Description: ％The phase locked loop(PLL),adjusts the phase of a local oscillator
％w.r.t the incoming modulated signal.In this way,the phase of the
％incoming signal is locked and the signal is demodulated.This scheme
％is used in PM and FM as well.
％We will implement it by using a closed loop system.Control systems
％techniques are applied here. Platform: |
Size: 2464 |
Author:张勇 |
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Description: A system simulation environment in Matlab/Simulink of RFID is constructed in this paper.
Special attention is emphasized on the analog/RF circuit.Negative effects are concerned in the system
model,such as phase noise of the local oscillator,TX-RX coupling,reflection of the environment,
AWGN noise,DC offset,I/Q mismatch,etc.Performance of the whole system can be evaluated by
changing the coding method,parameters of building blocks,and operation distance.Finally,some
simulation results are presented in this paper.
Platform: |
Size: 2099122 |
Author:liulang |
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Description: vc开发的PCI总线加密卡
PCI开发卡主要由PCI9054、93C56、16M晶振和相应的跳线、控制地址数据线等部分组成。PCI9054是PLX公司的PCI主模式桥芯片，具体芯片的说明请见Data Book；93C56是EERPOM，用于向PCI9054的初始化设置信息；16M晶振向9054提供总线时钟和CPLD7128S提供时钟；跳线用于PCI9054的设置，控制地址数据线将PCI9054的Local Bus信号线引出来，用于实验板用。-vc development of the PCI bus card encryption PCI card developed by PCI9054, 93C56, 16M crystal and the corresponding patch cords, control address data line components. PLX PCI9054 is the main mode PCI bridge chip, specific chip See Note Data Book; 93C56 is EERPOM, used to PCI9054 initialization information; 16M crystal oscillator to provide 9,054 CPLD7128S Bus clock and clock; Jumper settings for the PCI9054, control data lines to address the PCI9054 Local Bus signal line leads, the board used for experiments. Platform: |
Size: 882688 |
Author:万宴宾 |
Hits:
Description: ％The phase locked loop(PLL),adjusts the phase of a local oscillator
％w.r.t the incoming modulated signal.In this way,the phase of the
％incoming signal is locked and the signal is demodulated.This scheme
％is used in PM and FM as well.
％We will implement it by using a closed loop system.Control systems
％techniques are applied here.- The phase locked loop (PLL), adjusts the phase of a local oscillator wrt the incoming modulated signal.In this way, the phase of the incoming signal is locked and the signal is demodulated.This scheme is used in PM and FM as well. We will implement it by using a closed loop system.Control systems techniques are applied here. Platform: |
Size: 2048 |
Author:张勇 |
Hits:
Description: A system simulation environment in Matlab/Simulink of RFID is constructed in this paper.
Special attention is emphasized on the analog/RF circuit.Negative effects are concerned in the system
model,such as phase noise of the local oscillator,TX-RX coupling,reflection of the environment,
AWGN noise,DC offset,I/Q mismatch,etc.Performance of the whole system can be evaluated by
changing the coding method,parameters of building blocks,and operation distance.Finally,some
simulation results are presented in this paper.
Platform: |
Size: 2099200 |
Author:liulang |
Hits:
Description: 摘 要：AD9852是美国AD公司生产的新型直接数字频率合成器(DDS)，是一种使用方便灵活、功能较强的芯片。这种商用集成芯片可用于本振合成回路，高精度时钟发生器等。介绍了AD9852的工作原理、功能及其在本机振荡器中的应用。
-Abstract: AD9852 is AD the United States produced a new type of direct digital synthesizers (DDS), is a flexible and easy to use, more powerful chips. This chip can be used for commercial LO synthesis loop, high-precision clock generator, etc.. Introduce the working principle of the AD9852, functions and its application in the local oscillator applications. Platform: |
Size: 103424 |
Author:梅名 |
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Description: 锁相环（非科斯塔斯环） 对波动频率进行锁定，并且对信号进行解调。画图7个显示过程及参数-The phase locked loop(PLL),adjusts the phase of a local oscillator.the phase of the
incoming signal is locked and the signal is demodulated show the process and references in 7 figures Platform: |
Size: 1024 |
Author:张欣蕊 |
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Description: 锁相环是一种反馈电路，其作用是使得电路上的时钟和某一外部时钟的相位同步。PLL通过比较外部信号的相位和由压控晶振（VCXO）的相位来实现同步的，在比较的过程中，锁相环电路会不断根据外部信号的相位来调整本地晶振的时钟相位，直到两个信号的相位同步。-PLL is a feedback circuit, and its role is to make the clock circuit and a phase of external clock synchronization. PLL signal by comparing the external voltage-controlled crystal phase and the (VCXO) to achieve synchronization phase, in comparison, the phase-locked loop circuit will continue in accordance with external signals of local oscillator phase to adjust the clock phase, until Phase synchronization of two signals. Platform: |
Size: 141312 |
Author:liusen |
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Description: 该频率合成器ADF4116可用于家庭
实施本地振荡器的上变频和下变频
各款无线接收器和发射器。-The ADF4116 frequency synthesizer can be used for domestic implementation of the local oscillator in the upconversion and downconversion sections of wireless receivers and transmitters. Platform: |
Size: 212992 |
Author:峰之巅 |
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Description: This M-file plots the common spur charts used for determining interference frequencies during a non-linear operation (such as mixing) which could cause inter-modulation distortion. The inter-modulation product order can be specified along with the type of mixing employed in the receive path of the communication receiver. Spur Chats for sum mixing, difference mixing with low-side local oscillator, and difference mixing with high-side local oscillator can be plotted. Furthermore, the order of inter-modulation distortion can be specified as well. Platform: |
Size: 1024 |
Author:bikramaditya |
Hits:
Description: 使用MSP4301611作为主控，ad9954作为本振，sa636是接收器构成了一个FM接收机，采用12864作为界面-Use MSP4301611 as master, ad9954 as a local oscillator, sa636 is the receiver, a FM receiver form, using 12864 as the interface Platform: |
Size: 394240 |
Author:王志华 |
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Description: In this project, we consider the problem of estimating a parameter associated with
the local oscillator leakage of a RF receiver by tone test. For this reason, an approxi-
mate maximum-likelihood (ML) estimator is proposed. It s error performance is analyzed
by Monte-Carlo (MC) simulations and compared to the theoretical Cramer-Rao Lower
Bounds. Platform: |
Size: 2048 |
Author:reza |
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Description: ssb解调方法，不是相干解调，不需要载波恢复，比较实用。- A single sideband (SSB) demodulation method is described, in which frequency mixing is
not required. The proposed method is based on the phase shift method, but no local oscillator is
employed. Platform: |
Size: 319488 |
Author:马春雷 |
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Description: 20X20方阵振源天线方向图，变量为方位角和俯仰角，初始化参数为振源行列数、观察范围和波长-20X20 square vibration source antenna direction diagram, variable azimuth and elevation, the initialization parameters for the number of local oscillator ranks to observe the range and wavelength Platform: |
Size: 1024 |
Author:felix |
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Description: Local oscillator frequency-hopping source control program based on the microcontroller the ATmega128 SPI interface Platform: |
Size: 12288 |
Author:邹光亮 |
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Description: .DDS现已广泛应用于接收机本振、信号发生器、仪器、通信系统、雷达系统等,尤其适合于跳频无线通信系统.1 DDS电路结构及-. DDS is now widely used in the receiver local oscillator signal generator, equipment, communications systems, radar systems, especially suitable for frequency hopping wireless communication system .1 DDS circuit structure and Platform: |
Size: 2048 |
Author:郭力 |
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Description: 在有限的实验条件下，为验证高动态软件GPS接收机信号的捕获和跟踪模型，提出了一种基于软件GPS
接收平台的高动态GPS数字中频信号模拟方法。介绍了软件GPS接收平台的基本结构框架，并根据高动态环境
下伪随机码的多普勒效应及本地振荡器的频率误差对接收信号的影响，推导并建立了一种较精确的高动态GPS
数字中频信号模型。为使模型适用于更加复杂的环境，通过设置接收信号的噪声幅值来调整信噪比大小，以确
定所需的信号强度；在信号参数的设置过程中调整入射信号与反射信号的幅度比值及反射信号的时间延迟参
数，以模拟不同程度的多路径效应对中频信号的影响。仿真结果表明了该方法的有效性。-In order to validate the model for capturing and tracking the high dynamic signal of the software GPS
receiver on limited experiment condition, a method for modeling the high dynamic numeric IF signal was presented
based on the software GPS receiver platform. The basic frame of the software GPS receiver platform structure was
introduced, and according to the impact of the Doppler effect of the pseudo-noise code and the frequency error of the
local oscillator on the received signal in high dynamic environment, a more precise model of high dynamic GPS
numeric IF signal was deduced and established. To make the model be applicable in more complicated environment,
the required intensity of the signal was obtained by setting the noise’s magnitude of the received signal and adjusting
the Signal-to-Noise ratio. In the process of setting the signal parameters, the ratio of the incident signal’s magnitude to
the reflected one and the time delay of the reflected signal were adjust Platform: |
Size: 721920 |
Author:luchan |
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Description: 控制AD9850生成一定频率的正弦波，用于产生本振信号。-AD9850 generates a control frequency sine wave, for generating a local oscillator signal. Platform: |
Size: 992256 |
Author:张希希 |
Hits:
Search - Local oscillator