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http://dx.doi.org/10.5302/J.ICROS.2015.14.0140

Analysis of CRLB Performances with CAF under Multiple Emitters  

Lee, Young-kyu (Division of Physical Metrology, Korea Research Institute of Science and Technology)
Yang, Sung-hoon (Division of Physical Metrology, Korea Research Institute of Science and Technology)
Lee, Chang-bok (Division of Physical Metrology, Korea Research Institute of Science and Technology)
Park, Young-Mi (The 2nd R&D Institute, Agency for Defense Development)
Lee, Moon-Seok (Electronic Warfare R&D Lab., LIGNex1)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.21, no.6, 2015 , pp. 589-594 More about this Journal
Abstract
In this paper, we described the Cramer-Rao Lower Bound (CLRB) performances of Time Difference of Arrival (TDOA) and Frequency Difference of Arrival (FDOA) methods when there are multiple emitters. The TDOA and FDOA values between two receivers can be simultaneously estimated by using the so-called Complex Ambiguity Function (CAF). In the case of multiple emitters, there exist Inter Symbol Interferences (ISIs) in the measurement data. Therefore, it is required to reduce the effect of ISI and provide a performance evaluation method of TDOA and FDOA estimations. In order to eliminate the ISIs, using of a filter bank before calculating CAF is proposed when the carrier frequencies of the emitters are different to one another. Angle of Arrival (AOA) or Received Signal Strength (RSS) methods before calculating CAF were proposed to reduce the ISIs when the carrier frequencies are the same. In order to evaluate the CRLB of TDOA and FDOA estimations, we employed the conditional probability distribution method and described the numerical comparison results.
Keywords
CAF; TDOA; FDOA; ISI; CRLB;
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Times Cited By KSCI : 1  (Citation Analysis)
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