Error models for evaluating error control strategies in EGPRS systems

The aim of error models is to describe the statistical properties of bursty error sequences encountered in digital mobile fading channels. These models have wide applications to the design and performance evaluation of error control schemes. Target error sequences are generated by computer simulations of uncoded enhanced general packet radio service (EGPRS) systems with typical urban (TU) channels and rural area (RA) channels. A novel generative model is then proposed based on a properly parameterized and sampled deterministic process followed by a threshold detector and two parallel mappers. Simulation results indicate that the proposed deterministic process based generative model (DPBGM) enables us to approximate very closely the characteristics of the target error sequences with respect to the gap distribution (GD), error-free run distribution (EFRD), error cluster distribution (ECD), error burst distribution (EBD), error-free burst distribution (EFBD), block error probability distribution (BEPD), and bit error correlation function (BECF). The validity of the suggested DPBGM is further confirmed by the excellent match of the simulated frame error rates (FERs) and residual bit error rates (RBERs) of coded EGPRS systems obtained from the target and generated error sequences.