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产生一组随机的0、1二进制比特序列,分别用2ASK, 2FSK, 2PSK和2DPSK四种调制方式把它们调制到一个较高的载频上,结果给出前8个比特所对应的时域波形。-0,1 generate a set of random binary bit sequence, respectively 2ASK, 2FSK, 2PSK and 2DPSK four kinds of modulation modulation them to a higher carrier frequency, the r
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在本系统中,信息序列在先经过FSK调制,经过截止频率为25kHz的低通滤波器后(把信号频率限制在25kHz),再进入混频器搬移到更高的频率发送出去,在接收端,用与发送端同步的跳频信号对其进行变频(跳频的解跳处理在此进行),取下边频,然后进行FSK的解调-In this system, the message sequence prior through FSK modulation, through the cut-off frequency of 25kHz after low-pass fi
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bpsk的调制与解调的过程,并采用卷积码,讨论其误码性能随着其功率、频偏、相偏而变化.-bpsk modulation and demodulation process and using convolutional codes, to discuss its error performance with its power, frequency offset, phase offset changes.
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Computing the SNR loss due to frequency offset in OFDM modulation
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1.先运行2_28_1再运行3_3_1判断PSK调制方式,得到精确频偏以及符号速率(这里只针对QPSK)
2.根据精确载频以及符号速率运行3_3_2进行匹配滤波
3. 3_3_2进行QPSK解调
4. 未给定信号-1. First Run 2_28_1 run 3_3_1 judge PSK modulation scheme to obtain accurate frequency offset and symbol rate (here only for QPSK) 2. dep
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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
-OFDM full version of the source code, including coding, modulation, IFFT,
Upper and lower frequency, Gaussian channel model, FFT, PAPR suppres
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编写了关于QPSK调制的matlab调制解调代码,其中做了滤波,加载频,加噪声,滤波,误码率性能分析等-Prepared a QPSK modulation modulation and demodulation matlab code, where do the filtering, load frequency, adding noise, filtering, error rate performance analysis
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假设截获了一段短波数字通信的信号,要求解调出最终的信息,每组解调出来后,将10组信息组合起来,恢复最终的信源输出数据。
先验信息:两组数据文件,编号为1、2,每组I、Q两路存放,格式为“int16”,采样率为9600Sa/s,其中第一组为单径情况,第二组为多径情况。
参数符合MIL-STD-188-110A标准;
同步序列为syn=seq.dat,BPSK调制;
接收机频率稳定度高于1e-6。
文件中有效信息总长度为333.75s,其中同步头长为5/12s,每时隙1/6s,训
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2PSK,QPSK,MSK,QAM的调制方式鉴别,其中有符号速率的估计,频偏的估计,确定载频,并画出星座图,用simulink编写-2PSK, QPSK, MSK, QAM modulation scheme identification, including the estimated symbol rate, frequency offset estimate to determine the carrier frequency, and draw the constellations, w
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Calculation of the Euclidean distance between the two matrices, Wavelet packet analysis to extract vibration signal characteristic frequency, Includes the modulation, demodulation, signal to noise ratio calculation.
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