A Time-Hopping Sequence Design for Narrowband Interference Suppression in Impulse Radio UWB Systems

Impulse radio ultra-wide bandwidth wireless is a fast emerging technology where its applications underlay coexisting narrowband services over a huge bandwidth. Therefore, the coexistence problem between ultra-wide bandwidth and narrowband systems warrants investigation. A time-hopping sequence design is proposed for impulse radio ultra-wide bandwidth systems to suppress the mutual interference between ultra-wide bandwidth wireless and coexisting narrowband service. This sequence design has low computation complexities and can be easily implemented in practical systems. Numerical results are provided to show that the time-hopping sequence design can significantly suppress the mutual interference between ultra-wide bandwidth and narrowband services, hence, the integrity of both ultra-wide bandwidth and narrowband systems can be greatly enhanced.