1. ABHIJIT-KIRAN VALLURI
Information acquired: 2025
ABHIJIT-KIRAN VALLURI is an academic who published a paper in 2016 entitled Precoder Detection for Cooperative Decode-and-Forward Relaying in OFDMA Systems. ABHIJIT-KIRAN VALLURI published this work as part of a team: Valluri, Abhijit Kiran. Here is a description of this work: We consider an LTE network where a secondary user acts as a relay, transmitting data to the primary user using a decode-and-forward mechanism, transparent to the base-station (eNodeB). Clearly, the relay can decode symbols more reliably if the employed precoder matrix indicators (PMIs) are known. However, for closed loop spatial multiplexing (CLSM) transmit mode, this information is not always embedded in the downlink signal, leading to a need for effective methods to determine the PMI. In this thesis, we consider 2x2 MIMO and 4x4 MIMO downlink channels corresponding to CLSM and formulate two techniques to estimate the PMI at the relay using a hypothesis testing framework. We evaluate their performance via simulations for various ITU channel models over a range of SNR and for different channel quality indicators (CQIs). We.
