نتایج جستجو برای: image communication system
تعداد نتایج: 2746832 فیلتر نتایج به سال:
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 ...
wireless sensor networks (wsns) are one of the most interesting consequences of innovations in different areas of technology including wireless and mobile communications, networking, and sensor design. these networks are considered as a class of wireless networks which are constructed by a set of sensors. a large number of applications have been proposed for wsns. besides having numerous applic...
با توجه به نقش اینترنت و پخش برنامه های تلویزیونی و سرویس های مربوط به مخابرات و تلفن و روند ترکیب و همگرایی آنها سعی داریم به بررسی و تحقیق ومطالعه پیرامون موضوع پخش برنامه های شبکه های تلویزیونی اعم از برخط و غیر برخط و سفارشی بر حسب زمان و مکان مودر نظر کاربران بر روی انواع مختلف شبکه با استفاده از پروتکلهای اینترنت پرداخته و با در نظر گرفتن اینکه فناوری iptv بعنوان موضوع جدید مطرح شده در بی...
in the last two decades, the trend in healthcare information technology has been towards digital and multimedia concepts. the next generation of healthcare information systems will consist of a vast network of heterogeneous, autonomous and distributed imaging scanners, hospital information systems (his), medical information from clinical departments such as radiology information systems (ris), ...
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...
introduction: having a desirable image in a market can be considered as an asset for an organization. therefore, using proper approaches, managers of such organizations must monitor and manage the image of their organizations in order to achieve their organizational goals and their customer’s satisfaction. as an important sector of every society, managers of hospitals also must try their best t...
abstract cognizing environment in human vision-system is complex process. part of this process is perceiving image elements and attention signals in general. in the other hand, extracting special description from image elements. it is assumed that the environment scene is a kind of image. according to this description, it is justifiable to interpret image according to the gestalt theory princip...
Despite the existing medical infrastructure being limited in terms of interoperability, amount multimedia transferred over network and shared through various channels increases rapidly. In search consultations with colleagues, professionals consent their patients, usually exchange multimedia, mainly form images, by using standard instant messaging services which utilize lossy compression algori...
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