Samiul Hayder Choudhury

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In this paper, the effect of atmospheric turbulence on bit error probability in free-space optical CDMA scheme with Sequence Inverse Keyed (SIK) optical correlator receiver is analyzed. Here Intensity Modulation scheme is considered for transmission. The turbulence induced fading is described by the newly introduced gamma-gamma pdf[1] as a tractable(More)
In this paper, the analytical treatment of a half wave J-pole antenna has been carried out assuming a sinusoidal current distribution. The important properties of this type antenna have been compared with that of a half-wave dipole. It is observed that a J-pole antenna has better performance in terms of directivity. The directivity of this antenna has been(More)
Channel characterization is the primary phase of wireless radio frequency identification (RFID) system based tracking processes. Traditional approaches of path-loss modeling of indoor RFID channel lack of the ability to assess the consistency and reliability of the fit. In this paper, we propose two approaches to ensure the reliability of the(More)
In this paper, the effect of atmospheric turbulence on bit error probability in free-space multi-carrier optical CDMA (MC-OCDMA) scheme with Sequence Inverse Keyed(SIK) optical correlator receiver is analyzed. Here Intensity Modulation scheme is considered for transmission. The turbulence induced fading is described by the newly introduced gamma-gamma(More)
Semiconductor lasers are the integral parts of optical communication systems. The temperature dependence of the lasing wavelength of a laser is an important issue because it is used in different environment with varying thermal conditions. In this paper, a comparative study of the temperature dependence of lasing wavelength of two types of laser diode has(More)
In this paper a new model of Multi-Carrier Code Division Multiple Access (MC-CDMA) RAKE receiver has been proposed for multipath fading mitigation based on maximum ratio combining diversity. The analytical model has been verified considering Rayleigh multipath fading channel. The simulation results substantiate that the proposed MC-CDMA RAKE receiver(More)
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