基于单比特量化的单频信号时延估计算法

Time-delay estimation of sinusoidal signals based on one-bit quantification

提出了一种基于单比特量化的单频信号自适应时延估计算法,采用该算法在保持信号频谱特性不发生变化的基础上,极大地去除信号冗余量,对简化后的信号框架采用包络检测,估计时延。对接收信号进行单比特量化能够最大限度地降低数据量,同时量化结果又进一步简化了单频信号滤波器的输入响应函数结构,自适应算法则保证了时延估计的高分辨率。通过仿真实验表明,该算法在不造成频偏和频率衰减的同时,又很好保证了时延估计精度。最后利用湖上实验验证了算法的有效性和可靠性。

A new method to estimate time-delay of sinusoidal signals is proposed in this paper. In the described method, the sinusoidal signals are one-bit quantified on the basis of keeping the signal＇s amplitude-frequency characteristics. In this way the amount of data is reduced maximally. The quantified result also simplifies the response function of the Notch filter. The simulation shows that the algorithm guarantees the high accuracy of time delay estimation without frequency bias or reduction. And, lake-trial data are provided to demonstrate the effectiveness and precision of the proposed algorithm.