Research on the construction of radio environment map based on revised spatial interpolation

• Main Authors: Zi Ran, Chang Jun, Zong Rong, Wang Ruonan, Liao Guiwen
• Format: Article
• Language: zho
• Published: National Computer System Engineering Research Institute of China 2018-03-01
• Series: Dianzi Jishu Yingyong
• Subjects: REM; cognitive radio; spatial interpolation
• Online Access: http://www.chinaaet.com/article/3000079468

Radio Environment Map(REM) provides accurate or comprehensive information support to dynamic spectrum access of cognitive radio networks. Practically, the sample size always fails to reach the application requirements due to the limitation of environments, devices or human factors in the measurement of field data. Hence, research on the technique of Spatial Interpolation, which can expand the discrete data into surface data, is great of application value. Comparing to the traditional MSM algorithm, this paper presents the RMSM algorithm, which is improved by modifying the weights, flexibly using the local data features, and efficiently neighbor searching. Experiments are conducted in a 15 m×20 m area，showing the obvious improvement of RMSM algorithm which reduces its error by 1.96 dB and enhances the robustness by 55.37%.