Monday 19th of February 2018

Improved Interference Cancellation for Downlink Wavelet Based Multi-Carrier CDMA System

Ahmad Saad El-Deen, Hossam El-Deen Aboubakr Hassan and Atef Mohammed Hassan Ghonem

The current wireless mobile communication systems are occupying higher transmission bandwidths to support multimedia applications with high data rates. The multi-carrier code division multiple access (MC-CDMA) is one of the most promising candidates for the future generations of wireless mobile communications. Inter-symbol interference (ISI) and multiple access interferences (MAI), are the major challenges in the mobile communication systems due to transmission over multipath fading channels. In this paper, a proposed receiver structure based on discrete wavelet transforms for the downlink multicarrier code division multiple access (DWT-MC-CDMA) is presented to mitigate these interferences. Based on simulation results, the DWT-MC-CDMA receiver provides a better bit error rate (BER) performance than the conventional downlink discrete fourier transform multi-carrier code division multiple access (DFT-MC-CDMA) receiver.

Keywords: Multi-Carrier Code Division Multiple Access (MC-CDMA), Discrete Wavelet Transform (DWT), Inter Symbol Interference (ISI), Multiple Access Interference (MAI).

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Ahmad Saad El-Deen
Electrical communication engineer a master science student at Suez Canal University

Hossam El-Deen Aboubakr Hassan
Associate professsor Military Technical colleg Cairo, Egypt

Atef Mohammed Hassan Ghonem
Head of electrical engineering department Suez Canal University

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