CAJ | 학술논문

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.
위료억제다재파통신중발송신호상대교고적봉치공솔,제출료일충신적기우교직적선택성영사방안.재해방안중,채용일조교직과도부위궤개비특적비특급교직기래산생다개표시상동신식적서렬,종중선택대응신호봉균비최저적서렬작위발송적서렬.묘술료해방안적실현방식이급저충단과도교직기적결구.통과방진고찰료해영사방안재강저다재파신호봉균비방면적성능.결과표명해방안재억제봉균비방면정현출흔호적성능,대우고계조제신호,여16QAM화64QAM,타심지체도선택성영사소능실현적최가성능.여전통적기우교직적선택성영사방안상비교,저충기우단과도교직적선택성영사방안산생비상단적시간연지,지수요흔소적완충기존기,차역우용경건실현.
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.