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HART协议由Rosemount公司开发且已向每个使用者开放HART协议采用标准的Bell 202频移键控信号以1200波特通信以低电平加载于4mA~20mA模拟信号上，由于载波信号的平均值为零所以它对模拟信号没有影响。-HART agreement develops by Rosemount Corporation also opened
the HART agreement to each user to use the standard the Bell 202
frequency-s
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产生一个频移键控信号（FSK），该产生的信号可供复数解析用，频率归一化-produce a signal frequency shift keying (FSK), which is the signal for analysis using the plural, to a frequency of
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２ＦＳＫ２ＰＳＫ－二进制频移键控和相移键控信号发生器的源程序，是基于ＱＵＡＲＴＵＳ ＩＩ软件平台，使用ＶＨＤＬ语言-2FSK2PSK-binary frequency shift keying and phase shift keying signal generator source, QUARTUS II is based on the software platform, the use of VHDL
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GSM 调制的协议规定，主要是GMSK 高斯滤波最小移频键控调制 里面具体说明了调制方法和参数-GSM modulation of the agreement, is the smallest GMSK Gaussian filter frequency-shift keying modulation inside specify the modulation method and parameters
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Hart源代码．HART协议简介下载30次,HART协议由Rosemount公司开发且已向每个使用者开放HART协议采用标准的频移键控．-Hart source code. HART agreement on downloaded 30 times. HART protocol developed by Rosemount and each user has to agree to adopt open standards HART The frequency shift keying.
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频移键控FSK的Verilog实现，带测试文件，并在FPGA开发板上成功验证-Frequency Shift Keying FSK the Verilog implementation, with the test file, and successfully verified in FPGA development board
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.FSK、PSK、ASK调制原理 在数字通信系统中，数字基带信号通常要经过数字调制后再传输。常见的调制方式有频移键控（FSK）、相移键控（PSK）、幅移键控（ASK）-. FSK, PSK, ASK modulation principle in digital communication systems, digital baseband signal is usually subject to digital modulation and then transmitted. Common m
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scr ipt for generting transmit waveforms in a minimum shift keying, a form of continuous phase frequency shift keying
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以C语言来实现DPSK（差分频移键控）的调制与解调-In C language to achieve DPSK (differential frequency shift keying) modulation and demodulation
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GMSK是高斯滤波的最小频移键控的简称，基本的工作原理是将基带信号先经过高斯滤波器成形，再进行最小频移键控(MSK)调制。由于成形后的高斯脉冲包络无陡峭边沿，亦无拐点，因此频谱特性优于MSK信号的频谱特性。-GMSK Gaussian filter is the smallest FSK abbreviation, the basic working principle is to base-band signal to pass Gaussian filter shape, and then
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DIGITAL MODULATION TECHNIQUES
the material describes digital modulation techniques such as BINARY PHASE SHIFT KEYING (BPSK), DIFFERENTIAL PSK (DPSK), DIFFERENTIALLY-ENCODED PSK (DEPSK), QUADRATURE PSK (QPSK), QUADRATURE AMPLITUDE SHIFT KEYING (Q-AS
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本设计采用AT89552单片机，辅以必要的模拟电路，实现了一个基于直接数字频率合成技术(DDS)的正弦谊号发生器。设计中采用DDS芯片AD9850产生频率1KHZ~10MHZ范围内正弦波，采用功放AD811控制输出电压幅度， 由单片机AT89S52控制调节步进频率1HZ。在此基础上，用模拟乘法器MC1496实现了正弦调制信号频率为1KHZ的模拟相度调制信号；用FPGA芯片产生二进制NRZ码,与AD9850结合实现相移键控PSK、幅移键控ASK、频移镇键FSK。-AT89552 the singl
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基于Systemview的通信系统的仿真
主要是运用Systemview软件对二进制振幅键控（2ASK）系统、二进制移频键控（2FSK）系统、二进制移相键控（2PSK）系统以及二进制差分相位键控（2DPSK）系统进行设计，然后对设计的系统进行仿真，这其中分别包括它们的调制和解调系统。-Systemview based simulation of communication systems is the use of software Systemview binary amplitude s
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Cross – Correlation of the Two FSK Signals.
FREQUENCY SHIFT KEYING - ERROR PROBABILITY:
The Probability of error of an FSK system depends on the separation of “distance” d, between two (or more) signals
The probability of error is minimu
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A simulink simulation model : 4 level frequency shift keying modulation and demodulation simulation.
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采用配电线载波系统
的配电自动化
第5-1部分：低层协议—扩频型移频键控
（S-FSK）规约
-Using distribution line carrier system, distribution automation the first 5-1 parts: the lower the agreement- spread-spectrum frequency-shift keying-type (S-FSK) of the Statute
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可以实现二进制振幅键控、二进制频移键控和二进制相位键控的解调和调制功能。-Can achieve binary amplitude shift keying, binary frequency shift keying and binary phase shift keying demodulation and modulation functions.
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digital modulation of the bit sequence, frequency modulation, amplitude modulation, phase shift keying, frequency shift keying
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现代通信原理课程中，在MATLAB中实现二进制频移键控调制程序。-Modern communication theory course, to implement in MATLAB binary frequency shift keying modulation program.
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Amplitude-shift keying (ASK) is a form of modulation that represents digital data as variations in the amplitude of a carrier wave.
Any din scheme uses a finite number of distinct signals to represent digital data. ASK uses a finite number of ampli
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