摘要
本文研究仅能量受限下有源声呐检测最佳波形。证明当混响、介质传播和目标散射过程的散射函数为对称函数时,相关接收机的最佳参考波形和最佳检测波形相同,最佳检测波形为一非线性齐次积分方程的解。如果进一步假定散射函数与时延无关,文中证明了最佳检测彼形仅取决于它的幅频特性而其相频特性的选择可自由。本文所得的结论把匹配滤波器的理论推广到存在混响和回波畸变的信道。
In this paper optimum signals with an energy constraint are studied for active sonar detection. It is proved that the optimum signal is the solution of a homogeneous nonlinear integral equation and the optimum reference function of the correlation receiver is the same as this signal, if the target and the medium scattering functions and the reverberation distribution are symmetric. For the channel of which scattering function is symmetric and independent of delay, it is further shown that only the frequency-dependent magnitude function of optimum signal is required to consider and we have a free choice of its frequency-dependent phase function.
出处
《声学学报》
EI
CSCD
北大核心
1989年第1期45-50,共6页
Acta Acustica
