Application of UWB Technology in PEPS

UWB (Ultra Wide band, ultra-wideband wireless technology) is a non-carrier communication technology, which follows the 802.15.4a standard, using nanosecond to microsecond non-sine wave narrow pulse to transmit data, achieving a wide (channel bandwidth) 500MHz) to transmit extremely low-power signals (about 2 ns per short pulse) on the spectrum. It has many advantages such as low system complexity, low transmitted signal power spectral density, insensitivity to signal fading, low interception ability, and high positioning accuracy, making it very suitable for high-speed wireless access in high-density multipath places such as indoors. . UWB realizes ranging and positioning applications by using three measurement algorithms: Time of Flight (TOA/TOF), Time Difference of Flight (TDOA), and Angle of Arrival (AOA). At present, the application field of this technology has penetrated from industrial fields such as smart manufacturing, energy and chemical industry, warehousing and logistics, and smart cities to consumer fields such as mobile phones, automobiles, and smart homes, and presents an increasingly broad market prospect.
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full name of the uwb FIRA Alliance and the PEPS FiRa Alliance is fine ranging. The FiRa Alliance was first formed by HID Global, Samsung, Sony, Bosch, LitePoint, and TTA. It aims to establish a cross-chipset, equipment and foundation through standard formulation and certification. The interoperable UWB ecosystem of facility services uses UWB technology to promote seamless user experience. At the beginning of its establishment, no Chinese manufacturer joined, which made people question the technical capabilities of Chinese technology companies in the UWB field, and they could not participate in the design and customization of standards.
With the joining of two high-level Contributor members, Xiaomi and Qingyanxunke, in early 2020, it not only breaks the doubts from outsiders, but also promotes the UWB industry chain from upstream chips to downstream applications to become more complete, making FIRA alliance high-level members The industry chain is more diversified and open, including upstream vendors that provide UWB radio frequency chips, midstream vendors that provide ranging/positioning products and solutions, and downstream smart terminals and smart home application vendors. There is no doubt that this kind of membership structure is more conducive to the development of the FiRa Alliance and is more comprehensive in the application of UWB technology and standard formulation.
Recently, UWB technology has set off an application boom in the consumer market with application functions such as seamless access control, location services, and device-to-device point-to-point services. Among them, the seamless access control function based on UWB makes the landing application of the keyless entry system (PEPS) more mature: it can not only realize the identification of personal orientation or distance based on UWB judgment, and allow the use case to define the precise scope of intent to avoid false triggers, but also overcome In the past, the shortcomings of mainly relying on signal strength to determine the distance and location, through the accurate calculation of the actual physical distance, resolved the possibility of the relay wireless signal being intercepted and amplified, greatly improving safety and reliability. In addition, the UWB chip embedded in mobile phones and smart wearable devices can also be combined with other connection technologies such as Bluetooth BLE, near field communication (NFC), and lock or unlock the door can be successfully completed even when the device is off or in sleep mode. The
composition of high-level members of the FIRA Alliance also reflects to a certain extent that the keyless entry system (PEPS) has become one of the very important directions for UWB technology applications. Automotive applications, mobile phone manufacturers, and access control manufacturers occupy high-level members. More than half of the number, I have to mention here that Qingyanxunke and Xiaomi are only two Chinese companies in the field of UWB in the keyless entry system (PEPS) field. Xiaomi has set foot in this field through mobile smart terminals. As a technical solution provider, Tsinghua Technology has developed the industry’s first UWB/BLE dual-mode indoor positioning and ranging chip TSG5161L-S in early 2020, which is compatible with UWB and Bluetooth 5.1. It satisfies the UWB ranging and direction finding functions, making it a leader in the industry in the field of keyless entry systems (PEPS).