Features of low power consumption and high precision uwb indoor positioning technology, UWB (ULTRAWideband) is a carrierless communication technology that transmits data using nanosecond to microsecond non-sinusoidal narrow pulses. UWB (ULTRAWideband) is a non-carrier wave communication technology that transmits data using nanosecond to microsecond non-sinusoidal narrow pulses. By transmitting a very low power signal to a very low power signal, a very low power signal is transmitted over a very wide spectrum.
uwb indoor positioning technology technology overview
UWB (UltraWideband) is a carrier-free communication technology that transmits data using nanosecond to microsecond non-sinusoidal narrow pulses. Very low power signals are transmitted over a wider spectrum. UWB technology began with the rise of pulse communication technology in the 1960s, and is mainly used in military radar, positioning and communication systems with low interception rate/low detection rate. In February 2002, the US Federal Communications Commission issued preliminary regulations on the use of spectrum and power for civil UWB equipment. In this regulation, UWB systems are referred to as UWB systems at all times, including communication systems with a relative bandwidth greater than 0.2 or a bandwidth greater than 500MHz, and UWB technology is approved for use in commercial products. China has been preparing for UWB spectrum planning since 2006. After more than two years of research, China's own UWB spectrum plan was officially released on December 12, 2008, including the RF index of UWB signals, application site restrictions, and equipment approvals. Compared with other positioning technologies, uwb indoor positioning technology has the advantages of high positioning accuracy, good security, high transmission speed, large system capacity, low power consumption, and strong anti-interference ability.
UWB positioning technology features
Compared with traditional communication systems, UWB has the following technical characteristics that traditional communication systems cannot match, and its working principles are different: The realization of the system structure is relatively simple: the communication load wave used by current wireless communication technology is a continuous radio wave, and the frequency of the load wave is And the power changes within a certain range, and the state change of the load wave is used to transmit information. UWB does not use carrier waves, it transmits data signals by sending nanosecond pulses. UWB transmitters directly use pulsed small excitation antennas and do not require the upconversion required by traditional transceivers, thus eliminating the need for functional amplifiers and mixers. Therefore, the low-power uwb indoor positioning technology allows the use of very low-bandwidth transmitters. At the same time, at the receiving end, UWB receivers are also different from traditional receivers and do not require IF processing. Therefore, the realization of the UWB system structure is relatively simple.
High-speed data transmission: In civilian products, the transmission range of UWB signals is generally required to be within 1m. According to the revised channel capacity formula, the transmission speed can reach 500mbit/s. This is an ideal modulation technique for personal communications and wireless local area networks. UWB trades high-speed data transmission with a very wide frequency bandwidth and shares the frequency bands used by other wireless technologies, rather than occupying crowded frequency resources alone. In military applications, we can take advantage of huge expansion and gain to achieve long range, low intercept rate, low detection rate, high security and high-speed data transmission.
Low power consumption: UWB systems use intermittent pulses to send data. The pulse duration is very short. Generally speaking, it is between 0.20ns~1.5ns, and the duty cycle is very low. The power consumption of the system can be very low. During high-speed communication, the power consumption of the system is only hundreds to tens of mW. The power of civil UWB devices is generally about 1/100 of the power required by traditional mobile phones, and 1/20 of the power required by Bluetooth devices. Military UWB radios also have low power consumption. Therefore, UWB devices have great advantages in terms of battery life and electromagnetic radiation compared to traditional wireless devices.
High security: As a communication system, physical layer technology has natural security performance. Because the low-power high-precision uwb indoor positioning technology signal usually disperses the signal energy in a very wide frequency band, the UWB signal is equivalent to the white noise signal of the general communication system. In most cases, the power spectral density of the UWB signal is low. Due to the natural electronic noise, it is difficult to detect the pulse signal from the electronic noise. Pulse detection will be more difficult after pseudo-randomization of pulse parameters using encoding. The multipath resolution capability enforces the communication quality and data transfer rate, because most RF signals of conventional wireless communication are continuous signals, or their continuous time is much greater than the multipath communication time. Due to the short duration and low duty cycle of single-cycle pulses transmitted by UWB radios, multipath signals can be separated in time. If the multipath pulses overlap in time, the length of the multipath transmission path should be less than the product between the pulse width and the transmission speed. Since the pulsed multipath signals do not overlap in time, it is easy to separate the multipath components to fully utilize the energy of the transmitted signal. A large number of experiments show that for the multipath fading of conventional radio signals, the multipath fading of ultra-wideband radio signals is less than 5dB.
Positioning accuracy: The stamping pulse has high positioning accuracy, using ultra-wideband radio communication, positioning and communication are easy to integrate, which is difficult for conventional radio to achieve. Ultra-wideband radio has strong penetrating ability and can accurately locate indoors and underground. GPS positioning system can only work within the visual range of GPS positioning satellites. Up to centimeters, ultra-wideband radiolocators are cheaper.
Low power consumption and high precision uwb indoor positioning technology application scene positioning
According to the research report, the application of UWB positioning technology maintains a high compound annual growth rate every year. Our company is a happy technology enterprise, focusing on the research and application of UWB positioning technology. At present, it has been widely used in industrial manufacturing, chemical industry, power plants, underground construction, warehousing and logistics, public security, justice, hospitals and other fields.
