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| MIMO系统功率比特自适应算法研究 | |
| 作者姓名： | 李钊 韩维佳 陈婷 |
| 作者单位： | 西安电子科技大学综合业务网国家重点实验室 |
| 摘 要： | 发射功率受限的自适应调制系统,由于调制方式有限,实际使用的发射功率通常小于受限的发射功率,对这一部分剩余功率进行再分配和利用,能够提高频谱效率。文章对M IMO系统中功率和比特自适应算法进行了研究,提出对剩余功率在空域进行再分配的自适应算法。仿真结果表明,在空域采用等功率分配,再进行空域剩余功率再分配,能够提高频谱效率,并且复杂度低,易于实现。 |
| 关 键 词： | MIMO系统 自适应调制 注水 功率分配 频谱效率 |
Research on Power and Bit Adaptation Algorithm for MIMO Systems |
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| Authors: | Li Zhao Han Weijia Chen Ting |
| Abstract: | In adaptive modulation system with transmit power constraint due to limited constellation the actual transmit power is always less than the given power.Spectral efficiency can be improved by utilizing this residual power.This paper investigated power and bit adaptation in MIMO systems and proposed an adaptation algorithm with spatial-domain residual power reallocation.Simulation results show that applying equal power allocation and then reallocation residual power in spatial domain can improve spectral efficiency.This is of low complexity and easy to implement. |
| Keywords: | MIMO Systems Adaptive modulation Waterfilling Power allocation Spectral efficiency |
| 本文献已被 CNKI 维普 等数据库收录！ | |