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http://dx.doi.org/10.12673/jant.2017.21.2.163

Pulse Position Determination using Adaptive Threshold Detector  

Chagn, Jae-won (Avionics Research Team, Korea Aerospace Research Institude)
Lee, Sang Jeong (Department of Electronics Engineering, hungnam Natioanl University)
Publication Information
Journal of Advanced Navigation Technology / v.21, no.2, 2017 , pp. 163-170 More about this Journal
Abstract
MLAT which is an independent cooperative surveillance system is applied to increase the positon resoultin of secondary survelliance radar. MLAT uses the hyperboic or hyperboloid position mesurement algorithm. Central processing unit of MLAT calculates target position using time difference of arrival (TDOA) which can be solved from time of arrival (TOA) information of each receivers (at least 4 receivers). To increase position resolution of MLAT which use TDOA, TOA which is transfer time from tranmitter to receiver shold be calculated with precision time resolution in receiver. This paper explained the MLAT system briefly and explained ATD which is one of means of calcuating pulse position. ATD is applied to solve the deviation of pulse position due to different amplitude of signals in mulitiple receivers. In this paper, to analysis the performance of ATD, the simulation result of LAS and CDS was compared with the simulation result of basic threshold method.
Keywords
Multilateration; Time difference of arrival; Time of arrival; Adaptive threshold detector; Level adjuster system; Constant-fraction discriminator system;
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