一种新的相位编码幅值调节联合变换相关器(英文)

A Novel Phase-encoded Amplitude-modulated Joint Transform Correlator

给出了一种对经典联合变换相关器进行相位编码和幅值调节的新方法 ,使联合变换相关器具有优化的相关输出信号和很强的抗干扰能力 .在相位编码幅值调节联合变换相关器中 ,输入的待识别信号首先通过相位模板进行相位编码 ,然后对联合功率谱进行幅值调节滤波 .在进行幅值调节滤波时采用了增强型幅值调节滤波器 ,其调节因子可根据输信号的噪音干扰情况进行调节变化 .相位编码幅值调节有效地祛除了多目标识别联合变换相关器的冗余信号 ,可广泛的应用于多目标识别 .

A novel phase-encoded and amplitude-modulated technique applied to a classical joint transform correlator(JTC) is proposed, which yields superior output correlation signals and better noise robustness than a classical JTC. In the proposed phase-encoded amplitude-modulated JTC(PAJTC) technique, firstly, the input targets are encoded with an application of a phase mask, and then the joint power spectrum (JPS) is multiplied by an amplitude-modulated filter (AMF) of the reference object before the inverse Fourier transforming. An enhanced amplitude-modulated filter, in which the modulation factor varies according to the noise presented in the input scenes, is used in the PAJTC technique. The PAJTC technique eliminates extraneous signals especially for the JTC with multiple input targets. An optoelectronic implementation schematic diagram for the PAJTC technique and computer simulations of the performances of the classical JTC and the PAJTC for comparison are presented.