TOA estimation for unkonwn signal under low SNR condition based on accumulation
Jia Xu, L.X. Ren, Zhihong Jiang, Erke Mao · 2015
This paper presents a novel low complexity TOA estimation method for unknown signal under low SNR condition, especially for inner-pulse modulated signal. In this new method, received signal is firstly pre-processed by multiplying its delayed conjugation to reduce intra-pulse modulation. Then a refined coherent accumulation is applied to achieve a precise TOA estimation result. Simulation results show that this new method can achieve an accurate TOA estimation for unknown signal under low SNR condition.