摘要
针对窄带信号,通过构造互谱时间序列,在互谱域建立了平稳时间序列时延估计的最小方差无畸变响应(MVDR)滤波器模型;利用分段近似处理,类比空间MVDR自适应算法,给出了其具体算法(CSMVDR);进行了数值仿真实验研究和海上实验数据处理。数值仿真与实验数据处理结果初步验证了CSMVDR时延估计对于舰船辐射噪声的适用性,CSMVDR时延估计有比相关检测更好的时延估计性能,能够提高信噪比增益和时延估计精度。
For the narrow band signal, the MVDR filter model of stationary time series in cross spectral domain is established to estimate time delay. In analogy to spatial MVDR adaptive algorithm, the algorithm （CSMVDR） is presented by subsection approximation processing. The numerical simulation and experimental data processing were carried out. The results show that CSMVDR method can apply for time delay estimation of ship radiated noise and CSMVDR time delay estimation is better than correlation detection. Moreover, the signal to noise ratio and precision of time delay estimation can be improved.
出处
《应用声学》
CSCD
北大核心
2015年第4期291-296,共6页
Journal of Applied Acoustics
基金
声场声信息国家重点实验室基金(SKLA201406)
关键词
时延估计
MVDR滤波器
互谱域
Time delay estimation, MVDR filter, Cross spectral domain
