• The proposed PSVC-MB filter significantly improves tracking accuracy for maritime dim targets under low signal-to-clutter ratios.
• Replacing resampling with particle position scaling effectively mitigates particle impoverishment and preserves particle diversity.
• Velocity correction using pseudo point measurements from multi-frame information reduces velocity uncertainty and prevents tracking loss.
• Simulation results demonstrate the superior performance of PSVC-MB compared to the standard SMC-MB-TBD method at various low SCRs.