Abstract
Network Scalability is an important step in the development of UWB indoor localization system. Owing to its fine resolution and robustness in cluttered environments, UWB signals are well suited for localization purposes as they allow high ranging accuracy. TDOA algorithm based on UWB indoor localization system can achieve high-precision positioning but it requires each anchor clock synchronization. This paper mainly studied the optional of master anchor based on TDOA algorithm. It becomes an effective way to adapt to the complex communication environment. Then realized the network scalability in multiple anchor conditions and finally evaluated the performance of master anchor optional algorithm on a realistic indoor scenario. A localization error analysis on UWB indoor positioning system was performed. The smallest TDOA measurement error is 15.127 cm and the worst error is 27.230 cm, as was shown by the test results.
Highlights
Indoor localizat ion has been an area of intensive investigation since it has great demands in many applications, such as localization-based billing in store or market, tools and equipment positioning in factory [1]
There are several different radio technologies such as WiFi, Bluetooth, Zig Bee or Ultra -wideband (UW B) with different levels of accuracy, range and co mp lexity used for indoor localizat ion sys tem and localization systems based on RSSI estimation are not very suitable for indoor location because RSSI is very sensitive to mult ipath and non-line-of sight (NLOS) situations and their accuracy is usually within a few meters [2]
In Sect ion 3, we describe the principle of network scalability in UW B indoor localization system and put forward the Master anchor optional algorith m
Summary
Indoor localizat ion has been an area of intensive investigation since it has great demands in many applications, such as localization-based billing in store or market, tools and equipment positioning in factory [1]. There are several different radio technologies such as WiFi, Bluetooth, Zig Bee or Ultra -wideband (UW B) with different levels of accuracy, range and co mp lexity used for indoor localizat ion sys tem and localization systems based on RSSI estimation are not very suitable for indoor location because RSSI is very sensitive to mult ipath and non-line-of sight (NLOS) situations and their accuracy is usually within a few meters [2] In this wireless positioning technologies, there is nothing comparable to UWB (Ultra wideband) wireless positioning technology to achieve a series of requirements of future wireless positioning.
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