-
Internetworking-3_WANs(zslcn)
本章介绍了用于WAN(广域网)环境的各种协议和技术。在这里概述的题目包括点对点链路，电路交换，分组包交换，虚电路，拨号服务，和WAN设备。在手册第3部分,‘WAN协议’,的各章里将更详细地讲述专门技术。
(
This article introduces the various protocols and technologies used in wide-area network (WAN) environments. Topics summarized here include point-to-point links, circuit switching, packet switching, virtual circuits, dialup services, and WAN devices. Chapters in Part 3, “WAN Protocols,” address specific technologies in more detail. )
- 2011-09-16 12:25:44下载
- 积分：1
-
s29gl256s
说明： s29gl256s nor flash 源代码(s29gl256s device source code)
- 2019-03-03 11:46:03下载
- 积分：1
-
Hiisi1.6.3
手机通过蓝牙上网不走GPRS流量，一定是很好的源代码，欢迎下载，现在此软件只能一个手机连接一台电脑上网！理论上可以七个手机同时连接一台电脑上网！有要研究七台手机连接一台电脑上网的请发邮件至 jodyyang@163.com反应大家加入！(Don t go through bluetooth phones Internet traffic, must be very GPRS good source, welcome to download this software, now only a mobile phone connection computer online! Seven cell phones can theoretically computer Internet connection! Have to study the daytime phone connection of computer net please email to jodyyang@163.com reaction!)
- 2020-06-25 23:40:01下载
- 积分：1
-
BPSK-modulation--Hamming
BPSK调制，采用（15,11）汉明码对信号编码；然后对信号加噪，解调，译码。(BPSK modulation (15,11) Hamming code signal encoding then added noise to the signal, demodulation, decoding.)
- 2012-12-05 22:31:02下载
- 积分：1
-
GSM-cell
该程序全面仿真了蜂窝小区，主要是信道分配、切换等(The program overall simulation of a honeycomb village, mainly is the channel allocation, switch, etc
)
- 2012-04-20 09:56:36下载
- 积分：1
-
max264
说明： 本文介绍了如何使用264芯片，并对可编程增益可调的滤波器max264做了具体说明.(for how to use max264)
- 2009-08-20 07:48:26下载
- 积分：1
-
gefax-0.06.tar
收发传真，浏览传真的程序(A program which receive、send and scan fax)
- 2002-01-02 21:30:30下载
- 积分：1
-
基于AM335X平台的Ethercat实现.pdf
说明： EtherCAT(以太网控制自动化技技)是一种用于确定性以太网的高性能技业通信协议,它扩展了IEEE 802.3 以太网标准,使得数据传输中具有可预测性定时及高精度同步等特点。这个开放性标准作为 IEC 61158 的组成部分,常用于机械设计及运动控制等应用中。EtherCAT 采用标准的IEEE802-3 以太网帧,帧结构如图 1。EtherCAT 协议直接用标准以太网的帧格嵌传输数据,并不修改其基本结构(ethercat communication)
- 2019-04-19 14:00:20下载
- 积分：1
-
程序
说明： 当今世界电子对抗日益激烈，对于雷达低截获和抗干扰能力的研究越来越受到关注。OFDM (Orthorgonal Frequency Division Multiplexing，正交频分复用)雷达具有大时宽带宽积、波形设计方法灵活、频谱利用率较高以及低截获性能好的特性，因此逐渐成为雷达领域的重点研究方向。除此之外，OFDM信号时域和频域波形都比较复杂，当雷达信号采用OFDM技术时，敌方很难精确估计发射信号波形和瞬时频率，使得截获机不容易分析出检测到的雷达信号。当面对敌方的欺骗式干扰时，对于同样具有大时宽带宽积的线性调频信号，OFDM信号具有更好的抗欺骗式干扰的性能，因此OFDM技术在雷达上的运用愈来愈得到关注。(As electronic warfare becomes increasingly fierce, low intercept probability radar has become an important research filed in electronic countermeasures. OFDM (Orthorgonal Frequency Division Multiplexing) radars have gradually emerged due to their high spectrum efficiency, large time-bandwidth product, flexible waveform design methods, and low intercept probability.In addition, because of the complex time-frequency characteristics of the transmitted signal in OFDM radar, the enemy is difficult to estimate the transmitted signal waveform and instantaneous frequency.When faced with enemy deception interference, OFDM signals have better anti-spoofing performance for LFM signals that also have a large time-bandwidth bandwidth product. Therefore, the use of OFDM technology in radar is attracting more and more attention. .)
- 2020-11-19 21:49:39下载
- 积分：1
-
一种基于高阶累积量的数字调相信号识别方法
说明： 对当前通信信号中常用的数字调相信号BPSK、QPSK、1／4一QPSK、8PSK的调制识别问题，提出了一种基于信号差分高阶累积量的识剐算法。该算法分两个层次进行调制识别，首先利用信号的四阶累积量特征对BPSK、QPSK和{1／4一QPSK、8PSK}信号进行识别，然后再利用信号差分的四阶和八阶累积量特征对1/4-QPSK、8PSK信号进行识别。从理论上分析了的该算法的有效性，并通过计算机仿真验证了算法具有良好的性能。(A recognition algorithm based on differential high-order cumulant is proposed for the modulation recognition problems of BPSK, QPSK, 1/4-QPSK and 8PSK, which are commonly used in current communication signals. The algorithm is divided into two levels for modulation recognition. Firstly, BPSK, QPSK and {1/4-QPSK, 8PSK} signals are identified by using the fourth-order cumulant characteristics of signals, and then 1/4-QPSK and 8PSK signals are identified by using the fourth-order cumulant and eighth-order cumulant characteristics of signal difference. The validity of the algorithm is analyzed theoretically, and the good performance of the algorithm is verified by computer simulation.)
- 2020-06-21 09:40:02下载
- 积分：1
