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Dynamic Differential Modulation of Sub-Carriers in OFDM

Ndujiuba, Charles Uzoanya and Ihhaze, Augustus (2016) Dynamic Differential Modulation of Sub-Carriers in OFDM. Journal of Wireless Networking and Communications, 06 (01). pp. 21-28. ISSN e-ISSN:2167-7336

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Orthogonal Frequency Division Multiplexing (OFDM) is a special case of FDM, which is implemented in digital communication systems. In this technology, multiplexing is applied to independent signals, which are sub-sets of one main signal, and applied to independent channels (sub-carriers) of a bandwidth. Here a user utilizes all sub- carriers to transmit its data. The questions here are: In OFDM can we modulate each sub-carrier differently from one another to enhance the overall integrity of the transmitted signal? If so, what determines the type of modulation technique that is suitable for the individual channels (sub-carriers)? These are the questions we seek to answer in this work, using simulation results to illustrate our theoretical analysis. We use bit error rate (BER) and data throughput as the metric for measuring the performance of the system.

Item Type: Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering, Science and Mathematics > School of Electronics and Computer Science
Depositing User: Dr. Charles U Ndujiuba
Date Deposited: 16 Mar 2016 11:58
Last Modified: 16 Mar 2016 11:58

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