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通讯编程文档 Abstract-The effect of the companding process on QAM signals has been under investigation for the p
Abstract-The effect of the companding process on QAM signals
has been under investigation for the past several years. The
compander, included in the PCM telephone network to improve
voice performance, has an unusual affect on digital QAM data
signals which are transmitted over the same channel. The ...
书籍 LTE-Advanced+Relay+Technology
LTE-Advanced becomes a truly global standard for 4G cellular communications.
Relay, as one of the key technologies of LTE-Advanced, can significantly extend
the coverage, and improve the system throughput. LTE-A standards and tech-
nologies were described in several recent books where the limited pa ...
技术资料 PW2202-2.0.pdf规格书下载
The PW2202 is silicon N-channel Enhanced VDMOSFETs, is obtained by the self-aligned planarTechnology which reduce the conduction loss, improve switching performance and enhance theavalanche energy. The transistor can be used in various power switching circuit for system
技术资料 基于51单片机智能抢答器的设计
本文是以单片机为控制核心的16路抢答器,它能根据不同的抢答输入信号通过LED数码管显示,并具有自动锁存优先输入信号和自动复位功能。该电路具有结构简单,功能强大,智能化程度高,故障率低的特点。This article is a 16-channel responder with a single-chip microcomputer as the control core.It can display through the L ...
技术资料 IGBT图解
le flows through MOS channel while Ih flows across PNP transistor Ih= a/(1-a) le, IE-le+lh=1/(1-a)' le Since IGBT has a long base PNP, a is mainly determined by ar si0 2ar= 1/cosh(1/La), La: ambipolar diff length a-0.5 (typical value)p MOSFET channel current (saturation), le=U"Cox"W(2"Lch)"(Vc-V ...
模拟电子 MAX4968,MAX4968A数据手册
The MAX4968/MAX4968A are 16-channel, high-linearity,high-voltage, bidirectional SPST analog switches with18I (typ) on-resistance. The devices are ideal for use inapplications requiring high-voltage switching controlledby a low-voltage control signal, such as ultrasound imagingand printers. The MAX ...
其他书籍 Carrier-phase synchronization can be approached in a general manner by estimating the multiplicativ
Carrier-phase synchronization can be approached in a
general manner by estimating the multiplicative distortion (MD) to which
a baseband received signal in an RF or coherent optical transmission
system is subjected. This paper presents a unified modeling and
estimation of the MD in finite-alphabet d ...
书籍 Time-Varying Channels
Wireless communications has become a field of enormous scientific and economic interest. Recent
success stories include 2G and 3G cellular voice and data services (e.g., GSM and UMTS), wireless
local area networks (WiFi/IEEE 802.11x), wireless broadband access (WiMAX/IEEE 802.16x), and
digital broad ...
技术资料 极化码的编解码研究及仿真
信道编码技术能够显著改善通信系统的性能，带来编码增益，提高通信系统的容量。一直以来，人们都在寻找一种信道容量可以达到香农极限的编码。2007年，E.Arikan提出了一种名为极化码（Polar Code）的编码技术，在二进制离散无记忆信道条件下，理论上被证明可以达到香农极限，并且编解码具有较低的算法复杂度，成为信道编码史 ...
单片机编程 MAXX9257 MAX9258芯片可编程SerDes持续时间计算
The MAX9257/MAX9258 programmable serializer/deserializer (SerDes) devices transfer both video data and control signals over the same twisted-pair cable. However, control data can only be transmitted during the vertical blank time, which is indicated by the control-channel-enabled output (CCEN) sig ...