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本文介绍了在SPWM 调制中TM S320F240 数字信号处理
芯片的使用, 利用双极式
等面积脉宽调制波的算法, 产生不同频率的SPWM 波, -This article describes the SPWM modulation TM S320F240 digital signal processing
The use of the chip, the use of bipolar
Equal area PWM wave algorithm to generate SP
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实现FSK调制，由计算机随机产生二进制码元，可自主更改载频频率同时可以加入不同信噪比的白噪声。-Achieve FSK modulation, the binary code randomly generated by a computer element, change the carrier frequency can be independently the same time can be added to the white noise of different signal to n
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高斯函数调制的源程序代码，频率为2.5Mhz-Gaussian function of the source code modulation frequency of 2.5Mhz
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蓝牙通信模块：包含了输入输出、语音编码、前向纠错、GFSK调制、跳频等-Simulink model of a Bluetooth communication. Includes I/O, speech coding, FEC, GFSK Modulation, frequency hopping, and so on.
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ＱＰＳＫ的调制和解调，画出时域和频域的对比图，非常完整，绝对可用-QPSK modulation and demodulation, and draw the time-domain and frequency domain comparison chart, very complete, absolutely free
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一、 本程序采用16QAM调制方式，对一串2进制信源进行调制，用升余弦滚降函数进行基带调制，再调到高频信道；在信道上加入高斯白噪声，运用匹配滤波器解调，画出解调星座图，运用最小欧氏距离译码判决，计算误比特率。-First, the program uses 16QAM modulation, the source of a string of two binary modulation, with the Raised Cosine modulated baseband functions, a
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扩频通信系统仿真 ——系统将基带信号（即信息）的频谱扩展至很宽的频带上，然后再进行传输，即将欲传输的信息数据用伪随机序列编码调制，实现频谱扩展，然后通过信道编码发送出去；接收端采用与发送端完全相同的伪随机序列作为本地解扩信号进行相关处理，以恢复信息，最后进行解调，完成整个系统的接收。-Simulation of spread spectrum communication system- the system baseband signal (ie, information) be extende
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用不同的算法来实现SPWM脉宽调制变频器，用了等面积法，不对称和对称采样法，自然采样法1-Use different algorithms to achieve SPWM pulse width modulation frequency, with the other area of law, asymmetric and symmetric sampling, natural sampling 1
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随着信息容量的增加和频率资源的稀缺，为提高单位频带利用率，在微波通信系统中越来越多地采用多电平多相位的复杂信号调制方式，尤其是正交幅度调制(QAM)得到了大量的应用，从早期的4QAM到今天的16QAM。高阶QAM调制大容量数字微波通信系统为了保证服务质量，降低误码率，-long with the increase of information capacity and frequency resource scarcity, for improving the utilization ratio
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单载波频域均衡的完全编码，包括了调制解调，独特字，传输模拟，信道估计，频域均衡器设计等等完全的理论。-Single-carrier frequency domain equalization, including modulation/demodulation, unique words, transmission simulation, channel estimation, frequency-domain-equalizer design, etc.
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this code is to perform frequency shift keying modulation technique
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采样控制理论中有一个重要结论:冲量相等而形状不同的窄脉冲加在具有惯性的环节上时,其效果基本相同.PWM控制技术就是以该结论为理论基础,对半导体开关器件的导通和关断进行控制,使输出端得到一系列幅值相等而宽度不相等的脉冲,用这些脉冲来代替正弦波或其他所需要的波形.按一定的规则对各脉冲的宽度进行调制,既可改变逆变电路输出电压的大小,也可改变输出频率.-Sampling control theory has an important conclusion: the impulse is equal bu
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设基带码元传输间隔为0.1秒，FSK调制参数分别设置频率间隔为5Hz和20Hz，相位分别设置为不连续的和连续的两种。试对比观察4元FSK调制输出等效低通信号的功率频谱。-Let the baseband symbol transmission interval is 0.1 seconds, FSK modulation parameters are set the frequency interval of 5Hz and 20Hz, respectively, set to the disc
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这是一个相对完整的OFDM通信系统的仿真设计，包括编码，调制，IFFT，
上下变频，高斯信道建模，FFT，PAPR抑制，各种同步，解调和解码等模
块，并统括系统性能的仿真验证了系统设计的可靠性
- This is a relatively complete simulation of OFDM communication system design, including coding, modulation, IFFT, upper and lower frequency,
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基于DDS的正弦波发生器 调制波发生器，能实现实时调幅，并在示波器上显示，还能测出各自的频率-Sine wave generator based on DDS modulation wave generator, to achieve real-time amplitude and displayed on an oscilloscope, but also measured the frequency of them
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电子设计竞赛中获二等奖，在FPGA中实现的两路自然采样SPWM，原理图输入法设计，1024*八位正弦查找表，带FSK和ASK调制功能，频率范围8KHz~12KHz.-Electronic Design Competition second prize in the FPGA to achieve the two natural sampling SPWM, schematic design input, 1024* eight sine look-up table, with FSK and A
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simulink中直扩，跳频的实现方案，其中有3种不同的调制方式，和跳频点设计。-simulink in DSSS, frequency hopping implementation proposals, including three different modulation and frequency hopping point design.
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改进的PRI变换应用于重频正弦调制脉冲序列-Improve the PRI transform to sinusoidal modulation pulse sequence re-frequency
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正交频分复用(OFDM)调制技术-基于IEEE802.11g协议标准，点击matlab可运行-Orthogonal frequency division multiplexing (OFDM) modulation technique- based on the IEEE802.11g standard protocol, click to run matlab
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超短激光脉冲传输：展宽、色散、自自相位调制、倍频、FROG，超短脉冲测量-Ultrashort laser pulse transmission: broadening, dispersion, since the self-phase modulation, frequency, FROG, ultra-short pulse measurement
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