A multicarrier chip-interleaved multiuser UWB system

We propose a multicarrier interleave-division multiple-access scheme for ultra-wideband wireless communications. A chip-level interleaving method at the transmitter with a simple turbo receiver is proposed to effectively suppress the frequency-selective fading and multiple-access interference. A soft frequency notching method is suggested to suppress the narrowband interference. The performance of the proposed system is evaluated by both theoretic analysis and simulations. It is seen the proposed system exhibits single-user performance even under over-loaded conditions.