Matches in SemOpenAlex for { <https://semopenalex.org/work/W4214859868> ?p ?o ?g. }
Showing items 1 to 82 of
82
with 100 items per page.
- W4214859868 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 delay spread differences (DSDs). Since DSDs 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 DSDs 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 form to achieve convex approximation. Then, considering the impact of DSDs 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 and demodulation reference signal. The 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.
- W4214859868 created "2022-03-05" @default.
- W4214859868 creator A5016198367 @default.
- W4214859868 creator A5022015602 @default.
- W4214859868 creator A5039069564 @default.
- W4214859868 creator A5065929065 @default.
- W4214859868 creator A5067271421 @default.
- W4214859868 creator A5069612314 @default.
- W4214859868 creator A5075661792 @default.
- W4214859868 date "2022-03-02" @default.
- W4214859868 modified "2023-09-25" @default.
- W4214859868 title "Downlink transmission and channel estimation for cell-free massive MIMO-OFDM with DSDs" @default.
- W4214859868 cites W1522316860 @default.
- W4214859868 cites W2105235982 @default.
- W4214859868 cites W2141658588 @default.
- W4214859868 cites W2162841150 @default.
- W4214859868 cites W2286275639 @default.
- W4214859868 cites W2610350904 @default.
- W4214859868 cites W2742503793 @default.
- W4214859868 cites W2802772719 @default.
- W4214859868 cites W2928963866 @default.
- W4214859868 cites W2966396250 @default.
- W4214859868 cites W2981134958 @default.
- W4214859868 cites W2984423829 @default.
- W4214859868 cites W3046585339 @default.
- W4214859868 cites W3110989801 @default.
- W4214859868 cites W3171146543 @default.
- W4214859868 cites W4250589301 @default.
- W4214859868 doi "https://doi.org/10.1186/s13634-022-00847-6" @default.
- W4214859868 hasPublicationYear "2022" @default.
- W4214859868 type Work @default.
- W4214859868 citedByCount "2" @default.
- W4214859868 countsByYear W42148598682023 @default.
- W4214859868 crossrefType "journal-article" @default.
- W4214859868 hasAuthorship W4214859868A5016198367 @default.
- W4214859868 hasAuthorship W4214859868A5022015602 @default.
- W4214859868 hasAuthorship W4214859868A5039069564 @default.
- W4214859868 hasAuthorship W4214859868A5065929065 @default.
- W4214859868 hasAuthorship W4214859868A5067271421 @default.
- W4214859868 hasAuthorship W4214859868A5069612314 @default.
- W4214859868 hasAuthorship W4214859868A5075661792 @default.
- W4214859868 hasBestOaLocation W42148598681 @default.
- W4214859868 hasConcept C11413529 @default.
- W4214859868 hasConcept C127162648 @default.
- W4214859868 hasConcept C138660444 @default.
- W4214859868 hasConcept C160562895 @default.
- W4214859868 hasConcept C207987634 @default.
- W4214859868 hasConcept C40409654 @default.
- W4214859868 hasConcept C41008148 @default.
- W4214859868 hasConcept C761482 @default.
- W4214859868 hasConcept C76155785 @default.
- W4214859868 hasConceptScore W4214859868C11413529 @default.
- W4214859868 hasConceptScore W4214859868C127162648 @default.
- W4214859868 hasConceptScore W4214859868C138660444 @default.
- W4214859868 hasConceptScore W4214859868C160562895 @default.
- W4214859868 hasConceptScore W4214859868C207987634 @default.
- W4214859868 hasConceptScore W4214859868C40409654 @default.
- W4214859868 hasConceptScore W4214859868C41008148 @default.
- W4214859868 hasConceptScore W4214859868C761482 @default.
- W4214859868 hasConceptScore W4214859868C76155785 @default.
- W4214859868 hasFunder F4320335443 @default.
- W4214859868 hasFunder F4320335473 @default.
- W4214859868 hasFunder F4320335967 @default.
- W4214859868 hasIssue "1" @default.
- W4214859868 hasLocation W42148598681 @default.
- W4214859868 hasLocation W42148598682 @default.
- W4214859868 hasOpenAccess W4214859868 @default.
- W4214859868 hasPrimaryLocation W42148598681 @default.
- W4214859868 hasRelatedWork W1839059238 @default.
- W4214859868 hasRelatedWork W1987076955 @default.
- W4214859868 hasRelatedWork W2012613664 @default.
- W4214859868 hasRelatedWork W2105889138 @default.
- W4214859868 hasRelatedWork W2125492428 @default.
- W4214859868 hasRelatedWork W2129447772 @default.
- W4214859868 hasRelatedWork W2587236994 @default.
- W4214859868 hasRelatedWork W3092731089 @default.
- W4214859868 hasRelatedWork W3190774574 @default.
- W4214859868 hasRelatedWork W4386066511 @default.
- W4214859868 hasVolume "2022" @default.
- W4214859868 isParatext "false" @default.
- W4214859868 isRetracted "false" @default.
- W4214859868 workType "article" @default.