Beamforming: Definition, Requirements, Techniques, Pros & Cons: Beamforming is a technique used in processing a signal which is used in sensor arrays for direct signal transmission and reception. This can be achieved by combining elements of an antenna array in a way that the signals at particular angles experience a constructive interference while other signals experience a destructive interference. The Beam-Forming can be utilized at both in the transmitting and the receiving end in order to gain spatial selectivity.
Beamforming is now playing a vital role in Wi-Fi routers. The concept might look simpler but it is very hard to execute. Beam-forming is now a common feature in 802.11ac (Wireless AC) routers. The beamforming was an optional feature for the 802.11n (Wireless N) but there was plenty of confusion on how it works as the receiver should also adopt the same technology. If the receiver adopts a different technology, then the beam-forming doesn’t work.
How beamforming works
In simple terms, a wireless router or access points which do not adopt or support beam-forming broadcast data equally in all the directions. This is similar to a bulb which radiates light in all direction equally. It doesn’t point in a particular direction. The process of utilizing the light at one particular point (at a place or a point where it is necessary) is an example for beam-forming. The best example is a Spot Light. Similar way, the devices which support beam-forming concentrates their signal on each client.
The process of concentrating the data transmission in a specific direction so that the data reaches the targeted device instead of getting wasted in the atmosphere is called as Wifi Beamforming. In a cultural stage, instead of using a light which makes everything visible, spotlights are used to show particular person or objects. It adds more attention to the object or the person. Similar way, when the signal is transmitted in a particular direction instead of spreading it all over, Data losses will be saved.
Beamforming with 802.11n and 802.11ac
Wifi beam-forming was an optional feature on the 802.11n (Wireless N) devices. But many computers and laptops didn’t support the technology used in beamforming. So it was very difficult to implement and it was unaffordable as well. The receivers or the clients can get an 802.11n kit to make your device compatible but it was unaffordable as well. In recent times, many higher-end devices support 802.11ac standard which is compatible with wifi beam-forming. Hence, if you using a router which is compatible with beamforming, then you can utilize the advantages of 802.11ac standard.
You just need devices which supports this technology. For example, 802.11ac devices support this technology and you can utilize the power of beam forming through these devices.