基于误码率的DF协作通信系统功率分配方法

摘要

Since the cooperative communication system′s energy is limited and its bit error rate is high,a probability alloca-tion algorithm based on bit error rate is researched for the DF cooperative communication system. Under the condition that total transmission power is definite,an optimization approach is set up to minimize the bit error rate. The closed-form solution for the optimization approach is solved by means of Lagrange multiplier to achieve the optimal power allocation scheme. The simulation results show that,in the case of the definite total power,the bit error rate of the power allocation algorithm is lower than that of other power allocation schemes.%针对协作通信系统能量有限和误码率高等问题，在DF协作通信系统中，研究一种基于误码率的概率分配算法。在总发射功率一定的条件下，建立以满足最小误码率为目标的优化问题。利用Lagrange乘子，求解该优化问题的闭式解，得出最佳功率分配方案。仿真结果表明，在总功率一定的情况下，该功率分配算法较其他功率分配方案具有较低的误码率。