New method for TDOA sorting and pairing using TDOAs' correlation
Ding Chi-biao · Journal of Xidian University · 2011
For eliminating location ambiguity of three familiar types of high PRF(pulse repetition frequency) signal in the TDOA(time difference of arrival) passive location system,a new method for TDOA sorting and pairing is put forward.The new method defines the correlation coefficient which describes the correlation between a pair of TDOAs.Firstly,two TDOA sequences of a certain target are sorted by calculating the correlation coefficient,so TDOA sequences' sorting and pairing is accomplished simultaneously,and then the correlation coefficient matrix of single target's pairing TDOA sequences is analyzed,and false pairs of TDOAs are eliminated according to the pairing representation of the high PRF signal.Simulation results show that the new method is able to reduce the number of false pairs of TDOAs,so it can reduce false locations and improve location ambiguity effectively.