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通过对现有230MHz数传电台通信系统的分析
- 通过对现有230MHz数传电台通信系统的分析，结合目前先进的无线通信技术，分别从网络结构、信道利用、频谱利用和通信可靠性等几个方面分析了230 MHz频谱资源的利用问题，并提出提高230MHz频段无线资源利用的可行性方法建议。,Through the existing 230MHz data radio communications system analysis, combined with advanced wireless communications technology, separa
swlfreq
- 全球广播资源中心 v1.31 含全球最新最权威的AM,FM,SW 频率数据3万多个，尤其是短波，几乎无遗漏和错误，可 以智能化地找出当前时间正在播音的所有电台。数据库最 新更新时间为2000.8.2。-V1.31 Global Broadcasting Resource Center containing the latest and most authoritative global AM, FM, SW frequency data more than 30,000, in particul
jianyiwuxiandianyaokongxitong
- 简易无线电遥控系统利用高频载频信号将调制信号经由发射端天线送出，在接收端经接收天线接收，再经过解调和解码恢复原信号用来控制发光二极管的亮灭。-Simple radio-controlled system uses high-frequency modulated carrier frequency signal to the antenna signal sent by the transmitter, the receiver antenna by the receiver, after de
Defects_TD2SCDMA_Standards
- 从智能天线的工作原理出发说明使用智能天线时很难实现小区的分扇区应用、多频点天线公 用,因此可以证明智能天线还不是一项可供商用的实用技术 考虑相邻小区/扇区时隙的不对称分 配所产生的相邻小区/扇区收发干扰时,可以证明上、下行时隙实质上是不能按需分配的。3 G使 用的频段是2 GHz,具有传播衰落大、穿透能力差、不易做大范围覆盖。TD2SCDMA标准很难提供3 G标准所规定的在车载、步行、静止环境下分别达到144 kbit/ s、384 kbit/ s和2 048 kbit/ s的无
ddc
- Digital down-converters (DDC) are a key component for digital radio. The DDC performs the critical frequency translation needed to recover the information from a digitized modulated signal.
InterferenceevaluatioofBluetoothandIEEE802.11bsyst
- Interference evaluation of Bluetooth and IEEE 802.11 b systems-The emergence of several radio technologies, such as Bluetooth and IEEE 802.11, operating in the 2.4 GHz unlicensed ISM frequency band, may lead to signal interference and result
simplex_wireless_calling_system
- 单工无线呼叫系统分发射和接收两大部分。发射部分采用锁相环式频率合成器技术， MC145152和MC12022芯片组成锁相环，将载波频率精确锁定在35MHz，输出载波的稳定度达到4×10-5，准确度达到3×10-5，由变容二极管V149和集成压控振荡器芯片MC1648实现对载波的调频调制；末级功放选用三极管2SC1970，使其工作在丙类放大状态，提高了放大器的效率，输出功率达到设计要求。接收部分以超大规模AM/FM立体声收音集成芯片CXA1238S为主体，灵敏度、镜像抑制、信噪比等各项性能指标均达
ThesuitabilityofOFDMasamodulation
- This thesis investigates the effectiveness of Orthogonal Frequency Division Multiplexing (OFDM) as a modulation technique for wireless radio applications. The main aim was to assess the suitability of OFDM as a modulation technique for a fixed
jian yi wu xian yao kong
- 简易无线电遥控系统利用高频载频信号将调制信号经由发射端天线送出，在接收端经接收天线接收，再经过解调和解码恢复原信号用来控制发光二极管的亮灭。--Radio remote control system easy to use high-frequency modulated signal carrier frequency signal sent by the transmitter antennas, at the receiving end through the receiving ante
20070823003
- 自动识别系统电台的卞要功能是在接收状态将接收到的射频信号解调成高斯最小频移键控(GMSI})比特流以供信号处理板使用 而在发射状态则将来自处理板的9.6 kbps的GMSI}比特流调制成适合发射的射频信号并发射。木电台使用半双工方式工作，共用一副大线，其中发射通路只有一个通道，但可通过微处理器改变调制芯片LMX1501的内部设置数以产生两个频率，然后再经过卜变频得到中心频率分别为162.025 MHz和161.975 MHz的发射信号 木电台的接收则分为二路，其解调芯片都是用TA31136来实
Co-OFDM
- 光纤射频传输系统中相干正交频分复用的研究，介绍了系统的结构和性能,是一份很不错的学习材料。-Coherent optical fiber radio transmission system using orthogonal frequency division multiplexing, introduces the system structure and performance, is a very good learning materials.
ruanjianwuxiandian
- 软件无线电平台硬件设计，包括下变频的具体参数设计。-Software radio platform hardware design, including the specific parameters under the design frequency.
ETC
- 一篇关于ETC中射频识别系统的研究与开发的论文，分享出来给大家-A paper on the research and development of radio frequency identification system in ETC,share out for everyone to see.
Modulation
- modulation for radio frequency channel
Implementing-FM-in-GNU-radio
- step wise implementation of Frequency modulation in open source GNU radio software (gnu radio companion files and python files)
Aloha2
- 对射频识别中aloha算法的吞吐率、时延性能进行了仿真，并与帧时隙aloha算法进行了对比。-The throughput and delay performance of Aloha algorithm in radio frequency identification are simulated and compared with frame time slot Aloha algorithm.
WLAN_APrf
- wlan的ap的射频测试用例，对射频的测试进行详细的步骤说明，请需要的人员下载-Wlan ap rf test case, test detailed explanation of the steps for radio frequency (rf), please download need of personnel
RF_technology
- 射频技术漫谈,常见射频卡简介，射频识别技术漫谈(1)——概念、分类射频识别技术漫谈(2)——国际标准_潘春伟_新浪博客，射频识别技术漫谈(14)——Mifare?S50与S70的存取控制_潘春伟_新浪博客(On the common radio frequency technology, radio frequency card, a radio frequency identification (1) -- the concept and classification of radio fre
微波射频网[MWRF.NET]_阻抗匹配问题大全
- 从事射频方面可以认真读读，有一定程度的帮助(Radio frequency can be read carefully, to some extent help)
homedb
- 射频卡协议，射频识别，RFID（Radio Frequency Identification）技术，又称无线射频识别，是一种通信技术，可通过无线电讯号识别特定目标并读写相关数据，而无需识别系统与特定目标之间建立机械或光学接触。(Radio frequency identification, RFID (Radio Frequency Identification) technology, also known as radio frequency identification, is a kin