With the development of digital technology , getting pulse compression signals with direct digital synthesis has been in general use these days . it is widely used to generate pulse compression signal using dds method 随着现代数字技术的发展,直接数字波形合成( dds )的方式获得脉冲压缩信号已为现代雷达普遍采用。
This paper also discusses direct digital synthesis ( dds ) and digital signal process ( dsp ) in detail , because the application of digital technology is involved in software radio 本课题由于在软件无线电中还涉及了数字技术的应用,因此对其中的关键部分直接数字频率合成器( dds )和高速数字信号处理器( dsp )也进行了详细地讨论。
This paper based on control theory , according to the conception of phrase lock loop and direct digital synthesis , we designed the clock circuit . it realizes the amalgamation of kinds of the ways about clock , which make it has some superiority 本论文在控制理论的基础上,以锁相频率合成和直接数字频率合成作为设计思想,搭建时钟控制电路,在业界实现了多种时钟控制电路实现方法的融合与统一,具有一定的优越性和领先性。
The essential requirements for the frequency synthesizer are : 1 ) . low side band power 2 ) . high hopping speed 3 ) . short convergence time direct digital synthesis technology has the advantages of low cost , low power consumption , high frequency discrimination and short switching time 直接数字合成技术dds具有低成本、低功耗、高分辨率和快速转换时间等优点,是实现快速跳频的一个关键技术。本文讨论了如何实现高速的跳频系统。
The primary work in this dissertation : ( 1 ) the principle , design and implementation of generating lfm / nlfm signals based on direct digital synthesis ( dds ) technology have been discussed especially , the system has been implemented all by author 本文的主要工作之处在于: ( 1 )讨论了基于直接数字合成( dds )技术产生直接中频线性调频脉压信号和非线性调频脉压信号的工作原理、设计思想和工程实现方法,并独立完成了系统的工程实现。