计算机工程与应用 ›› 2013, Vol. 49 ›› Issue (23): 10-13.

• 博士论坛 • 上一篇    下一篇

SCM-OFDM系统在高速信道下的干扰抑制算法

彭涛,肖  悦,李少谦   

  1. 电子科技大学 通信抗干扰国家级重点实验室,成都 611731
  • 出版日期:2013-12-01 发布日期:2016-06-12

Interference compensation algorithm for SCM-OFDM systems in high speed channels

PENG Tao, XIAO Yue, LI Shaoqian   

  1. National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China
  • Online:2013-12-01 Published:2016-06-12

摘要: 针对重叠码调制的正交频分复用(SCM-OFDM)系统在高速移动环境中,将产生复杂的载波间干扰和层间干扰问题,提出了一种用于SCM-OFDM系统在高速信道中的干扰估计和抵消算法。该算法利用译码器反馈的软信息,分别对载波间干扰和层间干扰进行估计和消除。仿真结果表明,提出的算法能够有效地改善SCM-OFDM系统在高速环境下的性能。

关键词: 正交频分复用, 重叠码调制, 高速信道

Abstract: Superposition Coded Modulation-Orthogonal Frequency Division Multiplexing(SCM-OFDM)systems are prone to the problem of serious interference from multiple-layers and inter-carriers when mobile terminals are in a high speed environment. To alleviate this problem, an interference estimation and cancellation algorithm is proposed for SCM-OFDM systems in high speed channels. In this algorithm, the Intercarrier Interference(ICI) and Multiple-Layer Interference(MLI) can be estimated and cancelled separately based on the soft information fed back from decoders. Simulation results show that the proposed algorithm can improve the performance of SCM-OFDM systems in the high speed movement.

Key words: Orthogonal Frequency Division Multiplex(OFDM), Superposition Coded Modulation(SCM), high speed channels