摘要
提出了利用多元阵信号相位匹配原理的信号方向估计及信号估计的最小二乘法的求解方法,该方法不仅可减小接收通道的相幅度一致性对信号估计的影响,同时也可以消除利用三元阵或叫元阵的信号相位匹配原理时产生的估计信号奇异值.利用真实舰船噪声的线谱可实现高精度目标定向,然后根据确定方向实现目标宽带信号估计.仿真结果表明,多子阵的信号相位匹配法的噪声抑制性能明显优于阵元域的噪声抑制性能.
The least squares method of signal and direction of arrival estimation based on beam space signal-phase-matching principle is proposed by using multi-senor arrays to reduce the effect of the difference between phase and amplitude of receive channel on estimation of performance and to remove the singularity which occurs when the signal-phase-principle of three or four sensor arrays is used. High-precision estimation of soure location can be achieved using this principle and the line spectrum of ship radiated noise, and the broadband signal parameters can then be estimated from the estimated location of source. Simulation results indicate that the processing gain of the proposed method is greater than that of the sensor space method.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
2003年第4期368-372,共5页
Journal of Harbin Engineering University
基金
国家自然科学基金(60272077)
航空科学基金(02F53030)
陕西省科学基金(2002F17)资助项目.
关键词
信号相位匹配原理
最小二乘法
多子阵
信号估计
signal-phase-matching principle
least squares method
multi-subarray
signal estimation
