摘要
结合GCC-PHAT与SRP搜索的算法被广泛应用于声源定位系统,但其定位结果随信噪比降低而恶化严重,且难以估计窄带声源。针对这些问题,提出一种用于近场模型的改进算法。首先计算阵列信号求和功率谱的峰均比,再经对数变换和设置噪声抑制阈值等步骤,得到反映频点信噪比的加权因子,将其应用在GCC-PHAT中,并进一步优化SRP搜索策略。大量仿真结果表明:改进的算法具有强的抗噪能力,且对宽带和窄带声源信号均有良好的估计效果,很适合实时处理。
GCC-PHAT combined with SRP searching algorithm had proved to be ineffective on narrowband sound source and the localization results deteriorated severely with the decreasing of SNR. To solve these problems,proposed an improved algorithm for near field model which introduced a weighting factor by calculating the PAPR of received signals in the frequency domain, and then make logarithmic transformation to compress the dynamic range,as well as the establishment of a threshold to suppress noise,etc. ,and further optimized the sound source position searching strategy. A lot of simulation results showed that the improved algorithm has strong ability to resist noise and have good estimation effects on both broadband and narrowband sound sources,it＇s very suitable for real-time processing.
作者
梁音
张华
陈利民
龙学焜
王伟
肖中奇
LIANG Yina b ZHANG Hua CHEN Limina(a. School of Mechatronics Engineering, Nanchang University, Nanchang, Jiangxi 330031, China b. School of Information Engineering,Nanchang University,Nanchang,Jiangxi 330031 ,Chin)
出处
《南昌大学学报（理科版）》
CAS
北大核心
2016年第6期557-562,共6页
Journal of Nanchang University(Natural Science)
基金
国家自然科学基金资助项目(51165033)
江西省自然科学基金资助项目(20151BAB207052)
江西省科技支撑计划项目(20142BBE50035)
关键词
声源定位
近场
时延估计
可控功率响应
对数峰均比
宽带-窄带
acoustic source localization
near-field
Time Delay Estimation （TDE）
Steered Response Power（SRP）
logarithmic PAPR
broadband-narrowband
