A TOA-Only Method for PRI-Pattern Recovery in Multi-Emitter Interleaved Scenarios

This letter proposes an exclusive pulse clique (EPC)-based method for PRI-pattern recovery in multi emitter interleaved scenarios using only TOA information. By exploiting a prior lower bound on PRI, the method constructs exclusive pulse cliques, in which any two pulses cannot originate from the same emitter. Based on this structure, candidate PRI states are first identified, after which local PRI state transition relations are generated and fused to recover the complete PRI-pattern. Simulation results show that the proposed method remains effective in a three-emitter scenario with overlapping PRI ranges and a total of 22 PRI states, even when the missing pulse ratio reaches 40% or the interferential pulse ratio reaches 20%.