Mobility

Adaptive Optimization of an Iterative Multiuser Detector for Turbo-Coded CDMA

Free registration required

Executive Summary

EXtrinsic Information Transfer (EXIT) charts are utilized to optimize the iterative multiuser detector receiver in a multiuser turbo-coded CDMA system. The (receive) power levels are optimized for the system load using a constrained nonlinear optimization approach. The optimal decoding schedule is derived dynamically using the power optimized EXIT chart and a Viterbi search algorithm. Dynamic scheduling is shown to be a more flexible approach which results in a more stable QoS for a typical system configuration than one-shot scheduling, and large complexity savings over a receiver without scheduling.

  • Format: PDF
  • Size: 912.3 KB