铁道通信专业论文题目大全及答案英文翻译
铁道通信专业论文题目大全及答案英文翻译
(一)摘要摘要是毕业设计(论文)主要信息的简要陈述,具有独立性和完整性。摘要内容包括本论文研究目的、方法、结果、结论四部分。千万不要讲一些人们已经做过的工作。要开门见山地讲本文的主要工作。摘要分中文摘要和外文摘要,中文摘要在前,一般300字左右,外文摘要另起一页,内容应与中文摘要对应。 (二)正文毕业论文正文部分包括前言、主体和结论。前言作为开场白,应以简短的篇幅,说明毕业论文选题的目的和意义、国内外文献综述、研究的内容及预期目标,要求突出重点,实事求是。主体是毕业论文的核心部分,占主要篇幅。毕业论文正文字数一般要求在15000字以上。有创新的论文,字数不受限制。文中插入的图表要符合国家标准,经过精心设计后用计算机绘制,尽量避免扫描图表。结论是整个毕业论文的最后总结,完整、准确、简洁地指出以下内容:(1)毕业论文得到的结果所揭示的原理及其普遍规律;(2)研究中有无发现例外或本文尚难以解释和解决的问题;(3)与同类研究工作的异同;(4)进一步深入研究本课题的建议。(三)参考文献毕业设计(论文)要求有10篇以上的中外文参考文献,其中至少有一篇与设计(论文)内容相关的外文文献。毕业设计(论文)引用的文献应以近期发表的与毕业设计(论文)直接有关的文献为主。凡引用本人或他人已公开或未公开发表文献中的学术思想、观点或研究方法、设计方案等,不论借鉴、评论、综述,还是用做立论依据,都应编入参考文献目录。各条文献按在论文中的文献引用序号顺序排列。
CAN communications network used in CDMA communications system access channel property Much EUC communications terrace's design based on drive-by-wire diesel under the total lines in CAN 绝对标准!!
The application of CAN communication network in vehicleThe research of communication channel's trait in CDMA systemThe design of multiple ECU communication platform of CAN-bus based electric diesel engine
the application of CAN communication network in the research on CDMA communication network in connection to signal the design for multi EUC communication platform basing on CAN bus controlled electro-disel engine
铁道通信专业论文题目有哪些及答案英文翻译
Thinking of the Transportation SecurityAbstract: Analysis railway container transport empty containers back to send his way off, anonymous report name of the container cargo, container loading super partial load and emphasis, such as security issues, proposed to strengthen the container transport load consolidation, strict inspection standards, and reasonable to develop the program equipped with balanced load, the bottom of the container corner pieces of the latch in place, make full use of security equipment to ensure that the container transport security technology to ensure safety Container transport saving packaging, to facilitate mechanized operations, applicable to dry a variety of modes of transport, the way no need to flip goods, the current direction of development of the transport of China's railways since the l 955 years to carry out container transport, more than half a century of ups and downs, has been developed by leaps and During this period, from the handling of box point of view: has 5 t, 1 t, 5 t, 10 t of non-international standard, general-purpose container gradually evolve to the current 20 feet, 40 feet international standard general purpose container, but also the development of a bench box, plate rack containers, refrigerated containers, tank containers, dry bulk boxes and other special cargo container, and its economic and social benefits are very With the rapid development of China's economic construction, railway container transport will usher in a rapid development of a new period of container traffic safety management of the rapid growth of container transport will put forward new demands and In recent years, leaders at all levels attach importance to and properly managed, container freight stations, railway container transportation is basically Container but the ultra-eccentric load, emphasizing the anonymous report the name and other security risks occur, must pay close attention to seek the best solutions and
你都说的这么清楚了,还要样本干嘛啊?自己先构思,然后尽量去用通俗易懂的句子去翻译,你写的,才是最好的,相信自己
The Shenzhen subject park culture characteristic construction searchesanalyzes Since Shenzhen 1989th year the exquisite silk China subjectpark establishment, already some 18 years year, has followed timepassing, the Shenzhen subject park development situation actuallyalready with difficulty is comparing with the same Very manyscholars have the suspicion to the subject park construction allnewspaper the Certainly, in these 18 years development, theShenzhen subject park indeed has many problems, the subject park whichthe manner knows very few may Therefore, searches to thesubject park analyzes into the very many domestic scholars' direction,for example: Guaranteed continues just gentleman in to the subjectpark development influence factor analysis in, thought the source oftourists market and the transportation condition, the region economylevel of development, the city traveling sensation image, the spacegathered with the competition as well as the policy-maker behavior inplays the indelible role to the subject park development Regardingthis, I carry on own on the subject park culture characteristicanalysis, as well as proposes own Key word: Traveling culture, cultural marketing, subject park
铁道通信专业论文题目大全及答案英文
你都说的这么清楚了,还要样本干嘛啊?自己先构思,然后尽量去用通俗易懂的句子去翻译,你写的,才是最好的,相信自己
基于WIN CE的ADSL线路参数研究ADSL line parameters research based on WIN CE _EMC&dq=ADSL&printsec=frontcover&source=web&ots=oJXbatzNWO&sig=fyomvlADYeB7NRS2gjTJAfpSapQ--------------Windows CE (also known officially as Windows Embedded CE since version 0[2][3], and sometimes abbreviated WinCE) is a variation of Microsoft's Windows operating system for minimalistic computers and embedded Windows CE is a distinctly different kernel, rather than a trimmed-down version of desktop W It is not to be confused with Windows XP Embedded which is NT- It is supported on Intel x86 and compatibles, MIPS, ARM, and Hitachi SuperH FeaturesWindows CE is optimized for devices that have minimal storage—a Windows CE kernel may run in under a megabyte of Devices are often configured without disk storage, and may be configured as a “closed” system that does not allow for end-user extension (for instance, it can be burned into ROM) Windows CE conforms to the definition of a real-time operating system, with a deterministic interrupt It supports 256 priority levels and uses priority inheritance for dealing with priority The fundamental unit of execution is the This helps to simplify the interface and improve execution Microsoft has stated that the ‘CE’ is not an intentional initialism, but many people believe CE stands for ‘Consumer Electronics’ or ‘Compact Edition’; users often disparagingly called it “Wince”[4] Microsoft says it implies a number of Windows CE design precepts, including “Compact, Connectable, Compatible, Companion, and E”[5] The first version, known during development under the codename “Pegasus”, featured a Windows-like GUI and a number of Microsoft's popular applications, all trimmed down for smaller storage, memory, and speed of the palmtops of the Since then, Windows CE has evolved into a component-based, embedded, real-time operating It is no longer targeted solely at hand-held Many platforms have been based on the core Windows CE operating system, including Microsoft's AutoPC, Pocket PC 2000, Pocket PC 2002, Windows Mobile 2003, Windows Mobile 2003 SE, Windows Mobile 0, Windows Mobile 6, Smartphone 2002, Smartphone 2003 and many industrial devices and embedded Windows CE even powered select games for the Sega Dreamcast, was the operating system of the controversial Gizmondo handheld, and can partially run on modified Microsoft Xbox game A distinctive feature of Windows CE compared to other Microsoft operating systems is that large parts of it are offered in source code First, source code was offered to several vendors, so they could adjust it to their Then products like Platform Builder (an integrated environment for Windows CE OS image creation and integration, or customized operating system designs based on CE) offered several components in source code form to the general However, a number of core components that do not need adaptation to specific hardware environments (other than the CPU family) are still distributed in binary form Development toolsVisual StudioLate versions of Microsoft Visual Studio support projects for Windows CE / Windows Mobile, producing executable programs and platform images either as an emulator or attached by cable to an actual mobile A mobile device is not necessary to develop a CE The NET Compact Framework supports a subset of the NET Framework with projects in C# and VBNET, but not Managed C++Platform BuilderThis programming tool is used for building the platform (BSP + Kernel), device drivers (shared source or custom made) and also the This is a one step environment to get the system up and One can also use Platform Builder to export an SDK (standard development kit) for the target microprocessor (SuperH, x86, MIPS, ARM ) to be used with another associated tool set named Embedded Visual C++ (eVC)The Embedded Visual C++ tool is for development of embedded application for Windows CE based This tool can be used standalone using the SDK exported from Platform Builder or using the Platform Builder using the Platform Manager connectivity Relationship to Windows Mobile, Pocket PC, and SmartPhoneOften Windows CE, Windows Mobile, and Pocket PC are used This practice is not entirely Windows CE is a modular/componentized operating system that serves as the foundation of several classes of Some of these modules provide subsets of other components' features ( varying levels of windowing support; DCOM vs COM), others which are mutually exclusive (Bitmap or TrueType font support), and others which add additional features to another One can buy a kit (the Platform Builder) which contains all these components and the tools with which to develop a custom Applications such as Excel Mobile/Pocket Excel are not part of this The older Handheld PC version of Pocket Word and several other older applications are included as samples, Windows Mobile is best described as a subset of platforms based on a Windows CE Currently, Pocket PC (now called Windows Mobile Classic), SmartPhone (Windows Mobile Standard), and PocketPC Phone Edition (Windows Mobile Professional) are the three main platforms under the Windows Mobile Each platform utilizes different components of Windows CE, as well as supplemental features and applications suited for their respective Pocket PC and Windows Mobile is a Microsoft-defined custom platform for general PDA use, and consists of a Microsoft-defined set of minimum profiles (Professional Edition, Premium Edition) of software and hardware that is The rules for manufacturing a Pocket PC device are stricter than those for producing a custom Windows CE-based The defining characteristics of the Pocket PC are the digitizer as the primary Human Interface Device and its extremely portable The SmartPhone platform is a feature rich OS and interface for cellular phone SmartPhone offers productivity features to business users, such as email, as well as multimedia capabilities for The SmartPhone interface relies heavily on joystick navigation and PhonePad Devices running SmartPhone do not include a touchscreen SmartPhone devices generally resemble other cellular handset form factors, whereas most Phone Edition devices use a PDA form factor with a larger Windows Mobile 5 supports USB 0 and new devices running this OS will also conform to the USB Mass Storage Class, meaning the storage on PPC can be accessed from any USB-equipped PC, without requiring any extra software, except requiring a compliant In other words, you can use it as a flash Competing productsCompetitors to consumer CE based PDA platforms like Pocket PC – the main application of Windows CE – are Java, Symbian OS, Palm OS, iPhone OS and Linux based packages like Qtopia Embedded Linux environment from Trolltech, Convergent Linux Platform from a La Mobile, and Access Linux Platform from Orange and AThe secondary usage of CE is in devices in need of graphical user interfaces, (point of sale terminals, media centers, web tablets, thin clients) as the main selling point CE is the look and feel being similar to desktop W The competition is Windows XP, Linux and graphical packages for simpler embedded operating Being an RTOS, Windows CE is also theoretically a competitor to any realtime operating system in the embedded space, like VxWorks, ITRON or eC The dominating method, however, of mixing Windows look and feel with realtime on the same hardware, is to run double operating systems using some virtualization technology, like TRANGO Hypervisor from TRANGO Virtual Processors or Intime from TenAsys in the case of Windows, and OS Ware from VirtualLogix, Padded Cell from Green Hills Software, OKL4 from Open Kernel Labs, TRANGO Hypervisor from TRANGO Virtual Processors, RTS Hypervisor from Real-Time Systems or PikeOS from Sysgo, in case of the ---------Asymmetric Digital Subscriber Line (ADSL) is a form of DSL, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can It does this by utilizing frequencies that are not used by a voice telephone A splitter - or microfilter - allows a single telephone connection to be used for both ADSL service and voice calls at the same Because phone lines vary in quality and were not originally engineered with DSL in mind, it can generally only be used over short distances, typically less than 3mi (5 km) [William Stallings' book]At the telephone exchange the line generally terminates at a DSLAM where another frequency splitter separates the voice band signal for the conventional phone Data carried by the ADSL is typically routed over the telephone company's data network and eventually reaches a conventional internet In the UK under British Telecom the data network in question is its ATM network which in turn sends it to its IP network IP CThe distinguishing characteristic of ADSL over other forms of DSL is that the volume of data flow is greater in one direction than the other, it is Providers usually market ADSL as a service for consumers to connect to the Internet in a relatively passive mode: able to use the higher speed direction for the "download" from the Internet but not needing to run servers that would require high speed in the other There are both technical and marketing reasons why ADSL is in many places the most common type offered to home On the technical side, there is likely to be more crosstalk from other circuits at the DSLAM end (where the wires from many local loops are close to each other) than at the customer Thus the upload signal is weakest at the noisiest part of the local loop, while the download signal is strongest at the noisiest part of the local It therefore makes technical sense to have the DSLAM transmit at a higher bit rate than does the modem on the customer Since the typical home user in fact does prefer a higher download speed, the telephone companies chose to make a virtue out of necessity, hence ADSL On the marketing side, limiting upload speeds limits the attractiveness of this service to business customers, often causing them to purchase higher cost Digital Signal 1 services In this fashion, it segments the digital communications market between business and home usersHow ADSL worksOn the wireCurrently, most ADSL communication is full Full duplex ADSL communication is usually achieved on a wire pair by either frequency division duplex (FDD), echo canceling duplex (ECD), or time division duplexing (TDD) FDM uses two separate frequency bands, referred to as the upstream and downstream The upstream band is used for communication from the end user to the telephone central The downstream band is used for communicating from the central office to the end With standard ADSL (annex A), the band from 875 kHz to 138 kHz is used for upstream communication, while 138 kHz – 1104 kHz is used for downstream Each of these is further divided into smaller frequency channels of 3125 kH During initial training, the ADSL modem tests which of the available channels have an acceptable signal-to-noise The distance from the telephone exchange, noise on the copper wire, or interference from AM radio stations may introduce errors on some By keeping the channels small, a high error rate on one frequency thus need not render the line unusable: the channel will not be used, merely resulting in reduced throughput on an otherwise functional ADSL Vendors may support usage of higher frequencies as a proprietary extension to the However, this requires matching vendor-supplied equipment on both ends of the line, and will likely result in crosstalk issues that affect other lines in the same There is a direct relationship between the number of channels available and the throughput capacity of the ADSL The exact data capacity per channel depends on the modulation method [edit] ModulationADSL initially existed in two flavours (similar to VDSL), namely CAP and DMT CAP was the de facto standard for ADSL deployments up until 1996, deployed in 90 percent of ADSL installs at the However, DMT was chosen for the first ITU-T ADSL standards, G1 and G2 (also called Gdmt and Glite respectively) Therefore all modern installations of ADSL are based on the DMT modulation Annexes J and M shift the upstream/downstream frequency split up to 276 kHz (from 138 kHz used in the commonly deployed annex A) in order to boost upstream Additionally, the "all-digital-loop" variants of ADSL2 and ADSL2+ (annexes I and J) support an extra 256 kbit/s of upstream if the bandwidth normally used for POTS voice calls is allocated for ADSL While the ADSL access utilizes the 1 MHz band, ADSL2+ utilizes the 2 MHz The downstream and upstream rates displayed are theoretical Note also that because Digital subscriber line access multiplexers and ADSL modems may have been implemented based on differing or incomplete standards some manufacturers may advertise different For example, Ericsson has several devices that support non-standard upstream speeds of up to 2 Mbit/s in ADSL2 and ADSL2+[edit] Installation issuesDue to the way it uses the frequency spectrum, ADSL deployment presents some It is necessary to install appropriate frequency filters at the customer's premises, to avoid interferences with the voice service, while at the same time taking care to keep a clean signal level for the ADSL In the early days of DSL, installation required a technician to visit the A splitter was installed near the demarcation point, from which a dedicated data line was This way, the DSL signal is separated earlier and is not attenuated inside the customer However, this procedure is costly, and also caused problems with customers complaining about having to wait for the technician to perform the As a result, many DSL vendors started offering a self-install option, in which they ship equipment and instructions to the Instead of separating the DSL signal at the demarcation point, the opposite is done: the DSL signal is "filtered off" at each phone outlet by use of a low pass filter, also known as This method does not require any rewiring inside the customer A side effect of the move to the self-install model is that the DSL signal can be degraded, especially if more than 5 voiceband devices are connected to the The DSL signal is now present on all telephone wiring in the building, causing attenuation and A way to circumvent this is to go back to the original model, and install one filter upstream from all telephone jacks in the building, except for the jack to which the DSL modem will be Since this requires wiring changes by the customer and may not work on some household telephone wiring, it is rarely It is usually much easier to install filters at each telephone jack that is in
铁道信号频率的实时高精度检测对于列车运行安全、绘制列车运行曲线图有非常重要的作用。其中,基带低频和上下边频是铁道信号检测主要的测量对象,是列车控制系统中主要的研究内容。我国铁路信号主要有两种制式,从兼容性方面来讲,需要可以同时检测两种制式信号低频和边频的算法;从实时高精度检测来讲,需要复杂度低,易于实现的算法。但铁道信号频率高精度检测,尤其是上下边频的检测尤为困难。目前对于铁道信号频率检测的检测方法中,基于欠采样技术的检测方法虽能提高频率分辨率,但采样波形失真度大,频率检测精度受到影响;基于数字正交I、Q双通道处理并重采样法,此法不能兼容我国铁路主要的两种制式。而现有的FFT检测方法,边频检测没有用到低频检测的结果,导致算法复杂;低频和边频的频谱校正法不同,校正算法不能通用;边频检测时,采用相位不变性判断边频边界,抗噪声性能太差。上述所有方法,基带低频与上下边频完全独立检测。针对以上算法的兼容性差、低频和边频检测独立进行这两个问题,本文提出了一种基频和边频频率检测相结合的铁道信号检测方法,算法中边频的检测充分利用低频检测结果。为提高检测精度,在频谱分析时,采用抑制频谱泄露性能较高的全相位FFT。为简化算法的复杂度,选取了同时适用于基频和边频的频率校正方法,有利于实时检测。低频检测时,针对采样频率增加了抽取算法,保证低频与边频在同一采样频率下检测信号频率。该法可以满足两种制式,其实用价值较高。铁道信号边频检测的难点是边界点的判断,针对这一问题,提出了一种新的边界检测算法。本文利用基带低频的抽取序列,设计了根据低频信号幅值跳变来判断铁道信号的上下边频的边界。然后根据低频的频率检测结果,计算出稳定的边频采样序列。改进后的边界判断算法,比基于“相位不变性”的边界检测算法减少一次FFT变换,算法复杂度明显降低,且抗噪性能只受低频幅值影响,边界识别性能优良。在Matlab和Quartus平台上模拟铁道信号,验证上述设计算法的可行性,分析了影响频率检测精度的原因。实验证明,在信噪比为8dB的情况下,仍能准确高精度的判断低频和载频频率,抗噪性能优越。 [1] 陈宏,孙俊杰,韩捷,郝伟 基于极值法和重心法的离散频谱校正方法[J] 振动测试与诊断 2012(S1)[2] 孙玉梅 基于FPGA的FSK调制解调器的设计及实现[J] 电子科技 2009(05)[3] 郜洪民,徐意,陈广山 DDS直接数字频率合成技术在铁路信号系统中的应用[J] 电子产品世界 2008(09)[4] 黄翔东,何宇清,李长滨 一种检测铁路2FSK信号频率的新方法[J] 天津大学学报 2007(09)[5] 袁博,宋万杰,吴顺君 基于FPGA的MATLAB与QuartusⅡ联合设计技术研究[J] 电子工程师 2007(01)[6] 吴宗慧,李杭生 铁路系统车载FSK信号检测系统的实现[J] 铁路计算机应用 2005(10)[7] 魏敏 VHDL硬件仿真结果的MATLAB分析法[J] 计算机应用与软件 2003(08)[8] 郜洪民,贾学祥,赵海东 铁路专用2FSK调制信号生成方法的研究[J] 中国铁道科学 2002(04)[9] 王庆文,孟宪德 车载FSK信号的实时高精度检测与DSP实现[J] 通信学报 2001(09)[10] 孙艳朋,贾利民,范明 小波包方法在车载FSK信号中的应用[J] 铁道学报 2001(02)
标题:CAN BUS used in the monitoring system of the electric vehicle
铁道通信专业论文题目大全及答案英文版
铁道通信可以写隧道内信号增强或者相关的领域。之前我也苦于写不出,还是学长给的文方网,写的《浅谈网络技术在铁道通信中的应用》,很快就过关了关于电气化铁道通信电磁防护措施的研究高职铁道通信信号专业顶岗实习现状与对策研究浅谈铁道通信信号专业的课程改革与实践电气化铁道通信线路的电磁防护浅析高职铁道通信信号专业教学质量的提高交流电气化铁道通信电磁防护的研究铁道通信信号专业实践教学体系构建的研究与实践高职铁道通信信号专业人才培养方案的研究与实践铁道通信用直埋式综合光缆湖南铁路科技职业技术学院铁道通信信号校企合作为例铁道通信信号专业相对动态教学计划的实践用“双闭环”控制理论指导铁道通信信号专业中高职衔接人才培养方案建设用“以岗导学、岗学融合”原则构建高职铁道通信技术专业课程体系铁道通信信号专业实践条件建设利旧情况探讨
你都说的这么清楚了,还要样本干嘛啊?自己先构思,然后尽量去用通俗易懂的句子去翻译,你写的,才是最好的,相信自己
学术堂整理了十五个通信工程毕业论文题目供大家进行参考: 1、高移动无线通信抗多普勒效应技术研究进展 2、携能通信协作认知网络稳态吞吐量分析和优化 3、协作通信中基于链路不平衡的中继激励 4、时间反转水声通信系统的优化设计与仿真 5、散射通信系统电磁辐射影响分析 6、无人机激光通信载荷发展现状与关键技术 7、数字通信前馈算法中的最大似然同步算法仿真 8、沙尘暴对对流层散射通信的影响分析 9、测控通信系统中低延迟视频编码传输方法研究 10、传输技术在通信工程中的应用与前瞻 11、城市通信灯杆基站建设分析 12、电子通信技术中电磁场和电磁波的运用 13、关于军事通信抗干扰技术进展与展望 14、城轨无线通信系统改造方案研究 15、无线通信系统在天津东方海陆集装箱码头中的运用
铁道信号频率的实时高精度检测对于列车运行安全、绘制列车运行曲线图有非常重要的作用。其中,基带低频和上下边频是铁道信号检测主要的测量对象,是列车控制系统中主要的研究内容。我国铁路信号主要有两种制式,从兼容性方面来讲,需要可以同时检测两种制式信号低频和边频的算法;从实时高精度检测来讲,需要复杂度低,易于实现的算法。但铁道信号频率高精度检测,尤其是上下边频的检测尤为困难。目前对于铁道信号频率检测的检测方法中,基于欠采样技术的检测方法虽能提高频率分辨率,但采样波形失真度大,频率检测精度受到影响;基于数字正交I、Q双通道处理并重采样法,此法不能兼容我国铁路主要的两种制式。而现有的FFT检测方法,边频检测没有用到低频检测的结果,导致算法复杂;低频和边频的频谱校正法不同,校正算法不能通用;边频检测时,采用相位不变性判断边频边界,抗噪声性能太差。上述所有方法,基带低频与上下边频完全独立检测。针对以上算法的兼容性差、低频和边频检测独立进行这两个问题,本文提出了一种基频和边频频率检测相结合的铁道信号检测方法,算法中边频的检测充分利用低频检测结果。为提高检测精度,在频谱分析时,采用抑制频谱泄露性能较高的全相位FFT。为简化算法的复杂度,选取了同时适用于基频和边频的频率校正方法,有利于实时检测。低频检测时,针对采样频率增加了抽取算法,保证低频与边频在同一采样频率下检测信号频率。该法可以满足两种制式,其实用价值较高。铁道信号边频检测的难点是边界点的判断,针对这一问题,提出了一种新的边界检测算法。本文利用基带低频的抽取序列,设计了根据低频信号幅值跳变来判断铁道信号的上下边频的边界。然后根据低频的频率检测结果,计算出稳定的边频采样序列。改进后的边界判断算法,比基于“相位不变性”的边界检测算法减少一次FFT变换,算法复杂度明显降低,且抗噪性能只受低频幅值影响,边界识别性能优良。在Matlab和Quartus平台上模拟铁道信号,验证上述设计算法的可行性,分析了影响频率检测精度的原因。实验证明,在信噪比为8dB的情况下,仍能准确高精度的判断低频和载频频率,抗噪性能优越。 [1] 陈宏,孙俊杰,韩捷,郝伟 基于极值法和重心法的离散频谱校正方法[J] 振动测试与诊断 2012(S1)[2] 孙玉梅 基于FPGA的FSK调制解调器的设计及实现[J] 电子科技 2009(05)[3] 郜洪民,徐意,陈广山 DDS直接数字频率合成技术在铁路信号系统中的应用[J] 电子产品世界 2008(09)[4] 黄翔东,何宇清,李长滨 一种检测铁路2FSK信号频率的新方法[J] 天津大学学报 2007(09)[5] 袁博,宋万杰,吴顺君 基于FPGA的MATLAB与QuartusⅡ联合设计技术研究[J] 电子工程师 2007(01)[6] 吴宗慧,李杭生 铁路系统车载FSK信号检测系统的实现[J] 铁路计算机应用 2005(10)[7] 魏敏 VHDL硬件仿真结果的MATLAB分析法[J] 计算机应用与软件 2003(08)[8] 郜洪民,贾学祥,赵海东 铁路专用2FSK调制信号生成方法的研究[J] 中国铁道科学 2002(04)[9] 王庆文,孟宪德 车载FSK信号的实时高精度检测与DSP实现[J] 通信学报 2001(09)[10] 孙艳朋,贾利民,范明 小波包方法在车载FSK信号中的应用[J] 铁道学报 2001(02)
铁道通信专业论文题目大全及答案初中英语
学术堂整理了十五个通信工程毕业论文题目供大家进行参考: 1、高移动无线通信抗多普勒效应技术研究进展 2、携能通信协作认知网络稳态吞吐量分析和优化 3、协作通信中基于链路不平衡的中继激励 4、时间反转水声通信系统的优化设计与仿真 5、散射通信系统电磁辐射影响分析 6、无人机激光通信载荷发展现状与关键技术 7、数字通信前馈算法中的最大似然同步算法仿真 8、沙尘暴对对流层散射通信的影响分析 9、测控通信系统中低延迟视频编码传输方法研究 10、传输技术在通信工程中的应用与前瞻 11、城市通信灯杆基站建设分析 12、电子通信技术中电磁场和电磁波的运用 13、关于军事通信抗干扰技术进展与展望 14、城轨无线通信系统改造方案研究 15、无线通信系统在天津东方海陆集装箱码头中的运用
tx027数字通信系统数据纠检错方法研究 tx028WCDMA移动通信中功率控制的研究与仿真 tx029无线网络优化研究 tx030移动通信的切换技术的研究 tx031基于网络的虚拟仪器测试系统 tx032基于GSM模块的车载防盗系统设计 tx033基于GSM短信模块的家庭防盗报警系统 tx034电信运营商收入保障系统设计与实现 tx035单片机串行通信发射机 tx036FDM通信系统基带数据 tx037CDMA通信系统中的接入信道部分进行仿真与分析 tx038基于连续隐马尔科夫模型的语音识别 tx039GPRS无线通讯技术的应用—GPRS短消息接收的开发和实现 tx040基于ARQ的数字通信系统纠检错方法 tx041数字通信系统数据帧同步设计及可靠性研究 tx042GSM扩容工程网络规划设计 tx043WCDMA的网络规划及优化 tx044WCDMA移动通信中功率控制的研究与仿真 tx045可接收数字广播节目的CDMA移动终端的软件设计 tx046可接收数字广播节目的GSM移动终端的硬件设计 tx047基于Matlab的OFDM系统仿真 tx048基于小波变换及其在信号和图象处理中的应用研究 tx049小波变换及其在信号和图象处理中的应用研究 tx050小灵通基站的开关电源设计 tx051数字通信系统数据纠检错方法研究 更多最新最全的通信毕业论文设计题目:
铁道信号频率的实时高精度检测对于列车运行安全、绘制列车运行曲线图有非常重要的作用。其中,基带低频和上下边频是铁道信号检测主要的测量对象,是列车控制系统中主要的研究内容。我国铁路信号主要有两种制式,从兼容性方面来讲,需要可以同时检测两种制式信号低频和边频的算法;从实时高精度检测来讲,需要复杂度低,易于实现的算法。但铁道信号频率高精度检测,尤其是上下边频的检测尤为困难。目前对于铁道信号频率检测的检测方法中,基于欠采样技术的检测方法虽能提高频率分辨率,但采样波形失真度大,频率检测精度受到影响;基于数字正交I、Q双通道处理并重采样法,此法不能兼容我国铁路主要的两种制式。而现有的FFT检测方法,边频检测没有用到低频检测的结果,导致算法复杂;低频和边频的频谱校正法不同,校正算法不能通用;边频检测时,采用相位不变性判断边频边界,抗噪声性能太差。上述所有方法,基带低频与上下边频完全独立检测。针对以上算法的兼容性差、低频和边频检测独立进行这两个问题,本文提出了一种基频和边频频率检测相结合的铁道信号检测方法,算法中边频的检测充分利用低频检测结果。为提高检测精度,在频谱分析时,采用抑制频谱泄露性能较高的全相位FFT。为简化算法的复杂度,选取了同时适用于基频和边频的频率校正方法,有利于实时检测。低频检测时,针对采样频率增加了抽取算法,保证低频与边频在同一采样频率下检测信号频率。该法可以满足两种制式,其实用价值较高。铁道信号边频检测的难点是边界点的判断,针对这一问题,提出了一种新的边界检测算法。本文利用基带低频的抽取序列,设计了根据低频信号幅值跳变来判断铁道信号的上下边频的边界。然后根据低频的频率检测结果,计算出稳定的边频采样序列。改进后的边界判断算法,比基于“相位不变性”的边界检测算法减少一次FFT变换,算法复杂度明显降低,且抗噪性能只受低频幅值影响,边界识别性能优良。在Matlab和Quartus平台上模拟铁道信号,验证上述设计算法的可行性,分析了影响频率检测精度的原因。实验证明,在信噪比为8dB的情况下,仍能准确高精度的判断低频和载频频率,抗噪性能优越。 [1] 陈宏,孙俊杰,韩捷,郝伟 基于极值法和重心法的离散频谱校正方法[J] 振动测试与诊断 2012(S1)[2] 孙玉梅 基于FPGA的FSK调制解调器的设计及实现[J] 电子科技 2009(05)[3] 郜洪民,徐意,陈广山 DDS直接数字频率合成技术在铁路信号系统中的应用[J] 电子产品世界 2008(09)[4] 黄翔东,何宇清,李长滨 一种检测铁路2FSK信号频率的新方法[J] 天津大学学报 2007(09)[5] 袁博,宋万杰,吴顺君 基于FPGA的MATLAB与QuartusⅡ联合设计技术研究[J] 电子工程师 2007(01)[6] 吴宗慧,李杭生 铁路系统车载FSK信号检测系统的实现[J] 铁路计算机应用 2005(10)[7] 魏敏 VHDL硬件仿真结果的MATLAB分析法[J] 计算机应用与软件 2003(08)[8] 郜洪民,贾学祥,赵海东 铁路专用2FSK调制信号生成方法的研究[J] 中国铁道科学 2002(04)[9] 王庆文,孟宪德 车载FSK信号的实时高精度检测与DSP实现[J] 通信学报 2001(09)[10] 孙艳朋,贾利民,范明 小波包方法在车载FSK信号中的应用[J] 铁道学报 2001(02)