Abstract: High-performance base-station (BTS) receivers must meet half-IF spurious requirements, whichcan be achieved by using the proper RF mixer. To help engineers, this application note illustrates the
標(biāo)簽： BTS 如何設(shè)計(jì) 基站 性能
上傳時(shí)間： 2013-10-17
上傳用戶：daoxiang126
Abstract: This article describes the Antenna Interface Standards Group (AISG) standard in telecommunications and details itshardware implementation. It explains how a fully integrated transceiver such as the MAX9947 can help reduce space and cost, andsolve bus arbitrations in base-station tower equipment.
標(biāo)簽： AISG 硬件 分立收發(fā)器 控制系統(tǒng)
上傳時(shí)間： 2014-12-30
上傳用戶：wangchong
該系統(tǒng)以計(jì)算機(jī)為依托構(gòu)建中央信息處理系統(tǒng)CIPS（Central Information Processing System），以Pocket PC作為巡檢終端PS（Portable Station），采用SQL Server 2000關(guān)系型數(shù)據(jù)庫(kù)和SQL Server CE3.0嵌入式數(shù)據(jù)庫(kù)技術(shù)，集RFID技術(shù)、GPS定位技術(shù)、信息管理、信息傳輸?shù)榷囗?xiàng)技術(shù)于一體，完成信息在CIPS和PS之間的交互，實(shí)現(xiàn)巡檢信息的綜合處理。
標(biāo)簽： RFID GPS 智能巡檢系統(tǒng)
上傳時(shí)間： 2013-11-16
上傳用戶：stvnash
為了能夠滿足基站易于選址、優(yōu)質(zhì)快速的建站要求和易維護(hù)、低成本、高可靠的運(yùn)行要求，本文對(duì)以方艙來實(shí)現(xiàn)一體化結(jié)構(gòu)基站做出一番探討。從系統(tǒng)設(shè)計(jì)的觀點(diǎn)闡述了移動(dòng)通信高性能基站天線設(shè)計(jì)的幾個(gè)關(guān)鍵問題，介紹了智能天線技術(shù)在基站中的應(yīng)用，并且用HFSS軟件仿真了一種新型的對(duì)稱陣子天線，該天線駐波比小于2的帶寬可以達(dá)到60%，具有良好的寬頻帶特性。 Abstract: In order to meet the station construction requirement of easy site selection and fast base station， and meet the operational requirement of easy maintenance， low cost and high reliability， this paper discussed the unified architecture base station using shelter. Several key problems of high performance mobile communication base station antenna were illustrated from the view of system design， the application of smart antenna in base station was also introduced. And a novel dipole antenna was simulated by using HFSS， the VSWR of the antenna is less than 2， and the bandwidth was reach to 60%. So it has good broadband properties.
標(biāo)簽： 智能天線 基站 中的應(yīng)用
上傳時(shí)間： 2013-11-20
上傳用戶：linlin
This white paper discusses how market trends, the need for increased productivity, and new legislation have accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to market. This allows FPGA users to design their own customized safety controllers and provides a significant competitive advantage over traditional microcontroller or ASIC-based designs. Introduction The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in cases of failure. Examples of functional safety systems include train brakes, proximity sensors for hazardous areas around machines such as fast-moving robots, and distributed control systems in process automation equipment such as those used in petrochemical plants. The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was developed in the mid-1980s and has been revised several times to cover the technical advances in various industries. In addition, derivative standards have been developed for specific markets and applications that prescribe the particular requirements on functional safety systems in these industry applications. Example applications include process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC 62304), automotive (ISO 26262), power generation, distribution, and transportation. 圖Figure 1. Local Safety System
標(biāo)簽： FPGA 安全系統(tǒng)
上傳時(shí)間： 2013-11-14
上傳用戶：zoudejile
Abstract: This application note discusses the development and deployment of 3G cellular femtocell base stations. The technicalchallenges for last-mile residential connectivity and adding system capacity in dense urban environments are discussed, with 3Gfemtocell base stations as a cost-effective solution. Maxim's 3GPP TS25.104-compliant transceiver solution is presented along withcomplete radio reference designs such as RD2550. For more information on the RD2550, see reference design 5364, "FemtocellRadio Reference Designs Using the MAX2550–MAX2553 Transceivers."
標(biāo)簽： Base-Station Applications Single-Chip Transceiver
上傳時(shí)間： 2013-11-05
上傳用戶：超凡大師
Myself graduation project content, asp access does the news issue system, myself carefully manufacture, satisfies the general graduation project the request, the manager password is wwwfox, supports on the picture to pass on the news, the news classification, the special news, in the station searches, myself intensely recommend
標(biāo)簽： graduation carefully manufactu content
上傳時(shí)間： 2014-01-09
上傳用戶：康郎
Please read them carefully before you write the package to their specific functions (at least 20 characters). As far as possible not to let the station for the time you have spent on that amendment. Have to extract the password to the password
標(biāo)簽： carefully functions specific package
上傳時(shí)間： 2016-03-30
上傳用戶：小儒尼尼奧
Communication software and platform develop sketch map and content and wrap up and step the computer network, such multi-platform information, in order to offer its explanation relying mainly on stepping the platform of reference mainly as railway application,etc
標(biāo)簽： and Communication software platform
上傳時(shí)間： 2016-10-28
上傳用戶：cooran
Please carefully read the many features of your package and then write the specific function (at least 20 words). As far as possible not to let the station master of the time spent in the
標(biāo)簽： carefully the features function
上傳時(shí)間： 2013-12-16
上傳用戶：ouyangtongze
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