A. K. M. Arifuzzman

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The main objective of this paper is to design a novel threshold voltage detector circuit using carbon nanotube field effect transistor (CNTFET). This circuit is simulated in HSPICE by using HSPICE model of CNTFET. The uniqueness of this proposed circuit is that the threshold voltage of each CNTFET decides each voltage detection level where as in CMOS(More)
In this paper, the diversity gain of a Maximal Ratio Combiner (MRC) has been investigated for Orthogonal Frequency Division Multiplexing (OFDM) by varying the number of receiving antennas. Different modulation schemes namely 64-PSK, 64-QAM, 16-PSK, 16-QAM and QPSK have been used in OFDM technique. The simulation results show that the performance (SNR) of an(More)
Mobile Ad hoc Networks (MANETs) have drawn considerable attentions of the researchers for the last few years. MANETs, consisting of mobile nodes, are self-organizing and self-configuring and hence can be deployed without any infrastructure support. MANETs also have some limitations including short-life, unreliability, scalability, latency, high(More)
This paper deals with the performance analysis (i.e., Symbol Error Rate) of M-ary Phase-shift-keying (M-PSK) and M-ary Quadrature Amplitude Modulation (M-QAM) to transmit information using Selection Combining (SC) diversity technique over flat Rayleigh communication channel with Orthogonal Frequency Division Multiplexing (OFDM). It is well known that the(More)
Wireless communications are subject to three major constraints: (i) a complex and unpredictable fading channel, (ii) a scarce radio spectrum, and (iii) limitations on the power and the size of handheld terminals. New technologies have been introduced and evolved based on these constraints. Among all of these technologies Worldwide Interoperability for(More)
Being able to rapidly detect a low air flow rate with high accuracy is essential for various applications in the automotive and biomedical industries. We have developed a thermal-based low air flow sensor with a low-power sensor readout for biomedical applications. The thermal-based air flow sensor comprises a heater and three pairs of temperature sensors(More)
In this paper, through the basic components of fiber optic communication a novel transmission system called OCDMA (Optical Code Division Multiple Access) based PON with centralized light wave is demonstrated. Here we experimentally investigated the transmission performance of a modulation based on a recently proposed technique, OCDMA for next-generation(More)
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