講述zigbee的接口應(yīng)用的具體程序和解釋。
上傳時間: 2013-04-24
上傳用戶:er1219
2005年全國單片機與嵌入式系統(tǒng)學術(shù)交流會論文,本文結(jié)合兩款芯片的上述特點設(shè)計出以MSP430為控制器、以CC2420為無線收發(fā)器的低功耗ZigBee節(jié)點,由這樣節(jié)點構(gòu)成的無線傳感器網(wǎng)絡(luò)可以在不更換電池的情況下工作幾年。
標簽: ZigBee MSP 430 無線傳感器網(wǎng)絡(luò)
上傳時間: 2013-07-08
上傳用戶:zhengzg
ZigBee技術(shù)入門的學習參考資料,ZigBee無線網(wǎng)絡(luò)協(xié)議是基于標準的七層開放式系統(tǒng)互聯(lián)(OSI)模型,但僅對那些涉及ZigBee的層予以定義。IEEE802.15.4標準定義了最下面的兩層:物理層(PHY)和介質(zhì)接入控制子層(MAC)。ZigBee聯(lián)盟提供了網(wǎng)絡(luò)層和應(yīng)用層(APL)框架的設(shè)計。其中應(yīng)用層的框架包括了應(yīng)用支持子層(APS)、ZigBee設(shè)備對象(ZDO)和由制造商制訂的應(yīng)用對象。
標簽: ZigBee
上傳時間: 2013-04-24
上傳用戶:baobao9437
Abstract: A digital RF modulator, an integrated solution that satisfies stringent DOCSIS RF-performancerequirements, takes advantage of modern technologies like high-performance wideband digital-to-analogconversion and CMOS technology scaling. This application note describes the concept and advantages ofa digital quadrature amplitude modulation (QAM) modulator that uses the direct-RF architecture to enablea cable access platform (CCAP) system.
上傳時間: 2013-10-20
上傳用戶:drink!
RF前置放大電路即讀取光碟片射頻信號的放大電路.其放大電路性能的好壞會直接影響到DVD-ROM產(chǎn)品性能的好壞.其主要功能如下: (1)對鐳射二極體供電進行控制.并產(chǎn)生參考 電壓. (2)對從光感檢測器輸出的微弱電流信號轉(zhuǎn)成 電壓信號進行放大處理.
上傳時間: 2013-11-22
上傳用戶:linlin
Designers of signal receiver systems often need to performcascaded chain analysis of system performancefrom the antenna all the way to the ADC. Noise is a criticalparameter in the chain analysis because it limits theoverall sensitivity of the receiver. An application’s noiserequirement has a signifi cant infl uence on the systemtopology, since the choice of topology strives to optimizethe overall signal-to-noise ratio, dynamic range andseveral other parameters. One problem in noise calculationsis translating between the various units used by thecomponents in the chain: namely the RF, IF/baseband,and digital (ADC) sections of the circuit.
標簽: 數(shù)字接收器 信號鏈 噪聲分析
上傳時間: 2014-12-05
上傳用戶:cylnpy
ZIGBEE遙控飛機電路圖
上傳時間: 2013-12-19
上傳用戶:immanuel2006
以C8051F020為核心處理器,設(shè)計無線傳感器網(wǎng)絡(luò)數(shù)據(jù)采集系統(tǒng)。系統(tǒng)采用SZ05-ADV型無線通訊模塊組建Zigbee無線網(wǎng)絡(luò),結(jié)合嵌入式系統(tǒng)的軟硬件技術(shù),完成終端節(jié)點的8路傳感器信號的數(shù)據(jù)采集。現(xiàn)場8路信號通過前端處理后,分別送入C8051F020的12位A/D轉(zhuǎn)換器進行轉(zhuǎn)換。經(jīng)過精確處理、存儲后的現(xiàn)場數(shù)據(jù),通過Zigbee無線網(wǎng)絡(luò)傳送到上位機,系統(tǒng)可達到汽車試驗中無線測試的目的。 Abstract: This paper designs a wireless sensor network system for data acquisition with C8051F020 as core processors.The system used SZ05-ADV wireless communication module,set up a Zigbee wireless network, combined with hardware and software technologies of embedded systems,completed the end-node 8-locale sensor signal data acquisition.Eight locale signals were sent separately into the 12-bit ADC of C8051F020 for conversion through front treatment.After accurate processing and storage,the locale data was transmitted to the host computer through Zigbee wireless.The system achieves the purpose of wireless testing in vehicle trial.
標簽: C8051F020 Zigbee 汽車測試 系統(tǒng)設(shè)計
上傳時間: 2013-11-23
上傳用戶:dsgkjgkjg
本文以f1禁系統(tǒng)的可靠性和低成本為立足點,提出了一種基于AT89C2051單片機的RF卡門禁系統(tǒng)設(shè) 系計方法。首先簡單介紹了組成這個系統(tǒng)的非接觸式IC卡,然后詳細描述了其軟硬件設(shè)計的過程。在實際的應(yīng)用 統(tǒng)設(shè)過程中已經(jīng)驗證了該設(shè)計方法的合理性。
上傳時間: 2013-10-15
上傳用戶:takako_yang
關(guān)鍵詞Zigbee模塊,使用說明,應(yīng)用筆記摘 要本文檔從應(yīng)用經(jīng)驗出發(fā),提供客戶設(shè)計使用CEL模塊ZICM2410模塊需要了解的信息。
上傳時間: 2013-10-10
上傳用戶:sy_jiadeyi
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