A New method of Doppler Shift Passive Localization for Moving Target Based on Multi-nodes

摘要

Real-time localization of underwater moving target is an interesting topic in passive sonar detection in underwater sensor networks. Classically, match field processing or Target Moving Analysis (TMA) is used to do this task. As sensor network develops, localization methodology based on multi-nodes is becoming a research focus. Because the underwater sensor networks usually have a narrow communication bandwidth, localization algorithms that require less communication is needed. This paper proposes a moving target status estimation algorithm based on the fact that signals received by nodes with different positions take on different Doppler shift. Theoretical analysis and numerical simulation results indicate that this algorithm can obtain the position, velocity and line spectrum of the moving target, and is insensitive to acceleration and line spectrum shift. In addition, this algorithm only needs to know the line spectrum of every sensor node received, there is no need to transmit all the original sampling data, so the communication bandwidth required is not so much and it is suitable for underwater sensor network usage.