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介绍了一种以自适应有限脉冲响应（ＦＩＲ）滤波和时域频谱估算技术为基础的新型低成本、近程定位系统。此系统可高精度地测定目标的绝对位置，并且非常适用于实时导航。此方法以信号处理技术和系统传递函数的先验知识为基础，首先测定线性传递函数的相位响应，而后利用ＦＩＲ滤波器测定系统的时间响应。ＦＩＲ滤波器通过所测相位响应与传递函数的共轭复数间的去卷积来计算时间响应，已知输入脉冲响应与ＦＩＲ滤波器输出值的相关计算可求得误差项，通过调整ＦＩＲ滤波器的系数仅误差项达到最小值即可确定系统的时间延迟值。系统仿真分析表明，其最大误差为±１６ｃｍ。
A new low cost, short range positioning system based on Adaptive Finite Impulse Response (FIR) filtering and time domain spectral estimation techniques is introduced. This system determines the absolute position of a target with high accuracy and is ideal for real-time navigation. Based on the prior knowledge of signal processing techniques and system transfer functions, this method first measures the phase response of the linear transfer function and then uses the FIR filter to measure the time response of the system. The FIR filter calculates the time response by deconvolution between the measured phase response and the conjugate complex of the transfer function. It is known that the error term can be obtained by calculating the correlation between the input impulse response and the FIR filter output value. By adjusting the FIR filter Only the error term reaches the minimum value to determine the system’s time delay value. System simulation analysis shows that the maximum error is ± 16cm.