Codebook is a known matrix, had been create and setup when initial design a system. Each column in codebook specifies a beamforming weight vector, or in other words, specifies a combination for the phase shifters and amplitude controllers to create a respect radiation pattern. All columns should span the entire space around the beamformer (the device that steers the beam), 360 degree with 1-D array antenna and sphere space with 2-D array. This requirement ensures wherever the beamformee (the target device of the steered beam) locates, there is a weight vector steers the beam to it and keep the channel in good condition. To reduce the complexity and electrical elements, in this paper we consider only the phase in 1-D array antenna by controlling the phase shifters, without examining the amplitude of the signal.
Codebook is a known matrix, had been create and setup when initial design a system. Each column in codebook specifies a beamforming weight vector, or in other words, specifies a combination for the phase shifters and amplitude controllers to create a respect radiation pattern. All columns should span the entire space around the beamformer (the device that steers the beam), 360 degree with 1-D array antenna and sphere space with 2-D array. This requirement ensures wherever the beamformee (the target device of the steered beam) locates, there is a weight vector steers the beam to it and keep the channel in good condition. To reduce the complexity and electrical elements, in this paper we consider only the phase in 1-D array antenna by controlling the phase shifters, without examining the amplitude of the signal. (2015-08-26, matlab, 1KB, 下载6次)
Introduction
This section builds an example step-by-step to give you a first look at the Communications System Toolbox™ software. This section also shows how Communications System Toolbox functionalities build upon the computational and visualization tools in the underlying MATLAB® environment.
Modulate a Random Signal
This example shows how to process a binary data stream using a communication system that consists of a baseband modulator, channel, and demodulator. The system s bit error rate (BER) is computed and the transmitted and received signals are displayed in a constellation diagram.
The following table summarizes the basic operations used, along with relevant Communications System Toolbox and MATLAB functions. The example uses baseband 16-QAM (quadrature amplitude modulation) as the modulation scheme and AWGN (additive white Gaussian noise) as the channel model.
Introduction
This section builds an example step-by-step to give you a first look at the Communications System Toolbox™ software. This section also shows how Communications System Toolbox functionalities build upon the computational and visualization tools in the underlying MATLAB® environment.
Modulate a Random Signal
This example shows how to process a binary data stream using a communication system that consists of a baseband modulator, channel, and demodulator. The system s bit error rate (BER) is computed and the transmitted and received signals are displayed in a constellation diagram.
The following table summarizes the basic operations used, along with relevant Communications System Toolbox and MATLAB functions. The example uses baseband 16-QAM (quadrature amplitude modulation) as the modulation scheme and AWGN (additive white Gaussian noise) as the channel model. (2015-08-26, matlab, 1KB, 下载2次)
Introduction
This section builds an example step-by-step to give you a first look at the Communications System Toolbox™ software. This section also shows how Communications System Toolbox functionalities build upon the computational and visualization tools in the underlying MATLAB® environment.
Modulate a Random Signal
This example shows how to process a binary data stream using a communication system that consists of a baseband modulator, channel, and demodulator. The system s bit error rate (BER) is computed and the transmitted and received signals are displayed in a constellation diagram.
The following table summarizes the basic operations used, along with relevant Communications System Toolbox and MATLAB functions. The example uses baseband 16-QAM (quadrature amplitude modulation) as the modulation scheme and AWGN (additive white Gaussian noise) as the channel model.
Introduction
This section builds an example step-by-step to give you a first look at the Communications System Toolbox™ software. This section also shows how Communications System Toolbox functionalities build upon the computational and visualization tools in the underlying MATLAB® environment.
Modulate a Random Signal
This example shows how to process a binary data stream using a communication system that consists of a baseband modulator, channel, and demodulator. The system s bit error rate (BER) is computed and the transmitted and received signals are displayed in a constellation diagram.
The following table summarizes the basic operations used, along with relevant Communications System Toolbox and MATLAB functions. The example uses baseband 16-QAM (quadrature amplitude modulation) as the modulation scheme and AWGN (additive white Gaussian noise) as the channel model. (2015-08-26, matlab, 1KB, 下载1次)
无线智能车载监控系统的设计与实现,论文，内部带有详细说明文档
Wireless intelligent vehicle monitoring system design and implementation, papers, with a detailed description of the internal documentation (2013-10-19, Windows_Unix, 3337KB, 下载5次)
Ralink RT5350的官方参考设计，包含bom，PCB，SCH和生产文件。
Ralink RT5350 official reference design, including the bom, the PCB, SCH and production documents. (2012-06-11, Unix_Linux, 2354KB, 下载1849次)
当前，矢量控制是一种优越的交流电机控制方式，它模拟直流电机的控制方式使得交流电机也能取得与直流电机相媲美的控制
效果。依据矢量控制的基本原理和方法，用
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模块构建了一个基于转子磁场定向的旋转坐标系下的交流异步
电机矢量控制系统仿真模型，对其速度控制器提出并设计一种模糊滑模变结构控制算法。该控制算法具备模糊逻辑控制和滑模
变结构控制两者优点，并且较好地解决了滑动模态的抖动问题。仿真结果表明了该设计的可行性以及具有良好的动静态性能、
较强的鲁棒性
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G+@).* J.CFG .K 5’ J.@.A EFB@.A B.*@A.G ?D?@FJ >+?FC .* @(F A.@.A KG1Q .A)F*@FC B..AC)*+@F )* @()? I+IFAL R1SSD ?G)C)*/ E+A)+>GF ?@A1B@1AF
B.*@A.G O+? IA.I.?FC+*C FJIG.DFC )* ?IFFC B.*@A.GGFAL 6(F B.*@A.GGFA I.??F??FC @(F JFA)@? .K K1SSD G./)B B.*@A.G+*C ?G)C)*/ J.CF E+A)+>GF
?@A1B@1AF B.*@A.G
，
+*C )@ B+* ?.GEF @(F IA.>GFJ .K @(F B(+@@FA)*/ .K ?G)C)*/ J.CFL 6(F AF?1G@? .K ?)J1G+@).* )*C)B+@F @(+@ @(F B.*@A.GGFA O+?
O.AT+>GF O)@( /..C A.>1?@*F??+*C /..C CD*+J)B+*C ?@+@)B IFAK.AJ+*BF F?IFB)+GGD )* @(F K)FGC .K F*/)*FFA)*/ (2011-12-04, matlab, 372KB, 下载106次)
是一款降压型LED恒流驱动IC，SOT23-6封装，，输入电压为5到38V，输出电流最大为1A，效率高达97 ，含有PWM调光功能。主用在12V/24V LED MR16恒流板，LED手电筒板，LED背光驱动等等产品上
A buck type constant current LED driver IC, SOT23-6 package, input voltage of 5 to 38V, output current up to 1A, efficiency up to 97 , with PWM dimming. Main constant with the board in 12V/24V LED MR16, LED flashlight panels, LED backlight driver, and so the product (2011-10-27, PDF, 265KB, 下载38次)
中国国家军用EMC设计标准， GJB152a-97
China' s military EMC design standards, (2011-03-09, PPT, 2173KB, 下载28次)
本例以由拓扑关系的arc/info 文件为数据源。其中a1,b1,c1是以fnode排序生成的数组，a1对应fnode,b1对应tnode,c1对应length,同样a2,b2,c2,是以tnode 生成的数组。Indexa1是对应某一起点与其相连的终点的个数，indexb1时对应某一终点与其相连的起点的个数，即其拓扑关系
length, the same a2, b2, c2, is based on an array of tnode generated. Indexa1 is a starting point corresponding to the number of its connected to the end, indexb1 corresponds to an end when the starting point of the number of its connected, that is, its topological relationship (2010-03-19, Delphi, 1KB, 下载4次)
Its about implementation of interleavers
Its about implementation of interleavers (2010-02-27, PDF, 332KB, 下载2次)
中值滤波的实现，该代码使用的是verilog 语言
module median(clk,reset,load,din,mult,dout,over,a3,b3,c3,a2,b2,c2,a1,b1,c1)
Median filter implementation, the code using verilog language module median (clk, reset, load, din, mult, dout, over, a3, b3, c3, a2, b2, c2, a1, b1, c1) (2009-11-04, VHDL, 2KB, 下载114次)
介绍了用于Xilinx和AlteraFPGA的电源管理解决方案
Introduced AlteraFPGA for Xilinx and power management solution (2009-07-30, PDF, 698KB, 下载4次)
简易数字频率计--描述了97年电子设计大赛中B题的一些思路和方法。
Simple digital frequency meter- 97 describes the Electronic Design Competition B title in a number of ideas and methods. (2009-05-06, Others, 348KB, 下载92次)
中国电信 东北9省
客服系统E_R设计
northeast China Telecom nine provinces customer service system design E_R (2005-11-13, MultiPlatform, 336KB, 下载25次)