【摘要】 提出了一种可变误码率条件下MIMO-OFDM系统的资源分配算法。该算法基于注水原理,在平均功率受限条件下,根据信道情况计算出子信道上可能的最大误码率,利用误码率来分配功率和比特,在采用自适应调制技术,把连续的比特量化为实际需要的离散的数值并进一步优化分配。理论分析和仿真结果表明,MIMO-OFDM系统的功率和比特分配算法与固定误码率的算法相比,具有更高的频谱效率。更多还原

【Abstract】 A novel resource allocation algorithm for Multiple Input Multiple Output(MIMO)and Orthogonal Frequency Division Multiple Address(OFDM)system with variable BER is proposed.Using the Waterfilling algorithm,the BER’s upper bound in each subchannel is calculated,which is based on the channel state,the power and bit can be allocated according to it.Then,with the adaptive modulation technique,the consecutive bit is quantized into discrete value to optimize the power and bit allocation.Theoretic analysis and simulation results show that the spectral efficiency is greater than that of the algorithm with of fixed BER.更多还原