%0 Journal Article
%T A superposition based optimization scheme for downlink cellular system<br>一种基于叠加编码的下行链路功率优化方案
%A 杨郑玉
%A 张祖凡
%A 吴爱爱
%A 杨静
%J 重庆邮电大学学报(自然科学版)
%D 2011
%I 
%X Although the traditional network coding scheme can improve the transmission performance of wireless communication system by reducing the transmission packets in the system, it still has problems in conserving resources and enhancing capacity. Based on the theory of traditional network coding, this paper investigates a superposition coding scheme for downlink transmission which can optimize the transmit power of base station. In the approach, the base station can transmit messages in a superposition way by use of the channel states division through collaborating with users. Thereby it is possible to reduce the average transmit power of the base station and improve the capacity of the system. The comparison between the performances of the superposition scheme and traditional network coding in a power constraint condition and the simulation results show that the superposition scheme can achieve much better system capacity.
%K wireless communications
%K network coding
%K superposition coding
%K power optimization<br>移动通信
%K 网络编码
%K 叠加编码
%K 功率优化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=5C2694A2E5629ECD6B59D7B28C6937AD&aid=C3C889FD0D3CC16F6E978E93A46C4275&yid=9377ED8094509821&vid=EA389574707BDED3&iid=B31275AF3241DB2D&sid=D559883475316B44&eid=B10D796AE1B3FEBD&journal_id=1673-825X&journal_name=重庆邮电大学学报(自然科学版)&referenced_num=0&reference_num=0