• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Arabian Journal for Science and Engineering >On the PAPR Reduction in LTE-Advanced: Precoding-Based SLM-LOFDMA Uplink Systems
【24h】

On the PAPR Reduction in LTE-Advanced: Precoding-Based SLM-LOFDMA Uplink Systems

机译：在LTE-Advanced中降低PAPR：基于预编码的SLM-LOFDMA上行链路系统

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Peak-to-average power ratio (PAPR) reduction is still a major challenge in the orthogonal frequency division multiple-access (OFDMA) uplink systems. The sub-carrier mapping in OFDMA can be done in two modes, clustered or localized mode and distributed mode. The localized mode is more appropriate for the practical implementations than the distributed mode due to its low sensitivity against the imperfect power control, phase noise and inter-carrier interference. In this paper, we present two precoding-based PAPR reduction techniques: Zadoff-chu and generalized chirp-like precoding-based techniques for localized OFDMA uplink systems, respectively, for the upcoming 3 GPP long-term evolution-advanced standard. In addition, the traditional selected mapping (SLM) PAPR reduction technique is implemented with the proposed systems to reduce more PAPR. At clip rate of 10~(-3), computer simulation results show that the precoding-based PAPR reduction techniques can reduce the PAPR up to 6.5 dB and precoding-based SLM techniques can further reduce the PAPR up to 4.4 dB, respectively, with user sub-carriers M = 16 and system sub-carriers N = 64, for the QPSK modulation. The symbol-error rate performance of the proposed systems is also better than the conventional OFDMA uplink systems and the WHT-based systems.
机译：降低峰均功率比（PAPR）仍然是正交频分多址（OFDMA）上行链路系统中的主要挑战。 OFDMA中的子载波映射可以以两种模式完成，即集群模式或局部模式以及分布式模式。局部模式比分布式模式更适合实际应用，因为它对不完善的功率控制，相位噪声和载波间干扰的敏感性低。在本文中，我们针对即将到来的3 GPP长期演进高级标准，分别提出了两种基于预编码的PAPR降低技术：Zadoff-chu和基于广义线性调频样预编码的本地化OFDMA上行链路系统技术。另外，传统的选择映射（SLM）PAPR减少技术与提出的系统一起实施，以减少更多的PAPR。在10％（-3）的削波率下，计算机仿真结果表明，基于预编码的PAPR降低技术可以将PAPR降低至6.5 dB，基于预编码的SLM技术可以进一步将PAPR降低至4.4 dB。对于QPSK调制，用户子载波M = 16，系统子载波N = 64。所提出的系统的符号错误率性能也优于常规的OFDMA上行链路系统和基于WHT的系统。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号