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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
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.
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
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
Spectrum-Hole-Detection
- 本文首先介绍了认知无线电的基本概念,对认知无线电在WRAN系统、UWB系统及WLAN系统等领域的应用分别进行了讨论。在此基础上,针对实现认知无线电的关键技术从理论上进行了探索,分析了影响认知网络正常工作的相关因素及认知网络对授权用户正常工作所形成的干扰。从理论上推导了在实现认知无线电系统所必须面对的弱信号低噪声比恶劣环境下,信号检测的相关方法和技术,并进行了数字滤波器的算法分析,指出了窗函数的选择原则。-The development of the wireless business resul
01301699
- CMOS在信号接收端的应用，Gilbert混频器的实现-A LINEARIZATION TECHNIQUE FOR RADIO FREQUENCY CMOS GILBERT- TYPE MIXERS
RFID
- RFID stands for Radio-Frequency IDentification. The acronym refers to small electronic devices that consist of a small chip and an antenna. The chip typically is capable of carrying 2,000 bytes of data or less. The RFID device serves the same p
RFID
- 射频识别技术(RFID)相对于传统的磁卡及IC卡技术具有非接触、阅读速度快、无磨损等特点。文章详细介绍了射频技术的工作原理、分类、以及相关应用。-Radio Frequency Identification (RFID) technology compared to conventional magnetic and non-contact IC card technology, reading speed, no wear. Article describes in detail the wo
433.92M-rf-design
- 433.92M SAWR射频振荡与发射电路之设计，模拟与实现, 非常详细的一个433 rf 设计文档-433.92 M SAWR radio frequency oscillation, and the design of firing circuit, simulation and implementation, a very detailed 433 rf design documents
AM-RADIO
- This m-file simulates the operation of the heterodyne section and demodulating section of a garden variety AM receiver. An array is created that represents the superposition of three separate RF carriers, each modulated at a different audio
RFID_blood
- The present work describes the design and manufacture of a prototype (currently in use) of an intelligent sensor for the tracking and monitoring of blood temperature and of hemoderivatives to be used in transfusions, over the entire process. Furt
1xEVDO_test_program
- agilen测试1xEV-DO的指导说明书，包含手动测试指导和GPIB命令编程控制指导；阅读该文档也能学到相关射频常识-Agilen test of 1xEV-DO instructions, including manual test guidance and command GPIB programming control instruction reading the document can also learn the related knowledge of radio frequ
Inmarsat-101
- inmarsat Terminal Components for Typical Aero-H/H+ – Satellite Data Unit – Radio Frequency Unit – High Power Amplifier – Cabin Interface Unit (R-C) – Control Display Unit (DLC-800, MIDU, GUI, etc.) – High Gain Antenna System
[Seybold_J]_Introduction_to_RF_Propagation(BookFi
- With the rapid expansion of wireless consumer products, there has been a considerable increase in the need for radio-frequency (RF) planning
[Qizheng_Gu]_RF_System_Design_of_Transceivers_for
- This book is about radio frequency (RF) transceiver system design for wireless communication systems. -This book is about radio frequency (RF) transceiver system design for wireless communication systems.
essay
- an introduction to Radio Frequency Identification Devices
Soft Frequency Reuse Scheme for UTRAN LTE
- The objective of UTRA evolution study item is to develop a framework for the evolution of the 3GPP radio-access technology
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)