	US 12,438,583 B2
	Methods and apparatuses for reducing feedback overhead
Marcus Grossmann, Eindhoven (NL); Ramireddy Venkatesh, Eindhoven (NL); and Markus Landmann, Eindhoven (NL)
Assigned to Koninklijke Philips N.V., Eindhoven (NL)
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
Filed on May 29, 2024, as Appl. No. 18/676,535.
Application 18/676,535 is a continuation of application No. 17/551,711, filed on Dec. 15, 2021, granted, now 12,021,591.
Application 17/551,711 is a continuation of application No. 17/264,667, granted, now 11,223,407, previously published as PCT/EP2018/081125, filed on Nov. 13, 2018.
Prior Publication US 2024/0313842 A1, Sep. 19, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/02 (2018.01); H04B 7/0456 (2017.01); H04B 7/06 (2006.01)

CPC H04B 7/0626 (2013.01) [H04B 7/0456 (2013.01)]

25 Claims

1. A method comprising:

decomposing each (i,j)-th combining coefficient of a precoder matrix W₂^(r)into at least two coefficients,

wherein r denotes a r-th transmission layer,

wherein the (i,j)-th combining coefficient is associated with a i-th beam and a j-th delay,

wherein each combining coefficient is associated with an amplitude and a phase-information,

wherein the decomposed (i,j)-th combining-coefficient of the matrix W₂^(r)is given by:

[W₂^(r)]_i,ja_ib_i,

wherein b_i,jis a complex-valued normalized combining coefficient associated with the i-th beam and j-th delay,

wherein a_iis a real-valued coefficient representing a common amplitude for the combining coefficients for all delays associated with the i-th beam;

quantizing each of the at least two coefficients with at least one bit; and

reporting the amplitude and phase values of quantized non-zero coefficients b_i,j.