改进的自适应Fischer算法及在MIMO-OFDM系统调制性能  

The improved adaptive Fischer algorithm and its modulation performance in MIMO-OFDM Systems

作　　者：王玉洁[1] 宁宁[2] 

机构地区：[1]辽宁经济职业技术学院教务处,辽宁沈阳110122 [2]洛阳师范学院物理与电子信息学院,河南洛阳471022

出　　处：《辽宁工程技术大学学报（自然科学版）》2012年第6期889-892,共4页Journal of Liaoning Technical University (Natural Science)

摘　　要：针对在信道中实时分配比特和功率的问题.采用了一种由Fischer算法改进的自适应算法.经在MATLAB仿真平台下模拟验算比较.结果表明:改进的Fischer算法运算复杂度低,能够根据子载波信道增益大小分配比特.与8PSK固定调制方式MIMO-OFDM系统相比,更能够在保证系统信道质量所需误码率和总发射功率前提下,根据信道状态信息,动态分配比特和功率,显著增加信道比特传输速率,改善系统整体性能.In order to improve the channel capacity and realize real-time allocation of bits and power,an improved adaptive algorithm has been developed in this study based on the Fischer algorithm.The simulation using MATLAB shows that the algorithm achieves a lower computational complexity,and could allocate bits according to the channel gain size of sub-carriers.In comparison with the 8PSK fixed modulation and MIMO-OFDM system,the new algorithm not only warrants the required bit error rate and total emission power,but at the same time also allocates bits and power according to the channel information.Thus it significantly improves the bit rate transmitted in the channel and the overall system performance.

关 键 词：自适应调制技术 Fischer算法 分布式MIMO-OFDM系统 比特律 误码率 总发射功率 信道状态 固定调制方式 

分 类 号：C931.6[经济管理—管理学]