FSKNRZ Frequency C Shift Keying,No Return to Zero

Discusses the modern test method for the transmission signal in the signal transmission system with phase-consecutive frequency shift keying (FSK) encoded mode, and describes the relative signal characteristic extraction method with mathematics and presents the characteristic function for the communication signal characteristic extraction method.

对使用了相位连续的频移键控编码方式(FSK)的信号传输系统中的几种传输信号现代检测方法进行了探讨,并对其所对应的信号特征的提取方法进行了数学描述;提出了应用各种通信信号特征提取方法的特征函数,为了可靠地应用各种特征函数,指出了其检测方法的使用方法;最后,对各种信号特征的提取方法进行了比较,得出了相应的结论。

The phase of the Frequency-Shift Keying(FSK) signal transmitted in frequency-shift track circuits is continuous.

移频轨道电路信号是一种相位连续的移频键控(FSK)信号,它的载频和低频信息通过FFT可以很容易的检测出来,但上下边频的高精度检测,一直是比较棘手的问题。

In this article,details of NE564 posed by the FM demodulator,multi-frequency multiplier,and FSK demodulator circuit.

文章介绍了NE564的内部结构、电路特性及使用注意事项,用它构成了调频信号解调器、多路锁相倍频器及移频键控解调电路。

A Study on the FSK Signal Digital Demodulation;

频移键控信号解调方法研究

Based on the characteristics of power line communication (PLC) channel, methods for improving the fundamental modulations for PLC are proposed, such as self-adapting FSK modulation and 50 Hz RF filter.

其中 :对频移键控采取频点的自适应调整、陷波等措施 ,并给出了“软猫”设计方案 ;对正交幅度调制提出了采用格状编码调制技术 ( TCM)的改进措施 ,并进行了相关理论分析 ,以克服 PLC信道的噪声与衰减等不利因素 ,以及协调频带利用率与误码率之间的矛盾。

View of the current underground mine communication system defects, the current combination of small coal mines in Guizhou province in the majority, according to the State Production Safety industry standards, this paper introduced the coal mine communications system based on the A5191HRT chip, the FSK technology and the LPC2104 MCU,as well as some of the hardware design and working principle.

针对目前煤矿井下通信系统的弊端,结合目前贵州省小煤矿居多的情况,按照国家安全生产行业标准,本文介绍了基于A5191HRT芯片,频移键控技术,LPC2104单片机的煤矿通信系统的构成,以及各部分硬件的设计和工作原理。

frequency shift keying

键控频移频移键控频移键位

minimum shift keying

最小转换键控最小频移键控

Frequency-domain equalization for continuous phase frequency shift keying

连续相位频移键控信号的频域均衡算法

A FM/ IF receiver system used in FLEX pager is designed.4 level FSK circuit is emphasized.

以4级频移键控为核心,设计了一种用于FLEX编码的寻呼机调频中频接收电路。

2 Select FSK communication method to combat multipath effect.

2、选择频移键控数据通信方式，提高抗多径干扰的能力。

FSK tone detector

移频键控音频检波器

phase comparison sinusoidal frequency shift keying

相位比较正弦移频键控

multiple frequency shift keying telegraph terminal

多频移频键控电报终端机

BCFSK (Binary Code Frequency Shift Keying)

二进制编码频率移位键控法

frequency differential phase shift keying demodulator

频率差分移相键控解调器

The Frequency-Shift Keying Signal Demodulation Research on LabVIEW

基于LabVIEW平台的键控移频信号解调研究

The design and realization of minimum frequency shift keying modulation system based on FPGA

基于FPGA的最小移频键控调制器的设计与实现

quarter phase-shift-keying modulator

二相移相键控调制器

frequency shift transmitter monitor

频移发射机监控装置

Drag to indicate the location of a video control keyboard.

拖动可指示视频控制键盘的位置。

Research on Key Techniques for Video Surveillance System Based on BACnet;

基于BACnet的视频监控系统关键技术研究

Research on Key Technologies for OFDM Mobile Communication Systems;

正交频分复用（OFDM）移动通信系统关键技术的研究

Research on Key Algorithms of Mobile Video Coding Standard AVS-M;

面向移动的视频编码标准AVS-M关键算法研究