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用Welch法进行功率谱估计
考虑L的三个不同值：L＝256（3个数据段），L＝128(7个数据段)和L=64（15个数据段）。各自的谱估计图如上图所示。可以明显的看到，加窗明显的减小了频谱上的假谱峰，但也更加进一步平滑了谱峰。所以，对于L＝64的情况，在ω＝0.8π的谱线可以很确定的辨认，但是那两个靠近的谱峰不容易区分。对于L＝128的情况，这种情况提供了在分离和检测间最好的均衡。当然，对于在L＝256时的情况，效果是更好的，能够从谱估计图上明显的分辨出三条谱线的存在以及它们幅度关系的强弱。 除了Welch法外，还可以采用对多个周期图求平均的功率谱估计方法的其他方法如Bartlett法等等，在功率谱估计上也能取得较好的结果。(consider three different values : L = 256 (3 data), L = 128 (7 data) and L = 64 (15 data). Their spectral estimation map as shown in Fig. It is clear to see that increase significantly decreasing window of the spectrum of false peaks, but much more to further smooth the peaks. Therefore, L = 64, in the case = 0.8 spectrum can determine the identification, but that the two peaks around is not easy to distinguish. L = 128 for the situation, which provided the separation and detection among the best balanced. Of course, L = 256 in the case, the effect is better, from the spectral estimation map clearly distinguish between the three lines of the existence and their relationship to the rate of strength. In addition to Welch law, but also can be used to map multiple cycle for the average power)
- 2005-07-12 11:18:13下载
- 积分：1
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LDPC_BP_decode
LDPC编解码的源程序，可以在MATLAB中成功运行(LDPC codec source code, you can successfully run in MATLAB)
- 2008-07-24 14:56:01下载
- 积分：1
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RBF
RBF故障诊断，实现针对多种故障的模式识别(RBF fault diagnosis)
- 2012-04-17 14:41:18下载
- 积分：1
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DS-and-matlab
直扩频通信中的伪码仿真及其matlab仿真(Direct Spread Spectrum Simulation and matlab simulation of pseudo code)
- 2011-05-31 11:13:21下载
- 积分：1
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LLREXM
LLR仿真 157循环编码 llr译码 BPSK信号高斯噪声(LLR 157 loop simulation BPSK signal decoding coded llr Gaussian noise)
- 2013-05-26 10:27:17下载
- 积分：1
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minBFGS
求极小值，最优化方法的一个matlab范例(Seek the minimum value, a Matlab example of optimization methods)
- 2012-05-31 20:41:31下载
- 积分：1
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gravity_tides
计算指定位置的固体潮,并绘制固体潮的时变曲线(calculate gravity tides)
- 2015-03-03 09:58:29下载
- 积分：1
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liuweixiuzhen
用于六维外弹道的计算,可以计算六自由度的外弹道(using for 6 dof blastic)
- 2021-03-09 22:59:27下载
- 积分：1
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xiaobofenjiechonggou
文章涉及了小波一维小波分解和重构的MATLAB程序，程序相当有借鉴意义。(Articles related to the wavelet one-dimensional wavelet decomposition and reconstruction of MATLAB program, the program quite a reference.)
- 2010-06-13 11:02:25下载
- 积分：1
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1.m
说明： 基于MATLAB中多径非时变信道仿真与分析，可以实现以下简单信道模型的测试！(MATLAB-based non-time-varying multipath channel simulation and analysis, you can achieve the following simple channel model of the test!)
- 2010-04-29 10:32:51下载
- 积分：1
