Free Space Optical Communication (FSOC) is an effective alternative technology to meet the Next Generation Network (NGN) demands as well as highly secured (mili- tary) communications. FSOC includes various advantages like last mile access, easy installation, free of Electro Magnetic Interference (EMI)/Electro Magnetic Compatibil- ity (EMC) and license free access etc. In FSOC, the optical beam propagation in the turbulentatmosphereisseverelyaffectedbyvariousfactorssuspendedinthechannel, geographicallocationoftheinstallationsite,terraintypeandmeteorologicalchanges. Therefore a rigorous experimental study over a longer period becomes significant to analyze the quality and reliability of the FSOC channel and the maximum data rate that the system can operate since data transmission is completely season dependent.
標(biāo)簽： Communication Optical System Space Free
上傳時間： 2020-05-27
上傳用戶：shancjb
053-Linux內(nèi)核源代碼(free);053-Linux內(nèi)核源代碼(free)
標(biāo)簽： linux
上傳時間： 2021-10-22
上傳用戶：xsr1983
Chrome-Setup-Lifetime-Free-3.7.0-master.zip
標(biāo)簽： chrome
上傳時間： 2022-06-26
上傳用戶：
由于低場磁共振自由感應(yīng)（FID-Free Induction Decay）信號十分微弱,信噪比低,所以信號放大電路的設(shè)計、調(diào)試具有一定的困難.該文首先對低場磁共振電路系統(tǒng)的各個功能模塊進行了分析,并估算了低場磁共振的信號幅值,然后重點對天線接口和前置放大兩個電路模塊進行了分析研究.天線接口電路是射頻發(fā)射電路、信號接收電路與磁體天線的接口電路.針對接收信號弱、信噪比低的情況,天線接口電路不但要實現(xiàn)天線的三個狀態(tài)（發(fā)射、泄放、接收）間的切換,而且要對信號進行無源放大.該文在完成了天線接口電路功能分析后,建立了簡化模型,然后對其參數(shù)進行分析計算,得出了滿足最大放大倍數(shù)和期望帶寬時的調(diào)試指導(dǎo)參數(shù),還據(jù)此設(shè)計了校驗信號發(fā)生電路.前置放大電路主要完成磁共振FID信號的有源放大.該文在進行了方案討論后,給出了具體的前置放大電路,并對其工作狀態(tài)進行了靜態(tài)工作點計算和動態(tài)仿真分析,計算了增益系數(shù),分析了帶寬,并作了噪聲分析.該文還參照高頻電路的設(shè)計特點,分析了低場磁共振信號放大電路的噪聲干擾的來源、種類;討論了器件選擇、電路布板等方面的注意事項;給出了減小噪聲干擾的一些具體措施.
上傳時間： 2013-06-01
上傳用戶：hanli8870
The driver of H-JTAG is open and free for ARM debug
上傳時間： 2013-05-18
上傳用戶：ynsnjs
VC與西門子PLC自由口通訊例程源碼-VC and Siemens PLC source free port communication routines
標(biāo)簽： SCommtest
上傳時間： 2013-06-14
上傳用戶：youth25
免費開源的遠程桌面程序，vnc客戶端源代碼，windows版本-Free open source remote desktop programs
標(biāo)簽： vncviewer_source 1.0
上傳時間： 2013-04-24
上傳用戶：@小小羊
查看CANDENCE ALLEGRO的GERBER文件
上傳時間： 2013-05-26
上傳用戶：thesk123
FPGA原理設(shè)計與應(yīng)用，請用dgreader free.exe打開
標(biāo)簽： FPGA
上傳時間： 2013-09-01
上傳用戶：gps6888
Abstract: Specifications such as noise, effective number of bits (ENOB), effective resolution, and noise-free resolution inlarge part define how accurate an ADC really is. Consequently, understanding the performance metrics related to noise isone of the most difficult aspects of transitioning from a SAR to a delta-sigma ADC. With the current demand for higherresolution, designers must develop a better understanding of ADC noise, ENOB, effective resolution, and signal-to-noiseratio (SNR). This application note helps that understanding.
標(biāo)簽： ENOB 模數(shù)轉(zhuǎn)換器
上傳時間： 2013-10-16
上傳用戶：x18010875091
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