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Local Subdivisional Channel Estimation in RIS-Assisted THz MIMO-OFDM Systems | IEEE Conference Publication | IEEE Xplore

Local Subdivisional Channel Estimation in RIS-Assisted THz MIMO-OFDM Systems


Abstract:

Reconfigurable intelligent surfaces (RIS) offer significant performance gains for terahertz (THz) multiple-input and multiple-output (MIMO)-orthogonal frequency division ...Show More

Abstract:

Reconfigurable intelligent surfaces (RIS) offer significant performance gains for terahertz (THz) multiple-input and multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) systems. However, channel estimation (CE) in high-dimensional RIS channels remains challenging. This paper proposes a compressed sensing (CS)-based CE method that separates angle and gain estimation, reducing pilot overhead and computational complexity. We leverage spatial path selection enabled by designed beam and reflection patterns to reduce dimensionality. Our method achieves over 35 \% pilot overhead reduction and significantly improves computational efficiency, while maintaining accuracy comparable to existing methods.
Date of Conference: 10-12 May 2024
Date Added to IEEE Xplore: 24 July 2024
ISBN Information:
Conference Location: Nanjing, China

Funding Agency:


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