Coding and equalization for PPM on wireless infrared channels

We analyze the performance of trellis-coded pulse-position modulation with block decision-feedback equalization (BDFE) and parallel decision-feedback decoding (PDFD) on indoor, wireless infrared channels, We show that the red uced complexities of BDFE and PDFD as compared to maximum-likelihood sequen ce detection allow for better codes whose increased coding gain more than c ompensates for the penalty due to suboptimal detection. We quantify these n et gains in performance over a range of dispersive channels, indicating whe re BDFE and PDFD provide the best performance, Finally, we present Monte Ca rlo simulation results to verify our analysis.