نتایج جستجو برای: rf because of low signal
تعداد نتایج: 21269979 فیلتر نتایج به سال:
extremely low frequency (elf) electromagnetic field (elf-emfs) are widely employed in electrical appliances and different equipment such as television sets, elf-emfs can affect biological systems by increasing production ros. the altered balance between ros generation and elimination plays a critical role in a variety of pathologic conditions. ros levels have been observed in several hematopo...
The radio frequency (RF) signal generation method using an external modulator is widely used in microwave photonics applications because it has the advantage of being able to generate coherent and stable RF signals with a higher resolution performance compared conventional method. A Mach–Zehnder as due its high electro-optic coefficients low attenuation characteristics but critical problem that...
Abstract — A new hybrid opto-electronic WDM architecture to extend electronic ADC performance is analyzed and simulated. Mode-locked optical pulses are amplitude modulated by a RF signal and optically demultiplexed into a number of parallel channels. The signal in each channel is converted to an electrical signal and then passed through a simple low-pass filter. The effect of low-pass filter re...
the application of e-learning systems - as one of the solutions to the issue of anywhere and anytime learning – is increasingly spreading in the area of education. content management - one of the most important parts of any e-learning system- is in the concern of tutors and teachers through which they can obtain means and paths to achieve the goals of the course and learning objectives. e-learn...
the purpose of this study was to investigate iranian efl learners’ beliefs about the role of rote learning (rl) in vocabulary learning strategies; besides, the study examined if english proficiency would influence learners’ vocabulary learning strategy use. this study addresses the need for a clear understanding of the role of rl in efl vocabulary learning by looking at iranian efl learners’ ow...
1,2 Anna University Abstract—Low noise amplifier is a crucial and essential component in RF receiver design. It amplifies the received weak RF signal with minimum noise contribution. Designing Low noise amplifier with CMOS technology is one of the important topics in research fields due to its advantages of low power, low cost and higher integration. Applications of LNA include WLAN, WSN and UW...
The number of wireless communication links is witnessing tremendous growth and new standards are being introduced at high pace. These standards heavily rely on digital signal processing, making CMOS the first technology of choice. However, RF CMOS circuit development is costly and time consuming due to mask costs and design iterations. This pleads for a Software Defined Radio approach, in which...
Joint RF-baseband interference cancellation to reduce receiver complexity and power consumption. Summary One of the major drawbacks towards the realization of MIMO and multi-sensor wireless communication systems is that multiple antennas at the receiver each have their own separate radio frequency (RF) front ends and analog to digital converter (ADC) units, leading to increased circuit size and...
abstract the variables affecting the nature of reading comprehension can be classified into two general categories: reader’s variables, and text variables (alderson, 2000). despite the wave of research on vocabulary knowledge as reader’s variable, the role of this knowledge in c-test as a text-dependent test and its interaction with lexical cohesion of the test as a text feature has remained a...
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