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详细描述MSK信号的产生 调制 以及噪声影响 加入了中频载波 对于研究通信信道有一定帮助-Detailed descr iption of MSK modulation signal is produced and the noise affect joined the intermediate frequency carrier for research communication channel have certain help
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总结了包括
PWM( Pulse Width Modulatio n, 脉宽调制) 变换器、风力发电单元( 含恒速恒频异步风力发电机组、双馈风力
发电机组和直驱式永磁同步风力发电机组) 、太阳能光伏发电单元、各种储能单元( 含蓄电池储能、超级电容器
储能、飞轮储能及超导磁储能) 、负荷及输电线路的分布式发电系统详细的稳态和暂态数学模型, 模型的研究
为进一步研究分布式发电系统及其并网运行特性提供理论基础。-Summarizes the PWM (Pulse Width Modul
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Abstract
Orthogonal frequency division multiplexing (OFDM) is becoming the chosen
modulation technique for wireless communications. OFDM can provide large data
rates with sufficient robustness to radio channel impairments. Many research centers
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The demand of high data rate services has been increasing very rapidly and there
is no slowdown in sight. We know that the data transmission includes both wired
and wireless medium. Often, these services require very reliable data transmission
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相参脉冲串复调制信号，线性调频脉冲串复调制信号，线性调频步进频率脉冲串复调制信号，步进频率脉冲串复调制信号-String complex modulation signals coherent burst complex modulation signal, chirp, chirp stepping frequency bursts complex modulation signal, step frequency bursts complex modulated signals
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VB写的教学用的信号频率生成器的源代码，有的称为信号调制模拟器，用来模拟2ASK、2FSK信号的调制过程，可供娱乐或教学；全部用的VB的算法，对学习算法也有帮助 。-The frequency of the signal generator source code written in VB teaching, some called signal modulated simulator, used to simulate 2ASK, 2FSK signal modulation proc
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This a good example of how to create amplitude modulation with sampling frequency-This is a good example of how to create amplitude modulation with sampling frequency
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包括ask信号的发送接收全过程，包括调制解调，多节传输，频域时域的分析-Ask the signal transmission and reception of the entire process, including modulation and demodulation, the multi-cell transmission, the frequency domain to the time domain analysis
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单边带调制完整建模，实现了希尔伯特变换，DDS，上变频，正交调制-Single sideband modulation of a complete modeling, implementation of the Hilbert transform, DDS, on the frequency, quadrature modulation
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X射线机控制源代码主要对高频微焦点牙科X线机的高频逆变技术、高频变压以及灯丝电路控制原理进行了编写研究。通过程序代码对于管电压以及管电流的控制，采用脉冲宽度调节方式（PWM）实现输出电压和功率的调节。X射线机控制程序通过硬件电路的AD采样经直流逆变、高频变压器、倍压整流形成数字电路经计算机编译得到单片机能够识别的二进制代码来控制机器，其成像极为清晰并且球管发射出的软射线得到了很好的抑制，降低了漏射线量，提高了成像效率，使常规X射线机的结构形状多样化，具有体积小、重量轻、低辐射（其辐射量、漏射线量
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针对此,笔者详细介绍了16QAM差分
调制解调的原理,并通过接收端解码电路相应的运算规则消除了频偏和相偏的影响,免除了复杂的
载波和相位同步,降低了QAM接收机的复杂度。-For this, the author describes the detail of the principle of 16QAM differential modulation and demodulation, and by eliminating the frequency deviation and pha
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CC1000驱动源码,用于驱动底层，配置为曼码通信模式，三线配置接口，外部中断-// Device: CC1020
// System parameters:
// X-tal frequency: 14.745600 MHz Internal
// X-tal accuracy:+/- 5 ppm
// RF frequency A: 433.916 MHz Active Tx
// RF frequency B: 433.916 MHz Inactive Rx
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双边带的调制，可以改变调制信号频率，观测已经调制波形-Double sideband modulation, the modulation signal frequency can be changed, the observation has been modulated waveform
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相位的调制，可以改变调制信号频率，观测已经调制波形-Phase modulation, can change the frequency of modulation signal, the observation has been modulated waveform
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噪声的调制，可以改变调制信号频率，观测已经调制波形-Noise modulation can be changed to the modulating signal frequency, the observation has been modulated waveform
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数字通信中的多普勒频偏估计技术研究，采用开环大频偏估计算法，调制是4/pi_DQPSK-Doppler shift estimation in digital communications technology, the use of open-loop large frequency offset estimation algorithms, modulation is 4/pi_DQPSK
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To study the digital modulation techniques such as on-off keying (OOK), amplitude shift keying (ASK),frequency shift keying (FSK), binary phase shift keying (BPSK) and phase shift keying (PSK) pass band modulation and demodulation using MATLAB Simuli
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基于FPGA的DDS，产生任意频率的正弦波，并且加入am调制-Generate any frequency sine wave, and join am modulation based on FPGA DDS
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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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本程序是锁相环的仿真程序，具有接收端载波同步的功能。注释详尽，程序规范。发端的调制方式有单载波调制，BPSK调制，QPSK调制可供选择。程序中有星座图，锁相环的频差、相差图，以及解调后的基带波形。-This program is a phase-locked loop simulation program, the with carrier synchronization receiving end function. Notes detailed program specifications.
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