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indi
Orthogonal Frequency Division Multiplexing (OFDM) is a spectrally efficient multicarrier modulation technique for high speed data transmission over multipath fading channels. High Peak-to-Average Power Ratio (PAPR), which leads to power inefficiency in the RF portion of the transmitter, is a major drawback of OFDM.
- 2010-09-20 11:33:41下载
- 积分：1
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bpsk
bpsk调制，用MATLAB进行bpsk调制。(bpsk modulation, modulation bpsk to use MATLAB.)
- 2009-04-28 19:31:29下载
- 积分：1
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ANN-in-maneuvering-target-tracking
在机动目标跟踪中，机动目标模型是机动目标跟踪的基本要素之一，一般希望机动目标模型能准确表征目标机动时的各种运动状态。比较常用的模型有匀速运动(CV)模型、匀加速运动(CA) 模型、时间相关模型（Singer）和机动目标“当前”统计模型。上述模型均采用机动频率表征目标的机动情况。在应用当中，通常采用固定的机动频率，这就表示机动目标的机动时间是一定的，而实际上机动目标的机动时间是不断变化的，也就是说机动频率是不断变化的，采用固定机动频率必然会带来误差。采样周期在0.5—2S时，机动频率越小跟踪精度越高[1]，但机动频率仍然是固定值。本文提出的基于神经网络的机动频率自适应调整方法可以使机动频率随机动而变化，从而提高状态估计的准确性，提高跟踪精度。本文将小波神经网络用于机动目标跟踪中机动频率的自适应调整，该算法对机动目标“当前”统计模型中的机动频率进行实时修改, 从而自适应的改变机动频率,使跟踪算法与目标的真实状态更接近。该算法采用小波神经网络的离线训练，实时性好。(The maneuver of the maneuvering target is uncertain. The maneuvering frequency is constantly changeable, but traditionally it is beforehand determined as a constant based on the target state estimation in the state model of the maneuvering target. The maneuver of the maneuvering target makes the kinematics equation of the target model mismatch with the practical motion model and the tracking error will be increased. Based on the advantages of the self-learning, the rapid convergence rate and the nonlinear approximation ability of the wavelet neural network, it was put forward to be used in the field of target tracking in the paper. The new residual is used as the input of the wavelet neural network, the output of the network is used to adjust adaptively the maneuvering frequency of the CS model. The algorithm is more close to the real state of the target. The simulation results showed that tracking error can be reduced and the tracking accuracy can be improved.)
- 2009-12-19 07:11:54下载
- 积分：1
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1
说明： 这个程序主要的功能是实现了基于特征空间法的静态最小二乘恒模算法的方向图(This program is the main function realization based on feature space method static least-squares constant modulus algorithm direction map)
- 2012-04-19 11:29:05下载
- 积分：1
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functions-for-matlab
里面包括常用的MATLAB 图像函数，十分符合新手(Which include the popular image of MATLAB functions, is in line with novice)
- 2011-09-16 23:14:28下载
- 积分：1
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dynamic-spectrum-access
在认知无线电中，频谱感知频谱分配是两个主要问题，而动态频谱接入是理解频谱感知的关键。(In CR, spectrum sensing and spectrum allocation is the major problem, but the dynamic spectrum access is the key to understand spectrum sensing.)
- 2013-04-26 21:01:04下载
- 积分：1
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gaot
tep 1：对遗传算法的运行参数进行赋值。参数包括种群规模、变量个数、交叉概率、变异概
率以及遗传运算的终止进化代数。
Step 2：建立区域描述器。根据轨道交通与常规公交运营协调模型的求解变量的约束条件，设
置变量的取值范围。
Step 3：在Step 2的变量取值范围内，随机产生初始群体，代入适应度函数计算其适应度值。
Step 4：执行比例选择算子进行选择操作。
Step 5：按交叉概率对交叉算子执行交叉操作。
Step 6：按变异概率执行离散变异操作。
Step 7：计算Step 6得到局部最优解中每个个体的适应值，并执行最优个体保存策略。
Step 8：判断是否满足遗传运算的终止进化代数，不满足则返回Step 4，满足则输出运算结果。
其次，运用遗传算法工具箱。(Matlab genetic algorithm toolbox)
- 2020-11-07 15:09:49下载
- 积分：1
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CPS
MMC半桥模块，含六个子模块-七电平逆变器。(MMC, 6 submodules, half-bridge, converter)
- 2021-04-19 21:58:51下载
- 积分：1
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qaryLDPC
说明： 关于多进制LDPC码的编译码的matlab代码(Ary LDPC codes on the coding and decoding of the matlab code)
- 2010-04-25 13:06:12下载
- 积分：1
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SingleFreqCancel
噪声对消源程序，大家可以借鉴一下，还是比较容易看懂(noise cancellation source, we can learn from this, is still relatively easy to understand)
- 2007-01-22 14:24:43下载
- 积分：1
