Track‐Before‐Resolving: Doppler ambiguity resolution at low SNR

Abstract

This study introduces a new scheme for resolving the ambiguity in a pulse‐Doppler radar. While ambiguity resolution is typically performed before tracking, the proposed approach, Track‐Before‐Resolving, is resolving ambiguity utilising tracking filters. A specific Doppler ambiguity resolution algorithm is provided for demonstrating that the Track‐Before‐Resolving method is useful. In order to resolve the ambiguity, which is equivalent to finding the ambiguity number, this algorithm investigates the maximum probability calculated in the multiple model estimation, each with a tracking filter of a different ambiguity number. Simulation shows that the proposed algorithm performs effectively, even at low SNR.

Enhanced Multi-Target Tracking with Combination of Position, Power and Ambiguous Doppler Measurements

“…Reference [12] discussed a target tracking method in ambiguous Doppler situations using Gaussian Mixture. A Track-Before-Resolving approach for resolving the ambiguity in Doppler measurements was proposed in [13]. This new method considers the maximum probability computed in the multiple model estimation.…”