非对称前向译码协作的性能分析和参数优化方法研究

Performance analysis and parameter optimization of asymmetric decode-and-forward cooperation

研究了基于并行编码的非对称前向译码协作的中断概率性能以及节点相对位置、功率分配和时隙分配等参数的联合优化问题。结合理论分析和数值仿真,提出了一种简化参数优化方法。仿真表明,这种简化方法性能较好地逼近了联合优化方法的性能,相对于对称前向译码协作有明显的分集增益。

The outage probability of asymmetric decode-and-forward cooperation based on parallel coding is investigated, as well as the joint optimization of the parameters as relative position of nodes, power distribution and slot distrihution, etc. Combined with the theoretical analysis and numerical simulation, an optimization method of simplifying parameter is proposed. The simulation results reveal that the performance of the method well approaches that of the joint optimization. Further more, its diversity gain is apparently improved, compared with symmetric decode-and-forward cooperative diversity.