Live Review: New Opportunities in UWB Market on June 23

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Live Review: New Opportunities in UWB Market on June 23 [Copy link]

Live broadcast time: June 23 (Thursday) 14:00-16:25
Live broadcast topic: New opportunities in the UWB market
Watch replay: Click to watch

Questions and Answers Summary:

Question content	Reply content
What is the accuracy of UWB positioning?	Distance measurement 10cm
Reverse TDOA, is there any commercial case?	Yes, some larger industrial areas, substations, etc.
Is reverse TDOA a beacon application? That is, the beacon is battery-powered and does not require construction?	It can be imagined that the TDOA tag and the base station exchange, the reverse TDOA calculation is placed on the tag side, and the tag needs a rechargeable battery
Will Murata Electronics provide a commercial solution? For example, TDOA clock synchronization. Our company has always wanted to do TDOA, but has not yet solved the clock synchronization problem.	We provide complete solutions, including modules + algorithms + PCBA design reference (based on customer products) + antenna simulation, design, etc.
Can UWB use capacitors/resistors as clocks?	Because UWB requires a high clock accuracy, the clock built with RC is difficult to meet the accuracy requirements of UWB.
Can't the crystal frequency be fine-tuned by capacitors?	Yes, Murata can provide testing services. If the peripheral circuit conditions do not match, we will give suggestions for adjusting the peripheral circuit conditions including capacitance.
Is the supply normal?	Murata crystals currently have no supply issues.
What are UWB's requirements for crystals?	The size is generally 2.0mm*1.6mm or smaller, and the resonant frequency is up to 38.4MHz. Some applications also use other frequencies (such as 55.2MHz).
Hello, Mr. Cui! When you talk about high-precision crystal oscillators, do you use temperature-compensated crystal oscillators or thermistor crystals?	Hello Henry, the accuracy just mentioned refers to the passive crystal oscillator, that is, the crystal with a passive initial frequency deviation of ±10ppm can basically meet the requirements of unilateral and bidirectional ranging;
Hello, Mr. Cui! When you talk about high-precision crystal oscillators, do you use temperature-compensated crystal oscillators or thermistor crystals?	Crystals with an initial frequency deviation of ±10ppm can basically meet the accuracy requirements of SS-TWR, and crystals with an initial frequency deviation of ±20ppm can basically meet the accuracy requirements of DS-TWR.
Hello, Mr. Cui! When you talk about high-precision crystal oscillators, do you use temperature-compensated crystal oscillators or thermistor crystals?	The above refers to the general temperature range (-30~+105℃). If a larger operating temperature range is required, such as a high temperature of +125℃, as the temperature drift increases, the total frequency deviation of the general passive crystal oscillator may not meet the accuracy requirements of UWB.
Hello, Mr. Cui! When you talk about high-precision crystal oscillators, do you use temperature-compensated crystal oscillators or thermistor crystals?	At this time, we need the TSX (thermistor crystal oscillator) you mentioned or the higher precision TCXO (temperature compensated crystal oscillator).