Description: This project aim was to build wireless software modem for data communication
between two computers using an acoustic interface in the voice frequency range (20Hz–
20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz –
20,000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz –
16,000Hz). The test files used as information files were text files.
This goal was attained both in an incoherent scheme and in a coherent scheme.
Build under Matlab code, our modem uses OFDM (orthogonal frequency division
multiplexing) modulation, synchronization by LMS sequence, channel estimation (no
equalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of
2 or 4. To optimize the probability of error, these symbols were mapped using Gray
mapping.
Report Platform: |
Size: 559541 |
Author:buyop |
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Description: This project aim was to build wireless software modem for data communication
between two computers using an acoustic interface in the voice frequency range (20Hz–
20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz –
20,000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz –
16,000Hz). The test files used as information files were text files.
This goal was attained both in an incoherent scheme and in a coherent scheme.
Build under Matlab code, our modem uses OFDM (orthogonal frequency division
multiplexing) modulation, synchronization by LMS sequence, channel estimation (no
equalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of
2 or 4. To optimize the probability of error, these symbols were mapped using Gray
mapping.
Report-This project aim was to build wireless software modem for data communicationbetween two computers using an acoustic interface in the voice frequency range (20Hz-20000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz-20000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz-16000Hz). The test files used as information files were text files.This goal was attained both in an incoherent scheme and in a coherent scheme.Build under Matlab code, our modem uses OFDM ( orthogonal frequency divisionmultiplexing) modulation, synchronization by LMS sequence, channel estimation (noequalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of2 or 4. To optimize the probability of error, these symbols were mapped using Graymapping.Report Platform: |
Size: 559104 |
Author: |
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Description: MIMO-SDMA操作技術最佳化的實現,由權重自動搜尋想要的方向和自動消除零點,可用MATLAB軟體獲得驗證.-MIMO-SDMA technique to optimize the realization of the weights from the direction you want to automatically search and automatic elimination of zero, can be used MATLAB software to obtain verification. Platform: |
Size: 354304 |
Author:陳敏 |
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Description: 为大型相控阵天线真面进行调整优化，是阵面方向图达到要求-For large phased array antenna to adjust and optimize the real face is the front up to the required patterns
搜索 Platform: |
Size: 1024 |
Author:wcy |
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Description: 这个程序可以计算给定点处的小区信号范围覆盖。-is program computes a map of visibility from a selected point on a topography. It has been written to help the search for radio relay best location. Because it considers only direct line of sight, it gives a good estimation for possible radio link for short distances only (less than 10 km), neglecting curvature of the Earth, Fresnel zone and atmospheric refraction on radio waves propagation. The program computes the relative elevation angle of the mask for each point (the angle is null or negative if the point is visible).
The function needs a digital elevation model Z and associated (X,Y) vectors or matrices of coordinates (same unit as Z), position of the point (X0,Y0), the antenna height H0 (for instance 4 m), and the hypothetic antenna height Ha on each topography points (for instance 3 m). When no output argument is given, the function plots a map of the results (color map of mask angles, and blank for visible points, see example screenshot).
The script is not fully optimize Platform: |
Size: 434176 |
Author:ken |
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Description: 遗传算法在非线性数值优化方面有着很强的生命力 ,适于波束赋形阵列天线的综合。Matlab 具有很强的数值计算能力和数据图视功能 ,经过二十多年的发展 ,逐渐成为工程师们进行数值优化的首选计算机语言。以一部具有余割平 方波束的雷达搜索天线阵为例 ,采用遗传算法对其馈电相位进行优化 ,优化结果与目标吻合。同时给出其主要节点的 Matlab程序。-Nonlinear numerical optimization genetic algorithm has a strong vitality, suitable for antenna array beamforming integrated. Matlab has a strong numerical ability and visual function data plan, after 20 years of development, engineers have become the preferred numerical optimization computer language. To a beam with cosecant square antenna array radar search, for example, the genetic algorithm to optimize their feed phase to optimize the results coincide with the target. The main nodes are given Matlab program. Platform: |
Size: 330752 |
Author:victor728 |
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Description: 如何优化RFID读卡距离，优化天线，做RFID的朋友们最需要了-How to optimize RFID read range, optimizing the antenna, RFID friends to do most in need of a Platform: |
Size: 103424 |
Author:王 |
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Description: 本文给出了一种利用幅相加权对阵列天线进行全局优化的方法。为了使天线的辐射波束形成给定的
方向图，采用联合应用DFP和BFGS公式的变度量算法对阵列天线各单元的馈电幅度和相位分布进行优化，
通过C++语言编程计算实现，从而使得优化后的阵列天线主波束形状能够与预给波束形状相吻合，达到设计
要求。全局优化是本文的特色，它弥补了局部优化结果的精确度依赖于初始值的缺点，因而得以保证通过优
化得到的天线主波束与给定波束的主瓣相吻合，副瓣也得到有效控制。该方法具有快速收敛，计算量小等优
点，是一种解决阵列天线波束赋形问题的有效方法。 -In this paper, the amplitude and phase weighted array antennas for global optimization method. Order to make the antenna radiation beam to form a given pattern, using the combination of DFP and BFGS formula variable metric algorithm to optimize the amplitude and phase distribution of each cell of the array antenna feed, calculated through C++ language programming to achieve, which makes optimization array antenna main beam shape is consistent with the pre-to the beam shape to meet the design requirements. Global optimization is a feature of this article, it makes up for the shortcomings of the accuracy of the local optimization results depend on the initial value, and thus can be guaranteed through the optimization of the antenna main beam to coincide with the main lobe of a given beam, sidelobes also been effectively controlled . The method has fast convergence of computing and small volume, is a solution to the array antenna beamforming. Platform: |
Size: 1050624 |
Author:侯杰 |
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Description: 编程应用粒子群优化算法来优化天线，降低散射场，使天线得到优化-The programming using particle swarm optimization algorithm to optimize the antenna, reducing the scattered field, so that the antenna has been optimized Platform: |
Size: 1024 |
Author:rain |
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Description: 圆周阵列，优化振源位置的程序，属于优化天线的范畴-Circumferential array of procedures to optimize the vibration source position, belonging to optimize the antenna areas Platform: |
Size: 52224 |
Author:康健 |
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Description: 利用蚁群优化算法来优化阵列天线的阵源个数，达到优化天线性能的目的。-Ant colony optimization algorithm to optimize the array antenna array number of sources, to achieve the purpose of optimizing the performance of the antenna. Platform: |
Size: 460800 |
Author:康健 |
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Description: 优化天线的副瓣电平，利用遗传算法进行优化，可使副瓣电平达到-20dB-Optimized antenna sidelobe level, the use of genetic algorithms to optimize the sidelobe level can achieve-20dB Platform: |
Size: 1024 |
Author:小崔 |
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Description: 这个遗传算法用于优化天线的幅度和相位两个目标，并且适用于多个优化参数的优化，能达到很好的效果，可以用于其它各种天线的优化。-The genetic algorithm is used to optimize the antenna amplitude and phase of the two target, optimization and is applicable to multiple parameter optimization, can achieve very good results, optimization can be used for a variety of other antenna.
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Size: 506880 |
Author:刘路 |
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Description: taylor分布的天线综合代码，基于原始的指数方程编写，并且附加了相位项，可以用来优化综合。-taylor antenna integrated code distribution, exponential equations based on the original writing, and an additional phase term can be used to optimize the synthesis. Platform: |
Size: 1024 |
Author:lucheng |
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Description: This text uses the standard Matlab package in order to model and optimize radiation and scattering of basis RF and wireless communication antennas and microwave structures. Platform: |
Size: 8285184 |
Author:javihil |
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Description: 遗传算法，基于matlab软件，优化天线方向图振幅-genetic algorithm, based on the software of matlab, and it can optimize the amplitude of antenna pattern Platform: |
Size: 2048 |
Author:leo |
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Description: 使用matlab进行利用遗传算法对天线阵列进行优化。-Using matlab and genetic algorithm to optimize the antenna array. Platform: |
Size: 7168 |
Author:It s me |
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