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产生15种模拟及数字调制信号函数。参数说明:type-调制信号种类,total_time-信号总时间长度,fc-载频,fs-抽样频率,symbol_rate-符号率-have 15 analog and digital modulation signal function. Parameter Descr iption : type-modulated signal types,'04-Signal total time length, fc-carrier frequency, fs-
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实现双边带抑制载波调幅信号的时域波形和频域波形的仿真,采样点数默认为2^18。-achieve bilateral suppression of carrier signal amplitude of the time-domain and frequency-domain waveform simulation, The default sampling point to 2 ^ 18.
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对一个信号进行时域采样和频域采样并对比对比,对已知信号进行周期延拓-On a signal in time domain and frequency domain sampling sampling and contrast, to the known signal cycle extension
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IIR数字滤波器的设计,抽样频率为2*pi*1.5*10^4,通带截止频率为2*pi*1.5*10^3-IIR digital filter design, sampling frequency of 2* pi* 1.5* 10 ^ 4, pass-band cut-off frequency of 2* pi* 1.5* 10 ^ 3
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Increasing interest in ultra-wideband (UWB) communications has engendered the need
for a test bed for UWB systems. An FPGA-based software-defined radio provides both postfabrication
definition of the radio and ample parallel processing power. Thi
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This the book "Signals and Systems - made ridiculously simple" by J. Karu in djvu file format. It gives an excellent introduction to system theory and covers all related concepts: Continuous-Time Systems, Frequency Domain, Laplace Transform, Continuo
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这就相当于透过栅栏观赏风景,只能看到频谱的一部分,而其它频率点看不见,因此很可能使一部分有用的频率成分被漏掉,此种现象被称为栅栏效应。
不管是时域采样还是频域采样,都有相应的栅栏效应。只是当时域采样满足采样定理时,栅栏效应不会有什么影响。而频域采样的栅栏效应则影响很大,“挡住”或丢失的频率成分有可能是重要的或具有特征的成分,使信号处理失去意义。
-This quite in penetrates the stockade watching scenery, can only see th
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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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these programs are related to modulation techniques like amplitude modulation, frequency modulation and DSBSC,SSBSC, sampling theorem
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