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asd
航空航天通信技术一般采用模拟通信的频率调制和数字通信的移相键控调制方法。这有利于充分应用信道带宽和能源。频率调制是在一定程度上改变载波或副载波的频率来传输信息的调制方法。移相键控调制是利用载波或副载波的相位跳变来传输信息的调制方法。移相键控又分二相移相键控、四相移相键控和多相移相键控,其中以四相移相键控和八相移相键控调制方法的效率较高(Aerospace communications technology commonly used analog communication of frequency modulation and the digital communication phase shift keying modulation method. This is helpful for making full use of channel bandwidth and energy. Frequency modulation is changed to some extent carrier or subcarrier frequency to transmit information modulation method. Phase shift keying modulation is the use of carrier or subcarrier phase jump to transmit information modulation method. Phase shift keying and binary phase shift keying, four phase shift keying and multiple phase shift keying, of which four phase shift keying and eight phase shift keying modulation method of high efficiency
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- 2011-07-13 11:21:08下载
- 积分:1
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uCOSonTMS320F281x
uC OS_II在DSP芯片TMS320F281x上的移植(OS_II embedded DSP chip in the transplant TMS320F281x)
- 2007-03-12 17:24:53下载
- 积分:1
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IEC-61850标准(打印版)
说明: DL/T860系列文档完整版,IEC61850通讯模型(DL / T860 series document complete version, IEC61850 communication model)
- 2021-04-28 15:08:43下载
- 积分:1
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Spread-spectrum
This document describes about the digital modulation techniques especially about spread spectrum.
- 2012-07-06 15:46:04下载
- 积分:1
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LMS
自适应的LMS算法及其应用
本实验通过一个二阶自回归过程来研究实时数据集平均对LMS算法的影响
包含MATLAB代码(LMS algorithm)
- 2021-05-06 18:58:37下载
- 积分:1
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ADIBEAM
ADIBEAM
Abstract—the increase in navigation accuracy demanded by
EGNOS and Galileo and their future evolution encourages the
study and design of advance receiver architectures. In that
direction, the ADIBEAM project focuses on the design of high
accuracy ground stations, specifically GNSS Reference Stations, in
order to improve its robustness in front of multipath and
interference errors with the goal of achieving centimeter level
tracking accuracy. The adoption of antenna arrays and digital
beamforming at the ground reference station receivers is one of
the most promising approaches to cope with errors induced by
multipath and interference.
- 2012-01-23 23:20:55下载
- 积分:1
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communication
一份红外通讯的编码设计,已经经过实验,支持一对多。(Encoding of an infrared communication design, and after the experiment, to support one to many.)
- 2012-04-11 11:42:38下载
- 积分:1
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instructions
Photovoltaic systems, solar thermal systems based on knowledge training(PVSystem)
- 2010-10-21 09:24:46下载
- 积分:1
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Linux_ip
详细的讲述了linux的ip/tcp通信部分的协议栈,对开发很有帮助(Linux detail of the ip/tcp communication part of the protocol stack, on the development of useful)
- 2009-04-06 01:45:51下载
- 积分:1
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clclostayionary
循环平稳入门讲解,关于循环平稳常用的参数,简单易懂(It is simple and easy to understand the commonly used parameters of circular stationary.)
- 2020-10-19 14:07:26下载
- 积分:1