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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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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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This paper considers frequency-domain receiver
design for OQPSK signals (Offset Quaternary Phase
Shift Keying). It is shown that conventional QPSK receivers
are not suitable to OQPSK schemes since they
lead to significant interference between
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this is a frequency shift keying circuit
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HART协议采用基于Bell202标准的FSK频移键控信号，在低频的4-20mA模拟信号上叠加幅度为0.5mA的音频数字信号进行双向数字通讯，数据传输率为-The HART protocol uses frequency shift keying signal, FSK-based standard Bell202 0.5mA audio digital signal superimposed on the low frequency of 4-20mA analog signal amplit
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本文是一个word文档格式matlab程序，主要讲的是通信系统中最小频移键控的研究（即MSK）文档里面带有仿真的图形和matlab程序，希望对大家有所帮助！-This article is a word document format matlab program, is primarily concerned with the communication system minimum frequency shift keying (MSK) document inside with simul
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A AMPLITUDE SHIFT KEYING ,FREQUENCY SHIFT KEYING AND QUADRATURE SHIFT KEYING PROGRAM WRITTEN IN MATLAB
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根据FSK调制原理
在二进制频移键控中，幅度恒定不变的载波信号的频率随着输入码流的变化而切换（称为高音和低音，代表二进制的1和0）。来做实验
-According to the principle of FSK modulation in the binary frequency shift keying, the frequency of the carrier signal amplitude constant with the change of the input stream
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frequency shift keying
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Binary Frequency Shift Keying (BFSK), the frequency of a constant amplitude carrier signal is switched between two values according to the two possible message states (called high and low tones) corresponding to a binary 1 or 0.Depending on how the f
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Binary Frequency Shift Keying (BFSK), the frequency of a constant amplitude carrier signal is switched between two values according to the two possible message states (called high and low tones) corresponding to a binary 1 or 0.Depending on how the f
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Binary Frequency Shift Keying (BFSK), the frequency of a constant amplitude carrier signal is switched between two values according to the two possible message states (called high and low tones) corresponding to a binary 1 or 0.Depending on how the f
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Binary Frequency Shift Keying (BFSK), the frequency of a constant amplitude carrier signal is switched between two values according to the two possible message states (called high and low tones) corresponding to a binary 1 or 0.Depending on how the f
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HART 官方资料-HART协议采用基于Bell202标准的FSK频移键控信号，在低频的4-20mA模拟信号上叠加幅度为0.5mA的音频数字信号进行双向数字通讯，数据传输率为1.2kbps。-Official information-HART HART protocol based Bell202 standard frequency shift keying FSK signal at low frequencies 4-20mA analog signal amplitude is 0.5m
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数字调制就是把数字基带信号的频谱搬移到高频处，形成适合在信道中传输的带通信号。基本的数字调制方式有振幅键控（ASK）、频移键控（FSK）、绝对相移键控（PSK）、相对（差分）相移键控（DPSK）。在接收端可以采用想干解调或非相干解调还原数字基带信号。
-Digital modulation is the spectrum shifting to high frequency digital baseband signals, suitable for the formation of ban
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A noncoherent, bandwidth-efficient modulation
scheme is proposed for frequency-hopping multiple-access
(FH-MA) networks. The proposed scheme is a combination
of noncoherent -ary amplitude-shift keying (NMASK) and
orthogonal frequency-division
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Binary frequency shift keying ber
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Phase Locked Loops (PLL)
Introduction to PLL
The concept of Phase Locked Loops (PLL) first emerged in the early 1930’s.But the technology was not developed as it now, the cost factor for developing this technology was very high. Since the adva
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Frequency Shift Keying
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this is sagar aglawe jaragnda
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