摘要
基于麦克风阵列的波达方向估计在野外传感网络的理论研究和工程实践领域有着重要的战略意义,多通道麦克风阵列在进行声源定向时往往因为各个通道存在幅度和相位的不一致而产生定向误差。针对这一问题,提出了一种自适应的麦克风阵列通道不一致校正方法。该方法基于子空间分解原理构造了信号谱空间的目标代价函数,结合模拟退火算法模型,通过对代价函数最小化的方法,求得阵列的校正矩阵。通过计算机使用上述方法对8元麦克风阵列进行仿真模拟,并采用4元麦克风阵列进行实际测试,仿真及实际测试结果验证了该校正方法的可行性。
The direction of arrival estimation,which is based on microphone arrays,has crucial strategic significance in the field of field sensor network theoretical research and engineering practice.Multichannel microphone arrays often produce orientation errors due to the inconsistencies in the amplitude and phase of each channel when sound sources are oriented.In response to this problem,this study proposes an adaptive correction method for channel inconsistencies in a microphone array.This method constructs the objective cost function of the signal spectrum space based on the principle of subspace decomposition.Furthermore,it combines the simulated annealing algorithm model to obtain the correction matrix of the array by minimizing the cost function.Finally,the 8-element microphone array is simulated by the computer using the above method,and the 4-element microphone array is used for the actual test.The simulation and actual test results confirm the feasibility of the correction method.
作者
宋嘉宇
王超懿
刘华巍
李宝清
袁晓兵
Song Jiayu;Wang Chaoyi;Liu Huawei;Li Baoqing;Yuan Xiaobing(Key Laboratory of Microsystem Technology,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 201800,China;Chinese Academy of Sciences University,Beijing 100049,China;College of Information,ShanghaiTech University,Shanghai 201210,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2022年第17期124-131,共8页
Laser & Optoelectronics Progress
关键词
光信号处理
麦克风阵列
波达方向估计
频谱分析
模拟退火
自适应校正
signal processing
microphone array
direction of arrival estimation
spectrum analysis
simulated annealing
adaptive correction
