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中文摘要：
讨论了两种选择映射算法的改进算法.改进算法1通过降低计算复杂度来实现,将旋转相位序列的乘法放在快速傅里叶逆变换（IFFT）完成之后,而改进算法2以少量功率的增加为代价,省掉了边带信息的传送.对两种算法的实现方法进行了仿真比较.结果表明：需要在选择映射（SLM）算法的复杂度与峰均功率比性能之间做出平衡,以达到更好利用系统资源的目的.
英文摘要：
Two improved SLM schemes were discussed and their realization methods were compared. The first improved scheme was realized by lower the computational complexity, which puts phase rotation sequence multiply after IFFT. The second improved scheme designs a novel phase sequence which makes the side information not needed. It is also shown that comparable PAPR reduction performance with the original SLM algorithm can be achieved with a small increase in signal power. Simulation results show that there must be equilibriums between SLM computational complexity and PAPR performance, which can achieve better system resource utilization.
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