نتایج جستجو برای: digital communication system
تعداد نتایج: 2685634 فیلتر نتایج به سال:
a phase-locked loop (pll) based frequency synthesizer is an important circuit that is used in many applications, especially in communication systems such as ethernet receivers, disk drive read/write channels, digital mobile receivers, high-speed memory interfaces, system clock recovery and wireless communication system. other than requiring good signal purity such as low phase noise and low spu...
در چندسال گذشته رادیو نرم افزاری به عنوان روشی مناسب و قابل انعطا در سیستمهای مخابرات دیجیتالی معرفی شده است. به وسیله تغییر در نرم افزار تمام استانداردهای ارسال و دریافت اطلاعات بدون تغییرات سخت افزاری در سیستم قابل پیاده سازی می باشند. پیشرفت در تکنولوژی دیجیتال کاهش قیمت و تکرارپذیری باعث رشد سریع رادیو نرم افزاری به عنوان روشی جذاب در گیرنده ها شده است. مبدل آنالوگ به دیجیتال اولین مرحله بر...
a significant problem in multicarrier communication systems is the necessity to reduce the value of papr (peak-to-average power ratio) of transmitting signal. in this thesis we study the effect of the system parameters such as coding and modulation types on papr and ultimate ber in a mc-cdma system. in this study we consider fading channel as well as the nonlinearity of transmitter’s amplifier ...
Computer aided design and computer aided modeling tools are becoming increasingly important in the design and performance evaluation of communication systems. In this work, we report on the computer simulation modeling study of terrestrial digital microwave radio transmission, using Block Oriented System Simulator package (BOSS). The work concentrates on semi-analytical error rate evaluation in...
چکیده ندارد.
The experimental study of a secure chaotic synchronized communication system is presented. The synchronization between two digital chaotic oscillators, serving as a transmitter-receiver scheme, is studied. The oscillators exhibit rich chaotic behavior and are unidirectionally coupled, forming a master-slave topology. Both the input information signal and the transmitted chaotic signal are digit...
this study aimed to gain an insight into whether computer-mediated communication (cmc) in the form of a digital forum can reflect gendered discursive practices. a great deal of research has now established that computer-mediated interactions embody gendered differences in the use of emoticons, but few studies have examined the potential effect of the gender of the emoticon-receiver on the frequ...
Introduction: The picture archiving and communication system is a digital device designed for processing, archiving and communicating medical images with different parts of hospitals, physicians and radiologists. Therefore, the current study aimed to determine the impact of the system on users’ satisfaction with imaging services before and after its implementation. Methods: This cross-secti...
one of the most common and important therapeutic tools used by physicians is prescription. the use of digital systems in the health field has many benefits and significant impacts on the health system. one of these systems is digital prescription. in this article, first, we will review the existing infrastructure and work done in this area, and then with a new perspective on health issues, we w...
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