CTH06-3: Collision Model for Bit Error Rate analysis of Time Hopping Impulse Radio in Multipath Nakagami-m Channels

In presence of multiple access interference, the performance of impulse radio system is affected by collisions with other users. In this paper we evaluate the bit error probability by employing a collision model for describing the non-stationary interference caused by simultaneous transmissions in time hopping systems. The collision model provides a simple approximation for the error probability even in multipath channels since the decision variable can be conditioned to the collision events. Numerical validations of the error probability for several propagation settings (e.g., over Nakagami-m fading channels or realistic scenarios) employing the collision model show that the proposed method is simple and accurate for most practical applications.