| 1. | Secondly , another important technique , multi - rate signal processing for software receivers , is investigated
其次，研究了软件无线电系统中十分重要的多速率处理问题。 |
| 2. | The merit of this algorithm is that higher rate estimated signals can be obtained with different lower rate signals
采用该算法的优点是可以采用不同的低速率传感器获得较高速率的信号估计。 |
| 3. | This paper investigates the problems about the base - band signal shaping and the multi - rate signal processing of the radio - frequency signal
本文对基带信号的成形和射频信号的多速率处理进行了研究。 |
| 4. | For medium or long distance underwater acoustic communication , the narrow bandwidth and low carrier frequency only supports low bit - rate signal transmission
对于中、远距离的水声通信而言，水声信道的窄带宽、低载波频率特性只能支持较低的信息传输速率。 |
| 5. | In chapter 2 , it introduces the basic theory of the software radio , which includes the architecture of software radio , the sampling theory and multi - rate signal process
第二章介绍了软件无线电的基本架构、软件无线电中的信号采样理论及多速率信号处理技术。 |
| 6. | So in chapter 2 , the thesis introduces the related theory of software radio , such as the sampling theory , multi - rate signal processing , and high efficient digital filter
第二章将对包括信号采样理论、多速率信号处理以及高效数字滤波器等的相关理论进行说明。 |
| 7. | Finally , two important theories of the multi - rate signal processing , interpolation and decimation , are discussed . the paper also gives their computer simulation results and fpga implementation
最后讨论了多速率信号处理中两种重要的信号处理? ?内插和抽取，对它们的实现方法进行了软件仿真，同时给出了它们的fpga实现。 |
| 8. | Then ， we complete the intermediate frequency digital acquisition and tracking circuits according to the band pass sample theory , digital signal processing theory , multiple rate signal processing theory and digital filter theory
接着，基于带通信号采样理论，数字信号处理理论，多速率信号变换理论，数字滤波器理论，设计出了中频数字捕获与跟踪电路。 |
| 9. | From the results of linear analysis , it can be found that most of the people ' s heart beat rate centralize at 70 - 80 times / min . it ' s power spectrum is a continuous spectrum with a pinnacle , this shows that the heart beat rate signal obeys certain dynamical law
文中对15例心率信号进行了统计分析和简单的时频域分析，发现大部分人的平均心率集中在70 - 80次分，其功率若是一有尖峰的连续谱，说明心率信号不是简单的噪声，它服从一定的动力学规律。 |
| 10. | 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。 |
