Symbol Error Probability of Linearly Modulated Signals affected by Gaussian Interference in Rayleigh Fading Channels

We present an analytical framework to evaluate the error probability, expressed in terms of symbol-error rate (SER) or bit-error rate (BER), of coherent detection schemes in the presence of additive interference and flat Rayleigh fading channels. This technical report assumes the useful signal and the interference impaired by the same fading channel, and the interference modelled as Gaussian at the decision variable. Applications of this analytical result include, but are not limited to, the performance evaluation of orthogonal frequency-division multiplexing (OFDM) systems subject to non-linear amplifier distortions in frequency-selective channels and the performance evaluation of direct-sequence code-division multiple-access (DS-CDMA) systems in frequency-flat downlink channels.