Simulated Performance of an OFDM Communication System: Noise Density Function for Quasianalytical Bit Error Rate Estimation

Channel correction in an OFDM (Orthogonal Frequency Division Multiplex) system affects channel noise, in such a way, that the usual assumption of gaussian white noise is no longer valid. The gaussian white noise that goes into the receptor is filtered together with the signal and the noise becomes coloured. This paper shows the new noise probability density function and the related parameters that would allow the use of quasianalytical bit error rate estimation technique. Two equivalent probability density functions valid under different channel conditions are shown.