Abstract:Thearticleismainlydevotedtothetheoryaswellastheachievementonthemodulationanddemodulationofπ/ 4-DQPSKsysteminthesoftwareSystemView.Besides,thearticleanalysesthedynamicandstatic behaviorsoftheπ/4-DQPSKsystemaswellastheperformanceagainstnoiseundertheconditionofGaussnoise channel.Thecomparisonismadeonthespectrumandanti-noiseperformancebetweenπ/4-DQPSKandQPSK underthethesamechannel.Theresultofsimulationshowsthatthespectrumexpandingofπ/4-DQPSKissuperiortothatoftheQPSKsystem. Keywords:π/4-DQPSK;SystemView;computeraideddesign(CAD);Matlab
资源简介:Abstract:Thearticleismainlydevotedtothetheoryaswellastheachievementonthemodulationanddemodulationofπ/ 4-DQPSKsysteminthesoftwareSystemView.Besides,thearticleanalysesthedynamicandstatic behaviorsoftheπ/4-DQPSKsystemaswellastheperforman...
上传时间: 2014-01-05
上传用户:hopy
资源简介:Abstract:Noise frequency modulation(FM)jamming。which belongs to blanket jamming。is already become the main form ofnoise jamming at present。because the wideband was gained by it.Tne spectnlnl ofnoise FM jamming is analyzed by time dom...
上传时间: 2015-10-17
上传用户:lijinchuan
资源简介:Abstract:This article elaborats the RFID system,multianalysised the concrete function of RFID middleware,and proposed a kind of RFID data transmission design model with news transmission mechanism,for realizing data transmission more ...
上传时间: 2014-01-02
上传用户:yd19890720
资源简介:Abstract:It惴 described systematically the architecture and function of the software of Railway Auto-ticketing System as well as its charac— ter~tic and demand。Analysized the 8oftware middleware and messaged oriented middleware(MOM),d...
上传时间: 2016-05-14
上传用户:JasonC
资源简介:摘要:本文主要介绍以CPLD 芯片进行十字路口的交通灯的设计,用CPLD 作为交通灯控制器的主控芯片,采用VHDL 语言编写控制程序,利用CPLD的可重复编程和在动态系统重构的特性,大大地提高了数字系统设计的灵活性和通用性。 关键词:CPLD;VHDL;交通灯控制器...
上传时间: 2013-12-30
上传用户:bruce
资源简介:Construction Strategy of ESD Protection CircuitAbstract: The principles used to construct ESD protection on circuits and the basic conceptions of ESD protection design are presented.Key words:ESD protection/On circuit, ESD design window, ...
上传时间: 2013-11-09
上传用户:Aidane
资源简介:本文介绍了基于AT89C52 单片机的自动水温控制系统的设计及实现过程。该系统具有实时显示、温度测量、温度设定并能根据设定值对环境温度进行调节实现控温的目的以及达到上下限温度报警功能,控制算法是基于数字PID 算法。关键词 :PID AT89C52 脉宽调制 实时 A...
上传时间: 2013-10-10
上传用户:归海惜雪
资源简介:介绍了一种基于MSP430系列单片机和ADXL203加速度传感器的数字式倾角仪,它不仅可以实现水平度检测,而且可以测量00~3600范围内的任意倾角,分辨率可达O.1。。此外,由于该倾角仪输出为数字结果,因此它也可以与其他的数字设备结合起来,组合成一个功能更加...
上传时间: 2013-11-14
上传用户:lizhizheng88
资源简介:根据看门狗电路的原理,设计出简单适用、性能可靠的1TrL型看门狗电路以及价格低廉、性能可靠的微功耗CMOS型看门狗电路,同时还介绍了常用的uP监视器O型看门狗电路。关键词:看门狗电路;1TrL型;CMOS型Abstract:In accordance with the principle of WDT (Wa...
上传时间: 2013-11-05
上传用户:685
资源简介:PROTEUS VSM在单片机系统仿真中的应用::介绍了单片机系统仿真工具PROTEUS VSM 及其在单片机系统仿真中的应用,给出了具体的应用实例,详细地介绍了PROTEUS VSM 与Keil uVision3的接口方法。关键词:单片机;Keil uVision3;仿真;外围器件;PROTEUS VSM; Ab...
上传时间: 2013-11-16
上传用户:chenxichenyue