What is Ultra Wideband Technology (UWB) – Explained
Aug. 25, 2020Ultra Wideband Technology (UWB) is the hot new topic in the town, especially after Samsung unveiled theGalaxy Note20 Ultrawith a UWB chip in tow. Last year, Apple released the iPhone 11 series with a UWB chip (U1) under the hood. Many believe that Ultra Wideband is the new wireless protocol that is going to replace Bluetooth, but is that statement anywhere close to reality? Well, in this article, we are going to explain everything about Ultra Wideband Technology (UWB) so that you get a clear picture of what is to come. With that in mind, let’s now go through the article and learn about UWB in complete detail.
Everything About Ultra Wideband Technology (UWB)
Here, we are going to discuss all the aspects of Ultra Wideband Technology: from its very definition to the working mechanism. You can click on the link below and easily jump to the relevant section.
Before anything, let us learn what exactly is Ultra Wideband Technology in lucid terms. Just like WiFi and Bluetooth, Ultra Wideband Technology (shortly known as UWB) isa wireless technology. It leverages radio signals to communicate and transfer data between different devices. But there are some distinct characteristics of UWB that make it a powerful radio technology.
For instance, UWB uses a broad spectrum of frequencies (much higher than WiFi and Bluetooth; in GHz) which translates to significantly higher bandwidth (faster transfer speed). In addition, it consumes much less power than WiFi and Bluetooth standards. However, there is a downside to it. Due to the higher frequency, itcan’t travel farther or penetrate obstacles like walls— similar to the 5GHz WiFi band or5G mobile network. So for UWB to work properly, a clear line of sight is extremely necessary.Source: Thomas George C / Slideshare.net
Other than that, there is one important dimension to UWB that you should make note of:positional accuracy. UWB can find the direction and precise location down to the centimeter level of a device. Due to such high accuracy, UWB is considered as the best wireless protocol for locating and communicating with devices in a quick and accurate manner.
Thus, UWB constitutes as a short-range Personal Area Network (PAN) that features high frequencies,high transfer speed, low-power consumption and precise positional accuracy. A perfect standard for quickly discovering and sharing huge chunks of data between devices.
Now that you have got the basics, let us get a bit technical. As I mentioned above, UWB operates in very high frequencies, to be precise, within the range of 3.1 to 10.6 GHz. In other words, this is simply another category of radio spectrum. Coming to the working mechanism, a UWB-equipped deviceemits signals (called pulse radio)over a large bandwidth in all directions. By the way, since the frequencies are so high, it does not interfere with other nearby radio signals which is a big advantage.
When another UWB-equipped device picks the pulse radio, it relays the information to the host device. Now usingTime-of-flight (ToF) and Angle-of-arrival(AoA) data, the device determines the distance and accurate position of the emitting device. If you have read anything aboutBluetooth 5.1, you would know that Bluetooth uses the same technique to find the direction of devices.Source: Tech Briefs
However, due to the higher frequencies used in UWB, the host device isable to repeat pulse radio tremendouslywithin a second, making the device instantly discoverable. This immediate broadcasting of pulse radio is called repetition rate and it’s usually within the range of two gigapulses per second (which is an astronomical figure). Due to this high repetition rate, UWB is able to instantly discover, locate and transfer data without losing any moment. And that is how UWB brings immediate spatial and directional awareness around a device.
The primary difference between UWB and Bluetooth/WiFi is the lack of positional and directional abilities in the latter. While Bluetooth did bring direction finding with 5.1 release, it’snot as fast and accurate as UWB. On top of that, Ultra Wideband consumes much less power than Bluetooth and WiFi because UWB generates radio energy at specific time intervals instead of random frequency response.
Apart from that, there is a categorical difference in how all three technologies leverage radio frequency. While Bluetooth operates within the frequency band of 2.4GHz (channel bandwidth of 1MHz), WiFi generally operates in 2.4GHz and 5GHz (channel bandwidth of 20 – 40MHz). Lastly, UWB operates from 3.1GHz to 10.6GHz (channel bandwidth ranges from500MHz to 7.5GHz). By the way, the more the channel bandwidth, the better the transfer speed.
Finally, there is a difference in the objectives of all three wireless technologies. For instance, WiFi is used for long-range internet communication from a LAN; Bluetooth is used for short-range, low-bandwidth communication and finally,UWB has its own purpose— short-range, high-bandwidth communication with directional awareness.
Similarly, Samsung has incorporated a UWB chip developed by NXP on the Galaxy Note20 Ultra. It will help youinstantly discover nearby contactsand share files usingGoogle’s Nearby Share feature. Apart from that, you can get a taste of UWB technology in the new SmartThings Find app. Using Augmented reality, you can find the position of other UWB-equipped devices. That’s really cool, right?
All said and done, it seems UWB will bring a paradigm shift in the Internet-of-things (IoT) space. The ability to control smart devices like lights, speakers just by pointing at them would really solve the problem of quick accessibility. Apart from that, we may see more applications of UWB in Apple’s upcomingAirTag and App Clipsfeature. And it would be really awesome if more smartphone manufacturers incorporate this new hardware and Google brings some great features built on top of UWB.
So that was all about Ultra Wideband Technology and how this fascinating new wireless protocol works. While we have discussed its definition, working mechanism, pros, cons, etc., the question remains: where will Ultra Wideband Technology end up in a few years? Is UWB going to replace Bluetooth?
Well, I am not sure where UWB will head to, but at this point, it seems UWB holds huge potential and can be a game-changer for the interconnected future. Anyway, that is all from us. But what do you think about Ultra Wideband Technology? Tell us in the comments section below.
Passionate about Windows, ChromeOS, Android, security and privacy issues. Have a penchant to solve everyday computing problems.
