| 基于短跨度交织的选择性映射 |
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| 引用本文： | 吴炳洋,程时昕.基于短跨度交织的选择性映射[J].东南大学学报,2005,21(4):385-388. |
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| 作者姓名： | 吴炳洋 程时昕 |
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| 作者单位： | 东南大学移动通信国家重点实验室,南京210096 |
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| 摘 要： | 为了抑制多载波通信中发送信号相对较高的峰值功率,提出了一种新的基于交织的选择性映射方案.在该方案中,采用一组交织跨度仅为几个比特的比特级交织器来产生多个表示相同信息的序列,从中选择对应信号峰均比最低的序列作为发送的序列.描述了该方案的实现方式以及这种短跨度交织器的结构.通过仿真考察了该映射方案在降低多载波信号峰均比方面的性能.结果表明该方案在抑制峰均比方面呈现出很好的性能,对于高阶调制信号,如16QAM和64QAM,它甚至达到选择性映射所能实现的最佳性能.与传统的基于交织的选择性映射方案相比较,这种基于短跨度交织的选择性映射方案产生非常短的时间延迟,只需要很少的缓冲寄存器,且易于用硬件实现.
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| 关 键 词： | 多载波通信 峰均比 选择性映射 交织 |
| 收稿时间： | 10 28 2004 12:00AM |
Short-span interleaving based selected mapping |
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| Wu Bingyang,Cheng Shixin.Short-span interleaving based selected mapping[J].Journal of Southeast University(English Edition),2005,21(4):385-388. |
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| Authors: | Wu Bingyang Cheng Shixin |
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| Institution: | National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China |
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| Abstract: | A novel interleaving based selected mapping (SLM) scheme to depress the relatively high peak power of transmit signals in multicarrier communications is proposed.In the scheme,a group of bit-level interleavers spanning only a few bits are used to produce multiple sequences representing the same information, and one of the sequences resulting in the lowest peak-to-average power ratio (PAPR) is selected for transmission.The implementation of the scheme including the structure of the short-span interleaver is illustrated.The performance of this PAPR reduction scheme is investigated by simulations.This scheme exhibits a good PAPR reduction performance,and for signals of high level modulation,such as 16QAM and 64QAM,it approaches the best performance of all SLM schemes.Compared to the conventional interleaving SLM,this short-span interleaving SLM results in a very short time delay,requires very few register units for buffering,and can be easily implemented by hardware. |
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| Keywords: | multicarrier communications peak-to-average power ratio selected mapping interleaving |
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