An adaptive UWB pulse shaping algorithm for narrowband interference suppression

Adaptive pulses in ultra wideband (UWB) wireless communication system are characterized by forming notches at some frequencies as a way to suppress its interference to licensed narrowband users. This paper proposes a novel method in designing adaptive pulses by using the Cognitive Radio technology and Parks-McClellan algorithm. One case of arbitrary narrowband interference is studied. The simulation results show that the power spectrum density of the proposed pulses meets the constraints of the FCC indoor mask. The comparison of bit error rate performance is presented by using the adaptive pulses and the fifth-order derivative Gaussian pulse to the time hopping UWB system in the additive white Gaussian noise channel. With the low computational complexity, the proposed pulses have lower bit error rate than the fifth-order derivative Gaussian pulse and hence make the whole UWB system reduce narrowband interference.