基于动态规划的时延估计（TDE）技术分析时变时延
Dynamic Programming based Time-Delay Estimation (TDE) Technique for Analysis of Time-varying Time-delay
摘要：
提出了一种基于动态规划的时延估计方法，用于测量信号间的时变时延。基于动态规划的TDE技术提供比先前已知的TDE技术（即基于时滞互相关或小波分析的那些技术）高5至10倍的频率响应。利用仿真数据信号研究了频谱、信噪比和时延幅值对时延估计技术响应（传递函数）的影响。该技术的传递函数随着信号中噪声的增加而减小;然而，它与信号频谱形状无关。基于动态规划的TDE技术应用于BES诊断数据，测量了极向速度起伏，观测到了理论预测的高温托卡马克等离子体纬向流。
英文摘要：
A new time-delay estimation (TDE) technique based on dynamic programming is developed, to measures the time-varying time-delay between two signals. Dynamic programming based TDE technique provides a frequency response 5 to 10 times higher than previously known TDE techniques, namely those based on time-lag cross-correlation or wavelet analysis. Effects of frequency spectrum, signal-to-noise ratio and amplitude of time-delay on response (represented as transfer function) of TDE technique is studied using simulated data signals. Transfer function for the technique decreases with increase in noise in signal; however it is independent of signal spectrum shape. Dynamic programming based TDE technique is applied to the Beam-Emission-Spectroscopy (BES) diagnostic data to measure poloidal velocity fluctuations, which led to the observation of theoretically predicted zonal flows in high-temperature tokamak plasmas.
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