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LFMdetection

于 2013-10-28 发布文件大小:5KB

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LFM信号及回波的生成，时域及频谱分析，模糊度函数分析，时频分析，匹配滤波器能量检测、循环相关检测、及fmusic参数估计(LFM signal and the echo generation, time domain and spectral analysis, ambiguity function analysis, time-frequency analysis, the matched filter energy detection, loop correlation detection, parameter estimation and fmusic)

文件列表：

LFMdetection
............\fMUSIC.m,2811,2008-07-14
............\LFM_Ambiguity.m,1933,2013-06-19
............\LFM_MatchedFilter.m,299,2013-03-14
............\LFM_S.m,1338,2013-03-20
............\Signal_cumulate.m,2665,2013-10-27

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vad-master
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说明：产生正弦信号时域波形及频谱，并通过希尔伯特滤波器。其中希尔伯特滤波器有两种产生方式，一是使用MATLAB自带的FDAtool；二是程序编写。(The time-domain waveform and spectrum of sinusoidal signal are generated and passed through Hilbert filter. There are two ways to generate Hilbert filter, one is to use FDAtool in MATLAB, the other is to write programs.)

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OFDM降低峰平比采用预失真技术，程序仿真了加入预失真技术后的星座图与未加预失真的比较。结果比较明显。采用QAM映射。(OFDM PAPR reducing the use of pre-distortion technology, process simulation technology to join the pre-distortion of the constellation diagram and the following not pre-distortion comparison. More obvious results.)

2009-04-20 21:45:23下载

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PCM文件采样率转换，其中可以自己定义采样率。作为WAV文件进行存储。效果较好。注意使用时确定源文件采样率。(PCM file sample rate conversion, which could define their own sampling rate. As a WAV file is stored. Effective. Note that when used to determine the source file sample rate.)

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说明：有关信道估计和信道均衡的仿真程序，希望会有所帮助(Related to channel estimation and channel equalization of the simulation program, hoping it would be helpful)

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实现LDPC编码和译码，利用C语言编写，在matlab环境中画性能曲线。(Realize encoding and decoding of LDPC codes)

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说明：在实际的调谐解调电路中，采用的是非相干载波解调，本振信号与发射端的载波信号存在频率偏差和相位抖动，因而解调出来的模拟I、Q基带信号是带有载波误差的信号。这样的模拟基带信号即使采用定时准确的时钟进行取样判决，得到的数字信号也不是原来发射端的调制信号，误差的积累将导致抽样判决后的误码率增大，因此数字QPSK解调电路要对载波误差进行补偿，减少非相干载波解调带来的影响。(In the actual tuning and demodulating circuit, non-coherent carrier demodulation is adopted, and the frequency deviation and phase jitter of the local oscillator signal and the carrier signal of the transmitting end are present, and thus the demodulated analog I and Q baseband signals are signals with carrier error.)

2019-01-30 20:16:08下载

积分：1

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LFMdetection

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