期刊名称：International Journal of Computing and Business Research
电子版ISSN：2229-6166
出版年度：2012
出版社：International Journal of Computing and Business Research
摘要：This paper presents an alternate method to generate impulsive noise environment in the simulation of orthogonal-frequency-division-multiplexing (OFDM) wireless systems. The incorporation of discrete Fourier transform operator in the OFDM receiver/demodulator randomizes the impulsive noise components due to the spreading of energy at different sub-carriers, and therefore the characteristics of impulse noise transforms to approximately Gaussian distribution. In latest wireless mobile multimedia technology based on the space-time block-coded orthogonal-frequency-division-multiplexing (STBC-OFDM) or on the space-frequency blockcoded orthogonal-frequency-division-multiplexing (SFBC-OFDM) systems, the Alamouti’s STBC demodulation scheme further randomizes the impulsive noise components at the input of final decision device at the receiver end, which enhances its Gaussian character. Therefore, the presented work emphasis on the fact that while simulating the OFDM systems in impulsive noise environment, we may generate the impulsive noise components by merely incorporating equivalent Gaussian noise with zero-mean and corresponding variance. Hence, the overall effect of the impulsive noise on the performance of high data transmission rate STBC-OFDM or SFBC-OFDM wireless systems is approximately Gaussian in nature, which facilitates the simulation procedure.
