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一个圆周卷积的代码~调用形式为y=juanji(h,x1,M) 其中,h和x1为输入,h为滤波器系数,x1为输入采样信号,输出为y,M为输入信号x1的长度。-A circular convolution of the code to call the form of y = juanji (h, x1, M) of them, h, and x1 for the input, h for the filter coefficient, x1 sampling input signals, o
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F310的完整代码,实现从模拟端口对视频信号采样,并将所采得的图像信息以RS232方式发送到上位机PC中,并在上位机实现图像的还原过程。-F310 complete code, realize from analog port for video signal sampling, and collected by the image information to RS232 mode is sent to the host computer PC, and PC realize image re
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脉冲编码调制(PCM)实现
编程实现PCM技术的三个过程:采样、量化与编码。
采样:低通连续信号采样,以 x=sin(200*t) m=x./(200*t) m=m.*m 为例说明低通采样定理,绘出信号时、频图形;带通连续信号采样,以x=sin(20*t) m=x./t 为例说明带通采样定理,绘出信号时、频图形。
量化:均匀量化,以幅度 的正弦信号为例实现为64级电平的均匀量化;非均匀量化,输入A律PCM编码器的正弦信号 ,采样序列为 ,将其进行PCM编码,给出编码器的输出码组序列
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基于采样率变换和循环卷积的GPS信号快速捕获。提出了一种适用于GPS软件接收机的C/A码和多普勒频移的快速捕获算法。该算法结合了采样变换FFT和时域卷积两种方法,提高了捕获速度和多普勒频移的精度。-Based on the sampling rate conversion and fast circular convolution of the GPS signal capture. Presents a GPS receiver software for C/A code and Dopple
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由MATLAB程序产生2Gbi/s的基带OFDM信号先将2^15-1个伪随机序列映射到256个进行4QAM编码调制的子载波上,编码后的OFDM符号再经过IFFT变换将其转换为时域波形,接着添加6.4ns的循环前缀(CP),产生的数据波形再装载到Tektronix任意波形发生器(AWG)中,产生2Gbit/s的基带OFDM信号。基带OFDM信号频谱示意图如图3所示。其中包括256个OFDM子载波256个子载波中200个子信道用来传送数据信号,27个高频和28个低频子信道为了过采样的需要置0,OFD
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数字基带传输系统 代码 眼图 误码率
a=0.5 tao=Ts/2 phi=0。信噪比15,采样偏差0,滚余弦系数0.5,占空比0.5,-Digital baseband transmission system bit error rate of the code eye diagram a = 0.5 Tao = Ts/2 phi = 0. Signal-to-noise ratio 15, the sampling deviation, roll cosine coefficient
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64QAM基带系统接收机matlab代码:添加AWGN噪声,进行接收端匹配滤波器,8倍下采样,解调信号。-64QAM baseband system receiver matlab code: add AWGN noise, matched filter receiving end, eight times the down-sampling, the demodulated signal.
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there is code for sampling a signal and adding random noise in signal-there is code for sampling a signal and adding random noise in signal...
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signal generation code for compressive sampling
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检测8K采样频率,16位PCM码流的DTMF信号
标准的DTMF双频的检测还是可以的
误差检测可能不是很精确......以后再优化
压缩包里有C源码,build出来的elf文件,原始PCM码流(Detect 8K sampling frequency, 16 bit PCM bitstream DTMF signal
Standard DTMF dual frequency detection is fine
Error detection may not be accurate...
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MATLAB跳频仿真源代码,展示了整个跳频通信过程,包括信号源产生、2FSK调制、跳频扩频、跳频解调、2FSK解调、抽样判决、恢复原始信号过程,适合初学者(MATLAB frequency hopping simulation source code, showing the entire frequency hopping communication process, including signal source generation, 2FSK modulation, frequency
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