中国邮电高校学报(英文) ›› 2014, Vol. 21 ›› Issue (5): 43-46.doi: 10.1016/S1005-8885(14)60329-0

• Wireless • 上一篇    下一篇

Dynamic denoising studies in wideband radio channel measurement and modeling

COULIBALY Balla Moussa,赵雄文,梁晓林,李树,李艺伟   

  1. 华北电力大学
  • 收稿日期:2014-03-20 修回日期:2014-05-13 出版日期:2014-10-31 发布日期:2014-10-30
  • 通讯作者: 赵雄文 E-mail:zhaoxw@ncepu.edu.cn
  • 基金资助:

    M2M MIMO宽带无线信道模型及其传播特性和机理研究

Dynamic denoising studies in wideband radio channel measurement and modeling

  • Received:2014-03-20 Revised:2014-05-13 Online:2014-10-31 Published:2014-10-30
  • Contact: Xiongwen Zhao E-mail:zhaoxw@ncepu.edu.cn

摘要: The fixed level and dynamic denoising method was studied based on indoor-to-outdoor measured channel impulse responses (IRs) at 5.25 GHz with radio frequency (RF) 100 MHz bandwidth. It is found that the dynamic ranges, peak powers and noise floors of the IRs are with close correlations. The comparisons with different denoising methods are given by deriving the power delay profiles (PDPs), root mean square (RMS) delay spread (RMS DS), number of paths (NOPs) and Ricean K-factors. It is concluded that the traditional fixed level noise cut is under estimate of DS and NOPs. The Ricean K-factors are of little sensitive to noise cut irrespective of what kind of methods applied. The PDPs are not very sensitive to the fixed level noise cut, however, obvious changes can be found by dynamic noise cut. The dynamic noise cut is preferred when clear noise floors is observed and decided from the measured IRs, it’s of importance in data post processing for wideband radio channel measurements as well as the relevant modeling work.

关键词:

impulse response, wideband channel, denoising, channel parameter, channel measurement

Abstract: The fixed level and dynamic denoising method was studied based on indoor-to-outdoor measured channel impulse responses (IRs) at 5.25 GHz with radio frequency (RF) 100 MHz bandwidth. It is found that the dynamic ranges, peak powers and noise floors of the IRs are with close correlations. The comparisons with different denoising methods are given by deriving the power delay profiles (PDPs), root mean square (RMS) delay spread (RMS DS), number of paths (NOPs) and Ricean K-factors. It is concluded that the traditional fixed level noise cut is under estimate of DS and NOPs. The Ricean K-factors are of little sensitive to noise cut irrespective of what kind of methods applied. The PDPs are not very sensitive to the fixed level noise cut, however, obvious changes can be found by dynamic noise cut. The dynamic noise cut is preferred when clear noise floors is observed and decided from the measured IRs, it’s of importance in data post processing for wideband radio channel measurements as well as the relevant modeling work.

Key words: impulse response, wideband channel, denoising, channel parameter, channel measurement