Performance of a BPSK NB Receiver in MB-OFDM UWB Interference

In this paper, we evaluate the effect of multi-band orthogonal frequency division multiplexing (MB-OFDM) ultra-wide-band (UWB) interference on a narrowband (NB) receiver. For this purpose, we first derive an analytical expression for the exact moment generating function (MGF) of MB-OFDM UWB interference. Subsequently the bit error rate (BER) of a binary phase-shift keying (BPSK) NB receiver impaired by MB-OFDM UWB interference and additive white Gaussian noise is analyzed. We show that for NB signal bandwidths much smaller and much larger than the OFDM sub-carrier spacing a Gaussian approximation (GA ) and an impulsive GA of the MB-OFDM UWB interference leads to accurate performance predictions, respectively. However, for most NB signal bandwidths of practical interest the exact BER analysis has to be used to obtain meaningful results.