Date of Award
Mohammed A. Matin, Ph.D.
Multi-carrier, Orthogonal frequency-division multiplexing, Pre-shared key, Quadrature amplitude modulation, Single-carrier, Wireless
The spectacular growth of wireless communication tools has escalated the number of mobile subscribers from almost 700 million in 2000 to more than 4 billion in 2009. The huge number of subscribers has led to several issues with how service is provided. The high user demand has forced developers to overcome the problems of the old analog systems and to introduce OFDM as a promising technique that can fulfill users' high demands. This technique matches well with high data rate connection and provides a higher capacity for the subscribers' usage.
The OFDM, as a multi-carrier, is more complex than the single-carrier transmission scheme. However, the OFDM technique maintains better performance for high data rate in terms of bit error rate (BER). In this thesis a comparison has been presented between the multi-carrier OFDM and the single-carrier to prove, in a simulation form, the theoretical point of view. Despite the advantages of using the OFDM scheme, there are several drawbacks. One of these negatives is the high peak to average power ratio (PAPR).
To overcome this problem, there are power reduction techniques that can be applied to the signal to reduce the high power. One of these techniques is the clipping and filtering technique. A maximum level is sited for the transmitted signal to reduce the power and afterward, the signal goes through a filter to remove the influence of the in-band distortion and out-of-band radiation.
Copyright is held by the author. User is responsible for all copyright compliance.
Albdran, Saleh M., "The Bit Error Rate (BER) Performance in Multi-Carrier (OFDM) and Single-Carrier" (2012). Electronic Theses and Dissertations. 744.
Received from ProQuest
SALEH M ALBDRAN