Hotron UWB indoor positioning bracelet is a positioning product based on UWB indoor positioning technology, mainly used in prisons, detention centers, factories, warehouses, etc. The UWB indoor positioning bracelet can be used because the UWB indoor positioning technology has the following characteristics.
UWB technology applied to indoor positioning, has the following characteristics:
(1) Large system capacity. The increase in bandwidth increases the channel capacity is much larger than the effect brought about by the rise in signal power, which is precisely the theoretical mechanism of the proposed ultra-wideband technology. The number of users of ultra-wideband radio systems is significantly higher than that of 3G systems.
(2) fast data transmission speed. UWB system uses the ultra-wide bandwidth of the last gigahertz, according to the Shannon channel capacity formula, even if the transmit signal power density control is very low, can also realize the high information rate. Typically, its maximum data transfer rate can reach several hundred megabits per second to gigabits per second.
(3) strong multipath resolution, UWB due to its very high operating frequency and very low duty cycle and has a very high resolution, narrow pulse multipath signal is not easy to overlap in time, it is easy to separate out the multipath component, so it can make full use of the energy of the transmitted signal. Experiments show that the conventional radio signal multipath fading as deep as 10 to 30dB multipath environment, UWB signal fading less than 5dB at most.
(4) good concealment. Because the spectrum of UWB is very wide, the energy density is very low, so the information transmission security is high. On the other hand, because of the low energy density, the interference of UWB devices with other devices is very low.
(5) Precise localization. Impulse has a very high positioning accuracy, the use of ultra-wideband radio communication, can be indoors and underground for precise positioning, the accuracy of up to 2 centimeters, the general accuracy of 15 centimeters. In contrast, the GPS positioning system can only work within the visible range of GPS positioning satellites. Unlike GPS, which provides an absolute geographic location, ultrashort pulse locators can give a relative location with centimeter-level positioning accuracy.
(6) strong anti-jamming ability, UWB spread spectrum processing gain depends mainly on the duty cycle of the pulse and the number of pulses used to send each bit. the duty cycle of UWB is generally 0.01 ~ 0.001, with much higher than the other spread spectrum system processing gain, strong anti-jamming ability. In general, UWB anti-jamming processing gain is more than 50dB.
(7) low power consumption. UWB wireless communication system receiver does not have a local oscillator, amplifier, phase-locked loop (PLL), voltage-controlled oscillator (VCO), mixer, etc., and thus simple structure, equipment costs will be very low. Since UWB signals do not require a carrier wave, but use intermittent pulses to send data, the pulse duration is very short, generally between 0.20 and 1.5ns, and has a very low duty factor, so it only requires a very low power supply power. The general UWB system only requires 50 to 70mW of power, which is one tenth of Bluetooth technology.