Reconfigurable intelligent surface (RIS): Eigenvalue Decomposition-Based Separate Channel Estimation
32nd IEEE Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2021, Virtual, Helsinki, Finlandiya, 13 - 16 Eylül 2021, cilt.2021-September, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Cilt numarası: 2021-September
- Doi Numarası: 10.1109/pimrc50174.2021.9569501
- Basıldığı Şehir: Virtual, Helsinki
- Basıldığı Ülke: Finlandiya
- Anahtar Kelimeler: Keyhole channel, reconfigurable intelligent surface, multiple-input multiple-output, eigenvalue decomposition
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- İstanbul Medipol Üniversitesi Adresli: Evet
Özet
Reconfigurable intelligent surface (RIS) has recently drawn significant attention in wireless communication technologies. However, identifying, modeling, and estimating the RIS channel in multiple-input multiple-output (MIMO) systems are considered challenging in recent studies. In this paper, a disassembled channel estimation framework for the RIS-MIMO system is proposed based on the eigenvalue decomposition (EVD) concept to separate the cascaded channel links and estimate each link separately. This estimation is based on modeling the RIS-MIMO channel as a keyhole MIMO system model. Numerical results show that the proposed estimation method has a low estimation time overhead while providing less estimation error.