US 12,250,039 B1
Apparatus and method for a communication system
Bala Venkata Ramulu Gorantla, Bangalore (IN); Suresh Kalyanasundaram, Bangalore (IN); and Shalini Gulati, Bangalore (IN)
Assigned to Nokia Solutions and Networks Oy, Espoo (FI)
Filed by Nokia Solutions and Networks Oy, Espoo (FI)
Filed on Aug. 13, 2024, as Appl. No. 18/802,443.
Claims priority of application No. 20235913 (FI), filed on Aug. 14, 2023.
Int. Cl. H04B 7/06 (2006.01); H04L 5/00 (2006.01); H04W 24/10 (2009.01)
CPC H04B 7/0617 (2013.01) [H04L 5/0051 (2013.01); H04W 24/10 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An apparatus for a communication system, the apparatus comprising:
at least one processor, and
at least one memory storing instructions that, when executed by the at least one processor cause the processor to:
determine a first measurement (RS-M-1) of first reference signals associated with a first analog beam used to receive the first reference signals (RS-1),
determine a second measurement (RS-M-2) of second reference signals (RS-2) associated with a second analog beam used to receive the second reference signals (RS-2),
determine first information (I-1) characterizing a digital beamformer (DBF) based on the first measurement (RS-M-1) and the second measurement (RS-M-2), wherein the instructions when executed by the at least one processor, cause the apparatus to:
determine a measurement vector (MV) characterizing the first and second reference signals (RS-1, RS-2) based on the first measurement (RS-M-1) and the second measurement (RS-M-2),
determine a first covariance matrix (CV-M-1) based on the measurement vector (MV),
determine a second covariance matrix (CV-M-2), which is associated with at least one of the first analog beam and the second analog beam, based on first covariance matrix (CV-M-1),
determine the first information (I-1) characterizing the digital beamformer (DBF) based on the second covariance matrix (CV-M-2),
perform digital beamforming using the digital beamformer (DBF) in a first direction (DIR-1), and
perform analog beamforming in a second direction (DIR-2), which is different from the first direction.