US 12,132,531 B2
Coherent summing of signals from distributed radio access points
Magnus Nilsson, Lund (SE); Peter Jakobsson, Lund (SE); Jan Celander, Malmö (SE); Martin Isberg, Lund (SE); Torsten Carlsson, Lund (SE); and Magnus Sandgren, Staffanstorp (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 18/021,851
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Aug. 20, 2020, PCT No. PCT/EP2020/073387
§ 371(c)(1), (2) Date Feb. 17, 2023,
PCT Pub. No. WO2022/037784, PCT Pub. Date Feb. 24, 2022.
Prior Publication US 2023/0379009 A1, Nov. 23, 2023
Int. Cl. H04B 7/024 (2017.01); H04B 7/08 (2006.01)
CPC H04B 7/024 (2013.01) [H04B 7/0857 (2013.01)] 19 Claims
OG exemplary drawing
 
18. An antenna processing node, for use in a distributed wireless system that comprises a controlling node, the antenna processing node, and one or more additional antenna processing nodes, each of the antenna processing nodes being communicatively coupled to the controlling node but spatially separated from each other and from the controlling node, wherein the antenna processing node comprises:
radio circuitry configured to communicate wirelessly with one or more wireless devices;
serial interface circuitry configured to communicate over a serial link with the controlling node; and
a processing circuit operatively coupled to the serial interface circuitry and configured to:
receive one or more wireless transmissions from a wireless device and obtain first symbol values from the one or more wireless transmissions;
receive second symbol values from a second antenna processing node, the second symbol values corresponding to the one or more wireless transmissions as received at the second antenna processing node;
calculate a first weight parameter based on at least a subset of the first symbol values and a corresponding subset of the second symbol values;
calculate third symbol values by computing a weighted sum of first symbol values and corresponding ones of the second symbol values, using the first weight parameter; and
send the third symbol values to a third antenna processing node or to the controlling node.