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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2014, Vol. 15 Issue (2): 130-137    DOI: 10.1631/jzus.A1300263
Mechanics     
Target localization based on joint measurement of amplitude and frequency in a LOFAR field
Lin-wei Tao, Ying-min Wang
School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China
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Abstract  To estimate the motion parameters of a moving target before its passing by the closest point of approach (CPA) point in a low frequency analyzing and recording (LOFAR) field, an error-free theoretical method based on the joint measurement of target radiated noise’s amplitude and frequency was presented. First, the error-free theoretical equations for target characteristic frequency, absolute velocity, the CPA, and amplitude of the radiation noise were derived by three equal interval measured values of the target amplitude and frequency. Then, the method to improve the calculation accuracy was given. Finally, the simulation and experiments were conducted in the air and showed the correctness of this method. By using one single piece of LOFAR, this method can calculate four target parameters and the relative error of each estimated parameter is less than 10%.

Key words： Low frequency analyzing and recording (LOFAR)      Closest point of approach (CPA)      Doppler frequency shift      Transmission loss     
Received: 07 August 2013      Published: 27 January 2014
CLC:  TB52  
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Lin-wei Tao
Ying-min Wang
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Lin-wei Tao, Ying-min Wang. Target localization based on joint measurement of amplitude and frequency in a LOFAR field. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2014, 15(2): 130-137.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A1300263     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2014/V15/I2/130

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