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.