Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (12): 2797-2800.doi: 10.3969/j.issn.1001-506X.2009.12.01

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Analysis of precision of multi-satellite joint location based on TDOA/FDOA

ZHU Wei-qiang1， HUANG Pei-kang2， SHU Feng3， MA Qin1   

  1. 1. Nanjing Electronic Equipment Inst., Nanjing 210007, China; 2. Science Technology Community, Defense Technology Academy, China Aerospace Science and Industry Corporation, Beijing 100854, China; 3. Dept. of Communication Engineering, Coll. of Electronic and Optical Technology,
    Nanjing Univ. of Science and Technology, Nanjing 210094, China
  • Online:2009-12-24 Published:2010-01-03

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Abstract:

CramérRao lower bound (CRLB) is derived for multisatellite passive location based on time difference of arrival (TDOA) and frequency difference of arrival (FDOA) and its necessary and sufficient conditions are given. These conditions can be used to design an optimal shape of satellite array. Compared with geometric dilution of precision (GDOP), CRLB can better evaluate the performance of joint passive location. Both theory analysis and simulation prove the fact that the joint TDOA/FDOA location performs better than any one of  TDOA and FDOA.

Key words: time difference of arrival, frequency difference of arrival, location, CramérRao lower bound

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