Browsing by Subject "Wireless communication systems-OFDM"

Now showing items 1-16 of 16

Adaptive resource allocation for multiuser OFDM system based on modified genetic algorithm and particle swarm optimization

Imtiaz Ahmed (Department of Electrical and Electronic Engineering, 2008-09)

Like other wireless systems, Orthogonal Frequency Division Multiplexing (OFDM) requires the proper allocation of the limited resources, like total transmit power and available frequency bandwidth, among the users to meet ...
Analysis and reduction of PAPR effect using linear coding in OFDM system

Dey, Mukta Rani (Institute of Information and Communication Technology (IICT), 2014-01)

A high peak-to-average power ratio (PAPR) is one of the major shortcomings in Orthogonal Frequency Division Multiplexing (OFDM) systems, as it causes nonlinearity distortion in the transmitter, degrading the performance ...
Design of a high speed OFDM transmitter and receiver

Foisal Ahmed (Institute of Information and Communication Technology (IICT), 2014-02)

System–on-a-chip (SoC) is now a trend in digital design because it gives a lot of advantages over discrete electronic based product such as higher speed, lower power consumption, smaller size, lower cost etc. Reconfigurable ...
Hybrid diversity combined OFDM for optical wireless communication

Faruque, Rumana Binte (Institute of Information and Communication Technology, BUET, 2017-08-12)

Optical Wireless Communication (OWC) in the visible spectrum provides the opportunity of high speed data transmission along with room illumination. In order to encode data for OWC, different variants of Orthogonal Frequency ...
Machine learning based dimming control of orthogonal frequency division multiplexing based light fidelity

Nowrin, Itisha (Institute of Information and Commutation Technology, 2021-03-13)

This thesis proposes a new hybrid orthogonal frequency division multiplexing (OFDM) modulation technique termed as DC-biased Pulse amplitude modulated Optical OFDM (DPO-OFDM) for light fidelity (LiFi) systems. The proposed ...
Optimum DC bias for DC biased optical OFDM based optical wireless communication using machine learning

Purnita, Krishna Saha (Institute of Information and Commutation Technology, 2021-11-20)

Light fidelity (LiFi) is a form of optical wireless communication considered supplementary to conventional radio frequency communication. LiFi uses differ- ent orthogonal frequency division multiplexing (OFDM) to encode ...
Peak-to- average power ratio reduction method for orthogonal frequency division multiplexing signals in wireless communication systems

Tangina Sultana (Institute of Information and Communication Technology (IICT), 2015-07)

The demand for high speed mobile wireless communication is rapidly growing. Orthogonal Frequency Division Multiplexing (OFDM) technology promises to be a key technique for achieving the high data capacity and better spectral ...
Performance analysis of a MIMO-OFDM communication system with SFBC using MSK and GMSK modulation

Marzuka Ahmed Jumana (Department of Electrical and Electronic Engineering (EEE), BUET, 2019-01-01)

The use of multiple antennas at both the transmitting and receiving end of communication channel initiates the multiple input multiple output technology (MIMO). Orthogonal Frequency Division Multiplexing, OFDM with MIMO ...
Performance analysis of an OFDM broadband power line communication (BPLC)system with multiple receiving antennas

Muhaimin, Md. (Department of Electrical and Electronic Engineering (EEE), 2014-02)

Power line networks are an excellent infrastructure for broadband communication, though there exists some technical difficulties as noise, attenuation, multipath scenario etc. are presented in power line system as power ...
Performance analysis of light fidelity systems considering reliable communication and room illumination

Munni, Shahfida Amjad (Institute of Information and Communication Technology, 2018-03-31)

Light fidelity (LiFi) is a means of high speed wireless data transmission along with room illumination using the existing light emitting diode (LED) infrastructure. As a data encoder for LiFi, different variants of orthogonal ...
Performance analysis of space frequency block coded OFDM free-space optical communication systems with polarization diversity over atmospheric turbulent channel

Shariful islam, Md. (Department of Electrical and Electronic Engineering (EEE), BUET, 2022-11-26)

Free-space optical (FSO) communication system is an emerging technology for future broadband optical data communication network due to its lucrative properties like required no license, cost effective, simple hardware ...
Performance analysis of STBC-OFDM wireless communication system with carrier frequency offset

Afsana Khatoon (Department of Electrical and Electronic Engineering, 2009-01)

The demand for high-speed mobile wireless communications is rapidly growing. OFDM technology promises to be a key technique for achieving the high data capacity and spectral efficiency requirements for wireless communication ...
Performance evaluation of spatial OFDM for peak power limited optical wireless channels

Nusrat Tazin (Institute of Information and Communication Technology, BUET, 2017-06-10)

In fulfilling the current demand for high bandwidth-intensive applications, optical wireless communication (OWC) is considered as a supplementary solution to radio frequency (RF) based systems. One type of OWC is a pixelated ...
Reduction of ICI effect in MIMO - OFDM system using self -cancellation with convolution coding and space frequency block code

Saifur Rahman Sabuj (Institute of Information and Communication Technology (IICT), 2011-01)

New generation wireless communication systems require high data rate transmission in order to fulfill the requirements for on demand multimedia communication such as- audio, video, image and data. Orthogonal frequency ...
Specific quality of service constrained optimal allocation of transmit power in cognitive OFDMA systems

Normin Nahar (Department of Electrical and Electronic Engineering (EEE), BUET, 2019-01-16)

Cognitive radio (CR) is considered to enhance spectrum utilization efficiency by dy- namically sharing the spectrum between licensed/ primary users (PUs) and unli- censed/secondary users (SUs). This is ...
Suitability of filtering based OFDM for the next generation wireless communications

Mishu, Md. Motahar Hossain (Institute of Information and Communication Technology, 2019-01-09)

The 4G Long Term Evolution (LTE) cellular communication systems use the popular multicarrier waveformnamed orthogonal frequency division multiplexing (OFDM). Inthe case of huge number of users in 5G scenarios, OFDM maynot ...

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