• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Engineering MIS >Compromise between spectral efficiency and interference cancellation in OFDM system
【24h】

Compromise between spectral efficiency and interference cancellation in OFDM system

机译：OFDM系统中频谱效率与干扰消除之间的折衷

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

OFDM (Orthogonal Frequency Division Multiplexing) has attracted significant attention, and become very promising technique to ensure high data rate wireless communication systems, thanks to its resistance to the frequency selectivity of the channel. However, this technique has major drawbacks such as the Adjacent Channel Interference (ACI), due to the out of band radiation, which can be generated because of the limited-time of each sub-carrier signal for each symbol. Others multipath problems faced by the OFDM are the inter symbol Interference (ISI) and Inter channel interference (ICI) due to the spectral overlap of channels. To overcome these problems a guard interval and a guard band should be inserted cyclically to extend the OFDM symbol. Even so, this insertion can lead to a reduction of the spectral efficiency by the redundancy in the guard interval and with the virtual carrier that does not convey any information. To compensate for this loss, minimizing the guard interval and guard band while maintaining orthogonality and eliminating interferences is studied. In this paper, the insertion of the GB and GI and its effect on the BER and the OOB radiation are shown with simulations to find a compromise between this insertion and the spectral efficiency and BER performance.
机译：OFDM（正交频分复用）受到了广泛的关注，并且由于其对信道的频率选择性的抵制而成为确保高数据速率无线通信系统的非常有前途的技术。然而，由于带外辐射，该技术具有诸如邻近信道干扰（ACI）之类的主要缺点，由于每个符号的每个子载波信号的时间有限，可以产生带外辐射。 OFDM面临的其他多径问题是由于信道的频谱重叠而引起的符号间干扰（ISI）和信道间干扰（ICI）。为了克服这些问题，应当周期性地插入保护间隔和保护频带以扩展OFDM符号。即使这样，由于保护间隔中的冗余以及不传送任何信息的虚拟载波，这种插入仍可能导致频谱效率降低。为了补偿这种损耗，研究了在保持正交性和消除干扰的同时最小化保护间隔和保护带。在本文中，通过模拟显示了GB和GI的插入及其对BER和OOB辐射的影响，以发现这种插入与频谱效率和BER性能之间的折衷。

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