Abstract
The transmission through wireless channel suffers from many challenges due to the multipath effect that causes Inter Symbol Interference (ISI) problem. Multicarrier modulation (MCM) is proposed as solution to overcome the ISI. This paper presents the Discrete Wavelet Transform (DWT) based multicarrier modulation as alternative platform of conventional OFDM in which there is no need for cyclic prefix overhead due to the overlapping nature of DWT. Simulation based analysis will be used to simulate the two multicarrier systems, DWT with 'haar' mother based multicarrier STBC-MIMO system (The term multicarrier refers OFDM), in which information is conveyed with an STBC matrix that is transmitted from combinations of the transmit antennas of the corresponding MIMO system, and the conventional STBC-MIMO under the scenario of having multiple antennas system, with MQAM and MPSK as two modulation schemes in Rayleigh fading channel. Based on the bit error rate performance and the transmission capacity, the DWT based multicarrier system was found to be superior compared with the conventional OFDM system. Index Terms: OFDM (Orthogonal Frequency Division Multiplexing), STBC (Space Time Block Code), MIMO (Multi Input Multi Output), M-QAM (��-ary quadrature amplitude modulation), M-PSK (��-ary phase shift keying)
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