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一个复数网络可以认为是由两个实网络所组成,它们分别传递复数信号的实部和虚部。若网络的阻抗是“一实”的,则能用波数字滤波器来实现。本文介绍用波数字格型滤波器来实现复数滤波器、其输出信号的虚部和实部之间满足希尔伯特(Hilbert)变换关系。由于波数字格型滤波器的衰减响应满足一定的对称性时,可使实现硬件减少,因此它为希尔伯特变换器的一种新的实现方法。
A complex network can be thought of as consisting of two real networks that deliver the real and imaginary parts of complex signals, respectively. If the network impedance is “real”, you can use wave digital filter to achieve. This paper introduces the implementation of complex filter with wave digital lattice filter. The Hilbert transform relationship between the imaginary part and the real part of output signal is fulfilled. It is a new method to realize Hilbert transformer because the attenuation of the wave number lattice filter satisfies a certain symmetry and can reduce the hardware.