The ever-increasing demand for private and sensitive data transmission over wireless net- works has made security a crucial concern in the current and future large-scale, dynamic, and heterogeneous wireless communication systems. To Address this challenge, computer scientists and engineers have tried hard to continuously come up with improved crypto- graphic algorithms. But typically we do not need to wait too long to find an efficient way to crack these algorithms. With the rapid progress of computational devices, the current cryptographic methods are already becoming more unreliable. In recent years, wireless re- searchers have sought a new security paradigm termed physical layer security. Unlike the traditional cryptographic approach which ignores the effect of the wireless medium, physi- cal layer security exploits the important characteristics of wireless channel, such as fading, interference, and noise, for improving the communication security against eavesdropping attacks. This new security paradigm is expected to complement and significantly increase the overall communication security of future wireless networks.
标签： Communications Physical Security Wireless Layer in
上传时间： 2020-05-31
上传用户：shancjb
With the advent of IMT-2000, CDMA has emerged at the focal point of interest in wireless communications. Now it has become impossible to discuss wireless communications without knowing the CDMA technologies. There are a number of books readily published on the CDMA technologies, but they are mostly dealing with the traditional spread-spectrum technologies and the IS-95 based CDMA systems. As a large number of novel and interesting technologies have been newly developed throughout the IMT-2000 standardization process in very recent years, new reference books are now demanding that Address the diverse spectrum of the new CDMA technologies.
标签： Communications Scrambling Techniques CDMA for
上传时间： 2020-06-01
上传用户：shancjb
RFID is at a critical price point that could enable its large-scale adoption. What strengths are pushing it forward? What technical challenges and privacy concerns must we still Address?
标签： an-introduction-to-rfid-technolog
上传时间： 2020-06-08
上传用户：shancjb
Human Factors and Systems Interaction aims to Address the main issues of concern within systems interface with a particular emphasis on the system lifecycle development and implementation of interfaces and the general implications of virtual, augmented and mixed reality with respect to human and technology interaction. Human Factors and Systems Interaction is, in the first instance, affected by the forces shaping the nature offuture computing and systems development
标签： Interactions Advances Factors System Human and in
上传时间： 2020-06-10
上传用户：shancjb
THIS PUBLICATION IS COPYRIGHT PROTECTEDCopyright © 2014 IEC, Geneva, SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any formor by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing fromeither IEC or IEC's member National Committee in the country of the requester. If you have any questions about IECcopyright or have an enquiry about obtaining additional rights to this publication, please contact the Address below oryour local IEC member National Committee for further information.Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduiteni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopieet les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez desquestions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisezles coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
标签： iec标准
上传时间： 2021-10-21
上传用户：kent
FPGA读写SD卡读取BMP图片通过LCD显示例程实验 Verilog逻辑源码Quartus工程文件+文档说明,FPGA型号Cyclone4E系列中的EP4CE6F17C8，Quartus版本17.1。1 实验简介在前面的实验中我们练习了 SD 卡读写，VGA 视频显示等例程，本实验将 SD 卡里的 BMP 图片读出，写入到外部存储器，再通过 VGA、LCD 等显示。本实验如果通过液晶屏显示，需要有液晶屏模块。2 实验原理在前面的实验中我们在 VGA、LCD 上显示的是彩条，是 FPGA 内部产生的数据，本实验将彩条替换为 SD 内的 BMP 图片数据，但是 SD 卡读取速度远远不能满足显示速度的要求，只能先写入外部高速 RAM，再读出后给视频时序模块显示module top( input clk, input rst_n, input key1, output [5:0] seg_sel, output [7:0] seg_data, output vga_out_hs, //vga horizontal synchronization output vga_out_vs, //vga vertical synchronization output[4:0] vga_out_r, //vga red output[5:0] vga_out_g, //vga green output[4:0] vga_out_b, //vga blue output sd_ncs, //SD card chip select (SPI mode) output sd_dclk, //SD card clock output sd_mosi, //SD card controller data output input sd_miso, //SD card controller data input output sdram_clk, //sdram clock output sdram_cke, //sdram clock enable output sdram_cs_n, //sdram chip select output sdram_we_n, //sdram write enable output sdram_cas_n, //sdram column Address strobe output sdram_ras_n, //sdram row Address strobe output[1:0] sdram_dqm, //sdram data enable output[1:0] sdram_ba, //sdram bank Address output[12:0] sdram_addr, //sdram Address inout[15:0] sdram_dq //sdram data);parameter MEM_DATA_BITS = 16 ; //external memory user interface data widthparameter ADDR_BITS = 24
标签： fpga
上传时间： 2021-10-27
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IIC接口E2PROM(AT24C64) 读写VERILOG 驱动源码+仿真激励文件:module i2c_dri #( parameter SLAVE_ADDR = 7'b1010000 , //EEPROM从机地址 parameter CLK_FREQ = 26'd50_000_000, //模块输入的时钟频率 parameter I2C_FREQ = 18'd250_000 //IIC_SCL的时钟频率 ) ( input clk , input rst_n , //i2c interface input i2c_exec , //I2C触发执行信号 input bit_ctrl , //字地址位控制(16b/8b) input i2c_rh_wl , //I2C读写控制信号 input [15:0] i2c_addr , //I2C器件内地址 input [ 7:0] i2c_data_w , //I2C要写的数据 output reg [ 7:0] i2c_data_r , //I2C读出的数据 output reg i2c_done , //I2C一次操作完成 output reg i2c_ack , //I2C应答标志 0:应答 1:未应答 output reg scl , //I2C的SCL时钟信号 inout sda , //I2C的SDA信号 //user interface output reg dri_clk //驱动I2C操作的驱动时钟 );//localparam definelocalparam st_idle = 8'b0000_0001; //空闲状态localparam st_sladdr = 8'b0000_0010; //发送器件地址(slave Address)localparam st_addr16 = 8'b0000_0100; //发送16位字地址localparam st_addr8 = 8'b0000_1000; //发送8位字地址localparam st_data_wr = 8'b0001_0000; //写数据(8 bit)localparam st_addr_rd = 8'b0010_0000; //发送器件地址读localparam st_data_rd = 8'b0100_0000; //读数据(8 bit)localparam st_stop = 8'b1000_0000; //结束I2C操作//reg definereg sda_dir ; //I2C数据(SDA)方向控制reg sda_out ; //SDA输出信号reg st_done ; //状态结束reg wr_flag ; //写标志reg [ 6:0] cnt ; //计数reg [ 7:0] cur_state ; //状态机当前状态reg [ 7:0] next_state; //状态机下一状态reg [15:0] addr_t ; //地址reg [ 7:0] data_r ; //读取的数据reg [ 7:0] data_wr_t ; //I2C需写的数据的临时寄存reg [ 9:0] clk_cnt ; //分频时
标签： iic 接口 e2prom at24c64 verilog 驱动 仿真
上传时间： 2021-11-05
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This book Addresses programmer attitudes, but it’s not some kind of psychology textbook. We’ll investigate many topics, including: Source code presentation Defensive coding techniques How to debug programs effectively Good teamworking skills Managing your source code Take a quick glance through the table of contents to see exactly what’s covered. What is the rationale behind my selection of topics? I’ve been mentor- ing trainee programmers for many years, and these are the topics that have come up time and time again. I’ve also worked in the software factory for long enough to have seen the recurring problems—I Address these too. If you can conquer all of these programming demons, you’ll progress from an apprentice coder to a real code craftsman.
标签： excellent practice writing Craft Code code the of
上传时间： 2021-11-09
上传用户：danix800
FPGA读取OV5640摄像头数据并通过VGA或LCD屏显示输出的Verilog逻辑源码Quartus工程文件+文档说明，FPGA型号Cyclone4E系列中的EP4CE6F17C8，Quartus版本17.1。module top( input clk, input rst_n, output cmos_scl, //cmos i2c clock inout cmos_sda, //cmos i2c data input cmos_vsync, //cmos vsync input cmos_href, //cmos hsync refrence,data valid input cmos_pclk, //cmos pxiel clock output cmos_xclk, //cmos externl clock input [7:0] cmos_db, //cmos data output cmos_rst_n, //cmos reset output cmos_pwdn, //cmos power down output vga_out_hs, //vga horizontal synchronization output vga_out_vs, //vga vertical synchronization output[4:0] vga_out_r, //vga red output[5:0] vga_out_g, //vga green output[4:0] vga_out_b, //vga blue output sdram_clk, //sdram clock output sdram_cke, //sdram clock enable output sdram_cs_n, //sdram chip select output sdram_we_n, //sdram write enable output sdram_cas_n, //sdram column Address strobe output sdram_ras_n, //sdram row Address strobe output[1:0] sdram_dqm, //sdram data enable output[1:0] sdram_ba, //sdram bank Address output[12:0] sdram_addr, //sdram Address inout[15:0] sdram_dq //sdram data);
上传时间： 2021-12-18
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基于FPGA设计的sdram读写测试实验Verilog逻辑源码Quartus工程文件+文档说明，DRAM选用海力士公司的 HY57V2562 型号,容量为的 256Mbit,采用了 54 引脚的TSOP 封装, 数据宽度都为 16 位, 工作电压为 3.3V,并丏采用同步接口方式所有的信号都是时钟信号。FPGA型号Cyclone4E系列中的EP4CE6F17C8，Quartus版本17.1。timescale 1ps/1psmodule top(input clk,input rst_n,output[1:0] led,output sdram_clk, //sdram clockoutput sdram_cke, //sdram clock enableoutput sdram_cs_n, //sdram chip selectoutput sdram_we_n, //sdram write enableoutput sdram_cas_n, //sdram column Address strobeoutput sdram_ras_n, //sdram row Address strobeoutput[1:0] sdram_dqm, //sdram data enable output[1:0] sdram_ba, //sdram bank Addressoutput[12:0] sdram_addr, //sdram Addressinout[15:0] sdram_dq //sdram data);parameter MEM_DATA_BITS = 16 ; //external memory user interface data widthparameter ADDR_BITS = 24 ; //external memory user interface Address widthparameter BUSRT_BITS = 10 ; //external memory user interface burst widthparameter BURST_SIZE = 128 ; //burst sizewire wr_burst_data_req; // from external memory controller,write data request ,before data 1 clockwire wr_burst_finish; // from external memory controller,burst write finish
标签： fpga sdram verilog quartus
上传时间： 2021-12-18
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