digital down convert meaning in Chinese
数字下变频
Examples
- It is very difficult to realize digital rf , but we can realize digital if . digital if mainly include : digital up convert ( duc ^ digital down convert ( ddc ) , a / tk d / a and number control oscillator ( nco )
目前实现射频数字化还有一定的困难，但可以实现中频部分数字化。数字中频处理主要包括数字上变频、数字下变频、 a d与d a的处理以及数控振荡器等。 - This system is based on two altera ’ s statixii series fpga chips ep2s180f1020c5 , and the tunner dtt7579 and the chip ad9433 , together composed the main hardware platform . the hardware description system running on the fpga is the core of digital down converted sysgtem , synchronization system , estimation and equalization of channel system , 3780 - point fft ofdm demodulation system , frequency equalization system and ldpc decoding
以两片altera公司的stratixii系列ep2s180f1020c5级联为基础构建了系统主硬件处理平台,结合汤姆逊公司的调谐器dtt7579以及ad9433组成了系统的硬件构架fpga可描述硬件系统的核心任务包括数字下变频,同步和信道均衡与估计, 3780点fftofdm解调,频域均衡, ldpc解码。 - Digital down converting is one of the key technologies of software radio . it can improve the efficiency and reliability of communications . lt is also important to realize software radio receivers . the paper focuses on the technologies involved in digital down converting , such as integer sampling - rate conversion , non - integer sampling - rate conversion and carrier frequency offset estimation algorithm . on the base of these , the paper analyzes applications of digital down converting in the hsp50214b programmable downconverter . the hardware and sofeware of the application of digital down converting are also introduced
数字下变频技术是软件无线电中的关键技术之一。该技术不仅有助于提高通信的有效性和可靠性，还对实现真正的软件无线电台有着重要的意义。本文对数字下变频所涉及整数倍采样率转换、非整数倍采样率转换和载波初始频差估计校正作了较深入的研究，并提出了一些实用高效的实现结构和算法。