As a key technology in digital quadrature demodulation system, the direct IF sampling filter with sharp cutting-off transitionband can improve the performance of demodulation system.
中频采样是数字正交鉴相系统中的一项关键技术，具有锐截止特性的中频采样滤波器可以改善鉴相系统的性能。
2
The energy band structures were studied with the method of EHMO/CO for transition metal phthalocyanines.
用EHMO/CO方法对过渡金属酞菁化合物的能带结构进行了研究。
3
The transition quadrupole moments extracted from the measured lifetimes demonstrate that change in nuclear shape occurs in the band crossing region.