band pass signal meaning in Chinese

带通信号

First , how to conduct sample and quantification of continuous time signal which is prior condition of sdr is explored in detail , and the comparison and analysis of some sample modes are given in which band pass signal sampling theorem is most important . second , multi - sample rate signal processing which is an important basis of sdr is studied . emphasis are put on decimation and interpolation those are the most fundamental process and the realization of decimation and interpolation filter
在基于中频采样的软件无线电结构框架下，首先详细探讨了软件无线电的前提条件，即如何对连续时间信号进行采样量化，比较分析了几种采样的方式，其中最为重要的是带通信号采样定理；然后探讨了软件无线电的一个重要基础，即多采样率信号处理，重点讨论其最基本的两个过程抽取和内插以及抽取器和内插器的实现；接着介绍了结构简单、适用于一级抽取的cic滤波器和适用于做2倍抽取的半带滤波器；再次论文在总结了传统的调制解调基础上，结合软件无线电器件的特点，系统的探讨并实现了基于正交思想的am 、 fm 、 ask 、 fsk 、 bpsk 、 qpsk的正交调制解调算法。