Description: generation of wideband high dynamic range analog signal for area-efficient MADBIST, especially for the on-chip testing of wireless communication IF digitizing sigma–delta modulator chip. Via increasing the order of the one-bit bandpass sigma–delta modulation algorithm up to 12 and using finite repetitious bitstream approximating scheme, it can achieve great improvements in signal bandwidth instead of purity at the cost of very little hardware overhead. Another contribution in this work is to provide the theoretical analysis of the reconstructed signal degradation due to harmonic distortion and clock jitter. Such on-chip analog stimulus generation scheme is especially fit for IF digitizing bandpass sigma–delta modulator chip s production-time testing and in-the-field diagnostics. The technique can also be extended to mixed-signal communication SoC built-in-self-test.- generation of wideband and high dynamic range analog signal for area-efficient MADBIST, especially for the on-chip testing of wireless communication IF digitizing sigma–delta modulator chip. Via increasing the order of the one-bit bandpass sigma–delta modulation algorithm up to 12 and using finite repetitious bitstream approximating scheme, it can achieve great improvements in signal bandwidth instead of purity at the cost of very little hardware overhead. Another contribution in this work is to provide the theoretical analysis of the reconstructed signal degradation due to harmonic distortion and clock jitter. Such on-chip analog stimulus generation scheme is especially fit for IF digitizing bandpass sigma–delta modulator chip s production-time testing and in-the-field diagnostics. The technique can also be extended to mixed-signal communication SoC built-in-self-test. Platform: |
Size: 5120 |
Author:Nupur Naik |
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Description: 在状态转移规则的基础上，局部更新规则和全局更新的蚁群算法的规则，我们提出一个IM证明蚂蚁的最低成本的服务质量蚁群算法（QoS）的路径用于解决网络路由问题与延迟以及背包约束中进行模拟。约52.33％蚂蚁找到成功的QoS路由。并收敛到最佳。-based on the state transition rule，the local updating rule and the global updating rule of ant colony algorithm ，we propose an im proved ant colony algorithm of the least cost quality of service(QoS)unicast routing．The algorithm is used for solving the routing problem with delay．delay jitter．bandwidth，and packet lOSS constrained． In the simulation，about 52．33 ants find the Successful QoS routing ．and converge to the best． It is proved that the algorithm is efficient and effective． Platform: |
Size: 176128 |
Author:lifei |
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Description: 设计一完整的移动通信系统物理层传输方案
(WiMAX场景)：
试设计一完整的移动通信系统物理层传输方案并用MATLAB程序实现，要求满足以下指标：
1. 数据速率：5km/hr的移动速度下可实现60Mbps，同时在120km/hr的移动速度下可实现10Mbps，且Eb/No小于20dB时可实现误比特率Pe <= 10-4
2. 信号带宽为20MHz，工作在2GHz频带
3. 信道模型: COST207模型的6径瑞利信道(可参考程序 multipath_code.zip)
请给出以下结果：
A．收发机结构框图，主要参数设定；
B．
误比特率仿真曲线。(考虑非理想同步和信道估计)；-Design a complete system for mobile communications physical layer transmission scheme (WiMAX scene): try to design a complete system for mobile communications and physical layer transmission scheme to achieve with the MATLAB program, requires the following indicators: 1. Data rate: 5km/hr mobile speed can achieve 60Mbps, while the movement in the 120km/hr speed can achieve 10Mbps, and Eb/No less than 20dB can be achieved when the bit error rate Pe < = 10-4 2. signal bandwidth of 20MHz, the work in the 2GHz band 3. channel Model: COST207 model 6 path Rayleigh channel (refer to program multipath_code.zip) Please give the following results: A. Transceiver block diagram, the main parameter settings B. BER simulation curves. (Taking into account non-ideal synchronization and channel estimation) Platform: |
Size: 5120 |
Author:wangjiayin |
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Description: 随着信息容量的增加和频率资源的稀缺，为提高单位频带利用率，在微波通信系统中越来越多地采用多电平多相位的复杂信号调制方式，尤其是正交幅度调制(QAM)得到了大量的应用，从早期的4QAM到今天的16QAM。高阶QAM调制大容量数字微波通信系统为了保证服务质量，降低误码率，-long with the increase of information capacity and frequency resource scarcity, for improving the utilization ratio, unit of microwave communication bandwidth used more and more in the system of multilevel much phase modulation method complex signal amplitude modulation Platform: |
Size: 629760 |
Author:蒋梦琪 |
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Description: 这里是通信领域中各种基带信号（非常全，几乎最新的都有），用matlab编写，给出了相应的带宽和功率谱密度，很值得学习通信的-Here are the various communications baseband signal (very full, almost all the latest), written with matlab, the corresponding bandwidth and power spectral density, it is worth learning to see communication Platform: |
Size: 96256 |
Author:littlesky |
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Description: Video summarization refers to creating a summary of a video. Medical examinations like endoscopy and bronchoscopy lasts more than 20 minutes .The doctor may not have sufficient time to watch the entire video or the whole of video content may not be of interest to the examiner. Sometimes the medical video has to be sent to a specialist who is located at a distant place. In such cases, the doctor may just want to view the summary of the video instead of watching the whole video. Thus , the summary should be such that it should convey as much information about the occurrence of various incidents in the video.
Video summarization plays an important role in efficient storage, quick browsing and retri of large collection of video data without losing important aspects. It also reduces transmission bandwidth efficiently when need arises. Efficient summarization of video recordings of bronchoscopic and endoscopic procedures is also highly relevant for the development of medical video libraries.
Video summarization refers to creating a summary of a video. Medical examinations like endoscopy and bronchoscopy lasts more than 20 minutes .The doctor may not have sufficient time to watch the entire video or the whole of video content may not be of interest to the examiner. Sometimes the medical video has to be sent to a specialist who is located at a distant place. In such cases, the doctor may just want to view the summary of the video instead of watching the whole video. Thus , the summary should be such that it should convey as much information about the occurrence of various incidents in the video.
Video summarization plays an important role in efficient storage, quick browsing and retri of large collection of video data without losing important aspects. It also reduces transmission bandwidth efficiently when need arises. Efficient summarization of video recordings of bronchoscopic and endoscopic procedures is also highly relevant for the development of medical video libraries.
-n refers to creating a summary of a video. Medical examinations like endoscopy and bronchoscopy lasts more than 20 minutes .The doctor may not have sufficient time to watch the entire video or the whole of video content may not be of interest to the examiner. Sometimes the medical video has to be sent to a specialist who is located at a distant place. In such cases, the doctor may just want to view the summary of the video instead of watching the whole video. Thus , the summary should be such that it should convey as much information about the occurrence of various incidents in the video.
Video summarization plays an important role in efficient storage, quick browsing and retri of large collection of video data without losing important aspects. It also reduces transmission bandwidth efficiently when need arises. Efficient summarization of video recordings of bronchoscopic and endoscopic procedures is also highly relevant for the development of medical video libraries.
Platform: |
Size: 1024 |
Author:Savi |
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Description: 已知一个连续时间信号 ， ，取最高有限带宽频率 。分别显示原连续时间信号波形和 三种情况下抽样信号波形，并尝试用内插公式重建原信号。-A continuous time signals, known, take the highest frequency of limited bandwidth. Respectively according to the original continuous time signal waveform and the sampling signal waveform, the three situations and try to reconstruct the original signal with interpolation formula. Platform: |
Size: 24576 |
Author:张亚利 |
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Description: 1、验证窗函数 N 变化时，验证其频谱主瓣副瓣比、主瓣宽度的变化。
a)矩形窗函数的 N 变化时，验证其其频谱主瓣副瓣幅度比基本不会发生变化，
而主瓣宽度将会变窄。这说明，当用矩形窗函数设计滤波器时，增大 N 不能使
得阻带衰减减小，但能够减小过渡带。
b)再选取其他的窗如 hamming/hanning 窗，验证当 N 变化时，其频谱主瓣宽
度变化、主瓣副瓣比值变化情况。
2、用窗函数法设计线性相位 FIR 低通，通带截止频率 wp=0.5PI, 阻带截止频率 ws=0.6PI,
阻带衰减不小于 40dB,通带衰减不大于 3dB.
a)选取 Hanning,Hamming 窗查看设计出来的 FIR 的过渡带宽和阻带衰减是否
满足要求，二者有什么不同。
b)使用 hamming 窗，将窗长增大 1 倍，设计 FIR。验证同样的窗函数类型
(hamming)，不同窗长度时，设计出来的 FIR 的过渡带宽和阻带衰减都有什么变
化。
3、不使用 Matlab 系统函数得到上一项指标的低通，并与上一项结果比较。
4 用窗函数法设计线性相位 FIR 高通，通带截止频率 wp=0.8PI, 阻带截止频率
ws=0.7PI, 阻带衰减不小于 30dB,通带衰减不大于 3dB.(An actual filter is implemented using the truncated unit impulse response sequence of the ideal filter.
For the ideal low pass filter, the unit impulse response h, N, D () is intercepted by a length of N, and the length is
The N sequence H (n), when intercepted, guarantees causality and linear phase requirements for the filter.
In order to reduce the Gibbs effect, the H (n) window is added, and the appropriate window function is selected to ensure the stopband attenuation and
Transition zone requirement. Note that the sidelobe of the window function affects the stopband attenuation of the filter, and the main lobe width affects the filter
Transition bandwidth.) Platform: |
Size: 3072 |
Author:花祭嘉音
|
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Description: A key consequence of the usual double-sideband amplitude modulation (AM) is that the range of frequencies the signal spans (its spectral bandwidth) is doubled. Thus, the RF bandwidth of a signal (measured from the lowest frequency as opposed to 0 Hz) is twice its baseband bandwidth. Platform: |
Size: 324608 |
Author:Khan17
|
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Description: 匹配滤波压缩程序，40MHz带宽，最终以仿真图形式(The matched filtering compression program, 40MHz bandwidth, is finally modeled in the form of a simulation) Platform: |
Size: 19456 |
Author:sugary
|
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Description: Its size being small and security being high characterizes it.
ECC is appropriate in the environments where processing
power, storage, bandwidth or power ingestion is controlled Platform: |
Size: 24373248 |
Author:saranya
|
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Description: 扩频通信就是带宽换取增益的一种通信形式，这个一个有关扩频通信的实验(Spread spectrum communication is a form of communication that bandwidth is exchanged for gain. This is an experiment about spread spectrum communication.) Platform: |
Size: 153600 |
Author:Domino_CDMA |
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Search - BANDWIDTH matlab