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Description: 本文件是基于高斯正弦波行的宽带脉冲波形设计,保证了相对带宽大,衰减满足3db要求-this document is based on the Gaussian line broadband sinusoidal pulse waveform design, ensuring a relatively large bandwidth. attenuation meet the requirements Z
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Size: 56163 |
Author: 梁冰 |
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Description: 在无线网络的接收机端，对16进制的正交幅度调制信号进行软解调， 这种软解调方式比硬解调会提高2-3dB
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Size: 10197 |
Author: 白雪 |
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Description: 本文通过对JPEG图象压缩标准的分析，找到了一种解决这一问题的方法，即保边缘图象量化方法。在JPEG量化前，通过分析判断这一图象块是否为边缘所在块，对于边缘所在块采用较细的量化步长；对于其他块可使用较粗或者原始的量化步长进行量化，这样便可改善图象边缘处的质量。文中是利用了DCT
变换后的直流系数DC值来确定图象边缘块的，因为直流系数为这一图象块的平均亮度，如果相邻块的DC值变化较大，则它所包括的边缘细节就较多，否则说明这一图象块变化平缓，包含边缘少。根据DC值的变化我们可以大致决定这一块的量化因子，然后在量化时将边缘块进行较细的量化就可以很好的保护边缘，达到保边缘的目的。实验结果表明，与标准JPEG量化相比，采用本文方法进行量化可以提高图象峰值信噪比（PSNR）至少1～3dB，图象质量提高效果比较明显。
Platform: |
Size: 796318 |
Author: 贾殿鑫 |
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Description: EDFA的掺铒光纤长度模拟计算，附3篇相关论文，330mw的980nm泵浦，3db的泵浦吸收，12m最佳长度已经得到验证，可作为EDFA设计参考
Platform: |
Size: 428581 |
Author: 王磊 |
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Description: 本文件是基于高斯正弦波行的宽带脉冲波形设计,保证了相对带宽大,衰减满足3db要求-this document is based on the Gaussian line broadband sinusoidal pulse waveform design, ensuring a relatively large bandwidth. attenuation meet the requirements Z
Platform: |
Size: 56320 |
Author: 梁冰 |
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Description: 在无线网络的接收机端，对16进制的正交幅度调制信号进行软解调， 这种软解调方式比硬解调会提高2-3dB-Receiver in the wireless network client on the 16-band signal of the quadrature amplitude modulation demodulator soft, this soft than hard demodulation demodulator will increase 2-3dB
Platform: |
Size: 198656 |
Author: 白雪 |
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Description: 本文通过对JPEG图象压缩标准的分析，找到了一种解决这一问题的方法，即保边缘图象量化方法。在JPEG量化前，通过分析判断这一图象块是否为边缘所在块，对于边缘所在块采用较细的量化步长；对于其他块可使用较粗或者原始的量化步长进行量化，这样便可改善图象边缘处的质量。文中是利用了DCT
变换后的直流系数DC值来确定图象边缘块的，因为直流系数为这一图象块的平均亮度，如果相邻块的DC值变化较大，则它所包括的边缘细节就较多，否则说明这一图象块变化平缓，包含边缘少。根据DC值的变化我们可以大致决定这一块的量化因子，然后在量化时将边缘块进行较细的量化就可以很好的保护边缘，达到保边缘的目的。实验结果表明，与标准JPEG量化相比，采用本文方法进行量化可以提高图象峰值信噪比（PSNR）至少1～3dB，图象质量提高效果比较明显。
Platform: |
Size: 795648 |
Author: 贾殿鑫 |
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Description: EDFA的掺铒光纤长度模拟计算，附3篇相关论文，330mw的980nm泵浦，3db的泵浦吸收，12m最佳长度已经得到验证，可作为EDFA设计参考-EDFA erbium-doped fiber length of the simulation, with three related papers, 330mw of 980nm-pumped, 3db pump absorption, 12m in length has been proven the best can be used as reference EDFA design
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Size: 428032 |
Author: 王磊 |
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Description: 经典3d推箱子,日,好游戏,带源码,学游戏编程就靠它了,速度下载吧-Classic Sokoban 3d, Japan, and a good game, with source code, learning game programming relied on the speed to download it
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Size: 192512 |
Author: 小风 |
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Description: 编写一个函数，设计给定３ＤＢ点的ＩＩＲ滤波器，这样的方法简单方便-The preparation of a function, the design of a given 3DB point IIR filters, this method is simple and convenient
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Size: 6144 |
Author: 吴磊 |
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Description: 一种宽频带3dB环形电桥设计
本文讨论并设计了一种改进的 3dB宽频带环形电桥。采用在各引出臂上加四分之
一波长阻抗变换器，并将环分为特性阻抗不同的六段，使其带宽增宽，理论上带宽可以达到40％左右。并给出了微带型电桥的设计、仿真及实测结果。 -A wideband 3dB ring electric bridge design discussed in this paper and design an improved 3dB wideband annular bridge. Used in the extraction arm plus a quarter-wavelength impedance transformer, and the characteristic impedance loop is divided into six different to make it wider bandwidth, in theory, the bandwidth can reach around 40 . And give a microstrip-type electric bridge design, simulation and measured results.
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Size: 76800 |
Author: tinyuer |
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Description: 无线光通信；卷积交织；Viterbi并行译码
在误码率为10的负6次方
时，相对于最佳阈值
判决有约6.9dB的编码增益，与完美交织下的编码性能仅相差0.3dB-Wireless Optical Communication Convolutional Interleaver Viterbi decoding in parallel at the bit error rate of 10 negative 6 power when compared with the optimal threshold judgments about 6.9dB coding gain, with a perfect under-cutting is only a difference of 0.3 Coding performance dB
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Size: 145408 |
Author: 张同星 |
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Description: 编写MATLAB的M文件，用该文件对采用包络检测法解调的2ASK系统的抗噪声性能进行1000个符号的蒙特卡罗法仿真，画出误码率与信噪比之间的关系曲线，其中信噪比的取值为r＝0dB,2Db,4Db,6dB……10Db,同时画出误码率与信噪比的理论曲线，其中信噪比的取值为r＝0dB,0.1dB,0.2dB,0.3dB……10Db-The preparation of MATLAB M-file, use the document on the use of envelope detection demodulation system 2ASK anti-noise performance of the 1000 Monte Carlo Simulation of symbols, drawn between error rate and signal to noise ratio curve, which SNR value for r = 0dB, 2Db, 4Db, 6dB ... ... 10Db, bit error rate at the same time draw the theoretical curve with the signal to noise ratio, signal to noise ratio value for one of r = 0dB, 0.1dB, 0.2dB , 0.3dB ... ... 10Db
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Size: 1024 |
Author: 阿宾 |
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Description: 1）设计Butterworth型音频抗混叠滤波器；
2）参数：
下通带频率300Hz；上通带频率3400Hz；
下阻带频率280Hz；上阻带频率3600Hz；
通带最大衰减0.3dB；
阻带最小衰减40dB；
3）采用一低通滤波器和一高通滤波器级联；
4）分别确定LPF和HPF的性能指标；
5）求出两滤波器的系统函数和频率响应，并画出其幅频特性曲线；
6）求整个滤波器的系统函数和频率响应，并画出其幅频特性曲线。-1) the design of Butterworth-type audio anti-aliasing filter 2) parameters: passband frequency of 300Hz on pass-band frequency 3400Hz under the stop-band frequency of 280Hz on stop-band frequency 3600Hz passband maximum attenuation of 0.3dB minimum stopband attenuation of 40dB 3) the use of a low-pass filter and a high-pass filter cascade 4) separately to determine the performance of LPF and HPF target 5) to derive two-filter system function and frequency response, and draw its increase frequency characteristic curve 6) for the entire filter system function and frequency response, and draw its amplitude-frequency characteristic curve.
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Size: 15360 |
Author: hsf |
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Description: fp=2400hz,fs=5000hz,rp=3db,rs=25db.求其3dB时的各项参数！-fp = 2400hz, fs = 5000hz, rp = 3db, rs = 25db. for its 3dB at the time of the parameters!
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Size: 1024 |
Author: 王寅涛 |
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Description: 椭圆滤波器，fp=2400hz,fs=5000hz,rp=3dB,rs=25dB,求其3dB时的各项参数！-Elliptic filter, fp = 2400hz, fs = 5000hz, rp = 3dB, rs = 25dB, for its 3dB at the time of the parameters!
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Size: 1024 |
Author: 王寅涛 |
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Description: 已知一低通滤波器的采样率为2KHz，通带为500Hz，阻带为600 Hz，带内波动3dB，带外衰减-50dB，滤波器的相位具有线性特性，具体幅频特性见下图。要求用等波纹方法设计出该FIR滤波器，然后用TMS320C54x汇编语言编程，并在CCS下调试实现该FIR滤波器。-A low-pass filter known to the sampling rate of 2KHz, passband to 500Hz, stopband to 600 Hz, with fluctuations within 3dB,-band attenuation of-50dB, with a linear phase filter characteristics, amplitude-frequency characteristic specific see Fig. Request method, such as corrugated design of the FIR filter, and then use the TMS320C54x assembly language programming and debugging in CCS to achieve the FIR filter.
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Size: 28672 |
Author: iechshy1985 |
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Description: We have to design a second order Butterworth filter having a sampling frequency of 20 kHz and -3db cut of frequency at 2 kHz in visual C. Only low frequency signals can pass through this filter and the signals having the frequency higher than frequency called cut off frequency get attenuated by this filter. we will use bilinear transform which is one of the most efficient way of converting a analogue filter to digital filter, we will convert the given transfer function from Laplace transform to z-transform and then we will realize poles and zeroes in the z-domain. And their corresponding frequency response.-We have to design a second order Butterworth filter having a sampling frequency of 20 kHz and-3db cut of frequency at 2 kHz in visual C. Only low frequency signals can pass through this filter and the signals having the frequency higher than frequency called cut off frequency get attenuated by this filter. we will use bilinear transform which is one of the most efficient way of converting a analogue filter to digital filter, we will convert the given transfer function from Laplace transform to z-transform and then we will realize poles and zeroes in the z-domain. And their corresponding frequency response.
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Size: 447488 |
Author: Mak_m |
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Description: 音频ADC前端电路，20－20kHz 3dB带宽，可自行电压调节偏置与增益。-Audio ADC front-end circuit ,20-20kHz 3dB bandwidth, self-bias and voltage regulator gain.
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Size: 6144 |
Author: zhuyi |
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Description: 使用matlab通过微弯波导和直波导耦合设计一个3db耦合器-Through the use of matlab Microbend waveguide and the straight waveguide coupled design a 3db coupler
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Size: 27648 |
Author: 张明琼 |
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