Matches in SemOpenAlex for { <https://semopenalex.org/work/W4200260043> ?p ?o ?g. }
Showing items 1 to 69 of
69
with 100 items per page.
- W4200260043 abstract "Abstract In a cell-free massive MIMO system, multiple users arrive at multiple access points at separate times, while in an OFDM system, different delays can be equivalent to symbol timing offsets (STOs). Since symbol timing offsets are not all the same, in the downlink transmission process, it is necessary to consider its impact on transmission techniques, such as channel estimation and downlink precoding. In this paper, aiming at the performance loss caused by STO in cell-free massive MIMO-OFDM system, we propose a multi-RB precoding optimization algorithm that maximizes the downlink sum rate. We derive the sum rate maximization problem into an iterative second-order cone programming (SOCP) form to achieve convex approximation. Then, considering the impact of STO on the accuracy of cell-free massive MIMO-OFDM channel estimation, we propose a downlink channel estimation method, which jointly uses channel state information reference signal (CSI-RS) and demodulation reference signal (DMRS). Simulation results show that the proposed multi-RB optimal precoding can effectively improve the downlink sum rate, and the proposed downlink channel estimation can obtain accurate multi-RB frequency domain channel parameters." @default.
- W4200260043 created "2021-12-31" @default.
- W4200260043 creator A5016198367 @default.
- W4200260043 creator A5022015602 @default.
- W4200260043 creator A5039069564 @default.
- W4200260043 creator A5063120583 @default.
- W4200260043 creator A5067271421 @default.
- W4200260043 creator A5069612314 @default.
- W4200260043 creator A5075661792 @default.
- W4200260043 date "2021-12-29" @default.
- W4200260043 modified "2023-09-23" @default.
- W4200260043 title "Downlink Transmission And Channel Estimation For Cell-Free Massive MIMO-OFDM With Symbol Time Offset" @default.
- W4200260043 doi "https://doi.org/10.21203/rs.3.rs-1198135/v1" @default.
- W4200260043 hasPublicationYear "2021" @default.
- W4200260043 type Work @default.
- W4200260043 citedByCount "0" @default.
- W4200260043 crossrefType "posted-content" @default.
- W4200260043 hasAuthorship W4200260043A5016198367 @default.
- W4200260043 hasAuthorship W4200260043A5022015602 @default.
- W4200260043 hasAuthorship W4200260043A5039069564 @default.
- W4200260043 hasAuthorship W4200260043A5063120583 @default.
- W4200260043 hasAuthorship W4200260043A5067271421 @default.
- W4200260043 hasAuthorship W4200260043A5069612314 @default.
- W4200260043 hasAuthorship W4200260043A5075661792 @default.
- W4200260043 hasBestOaLocation W42002600431 @default.
- W4200260043 hasConcept C11413529 @default.
- W4200260043 hasConcept C127162648 @default.
- W4200260043 hasConcept C127413603 @default.
- W4200260043 hasConcept C138660444 @default.
- W4200260043 hasConcept C148063708 @default.
- W4200260043 hasConcept C160562895 @default.
- W4200260043 hasConcept C198329298 @default.
- W4200260043 hasConcept C207987634 @default.
- W4200260043 hasConcept C24326235 @default.
- W4200260043 hasConcept C40409654 @default.
- W4200260043 hasConcept C41008148 @default.
- W4200260043 hasConcept C555944384 @default.
- W4200260043 hasConcept C761482 @default.
- W4200260043 hasConcept C76155785 @default.
- W4200260043 hasConceptScore W4200260043C11413529 @default.
- W4200260043 hasConceptScore W4200260043C127162648 @default.
- W4200260043 hasConceptScore W4200260043C127413603 @default.
- W4200260043 hasConceptScore W4200260043C138660444 @default.
- W4200260043 hasConceptScore W4200260043C148063708 @default.
- W4200260043 hasConceptScore W4200260043C160562895 @default.
- W4200260043 hasConceptScore W4200260043C198329298 @default.
- W4200260043 hasConceptScore W4200260043C207987634 @default.
- W4200260043 hasConceptScore W4200260043C24326235 @default.
- W4200260043 hasConceptScore W4200260043C40409654 @default.
- W4200260043 hasConceptScore W4200260043C41008148 @default.
- W4200260043 hasConceptScore W4200260043C555944384 @default.
- W4200260043 hasConceptScore W4200260043C761482 @default.
- W4200260043 hasConceptScore W4200260043C76155785 @default.
- W4200260043 hasLocation W42002600431 @default.
- W4200260043 hasOpenAccess W4200260043 @default.
- W4200260043 hasPrimaryLocation W42002600431 @default.
- W4200260043 hasRelatedWork W2032100161 @default.
- W4200260043 hasRelatedWork W2094167802 @default.
- W4200260043 hasRelatedWork W2136509110 @default.
- W4200260043 hasRelatedWork W2156019265 @default.
- W4200260043 hasRelatedWork W2171988900 @default.
- W4200260043 hasRelatedWork W2611998394 @default.
- W4200260043 hasRelatedWork W3092731089 @default.
- W4200260043 hasRelatedWork W3197035501 @default.
- W4200260043 hasRelatedWork W4287642618 @default.
- W4200260043 hasRelatedWork W4291722335 @default.
- W4200260043 isParatext "false" @default.
- W4200260043 isRetracted "false" @default.
- W4200260043 workType "article" @default.