US 11,943,158 B2
Data communication apparatuses, data communication system and methods using reference symbols
Thomas Fehrenbach, Berlin (DE); Thomas Wirth, Kleinmachnow (DE); Baris Goektepe, Berlin (DE); and Dennis Wieruch, Berlin (DE)
Assigned to Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
Filed by Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V, Munich (DE)
Filed on Mar. 15, 2022, as Appl. No. 17/695,751.
Application 17/695,751 is a continuation of application No. 16/272,649, filed on Feb. 11, 2019, granted, now 11,329,777.
Application 16/272,649 is a continuation of application No. PCT/EP2017/070260, filed on Aug. 9, 2017.
Claims priority of application No. 16183896 (EP), filed on Aug. 11, 2016.
Prior Publication US 2022/0393818 A1, Dec. 8, 2022
Int. Cl. H04W 72/12 (2023.01); H04L 5/00 (2006.01); H04L 1/00 (2006.01)
CPC H04L 5/0048 (2013.01) [H04L 5/0053 (2013.01); H04L 5/0094 (2013.01); H04W 72/12 (2013.01); H04L 1/00 (2013.01); H04L 5/0007 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A data communication apparatus, for transmitting one or more blocks of data within a frame comprising a two-dimensional grid of transmission symbol positions,
wherein the data communication apparatus is configured to select a group of transmission symbol positions, which is a subset of the two-dimensional grid of transmission symbol positions, for a transmission of a data portion,
wherein one or more reference symbol positions are associated to the selected group of transmission symbol positions;
wherein the data communication apparatus is configured to determine which one or more symbol positions are used as one or more reference symbol positions based on the selection of the group of transmission symbol positions or together with the selection of the group of transmission symbol positions; and
wherein the reference symbol positions are variable with respect to one or more borders of time slots of the frame or with respect to one or more borders of sub-frames of the frame, and/or
wherein the one or more reference symbol positions are variable with respect to the selected group of transmission symbol positions;
wherein the location of the reference symbol positions with respect to one or more borders of time slots of the frame or with respect to one or more borders of sub-frames of the frame vary in dependence on an actual selection of a group of transmission symbol positions;
wherein the data communication apparatus is configured to select a group of transmission symbol positions with a granularity which is smaller than a length of a sub-frame or which is smaller than a length of a slot.