game consoles on different floors go through the wall and then connect to the WiFi at home. In this case, it is particularly valuable not to expand the coverage and improve the speed. Not only families but also enterprises will benefit from this improvement, so one of the most effective technologies to improve the connection performance is transmit beamforming technology.

In the future, beamforming technology will play an indelible role. Beamforming technology will not bring the problems brought by general technology, such as when we need to do some large-scale hardware upgrades. We can transmit the advantages of multiple antennas and improve the overall gain of the whole data stream. We can simply regard this technology as a form of hierarchical transmission over known channels.