講述zigbee的接口應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學術交流會論文,本文結合兩款芯片的上述特點設計出以MSP430為控制器、以CC2420為無線收發器的低功耗ZigBee節點,由這樣節點構成的無線傳感器網絡可以在不更換電池的情況下工作幾年。
上傳時間: 2013-07-08
上傳用戶:zhengzg
ZigBee技術入門的學習參考資料,ZigBee無線網絡協議是基于標準的七層開放式系統互聯(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)和介質接入控制子層(MAC)。ZigBee聯盟提供了網絡層和應用層(APL)框架的設計。其中應用層的框架包括了應用支持子層(APS)、ZigBee設備對象(ZDO)和由制造商制訂的應用對象。
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.并產生參考 電壓. (2)對從光感檢測器輸出的微弱電流信號轉成 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.
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,設計無線傳感器網絡數據采集系統。系統采用SZ05-ADV型無線通訊模塊組建Zigbee無線網絡,結合嵌入式系統的軟硬件技術,完成終端節點的8路傳感器信號的數據采集。現場8路信號通過前端處理后,分別送入C8051F020的12位A/D轉換器進行轉換。經過精確處理、存儲后的現場數據,通過Zigbee無線網絡傳送到上位機,系統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 系統設計
上傳時間: 2013-11-23
上傳用戶:dsgkjgkjg
本文以f1禁系統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卡門禁系統設 系計方法。首先簡單介紹了組成這個系統的非接觸式IC卡,然后詳細描述了其軟硬件設計的過程。在實際的應用 統設過程中已經驗證了該設計方法的合理性。
上傳時間: 2013-10-15
上傳用戶:takako_yang
關鍵詞Zigbee模塊,使用說明,應用筆記摘 要本文檔從應用經驗出發,提供客戶設計使用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