Modulation and Coding Scheme

The simulation results show that the proposed algorithm improved the throughput more obvious than any single modulation and coding scheme whether under high or low SNR conditions .

仿真结果表明：无论在高信噪比还是在低信噪比条件下，自适应算法均比单一的编码调制方案吞吐量有明显的提升。

It is presented an improved algorithm of adaptive power allocation and adaptive method of selecting constellation size M and rate R , i.e. , selecting an appropriate modulation and coding scheme according to the estimated channel condition .

介绍了改进的自适应功率分配的算法，并在此基础上给出了自适应确定调制级数M和码率R的界限，以用于3G系统的自适应调制和编码。

With the application of adaptive modulation and coding ( AMC ) technique , the modulation and coding scheme ( MCS ) of the users are determined by the serving base stations according to the channel qualities .

由于自适应调制与编码技术的应用，基站根据用户的信道条件指定用户的调制与编码方式（MCS）。

Simulation results show that in this single relay network , adaptive modulation and coding technology can make up the lack of a single modulation and coding scheme to enhance link throughput .

仿真结果表明，在单中继水声网络中，自适应调制编码技术能够克服固定调制编码方式的不足，提升链路的吞吐率性能。

Adaptive modulation and coding technology is one kind of link adaptation . It changes the modulation and coding scheme according to the channel state , optimizing the link performance .

自适应调制编码技术是链路自适应技术的一种，根据信道状态动态改变调制和编码方式，使得链路的误码和吞吐率性能达到最优。

Finally , the paper takes a systematic description to the adaptive modulation and coding system , and shows the important issues , which include the establishment of modulation and coding scheme , the threshold of the modulation and coding scheme .

文章最后，在系统级别上对自适应调制编码进行研究，指出了系统设计时所需要特别关注的问题，包括调制编码方案的制定及其切换门限的选择。