The LPC1700 Ethernet block contains a full featured 10 Mbps or 100 Mbps Ethernet MAC (Media Access Controller) designed to provide optimized performance through the use of DMA hardware acceleration. Features include a generous suite of control registers, half or full duplex operation, flow control, control frames, hardware acceleration for transmit retry, receive packet filtering and wake-up on LAN activity. Automatic frame transmission and reception with Scatter-Gather DMA off-loads many operations from the CPU.
上传时间： 2013-11-09
上传用户：geshaowei
OFDM是无人机高速遥测信道中的主要传输技术之一，但是OFDM系统的主要缺陷之一是具有较高的峰均比。文中研究了一种信道纠错编码与迭代限幅滤波算法（Repeated Clipping and Filtering，RCF）相结合的峰均比抑制方案。仿真结果表明，RCF算法能够实现峰均比的有效抑制，卷积编码和Turbo编码能够有效抑制RCF算法产生的限幅噪声，降低系统误码率。
上传时间： 2013-10-08
上传用户：sunshie
基于通用集成运算放大器，利用MASON公式设计了一个多功能二阶通用滤波器，能同时或分别实现低通、高通和带通滤波，也能设计成一个正交振荡器。电路的极点频率和品质因数能够独立、精确地调节。电路使用4个集成运放、2个电容和11个电阻，所有集成运放的反相端虚地。利用计算机仿真电路的通用滤波功能、极点频率和品质因数的独立控制和正交正弦振荡，从而证明该滤波器正确有效。 Abstract: A new multifunctional second-order filter based on OPs was presented by MASON formula. Functions， such as high-pass， band-pass， low-pass filtering， can be realized respectively and simultaneously， and can become a quadrature oscillator by modifying resistance ratio. Its pole angular frequency and quality factor can be tuned accurately and independently. The circuit presented contains four OPs， two capacitors， and eleven resistances， and inverting input of all OPs is virtual ground. Its general filtering， the independent control of pole frequency and quality factor and quadrature sinusoidal oscillation were simulated by computer， and the result shows that the presented circuit is valid and effective.
上传时间： 2013-10-09
上传用户：13788529953
XMail is an Internet and intranet mail server featuring an SMTP server, POP3 server, finger server, multiple domains, no need for users to have a real system account, SMTP relay checking, RBL/RSS/ORBS/DUL and custom ( IP based and address based ) spam protection, SMTP authentication ( PLAIN LOGIN CRAM-MD5 POP3-before-SMTP and custom ), a POP3 account syncronizer with external POP3 accounts, account aliases, domain aliases, custom mail processing, direct mail files delivery, custom mail filters, mailing lists, remote administration, custom mail exchangers, logging, and multi-platform code. XMail sources compile under GNU/Linux, FreeBSD, OpenBSD, NetBSD, OSX, Solaris and NT/2K/XP.
标签： server featuring Internet intranet
上传时间： 2015-01-12
上传用户：asddsd
The following Philips LPC2k CAN examples in this directory were provided by ESAcademy. LPC2_CANAll_V110: Receives all CAN messages in a receive queue. LPC2_CANFull_V110: Uses Full-CAN-like reception filtering. LPC2_CANBlinky_V130: Minimal example of MicroCANopen, uses Full-CAN-like reception filtering and implements both Rx and Tx Interrupt Service Routines.
标签： ESAcademy following directory examples
上传时间： 2015-04-24
上传用户：hasan2015
The following Philips LPC2k CAN examples in this directory were provided by ESAcademy. LPC2_CANAll_V110: Receives all CAN messages in a receive queue. LPC2_CANFull_V110: Uses Full-CAN-like reception filtering. LPC2_CANBlinky_V130: Minimal example of MicroCANopen, uses Full-CAN-like reception filtering and implements both Rx and Tx Interrupt Service Routines.
标签： ESAcademy following directory examples
上传时间： 2013-12-13
上传用户：牛津鞋
The following Philips LPC2k CAN examples in this directory were provided by ESAcademy. LPC2_CANAll_V110: Receives all CAN messages in a receive queue. LPC2_CANFull_V110: Uses Full-CAN-like reception filtering. LPC2_CANBlinky_V130: Minimal example of MicroCANopen, uses Full-CAN-like reception filtering and implements both Rx and Tx Interrupt Service Routines.
标签： ESAcademy following directory examples
上传时间： 2014-01-06
上传用户：zukfu
he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering, (e.g. RC circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 to control for example the speed of DC motors or the brightness of electric lighting.
标签： signal Modulated analog create
上传时间： 2015-05-14
上传用户：CHINA526
基于信息融合的图像边缘检测方法研究,⑴直方图均衡化（histogram equalization），⑵直方图匹配（histogram matching），⑶邻域平均（neighborhood averaging），⑷局域增强（local enhancement）， ⑸中值滤波（median filtering）。
标签： equalization histogram 信息融合 图像边缘检测
上传时间： 2014-11-06
上传用户：frank1234
工学博士学位论文 目前，扩展卡尔曼滤波是研究初始对准和惯性/GPS组合导航问题的一个主要手段。 但初始对准和惯性/GPS组合导航问题本质上是非线性的，对模型进行线性化的扩展卡 尔曼滤波在一定程度上影响了系统的性能。近年来，直接使用非线性模型的 UKF(Unscented Kalman Filtering, UKF)和粒子滤波，正在逐渐成为研究非线性估计问题 的热点和有效方法。 本文研究了UKF和粒子滤波两种非线性滤波方法，并将其应用于非线性静基座对 准和惯性/GPS组合导航，系统地研究了初始对准和惯性/GPS组合导航中各种非线性项
标签： 论文
上传时间： 2015-07-11
上传用户：450976175
