A Time Difference of Arrival Estimation with Integration of Generalized Cross Correlation Samples for Continuous Wave Signals on Passive Positioning Systems
Hüseyin Burak Önen, Mesut Kartal · 2021 13th International Conference on Electrical and Electronics Engineering (ELECO) · 2021
Generalized Cross Correlation method is commonly used for estimation of a signal Time Difference of Arrival. The method is based on applying cross correlation between signals at reference receiver and signals at principal receiver. This commonly used method may not work well under low signal-to-noise ratio conditions observed in passive positioning or ranging systems, such as navigation systems using opportunity signals or passive radars. This paper presents an enhanced technique for Generalized Cross Correlation method applied on Arrival Time Difference estimation by dividing the received signals into small time windows and then integrating the correlation results for each sample. The Pulse Integration method in the radar literature is the inspiration of this work. More accurate upshots are observed in this work even in low signal to noise ratio conditions.