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OFDM is a frequency-division multiplexing (FDM) scheme used as a digital multi-carrier modulation method. A large number of closely spaced orthogonal sub-carrier signals are used to carry data on several parallel data streams or channels.
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orthoganal frequency division multeplexing modulation
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ofdm system simulation including 16qam modulation fft windowing modules plus cp, Analysis of the signal time domain, frequency domain, cepstrum, cyclic spectrum, etc. MinkowskiMethod algorithm.
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通过两个例子,将Optisystem和matlab这两个软件结合进行光学仿真,两个例子分别为光波频率右移和光波幅度调制。通过这两个例子,能很好的理解这两个软件的协同仿真。上传的文件包括文献和源码,还有optisystem的osd文件,文件很全。(Two examples are used to combine the two software Optisystem and MATLAB for optical simulation. The two examples are the right
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基于MATLAB,am信号的调制-解调-滤波 分别加入小噪声信号和大噪声信号进行频谱分析(Based on MATLAB, the modulation demodulation filtering of AM signal is added to small signal and large noise signal for frequency spectrum analysis)
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bpsk扩频调制,先进行扩频调制,再进行bpsk调制。有功率谱和频谱(First carries on the spread spectrum modulation, in BPSK modulation, frequency spectrum and power spectrum)
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Realize image watermarking, de-noising, plus noise and other functions, NRZ type differential phase modulation signal modeling and simulation analysis, esprit algorithm signal frequency interference can be assesse.
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主要包括扩频、多元扩频、跳频、正交多载波调制OFDM系统的MATLAB仿真(Including MATLAB simulation, spread spectrum and frequency hopping spread spectrum multiple orthogonal multi carrier modulation OFDM system)
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利用MATLAB集成环境下的M文件,编写程序来实现MSK的调制解调,并绘制出解调前后的时域和频域波形及叠加噪声时解调前后的时频波形,根据运行结果和波形来分析该解调过程的正确性及信道对信号传输的影响。通过这次课程设计进一步加深了我对最小二进制相移键控(MSK)调制解调性能的理解与掌握,同时将课堂上学到的理论知识用于实践。增强了我在模拟仿真方面的能力,为以后系统开发和通信系统仿真打下了良好的基础。(The use of MATLAB in the integrated environment of
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ofdm system simulation including 16qam modulation fft windowing modules plus cp, When processing a signal frequency analysis, Undergraduate complete set requirements refer to the standard test models.
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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 OFDM communication system simulation design, including coding, modulation, IFFT,
Up and down frequency conversion, Gaus
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QPSK,oQPSK调制仿真,基带信号,经过带通滤波器以后的时域图形,频域波形。(QPSK, oQPSK modulation simulation, baseband signal, through the band pass filter after the time domain graphics, frequency domain waveform.)
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这是一个非常完整的qpsk调制解调用fpga实现的工程,在工程中已经能够正常使用,使用的quartus ii 开发,使用Verilog语言,文件中还包含了各种滤波器的系数文件,还有matlab仿真文件,整个工程包含从串并变换,相位映射,到成型滤波,中通滤波,cic滤波,调制,再到解调过成的下变频,匹配滤波,载波提取,位定时,判决,整个完整的过程(This is a very complete QPSK modulation and demodulation using FPGA implemen
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2ASK,2PSK,2FSK调制与解调编程仿真,显示各步骤的时域图和频域图(2ASK, 2PSK, 2FSK modulation and demodulation programming simulation, showing the time domain diagram and frequency domain diagram of each step)
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该工程实现对单载波系统QPSK的频偏估计算法。调相信号在接收机相干解调时需要同频同相的参考载波,而发射机和接收机之间往往存在频率偏差,为了消除这种误差,必须在软件层面实现。使用了QPSK四相调制的信号特点进行载波频偏估计,经验证,效果较好。(This project implements frequency offset estimation algorithm for single carrier system QPSK. The phase modulation signal needs t
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①传输的数据随机产生,要求采用频带传输(BPSK调制);
②扩频码要求采用周期为63(或127)的m序列;
③仿真从基站发送数据到三个不同的用户,各不同用户分别进行数据接收;
④设计三种不同的功率延迟分布,从基站到达三个不同的用户分别经过多径衰落(路径数分别为2,3,4);
⑤三个用户接收端分别解出各自的数据并与发送前的数据进行差错比较。((1) the transmission data is randomly generated, requiring frequency band t
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因此,通过在数字预编码器上实施正交约束,然后提出低复杂度的AltMin算法。 此外,对于部分连接的结构,AltMin算法也是在半定理松弛的帮助下开发的。为了实际实施,所提出的AltMin算法进一步扩展到具有正交频分复用调制的宽带设置。 仿真结果将证明所提出的AltMin算法相对于现有的混合预编码算法具有显着的性能增益。 此外,基于所提出的算法,两种混合预编码结构之间的仿真比较将提供有价值的设计见解。(Therefore, by implementing orthogonal constraint
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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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OFDM调制发射和接收仿真,考虑两种调制方式,16qam及qpsk调制,使用LS信道估计和频域均衡(OFDM modulation transmission and reception simulation, considering two modulation modes, 16QAM and QPSK modulation, using LS channel estimation and frequency domain equalization.)
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采用QPSK调制,研究OFDM多普勒频移估计与补偿算法(Research on Doppler Frequency Shift Estimation and Compensation Algorithms for OFDM Using QPSK Modulation)
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