Then, a solution based on Digital Up Converter ( DUC) was proposed, which implemented the conversion of a complex digital baseband signal to a real passband signal. 然后采用正交数字上变频(DUC)技术进行基带信号数字域调制和频率变换。
A novel duplex Radio-over-Fiber system simultaneously transmit baseband signal 一种同时传输基带信号的RoF双工系统
Analyzing the Effect Group Delay Characteristic on Baseband Signal Transmission 群时延特性对基带信号传输的影响分析
The digital baseband signal's transmission is one of digital communication system's important components. 数字基带信号的传输是数字通信系统的重要组成部分之一。
Simulation of Multi-state Digital Baseband Signal's Power Spectral Density 多进制基带信号功率谱密度的仿真分析
Baseband Signal Encryption and SOPC Achieve Based on Chaos Theory 基于混沌理论的基带信号加密及其SOPC实现
Research and Implementation on Baseband Signal Processing Algorithm of GPS Software Receiver GPS软件接收机基带处理算法的研究和实现
The user generates the baseband signal which is routed to the earth station through the terrestrial network. 用户发出的基带信号按规定的通路经过地面网络送到地球站。
ICNIA general signal processor mostly is the same with general digital process of intermediate frequency and baseband signal in ICNIA system, and has interface function with major control computer. ICNIA通用信号处理板主要目的是构造ICNIA系统中中频及基带信号的通用化数字处理平台,并完成与主控计算机之间的通信接口功能。
The thesis expounds the cell design and timing design of the FPGA circuit in main controlling and baseband signal processing module, and develops the hardware of it, and programs part of the software. 文中详细阐述了主控与基带处理单元中FPGA模块设计与时序设计,研制了主控与基带信息处理单元硬件,编写了部分调试软件。
Secondly, the characteristic of baseband signal and frequency band signal in RFID system are analyzed. 其次,分析射频识别系统基带信号与频带信号的特性,以及信道噪声与干扰的特点,指明信号的潜在影响因素。
Baseband signal pre-processing and some interface circuits are realized in FPGA. Experimented results satisfy the required. 使用FPGA完成了基带信号预处理和多个接口电路的功能,实测结果满足要求。
By peak value sampling the information of baseband signal can be obtained from an AM signal directly. By frequency conversion sampling the carrier wave's frequency of a PSK signal can be cut down. 对AM信号进行峰值采样可以直接获得基带信号的信息,对PSK信号进行变频采样可以降低其载波频率。
In demodulation type transponder the demodulated baseband signal accompanied by noise is used for further modulation and retransmission. 在解调型应答机中,解调的基带信号和伴随的噪声一起再调制和转发。
This paper designs a code generator of baseband signal based on FPGA. 设计一个基于FPGA的基带信号码发生器。
The design of software module includes the parameter design for DDC filter and the baseband signal processing of DSP. And the realization of the Viterbi channel decoding algorithm by DSP and the simulation of the burst at the transmitter are discussed. 模块的软件设计主要包括:DDC滤波器参数设计和DSP的基带信号处理,给出了Viterbi信道译码算法DSP实现和发射端突发形成的仿真实现。
DSP accomplishes the baseband signal processing, the DDC and the DUC deal with the transformation between baseband signal and IF signal, multi-sample rate signal processing, signal modulation and demodulation. 系统中DSP主要完成基带信号的处理,上下变频器完成基带和中频信号之间的转换、系统的多抽样率信号处理和信号的调制解调。
Based on those researches, this paper researches digital baseband signal predistorting technique. 本论文在此基础上,系统、深入地研究了数字基带信号的预失真技术。
Based on the analytical theory of communication baseband signal, the spectrum of low frequency time-code signal is deeply studied, and the analytical expression of practical signal is provided. 根据通信基带信号分析理论,对低频时码信号的频谱进行了研究,给出了实际信号的解析表达,对其频谱进行了分析。
This paper researches and realizes the major algorithms of GPS receiver baseband signal processing and navigation solution. 本课题主要完成了GPS接收机基带信号处理及导航解算各主要算法的研究与实现。
Research on baseband signal processing for software GPS receiver GPS软件接收机基带信号处理研究
IJF coding refers to converting digital baseband signal into Intersymbol Interference and Jitter Free baseband signal. IJF编码是将数字基带信号变换成无符号间干扰和抖动的基带波形信号。
RF signal is synthesized by the method of digital baseband signal and quadrature modulation. 整个射频信号的合成则采用基带信号合成加正交调制的方式来完成。
Module hardware design includes: A/ D converter. DDC and DSP. are discussed in detail in the A/ D converter and a DDC device design and application: software design includes: DSP baseband signal processing and parameter design of DDC filters. 模块中的硬件设计包括:A/D转换器、DDC及DSP.详细讨论了A/D转换器和DDC器件的设计及应用:软件设计包括:DSP的基带信号处理及DDC滤波器参数设计。
Baseband signal acquisition consists of digital down convertion, down sampling and multi-phase filter design. 基带信号获取包括下变频、下采样和多相滤波器的设计。
At the stage of implementation, the baseband signal processing module, pulse shaping filter and direct sequence UWB system were implemented with FPGA. 在实现阶段,利用FPGA实现了直接序列超宽带系统的基带信号处理模块、脉冲成形滤波器和接收系统的相关检测器等。
Ranging baseband signal is the core of the navigation and positioning system. 测距基带信号的产生是整个导航定位系统的核心。
Different digital baseband signal corresponds to different density function, which makes signal classification possible. 指出了不同类型的数字基带信号对应不同的总体概率密度函数,使得分类信号成为可能。
Taking communication system as an example, there are several stages of filters to recover the baseband signal. 例如在通信系统中结构简单的模数转换器后面一般都会有若干阶段的滤波器来恢复基带信号。