Ghanshyam Singh

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In this study, a repeated correlative coding scheme is proposed to combat the inter-carrier interference (ICI) caused by the frequency offset in orthogonal frequency division multiplexing (OFDM) communication systems. This proposed scheme combine two ideas of the well-known methods, which are the coding of adjacent subcarriers with antipodal of the same(More)
For optimal treatment planning, a meticulous diagnosis is the need of hour. This article focuses on the role of cone beam computerized tomography (CBCT), an imaging modality which offers many advantages by combining conventional x-rays with computerized volumetric reconstruction to reproduce a 3-dimensional image. A search of the peer-reviewed and indexed(More)
Cognitive Radio is an emerging wireless technology that has grabbed the attention of researchers, academicians, and telecommunication industries worldwide. Recent survey reports show that unlicensed frequency bands have become overcrowded from past few years with widespread acceptance of diverse wireless technology applications whereas, licensed frequency(More)
We present an analytical and continuous dc model for undoped cylindrical surrounding double-gate (CSDG) MOSFETs for which the drain current and subthreshold model is written as an explicit function of the applied voltages for the wireless telecommunication systems to operate at the microwave frequency regime of the spectrum. The model is based on a unified(More)
— In this paper, a frequency reconfigurable circular antenna design and development is proposed for wireless devices. In the proposed design, a circular patch antenna with circular slot using two PIN diodes at the centre frequency 10 GHz was designed and simulated frequency reconfiguration is achieved in the frequency range of 9.69-10.2 GHz and the measured(More)
—In this manuscript, a simple synthesis method of single square loop frequency selective surface (SSLFSS) is discussed, which may find the suitable application in the fast analysis and fabrication of the frequency-selective surface. The presented technique is used to design SSLFSS at 3 GHz, 15 GHz, 22 GHz and 26 GHz. At every frequency of interest, the(More)
—This article discusses the-state-of-the-art of the vane-loaded gyrotron traveling wave tube (gyro-TWT) amplifier, which is device of increasing importance for high resolution radar and high information density communication systems because of its high-power and broad bandwidth capabilities. Vane loading is identified as a means to achieve a low-beam(More)