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21.007  Articles
1 of 2.102 pages  |  10  records  |  more records»
The article is devoted to the development of a printed ultra-wideband miniature antenna that can be used for microwave radiometry. An antenna design with a ring-shaped radiator has been proposed, which provides reception of microwave radiation from biolog... see more

Objective. Improvement of results of surgical treatment in patients with coexistent pathology of anal channel (?CH) and rectum, using high-frequency (HF) electrosurgical (?S) ?pparatuses «ERBE ICC 200», «?F?»,  «KLS Martin», and apparatus of a radio-... see more

Cognitive radio is an intelligent wireless solution that aims to enhance the access to the radio spectrum. In this technology, secondary users sense the radio spectrum, select the best channel among a pool of free channels, and determine the optimal trans... see more

In the field of cognitive radio spectrum sensing, the adaptive silence period management mechanism (ASPM) has improved the problem of the low time-resource utilization rate of the traditional silence period management mechanism (TSPM). However, in the cas... see more

Objective. Comparative estimation of the pain syndrome in patients with concomitant pathology of anal channel and rectum after performance of combined operations, using modern high-frequency electro-surgical and radio-surgical apparatuses, as well as conv... see more

Observation of wireless channel using channel sounder method is needed in order to obtain the channel characteristics in the form of delay spread (Tm) and doppler spread (fD) parameters for optimizing the design of digital communication systems. This also... see more

It was well known from Shannon’s days that characteristics of the physical channel like attenuation, fadingand noise can impair reliable communication. But it was more recently that the beneficial side effects of channelcharacteristics in ensuring secret ... see more

In order to guarantee the quality of service (QoS) for primary users (PUs) and secondary users (SUs) in fading channel, a distributed power control algorithm is proposed based on convex optimization theory in underlay OFDM cognitive ra... see more

One of the major problems in Wireless Sensor Networks (WSNs) is the traffic congestion caused by increasing number of devices sharing the limited spectrum of the ISM (Industrial, Scientific, and Medical radio) band. As a result, a new concept of Cognitive... see more

1 of 2.102 pages  |  10  records  |  more records»