NEW BER ANALYSIS OF OFDM SYSTEM OVER NAKAGAMI-n (RICE) FADING CHANNEL

Modern wireless communication systems support high speed multimedia services. These services require high data rates with acceptable error rates. Orthogonal Frequency Division Multiplexing (OFDM) is a capable candidate to solve this problem. In this paper, a new expression for the BER of OFDM system has been derived over Nakagami–n (Rice) fading channels using characteristics function (CHF) approach. The exact probability density function of first order of Nakagami-n (Rice) random vector is used to derive the expression for the error rates of OFDM system. The BER derivation of Rician fading channel is slightly more complex compared to the Nakagami–m distribution because the PDF of the Rician RV contains an explicit term of a modified Bessel function of first kind. Earlier, this problem was solved by replacing the Bessel function with its infinite series and exponential integral representation. Here we propose an integral expression to remove the complexity of the expression.