Airborne multistatic synthetic aperture radar (SAR) shows various advantages such as high flexibility and target observation from different perspectives regarding localization. However, due to the separation of transm...
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ISBN:
(纸本)9798350360332;9798350360325
Airborne multistatic synthetic aperture radar (SAR) shows various advantages such as high flexibility and target observation from different perspectives regarding localization. However, due to the separation of transmitters and receivers, the time-frequency synchronization error is induced and the traditional Range-Doppler (R-D) localization method is unreliable because of challenges in Doppler centroid estimation. Furthermore, there is a position error in the position of the unmanned aerial vehicle (UAV) as a high-maneuvering platform. This paper proposes a novel localization method for airborne multistatic SAR based on time difference of arrival (TDOA). This method only uses range information extracted from received signals without Doppler centroid estimation for TDOA localization equation construction. Then the localization equation is solved by the taylor algorithm for the target location, which is of good robustness to the time-frequency synchronization error and the UAV position error. Numerical simulations validate the effectiveness of this method.
This paper introduces the taylor algorithm and Chan algorithm based on the time difference of arrival (TDOA) and the TDOA/AOA hybrid positioning algorithm. In the simulation experiment, the positioning root-mean-squar...
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ISBN:
(纸本)9781728101200
This paper introduces the taylor algorithm and Chan algorithm based on the time difference of arrival (TDOA) and the TDOA/AOA hybrid positioning algorithm. In the simulation experiment, the positioning root-mean-square error is used as the evaluation index, and simulation analysis of Chan algorithm, taylor algorithm and TDOA/AOA hybrid algorithm arc implemented under different conditions respectively. The results indicate that the positioning root-mean-square error of TDOA/AOA hybrid algorithm is smaller than that of the Chan algorithm and the taylor algorithm, that is, the hybrid positioning algorithm has better positioning performance.
The wireless sensor network(WSN)has a wide range of application prospects and can be used in military,environment,sanitation,space exploration and other commercial *** for most applications,data without location infor...
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The wireless sensor network(WSN)has a wide range of application prospects and can be used in military,environment,sanitation,space exploration and other commercial *** for most applications,data without location information is not effective. Localization has become one of the indispensable supporting techniques in WSN,and has attracted worldwide *** range-based localization algorithms were compared in this *** of high positioning accuracy of TDOA algorithm and the requirement for initial values in taylor Series Expansion,we proposed LS-taylor algorithm and Chan-taylor algorithm in which an available solution of initial value can be *** simulation indicates that those algorithms have a high precision as well as the taylor *** proposed algorithms can effectively reduce repeating times and lower power loss of nodes.
Using the life detector to identify the human's life characteristic and locate the target position rapidly and accurately are to realize the fundamental guarantee of the search and rescue personnel quickly and eff...
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Using the life detector to identify the human's life characteristic and locate the target position rapidly and accurately are to realize the fundamental guarantee of the search and rescue personnel quickly and effectively at the scene of the fire,earthquake,*** paper mainly aimed at how to use taylor algorithm to achieve the goal of positioning after detected the life signal,we put forward a new algorithm N-taylor,which improved in selecting the initial value of taylor algorithm and decreasing the data error of *** final results of Ntaylor are obtained by getting the weighted average between positioning initial and taylor locating *** the large error of NLOS,we carried on three-dimensional simulation experiment,which proved that the N-taylor is superior to the 1-taylor,Chan-taylor and taylor in the aspects of positioning accuracy and the number of iterations.
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