نتایج جستجو برای: signal modulation
تعداد نتایج: 549152 فیلتر نتایج به سال:
nowadays, in the modern wars, radars have faced with many threats. therefore, low probability of interception (lpi) capability is considered as an important factor in military radars. on the other hand, research on the interception of their signals is started and so far several methods are presented for detection of these signals. by using of time-frequency techniques, we can estimate signal pa...
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...
This paper aims to describe a deterministic generation of extreme waves in a typical towing tank. Such a generation involves an input signal to be provided at the wave maker in such a way that at a certain position in the wave tank, say at a position of a tested object, a large amplitude wave emerges. For the purpose, we consider a model called a spatial-NLS describing the spatial propagation o...
Holographic memories use a photosensitive medium to record the optical interference pattern of a reference beam and a signal beam as a volumetric refractive index distribution. The modulation method used to impart the digital information onto the signal beam can greatly impact the efficiency and uniformity of media consumption, crosstalk among the recorded data, and ultimately, the storage capa...
اینورترهای الکترونیک قدرت برای مصارف متنوع صنعتی به وفور استفاده می شوند. به منظور فایق آمدن بر محدودیت های مربوط به نرخ ولتاژ و جریان کلیدهای نیمه هادی در کاربردهای قدرت بالا، اتصال سری و موازی کلیدها می تواند موثر باشد، اما این اتصالات مشکلات خاص خود را دارند. همچنین شکل موج پله ای در خروجی اینورتر دارای طیف هارمونیکی بهتری نسبت به شکل موج سه سطحی در فرکانس کلیدزنی پایین می باشد. لذا در سال ه...
background and aim: this study investigated whether objective temporal processing paradigms including voice-onset-time, speech-in-noise, and amplitude modulated-broad-band noise (am-bbn) are sensitive to disrupted temporal processing in elderly listeners with normal hearing (age-related-temporal processing deficit). methods: we evaluated 15 adults aged 64–80 years using behavioural measures of ...
In order to improve the effect of English teaching, this paper combines with intelligent algorithm construct an interactive teaching system for engineering education. process data processing, specifies time that a single pulse needs be maintained and controls counter maintain certain number FPGA clocks. Moreover, processing is completed in digital domain, modulation method quadrature amplitude ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید