中频信号

一种新的LFM中频信号产生电路校正算法

A Novel Calibration Algorithm of LFM IF Signal Generator Circuit

高动态GPS中频信号模拟器的关键技术研究

Key technique for an IF signal simulator in high dynamic GPS

GPS卫星信号模拟器中频信号处理与实现

Implementation of IF signal processing in GPS satellite signal simulator

旋转状态下GPS中频信号仿真研究

Simulation of GPS IF Signal in a Spinning State

GPS接收机的中频信号处理算法研究

Research on Signal Processing Algorithms in GPS Receivers

GPS中频信号处理及其FPGA实现

GPS Intermediate Signals Processing and the Implementation on FPGA

基于FPGA的数字中频信号发生器硬件设计

Hardware design of digital mid - frequency signal generator based on FPGA

基于USB和FPGA的GPS中频信号采集平台设计

Design of GPS IF Signal Sampling Platform Based on USB and FPGA

GPS中频信号模拟研究

Research on IF GPS Signal Simulator

基于多相滤波法的中频信号正交解调的CPLD实现

Implementation with CPLD of IF Signals by Quadrature Demodulation Based on Polyphase Filtering

采用GPS中频信号采样器采集实际GPS数据，对搜索和跟踪算法进行了验证。

A GPS digitized intermediate frequency signal sampler was used to validate the algorithm of acquisition and tracking of software receiver .

GPS天线信号到射频前端变换后的中频信号，再经模拟数字转换，便可得捕获与跟踪的原始信号。

The raw acquisition & tracking signal is extracted by down-conversion from RF to IF , through analog to digital conversion .

基于DDS技术的雷达中频信号模拟器信号源

Oscillator of radar IF signal simulator based on DDS technology

射频前端接收芯片实现GPS信号的接收、放大、滤波和下变频，其中最重要的是对GPS信号进行下变频转化为数字中频信号。

RF front end receives , magnifies and filtrates the GPS signal , and above all , converts it down to IF digital signal .

地、海杂波中频信号的DDS产生及合成

The Generation and Synthesis of Intermediate Frequency Signal of Ground and Sea Clutters by DDS

软件GNSS信号模拟器架构与中频信号生成

Architecture of software-based GNSS signal simulator and implementation of its IF signals generation

因为中频信号处理电路的性能好坏直接影响着基带信号处理的效果，所以论文通过ADS仿真，反复实验来选取中频信号处理电路中各器件的最佳参数值。

IF signal processing performance affects the baseband signal processing directly , so select the best parameter through ADS simulation and repeated experiments .

它将数字中频信号下变频至零中频信号，并使信号速率降至通用DSP器件能够处理的速率。

It converts the digital intermediate frequency signal down to zero intermediate frequency signal , and lessens the signal rate to the rate which the DSP processor can handle .

课题完成了雷达中频信号经A/D变换、数字下变频处理后通过PCI总线接口输入计算机；

The radar IF signal after A / D sampling and digital down converter transfer to host through PCI bus for further signal processing .

汽车毫米波FMCW雷达中频信号的采样与处理

Middle Frequency Signal Sampling Processing Method of Automobile Millimeter Wave FMCW Radar

数字中频信号首先通过数字混频下变频至零中频，然后作加海窗的复FFT谱分析。

The digital IF signal is converted to zero IF by digital down converter , then taken FFT spectrum analysis with Hann window in advance .

线性FMCW雷达中频信号的采样准则和频谱特性

The Sampling Criteria and Spectrum Features of the IF Signal in Linear FMCW Radar

改进的数字化TDRSS中频信号捕获跟踪系统

Improved TDRSS IF signal acquisition and tracking digital system

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。

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 .

为了进行后续的软件模块仿真，我们讨论了仿真所需的GPS物理模块，其中包括C/A码的产生和调制中频信号的数学模型。

Further we discuss the mathematical model of physical blocks in order to process the software simulation . It includes the generator of C / A Code and the model of GPS Intermediate Frequency signals .

探讨了基于ARM7微处理器+uC/osII构建的嵌入式系统在雷达中频信号模拟器中的应用。

The paper briefly presented the application of embedded system , ARM7 + uC / OS-II , in the design of intermediate frequency signal simulator for radar .

输入ROF系统的电信号可以是基带数字信号、中频信号和射频信号。

The input electrical signal in ROF system may be base-band digital signal , intermediate-frequency signal or radio-frequency signal .

TDRSS中频信号的捕获与跟踪

TDRSS IF Signal Acquisition and Tracking

波形合成采用直接对带限中频信号采样，用高速DAC合成方法实现。

Waveform synthesis was made with the method of sampling directly the bandlimited IF signal and transforming the discrete values by high speed DAC .

本文提出了两种不同平台下的伽利略E1中频信号仿真方法，其多普勒频移可调，时长可调并且信噪比可调。

This paper presented two different methods for the simulation of Galileo E1 IF digital signal with adjustable carrier-to-noise ratio , simulation time and Doppler .