[B-1A] Antennas and Propagation A (Electromagnetic Wave Propagation and Applications Except for Communications)

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)

[B-1A-10] Radio Map interpolation method using CSI latent space

〇Motoharu Sasaki¹, Genki Tajima¹, Keisuke Wakao¹, Mitsuki Nakamura¹, Kenichi Kawamura¹ (1. NTT, Inc.)

Keywords:

Radio Map,Interpolation,Channel Charting,Latent space

Generating radio maps—a critical task in wireless network design—involves interpolating received signal power at unmeasured locations based on measurements taken at specific points. However, conventional methods relying solely on spatial coordinates can lead to interpolation errors, as the influence of walls and obstacles causes a mismatch between physical distance and the similarity of radio environments. Recently, "Channel Charting"—a technique that derives a latent space reflecting the radio environment from Channel State Information (CSI)—has garnered significant attention. This paper proposes a method for applying this latent space to radio map interpolation and presents the results of its evaluation.