Description: 转差频率矢量控制系统的Simulink仿真模拟。电流滞环跟踪型PWM控制逆变电路。-Slip frequency vector control system Simulink simulation. Hysteresis current tracking type PWM inverter control circuit. Platform: |
Size: 15360 |
Author:杨柳 |
Hits:
Description: The problem of channel equalization via channel
identification (CEQCID) that has previously been considered by a
handful of researchers is explored further. An efficient algorithm
for mapping the channel parameters to the equalizers coeficients
is proposed. The proposed scheme is compared with a lattice
least squares (LS) based receivers. For the particular application
of the high frequency (HF) radio channels, we find that the
CEQCID has lower computational complexity. In terms of the
tracking performance, also, the CEQCID has been found to be
superior to the LS based receivers [4]. We emphasize on the
implementation of a fractionally tap-spaced decision feedback
equalizer (DFE) and compare that with the T-spaced DFE of
[4]. We show that the former is a better choice for the multipath
HF channel-The problem of channel equalization via channel
identification (CEQCID) that has previously been considered by a
handful of researchers is explored further. An efficient algorithm
for mapping the channel parameters to the equalizers coeficients
is proposed. The proposed scheme is compared with a lattice
least squares (LS) based receivers. For the particular application
of the high frequency (HF) radio channels, we find that the
CEQCID has lower computational complexity. In terms of the
tracking performance, also, the CEQCID has been found to be
superior to the LS based receivers [4]. We emphasize on the
implementation of a fractionally tap-spaced decision feedback
equalizer (DFE) and compare that with the T-spaced DFE of
[4]. We show that the former is a better choice for the multipath
HF channel Platform: |
Size: 420864 |
Author:hamed |
Hits:
Description: 基于自建数据库的音乐识别及检索软件 ；
利用Matlab开发软件, 通过抓取录入歌曲的音高(pitch tracking)绘出声音的频率变化并进行降噪和润滑（smoothing）处理
与数据库中歌曲的频率变化图比对，计算出相似度top10的歌曲并显示。
-Based on self-built of music recognition and retrieval software developed using Matlab software, change the pitch of a song by crawling entry (pitch tracking) plots the frequency of the sound and noise reduction and lubrication (smoothing) processing
Frequency changes in the diagram songs than calculate the similarity top10 songs and displayed. Platform: |
Size: 44032 |
Author:wangyuntuo |
Hits:
Description: 噪声谱估计+谱减法，主要用于对比不同噪声谱估计算法的性能，包括Martin s minimum tracking algorithm，Minimum controlled recursive average algorithm (Cohen) ，variant of Minimum controlled recursive average algorithm ，improved Minimum controlled recursive average algorithm (Cohen)，continuous spectral minimum tracking (Doblinger)，weighted spectral average (Hirsch & Ehrilcher)，connected frequency regions (Sorensen & Andersen)。详见里面readme.txt-Ppls spectral subtraction noise spectrum estimation, mainly used to compare the performance of different noise spectrum estimation algorithms, including Martin' s minimum tracking algorithm, Minimum controlled recursive average algorithm (Cohen), variant of Minimum controlled recursive average algorithm, improved Minimum controlled recursive average algorithm (Cohen ), continuous spectral minimum tracking (Doblinger), weighted spectral average (Hirsch & Ehrilcher), connected frequency regions (Sorensen & Andersen). See readme.txt inside Platform: |
Size: 81920 |
Author:冯大航 |
Hits:
Description: 采用单片机PIC16F877A 编写的基于串联谐振主回路的感应加热程序，实现对谐振频率的自动跟踪，已经过阻性负载和感性负载实验，实验结果良好。-Based on written using PIC16F877A microcontroller series resonant circuit induction heating main program, automatic tracking of the resonance frequency has been resistive load and inductive load experiments, good results. Platform: |
Size: 3072 |
Author:lihao |
Hits:
Description: Abstract—Several algorithms have been developed for tracking
formant frequency trajectories of speech signals, however most of
these algorithms are either not robust in real-life noise environments
or are not suitable for real-time implementation. The algorithm
presented in this paper obtains formant frequency estimates
voiced segments of continuous speech by using a time-varying
adaptive filterbank to track individual formant frequencies. The
formant tracker incorporates an adaptive voicing detector and a
gender detector for formant extraction continuous speech,
for both male and female speakers. The algorithm has a low signal
delay and provides smooth and accurate estimates for the first four
formant frequencies at moderate and high signal-to-noise ratios.
Thorough testing of the algorithm has shown that it is robust over
a wide range of signal-to-noise ratios for various types of background
noises.-Abstract—Several algorithms have been developed for tracking
formant frequency trajectories of speech signals, however most of
these algorithms are either not robust in real-life noise environments
or are not suitable for real-time implementation. The algorithm
presented in this paper obtains formant frequency estimates
voiced segments of continuous speech by using a time-varying
adaptive filterbank to track individual formant frequencies. The
formant tracker incorporates an adaptive voicing detector and a
gender detector for formant extraction continuous speech,
for both male and female speakers. The algorithm has a low signal
delay and provides smooth and accurate estimates for the first four
formant frequencies at moderate and high signal-to-noise ratios.
Thorough testing of the algorithm has shown that it is robust over
a wide range of signal-to-noise ratios for various types of background
noises. Platform: |
Size: 67584 |
Author:assouma |
Hits:
Description: Remote Low Frequency State Feedback Kinematic Motion Control for
Mobile Robot Trajectory Tracking Platform: |
Size: 520192 |
Author:hussein |
Hits:
Description: 对DQPSK调制解调技术的FPGA实现进行了比较全面的研究，利用nQpSK调制技术实现了码速20oKbps的调制器。调制载频3.2MHz、带宽18oKHz、带外抑制大于45dB，调制器设计达到预定要求。解调器硬件完成，软件未全部实现，但完成了CIC滤波器、载波跟踪环、位定时同步、并串转换等几个关键模块的设计。对解调器做了实验测试，验证了相关模块设计的正确性，解调器中重要的载波同步功能己能实现-DQPSK modulation and demodulation techniques for FPGA implementation of a more comprehensive study conducted by nQpSK modulation technique to achieve a code rate 20oKbps modulator. Modulated carrier frequency 3.2MHz, bandwidth 18oKHz, band rejection greater than 45dB, modulator design reaches the predetermined requirements. Demodulator hardware, the software is not fully realized, but the completion of the CIC filter, carrier tracking loop, bit timing synchronization, and converts the string design, and several other key modules. Demodulator do laboratory tests to verify the correctness of the design related modules, an important carrier demodulator synchronization has been able to achieve Platform: |
Size: 8906752 |
Author:lvhenan |
Hits:
Description: 锁相环就是锁定相位的环路。学过自动控制原理的人都知道，这是一种典型的反馈控制电路，利用外部输入的参考信号控制环路内部振荡信号的频率和相位，实现输出信号频率对输入信号频率的自动跟踪，一般用于闭环跟踪电路。-Locked loop (phase), as the name implies, is the lock phase of the loop. Principle of automatic control of the people know, this is a typical feedback control circuit, the external input reference signal control the frequency and the phase of the oscillation signal inside the loop, the frequency of the output signal of the input signal frequency automatic tracking, generally used for closed-loop tracking circuit.
Platform: |
Size: 272384 |
Author: |
Hits:
Description: 接收端采用的算法和程序流程与发送端发送的OFDM符号的帧结构有关系。具体的帧结构，以及定时估计，频偏估计，剩余误差跟踪的算法可参考算法说明文档。这里对程序的流程进行说明。
首先根据短训练字的特性进行相关运算，进行信号到达检测，当检测到相关值大于门限一定次数后，认为有信号到达。然后根据长训练字的特性，进行相关运算，进行OFDM符号FFT窗口起始位置的估计。估计出FFT窗口的位置后，先在时域进行小频偏的估计，将两个长训练字进行小频偏补偿后，进行FFT运算，根据FFT运算的结果进行整数倍频偏的估计。这些参数估计完成后，就可以进行数据解调了。先对数据部分进行完整的频偏补偿，然后根据估计的FFT窗口位置进行FFT运算得到频域的数据，进行解调。然后在对应于导频的子载波位置上提取出导频信息，根据导频信息估计出剩余定时误差以及剩余的信道响应误差，将误差量送入环路进行跟踪。当收到所有数据后，重新回到信号到达检测状态，进行下一次信号到达的检测和信号接收。
-The receiving end uses the algorithm and the program flow and the frame structure of the OFDM symbol transmitted by the sending end. Specific frame structure, and timing estimation, frequency offset estimation, residual error tracking algorithm can refer to the documentation. Here to illustrate the process of the program.
First, according to the characteristics of the short training word correlation operation, the signal reaches the detection, when the correlation value is greater than the threshold of a certain number of times, that there is a signal to reach. Then, according to the characteristics of the long training word, the correlation operation is carried out, and the initial position of the OFDM symbol FFT is estimated. The estimated position of the FFT window, first in the time domain for small frequency offset estimation, two long training word for small frequency offset compensation, the FFT operation. According to the result of FFT for integer frequency bias estimation. Af Platform: |
Size: 34816 |
Author:shinfer |
Hits:
Description: Phase Locked Loops (PLL)
Introduction to PLL
The concept of Phase Locked Loops (PLL) first emerged in the early 1930’s.But the technology was not developed as it now, the cost factor for developing this technology was very high. Since the advancement in the field of integrated circuits, PLL has become one of the main building blocks in the electronics technology. In present, the PLL is available as a single IC in the SE/NE560 series (560, 561, 562, 564, 565 and 567) to further reduce the buying cost ,the discrete IC’s are used to construct a PLL.
PLL Applications
Frequency Modulation (FM) stereo decoders, FM Demodulation networks for FM operation.
Frequency synthesis that provides multiple of a reference signal frequency.
Used in motorspeed controls, tracking filters.
Used in frequency shift keying (FSK) decodes for demodulation carrier frequencies. Platform: |
Size: 13312 |
Author:sabir ouchen |
Hits:
Description: 用于对产生的pwm波形进行参数分析，能够实时更新频率，跟踪参数变化量-Used to generate the PWM waveform parameter analysis, to be able to update the frequency of real-time tracking parameters change Platform: |
Size: 1161216 |
Author:杨建廷 |
Hits:
Description: FMCW调频连续波雷达的测距测角，各种资源分配算法实现，是本科毕设的题目，多目标跟踪的粒子滤波器，是学习PCA特征提取的很好的学习资料，合成孔径雷达（SAR)目标成像仿真。-FMCW frequency modulated continuous wave radar range and angular measurements, Various resource allocation algorithm, The title of the commercial is undergraduate course you Multi-target tracking particle filter, Is a good learning materials to learn PCA feature extraction, Synthetic Aperture Radar (SAR) imaging simulation target. Platform: |
Size: 9216 |
Author:pymxcx |
Hits:
Description: 本科毕设要求参见标准测试模型，部分实现了追踪测速迭代松弛算法，FMCW调频连续波雷达的测距测角，MIMO OFDM matlab仿真,有均匀线阵的CRB曲线，基于分段非线性权重值的Pso算法。-Undergraduate complete set requirements refer to the standard test models, Partially achieved tracking speed iterative relaxation algorithm, FMCW frequency modulated continuous wave radar range and angular measurements, MIMO OFDM matlab simulation, There ULA CRB curve, Based on piecewise nonlinear weight value Pso algorithm. Platform: |
Size: 7168 |
Author:pvzcpn |
Hits:
Description: 可以得到很精确的幅值、频率、相位估计，一个很有用的程序，旋转机械二维全息谱计算，一些自适应信号处理的算法，供做算法研究人员参考，部分实现了追踪测速迭代松弛算法。- You can get a very accurate amplitude, frequency, phase estimation, A very useful program, Rotating machinery 2-d holographic spectrum calculation, Some adaptive signal processing algorithms, Algorithm for researchers to do reference, Partially achieved tracking speed iterative relaxation algorithm. Platform: |
Size: 10240 |
Author:pkqgzh |
Hits:
Description: 多目标跟踪的粒子滤波器，从先验概率中采样，计算权重，分析了该信号的时域、频域、倒谱，循环谱等,车牌识别定位程序的部分功能，重要参数的提取，最小均方误差（MMSE）的算法。- Multi-target tracking particle filter, Sampling a priori probability, calculate the weight, Analysis of the signal time domain, frequency domain, cepstrum, cyclic spectrum, etc. Part of the license plate recognition locator feature, Extract important parameters, Minimum mean square error (MMSE) algorithm. Platform: |
Size: 7168 |
Author:hkwqyi |
Hits:
Description: 包括调制，解调，信噪比计算，加入重复控制，各种资源分配算法实现，研究生时的现代信号处理的作业，分析了该信号的时域、频域、倒谱，循环谱等,多目标跟踪的粒子滤波器。- Includes the modulation, demodulation, signal to noise ratio calculation, Join repetitive control, Various resource allocation algorithm, Modern signal processing jobs when the graduate, Analysis of the signal time domain, frequency domain, cepstrum, cyclic spectrum, etc. Multi-target tracking particle filter. Platform: |
Size: 6144 |
Author:vinpft |
Hits:
Search - frequency tracking