Today, our everyday life is almost impossible to detach from the influence of wireless mobile communication technologies. This global trend is growing exponentially, and the mobile-only data traffic is expected to exceed stationary data traffic. However, for further development of mobile communication, there is a major obstacle to overcome, which is the resource-paucity of portable devices relative to stationary hardware.
標(biāo)簽： LTE-Advanced Mechanism DRX
上傳時(shí)間： 2020-05-27
上傳用戶：shancjb
MIMO-OFDM is a key technology for next-generation cellular communications (3GPP-LTE, Mobile WiMAX, IMT-Advanced) as well as wireless LAN (IEEE 802.11a, IEEE 802.11n), wireless PAN (MB-OFDM), and broadcasting (DAB, DVB, DMB). This book provides a comprehensive introduction to the basic theory and practice of wireless channel modeling, OFDM, and MIMO, with MATLAB ? programs to simulate the underlying techniques on MIMO-OFDMsystems.Thisbookisprimarilydesignedforengineersandresearcherswhoare interested in learning various MIMO-OFDM techniques and applying them to wireless communications.
標(biāo)簽： Communications MIMO-OFDM Wireless MATLAB with
上傳時(shí)間： 2020-05-28
上傳用戶：shancjb
It was only a few years ago that “ubiquitous connectivity” was recognized as the future of wireless communication systems. In the era of ubiquitous connectivity, it was expected that the broadband mobile Internet experience would be pervasive, and seamless connectivity on a global scale would be no surprise at all. The quality of service would be guaranteed no matter when/where/what the users wanted with the connectivity. Connectivity would even be extended to object-to-object communication, where no human intervention was required. All objects would become capable of autonomous communication.
標(biāo)簽： Protocols Radio LTE-A LTE for and
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
Second-generation telecommunication systems, such as the Global System for Mobile Communications (GSM), enabled voice traffic to go wireless: the number of mobile phones exceeds the number of landline phones and the mobile phone penetration is approaching 100% in several markets. The data-handling capabilities of second-generation systems are limited, however, and third-generation systems are needed to provide the high bit-rate services that enable high-quality images and video to be transmitted and received, and to provide access to the Web with higher data rates.
標(biāo)簽： Evolution WCDMA UMTS HSPA LTE for and
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
Notwithstanding its infancy, wireless mesh networking (WMN) is a hot and growing field. Wireless mesh networks began in the military, but have since become of great interest for commercial use in the last decade, both in local area networks and metropolitan area networks. The attractiveness of mesh networks comes from their ability to interconnect either mobile or fixed devices with radio interfaces, to share information dynamically, or simply to extend range through multi-hopping.
標(biāo)簽： Multi-hop Networks WiMAX WiFi Mesh LTE and
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
CH340C+RT9013+MINI USB接口板 AD設(shè)計(jì)硬件原理圖+PCB文件,ALTIUM設(shè)計(jì)的2層板設(shè)計(jì)，包括完整的原理圖和PCB文件，主要器件如下：Library Component Count : 12Name Description----------------------------------------------------------------------------------------------------CAP CapacitorCC2640EM CC2630 ModuleCH340 CH340 USB 2 UARTCON11 Connector 11pinsCON12 Connector 12pinsCON3X2 Connector 5*2LED LEDRES ResistorRT9013 RT9013 3.3VSWITCH switch 6*6USB1 USB ConnectorsXDS110-Lte XDS110-Lite Target Interface
標(biāo)簽： ch340c rt9013 usb 接口 ad設(shè)計(jì)
上傳時(shí)間： 2021-11-24
上傳用戶：canderile
廣和通是中國(guó)首家A股上市的物聯(lián)網(wǎng)無(wú)線模組企業(yè)。致力于將可靠、便捷、安全、智能的無(wú)線通信解決方案普及至每一個(gè)物聯(lián)網(wǎng)應(yīng)用場(chǎng)景，豐富智慧生活。廣和通提供創(chuàng)新的5G、4G、3G、2G、NB-IoT、LTE-M、智能、車(chē)規(guī)級(jí)無(wú)線通信模組及物聯(lián)網(wǎng)應(yīng)用一站式無(wú)線通信解決方案 。廣和通擁有全球1000多名員工，產(chǎn)品及服務(wù)遍及100多個(gè)國(guó)家。
標(biāo)簽： 物聯(lián)網(wǎng)
上傳時(shí)間： 2021-12-26
上傳用戶：
SENT（Single Edge Nibble Transmission，單邊半字節(jié)傳輸）協(xié)議（如SAE J2716）適用于汽車(chē)及運(yùn)輸行業(yè)中對(duì)安全性要求嚴(yán)格和對(duì)成本敏感的應(yīng)用。
標(biāo)簽： 汽車(chē)通訊 sent協(xié)議
上傳時(shí)間： 2022-01-05
上傳用戶：
5G系統(tǒng)中F-OFDM算法設(shè)計(jì)5G 系統(tǒng)中 F-OFDM 算法設(shè)計(jì) 摘 要： 將 F ( filter ) - OFDM 的框架應(yīng)用在傳統(tǒng)的 LTE 系統(tǒng)上 。 利用該新的波形技術(shù) ， LTE 系統(tǒng)可以支持更加靈活的 參數(shù)配置， 滿足未來(lái) 5G 豐富的業(yè)務(wù)需求。 通過(guò)發(fā)射機(jī)子帶濾波器的設(shè)計(jì)， 相鄰子帶間的帶外泄漏 (OOB ) 可以被大幅度抑 制。 接收機(jī)采用匹配濾波機(jī)制實(shí)現(xiàn)各個(gè)子帶的解耦。 最后通過(guò)實(shí)驗(yàn)仿真， 比較 OFDM 系統(tǒng)和 F- OFDM 系統(tǒng)的誤塊率 (BLER ) 性能， 可以看到當(dāng)存在鄰帶干擾時(shí)， 后者通過(guò)子帶濾波器對(duì)干擾的抑制， 系統(tǒng)性能明顯優(yōu)于前者。 關(guān)鍵詞： F- OFDM ； 帶外泄漏 (OOB ) ；
標(biāo)簽： 5G
上傳時(shí)間： 2022-02-25
上傳用戶：
隨著汽車(chē)電子技術(shù)的發(fā)展，汽車(chē)作為一種融合了當(dāng)代多種高新技術(shù)的交通工具，需要采用越來(lái)越多的電子控制系統(tǒng)，這些復(fù)雜的系統(tǒng)控制需要檢測(cè)及交換大量數(shù)據(jù)，傳統(tǒng)的點(diǎn)對(duì)點(diǎn)控制方式不但布線復(fù)雜、昂貴，而且可靠性差、重量大維護(hù)成本高，已經(jīng)無(wú)法滿足現(xiàn)代汽車(chē)的通信要求，為了解決上面這些問(wèn)題，德國(guó)BOSCH公司的CAN總線控制應(yīng)運(yùn)而生，且日前得到了廣泛應(yīng)用。為了應(yīng)對(duì)當(dāng)前某些整車(chē)廠對(duì)車(chē)載CAN總線控制系統(tǒng)應(yīng)用的需求，以及解決由于沒(méi)有一個(gè)開(kāi)放的CAN應(yīng)用層協(xié)議，使不同配套廠的設(shè)備之間不能互操作的問(wèn)題論文以基于SAEJ939協(xié)議的汽車(chē)CAN總線控制系統(tǒng)設(shè)計(jì)與測(cè)試作為研究課題制定了基于SAEJ939協(xié)議的CAN應(yīng)用層協(xié)議并設(shè)計(jì)開(kāi)發(fā)了CAN總線控制模塊結(jié)合項(xiàng)目組已有的技術(shù)基礎(chǔ)，論文首先研究了CAN總線協(xié)議特點(diǎn)和實(shí)現(xiàn)該技術(shù)的要求，并研究分析了CAN總線的應(yīng)用層協(xié)議規(guī)范SAE939，在此基礎(chǔ)上，根據(jù)某整車(chē)廠需求，分別從網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)的總體設(shè)計(jì)、模塊的信號(hào)定義、信息發(fā)送周期選擇、報(bào)文優(yōu)先級(jí)分配以及節(jié)點(diǎn)地址定義等幾個(gè)方面設(shè)計(jì)制定了一套具有良好擴(kuò)展性的汽車(chē)CAN應(yīng)用層協(xié)議。此外，課題還完成了CAN總線控制模塊的全部硬件設(shè)計(jì)，通過(guò)軟件開(kāi)發(fā)實(shí)現(xiàn)了所制定的CAN應(yīng)用層協(xié)議以及各控制模塊的功能為了驗(yàn)證CAN總線系統(tǒng)設(shè)計(jì)方案和所制定的CAN應(yīng)用層協(xié)議的可行性，以及測(cè)試網(wǎng)絡(luò)性能，課題對(duì)CAN總線控制模塊和CAN網(wǎng)絡(luò)系統(tǒng)進(jìn)行CAN模塊的致性測(cè)試，CAN控制模塊通信功能測(cè)試，以及應(yīng)用cAN總線開(kāi)發(fā)工具 CANoe進(jìn)行的CAN總線仿真實(shí)驗(yàn)和整個(gè)系統(tǒng)平臺(tái)測(cè)試。通過(guò)研究這些實(shí)驗(yàn)和測(cè)試的結(jié)果驗(yàn)證了CAN總線控制系統(tǒng)的實(shí)時(shí)性、可靠性和穩(wěn)定性，證明了課題設(shè)計(jì)方案可行此外，誤題的研究也為實(shí)現(xiàn)具有自主知識(shí)產(chǎn)權(quán)的汽車(chē)CAN總線控制技術(shù)的產(chǎn)品化積累了經(jīng)驗(yàn)，課題也因此具備繼續(xù)研究開(kāi)發(fā)的意義和良好的經(jīng)濟(jì)的前景
標(biāo)簽： 汽車(chē)CAN總線
上傳時(shí)間： 2022-03-23
上傳用戶：fliang
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