基于并行相关的实时时差估计器设计与实现

摘要

Starting from the principle of cross-correlation, we propose a parallel architecture of correlation, then design and implement a high efficient TDOA estimator based on this architecture. Compared to the traditional TDOA estimator using correlation in frequency domain, this TDOA estimator, which meets the demand of high precision and real-time estimation of TDOA, improves the operation efficiency, and greatly reduces the operation cycle. Meanwhile, it has a simple structure, low cost of hardware resources, and is easy to implement. Actual test results support these conclusions.%从相关时差估计的基本原理出发,提出了一种并行时域相关结构,基于这种并行结构设计实现了一种简单高效的时差估计器.与传统频域相关时差估计器相比,这种时差估计器的主要优点是提高了运算效率,运算周期大为缩短,可以满足实时高精度时差估计的需求,同时结构简单,硬件资源开销小,易于设计实现.实际测试结果验证了上述结论.