In Time of arrival (TOA) based indoor human tracking system, the human body mounted with the target sensor can cause non-line of sight (NLOS) scenario and result in significant ranging error. However, the previous stu...
详细信息
In Time of arrival (TOA) based indoor human tracking system, the human body mounted with the target sensor can cause non-line of sight (NLOS) scenario and result in significant ranging error. However, the previous studies on the behavior of indoor TOA ranging did not take the effects of human body into account. In this paper, we introduce a statistical TOA ranging error model for body mounted sensors based on the measurements in a typical office building. This model separates the ranging error into multipath error cased multipath combination and undetectable direct path (UDP) error derives from the body-caused NLOS. Both multipath error and UDP error are modeled as a Gaussian variable. The distribution of multipath error is relative to the bandwidth of the system and the distribution of UDP error is relative to the angle between the face direction and the direction of TX-RX, SNR and bandwidth of the system, clearly shows the effects of human body on TOA ranging.
In direct sequence spread spectrum (DSSS) communications, the frequency band of the signal is vulnerable to single narrow-band interference, multiple narrowband interference, wideband interference and other interferen...
详细信息
An analysis for individual behaviour in group formation is shown in this *** find that individuals adjust their states by means of pulse during the group *** explanation for this phenomenon is proposed by studying the...
详细信息
Analyze issues of training level, raise direction and teaching mode of current e-commerce specialty construction in our country. According to the actual situation of e-commerce education, put forward three basic ideas...
详细信息
To solve the problems of policy compatibility which are caused by the multiple heterogeneous policies that were used in a single virtual organization, a new policy mapping model is proposed. The model mapped the local...
详细信息
A mine-water level sensor system into the utility model of infrared control modules, and gives the design of hardware and software modules. The program has a simple structure, high precision, good linearity, etc., for...
详细信息
The computer algorithm and its improvement of traditional forest fire model based on cellular automata are discussed in this paper. By optimizing algorithm of the model, dynamic updating the tree cluster, introducing ...
详细信息
FastSLAM is a framework which solves the problem of simultaneous localization and mapping using a Rao-Blackwellized particle filter. Conventional FastSLAM is known to degenerate over time in terms of accuracy due to t...
详细信息
The apparel products with high thermal quality have become increasingly attractive to clothing industry as it can provide people comfort wearing feeling thus improve the quality of life. In this paper, a group of inte...
详细信息
With the globalization of manufacture and the network-based manufacture, the traditional centralized organization mode of manufacture will be replaced by distributed network-collaborative organization mode which is pr...
详细信息
暂无评论