2020/10/08 by Prathapasinghe Dharmawansa, Dharmawansa, Prathapasinghe, Saman Atapattu +3
Engineering · #Advanced Wireless Communication Technologies #Antenna Design and Analysis #FOS: Computer and information sciences #FOS: Electrical engineering #Information Theory (cs.IT) #Satellite Communication Systems #Signal Processing (eess.SP) #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2010.04294
openalex publication_date 2020/10/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider a two--tile reconfigurable intelligent surface (RIS) assisted\nwireless network with a two-antenna transmitter and receiver over Rayleigh\nfading. We show that the average received signal-to-noise-ratio (SNR) optimal\ntransmission and combining vectors are given by the left and right singular\nspaces of the RIS-receiver and transmit-RIS channel matrices, respectively.\nMoreover, the optimal phases at the two tiles of the RIS are determined by the\nphases of the elements of the latter spaces. To further study the effect of\nphase compensation, we statistically characterize the average SNR of all\npossible combinations of transmission and combining directions pertaining to\nthe latter singular spaces by deriving novel expressions for the outage\nprobability and throughput of each of those modes. Furthermore, for comparison,\nwe derive the corresponding expressions in the absence of RIS. Our results show\nan approximate SNR improvement of 2 ,dB due to the phase compensation at the\nRIS.\n