1. Introduction
Multimedia communications demanding for a higher bit rate and bandwidth require a more robust and flexible transmission technology than the one offered by the current third generation (3G) system. Although the roll out of 3G system is staggered in many countries to really see the effectiveness of the one carrier system, a multicarrier technology, namely, Orthogonal Frequency Division Multiplexing (OFDM) has been explored and introduced in satellite broadcasting system such as European Digital Audio Broadcasting (DAB) and Digital Video Broadcasting (DVB) [1]. This technology has also been explored in WLAN environment such as IEEE 802.11 Wireless LAN, High-performance LAN (HIPER-LAN) type2, and Multimedia Mobile Access Communication (MMAC) [1].