基于TCM-OFDM自适应调制技术的宽带数据链系统  

Wideband Data Link System Based on TCM-OFDM Adaptive Modulation Technology

作　　者：宋孝先[1] 

机构地区：[1]国防信息学院2系,武汉430010

出　　处：《指挥信息系统与技术》2017年第6期71-75,共5页Command Information System and Technology

摘　　要：基于最小误比特率准则,提出了一种适用于正交频分复用(OFDM)系统的自适应子载波数据加载算法。该算法简单,运算量小。仿真结果表明,应用该算法可在系统总功率有限时进行自适应网格编码调制(TCM),在数据吞吐量一定时可获得较好通信质量,在通信质量一定时可自适应调整数据吞吐量。该算法在宽带数据链系统中应用前景良好。Based on the principle of minimum bit error rate （BER ） , an adaptive subcarrier data load algorithm for the orthogonal frequency division multiplexing （OFDM ） system is presented. The algorithm is simple and has small calculated amount. Simulation results show that the adap-tive trellis-coded-modulation （TCM ） can be carried out with the limited total power of the system by the algorithm, the better communication quality can be obtained with the fixed data through-put ,and the data throughput can be adaptively adjusted with a certain communication quality. The algorithm has a wide application prospect in the wideband data link system.

关 键 词：正交频分复用 自适应调制 自适应加载算法 网格编码调制 

分 类 号：TP991.3[自动化与计算机技术]