US 11,658,711 B2
Skywave large-scale MIMO communication method, model, and system
Xiqi Gao, Nanjing (CN); Xianglong Yu, Nanjing (CN); and Anan Lu, Nanjing (CN)
Assigned to SOUTHEAST UNIVERSITY, Nanjing (CN)
Appl. No. 17/597,778
Filed by SOUTHEAST UNIVERSITY, Nanjing (CN)
PCT Filed Dec. 21, 2020, PCT No. PCT/CN2020/137876
§ 371(c)(1), (2) Date Jan. 22, 2022,
PCT Pub. No. WO2022/104993, PCT Pub. Date May 27, 2022.
Claims priority of application No. 202011300870.2 (CN), filed on Nov. 19, 2020.
Prior Publication US 2022/0376750 A1, Nov. 24, 2022
Int. Cl. H04B 7/04 (2017.01); H04B 7/0456 (2017.01); H04B 17/391 (2015.01); H04B 7/22 (2006.01); H04L 27/26 (2006.01)
CPC H04B 7/0456 (2013.01) [H04B 7/22 (2013.01); H04B 17/391 (2015.01); H04L 27/2602 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A skywave large-scale multiple-input and multiple-output (MIMO) communication method, comprising:
constructing a skywave communication base station in a short waveband using a large-scale antenna array, skywave large-scale MIMO communication being carried out between the skywave communication base station and a user terminal within a coverage area by ionospheric reflection;
determining, by the skywave communication base station, a spacing of the large-scale antenna array according to a maximum operating frequency, and communicating with the user terminal based on a time division duplex (TDD) communication mode, a skywave large-scale MIMO signal being transmitted based on an orthogonal frequency division multiplexing (OFDM) modulation mode or a power efficiency improvement modulation mode;
selecting a communication carrier frequency within a short waveband range according to a real-time ionospheric channel characteristic, and adaptively selecting an OFDM modulation parameter and a signal frame structure; and
scheduling, by the skywave communication base station, users within the coverage area according to statistical channel information of various user terminals to form a space division user group, wherein skywave large-scale MIMO signal transmission is carried out between different user groups and the skywave communication base station using different communication time-frequency resources, and skywave large-scale MIMO signal transmission is carried out between user terminals in the same user group and the skywave communication base station using the same time-frequency resource.