S. M. Shajedul Hasan

Learn More
This is an " accepted article " , which is a version which has been revised by the author to incorporate review suggestions, and which has been accepted by IEEE for publication. be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective(More)
—Telecommunication usage has skyrocketed in recent years and will continue to grow as developing world reaches to wireless as the communication medium of choice. The telecommunications world is only now addressing the significant environmental impact it is creating as well as the incredible cost on power usage. This realization has led to a push towards(More)
—This paper presents a new concept in RF multiplexer design to integrate a single monopole–type antenna to a receiver with large, multiband tuning ranges. Traditional techniques to integrate a single antenna with such receivers are limited in their ability to handle simultaneous channels distributed over very large tuning ranges, which is important for(More)
Various public safety personnel often cannot readily communicate with one another due to the lack of interoperability in their radios. One of the solutions to this problem is to provide user a multi-band multi-mode radio (MMR). In this paper we present the design of an experimental prototype multiband radio, which operates in public safety frequency bands(More)
— This paper introduces a flexible RF front end for whitespace communication. The designed front end can operate over any frequency from 100 MHz to 2.5 GHz and the channel bandwidth can be programmable from 4.5 kHz to 10 MHz. This large frequency range and wide bandwidth makes this hardware suitable for implementing most wireless standards. A direct(More)
This paper describes the implementation of a scanning signal detector and automatic modulation classification system. The classification technique is a completely blind method, with no prior knowledge of the signal's center frequency, bandwidth, or symbol rate. An energy detector forms the initial approximations of the signal parameters. The energy detector(More)
A novel and simple technique is presented to realize a five scroll chaos generator circuit using second generation current conveyors. A novel sinusoidal oscillator is first realized using second generation dual output current conveyors (DOCCIIs) and grounded passive components, which is then employed for the implementation of the five scroll chaos(More)