JDY-40 采用 2.4G 技術(shù)開發(fā)，視距 120 米，采用串口通信接口，使用簡單快捷，只需要了解 串口知識就可以對 JDY-40 進行產(chǎn)品應用
上傳時間： 2022-06-19
上傳用戶：
串口通信2.4G nRF24L01無線通信模塊資料匯總（原理圖、上位機、例程、無線232通信程序等）.
上傳時間： 2022-06-20
上傳用戶：xsr1983
在傳輸速率方面，802.11n可以將WLAN的傳輸速率由目前802.11a及802.11g提供的54Mbps，提高到300Mbps甚至高達600Mbps.得益于將MIMO（多入多出）與OFDM（正交頻分復用）技術(shù)相結(jié)合而應用的MIMO OFDM技術(shù)，提高了無線傳輸質(zhì)量，也使傳輸速率得到極大提升。現(xiàn)有的802.11n無線AP/路由設(shè)備主要是150M和300M產(chǎn)品，這兩種產(chǎn)品的實用性較高，價格相對低廉。由于802.11n方案的規(guī)定，單天線產(chǎn)品只能是150M產(chǎn)品，只有雙/天線以上，才能達到更高的速度現(xiàn)有的802.11n無線網(wǎng)卡主要是150M（手機）、300M（主流筆記本），450M（蘋果筆記本）。使用的頻率分別為2.4G（所有設(shè)備均支持）和5G（少量手機和多數(shù)的蘋果設(shè)備）。盡管802.11n標稱的數(shù)據(jù)都很大，最大理論值達到了600M，但實際上由于信道污染、各類干擾、阻擋物等，并不可能達到這種速度由于現(xiàn)在蘋果設(shè)備的普及，5G的無線網(wǎng)卡均安裝在最新的MBP/MBA/IPAD中，因此使用5G的用戶也是較為可觀的。同時在較新的Windows筆記本中，雙頻無線網(wǎng)卡也還是越來越多的被應用。
標簽： 5G
上傳時間： 2022-06-20
上傳用戶：jason_vip1
驗證過的幾款2.4G PCB天線封裝，很實用的，拿來就用。
上傳時間： 2022-07-01
上傳用戶：shjgzh
文檔為4G移動通信系統(tǒng)中的多天線技術(shù)總結(jié)文檔，是一份不錯的參考資料，感興趣的可以下載看看，，，，，，，，，，，，，
上傳時間： 2022-07-01
上傳用戶：
無線模塊2.4G蛇形天線PCB封裝-LORA模塊專用
上傳時間： 2022-07-04
上傳用戶：
基于MTK7612/7628D的wifi2.4G和5G開發(fā)資料AP-MT7628_IPAILNA_MT7612E_IPAILNA_V18_2L_SPI_DDR2_COCLOCK_WS3050_20150224.pdf
上傳時間： 2022-07-04
上傳用戶：xsr1983
SPI方式STM32F103與2.4G模塊NRF24L01收發(fā)通訊
標簽： spi stm32f103 nrf24l01 收發(fā)通訊
上傳時間： 2022-07-05
上傳用戶：
PrefaceDuring the past years, there has been a quickly rising interest in radio access technologies for providingmobile as well as nomadic and fixed services for voice, video, and data. The difference indesign, implementation, and use between telecom and datacom technologies is also becoming moreblurred. One example is cellular technologies from the telecom world being used for broadband dataand wireless LAN from the datacom world being used for voice-over IP.Today, the most widespread radio access technology for mobile communication is digital cellular,with the number of users passing 5 billion by 2010, which is more than half of the world’s population.It has emerged from early deployments of an expensive voice service for a few car-borne users,to today’s widespread use of mobile-communication devices that provide a range of mobile servicesand often include camera, MP3 player, and PDA functions. With this widespread use and increasinginterest in mobile communication, a continuing evolution ahead is foreseen.This book describes LTE, developed in 3GPP (Third Generation Partnership Project) and providingtrue 4G broadband mobile access, starting from the first version in release 8 and through the continuingevolution to release 10, the latest version of LTE. Release 10, also known as LTE-Advanced,is of particular interest as it is the major technology approved by the ITU as fulfilling the IMTAdvancedrequirements. The description in this book is based on LTE release 10 and thus provides acomplete description of the LTE-Advanced radio access from the bottom up.Chapter 1 gives the background to LTE and its evolution, looking also at the different standardsbodies and organizations involved in the process of defining 4G. It also gives a discussion of the reasonsand driving forces behind the evolution.Chapters 2–6 provide a deeper insight into some of the technologies that are part of LTE and itsevolution. Because of its generic nature, these chapters can be used as a background not only for LTEas described in this book, but also for readers who want to understand the technology behind othersystems, such as WCDMA/HSPA, WiMAX, and CDMA2000.Chapters 7–17 constitute the main part of the book. As a start, an introductory technical overviewof LTE is given, where the most important technology components are introduced based onthe generic technologies described in previous chapters. The following chapters provide a detaileddescription of the protocol structure, the downlink and uplink transmission schemes, and the associatedmechanisms for scheduling, retransmission and interference handling. Broadcast operation andrelaying are also described. This is followed by a discussion of the spectrum flexibility and the associated
上傳時間： 2022-07-08
上傳用戶：
2.4g小車遙控智能小車設(shè)計資料，包括遙控器資料，可移植添加重力感應功能
上傳時間： 2022-07-10
上傳用戶：jason_vip1
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