Estimation of a response of a radio channel, and its applications

Patent metadata

Field	Value
Publication number	US-2026058737-A1
Application number	US-202519252569-A
Country	US
Kind code	A1
Filing date	Jun 27, 2025
Priority date	Jul 8, 2024
Publication date	Feb 26, 2026
Grant date	—

Abstract

An apparatus comprising:
means for using a signal transmitted by first transmitter circuitry that is coupled, within the apparatus, to and received by first receiver circuitry and a signal transmitted by the first transmitter circuitry that is coupled, within the apparatus, to and received by second receiver circuitry to determine different reception compensation for application to a signal received at the first receiver circuitry and to a signal received at the second receiver circuitry; means for using a signal transmitted by the first transmitter circuitry that is coupled, within the apparatus, to and received by the first receiver circuitry and a signal transmitted by second transmitter circuitry that is coupled, within the apparatus, to and received by the first receiver circuitry to determine the different transmission compensation for application to a signal transmitted by the first transmitter circuitry and to a signal transmitted by the second transmitter circuitry.

First claim

1 - 15 . (canceled)

16 . An apparatus comprising:
first receiver circuitry for receiving a signal; first transmitter circuitry for transmitting a signal; second receiver circuitry for receiving a signal; second transmitter circuitry for transmitting a signal; at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus to perform: applying different reception compensation to a signal received at the first receiver circuitry and to a signal received at the second receiver circuitry; applying different transmission compensation to a signal transmitted by the first transmitter circuitry and to a signal transmitted by the second transmitter circuitry; calibrating the different reception compensation and the different transmission compensation comprising:
coupling the first transmitter circuitry, within the apparatus, to the first receiver circuitry wherein a signal transmitted by the first transmitter circuitry is coupled, within the apparatus, for reception by the first receiver circuitry;
coupling the first transmitter circuitry, within the apparatus, to the second receiver circuitry wherein a signal transmitted by the first transmitter circuitry is coupled, within the apparatus, for reception by the second receiver circuitry;
coupling the second transmitter circuitry, within the apparatus, to the first receiver circuitry wherein a signal transmitted by the second transmitter circuitry is coupled, within the apparatus, for reception by the first receiver circuitry;
using a signal transmitted by the first transmitter circuitry that is coupled, within the apparatus, to and received by the first receiver circuitry and a signal transmitted by the first transmitter circuitry that is coupled, within the apparatus, to and received by the second receiver circuitry to determine the different reception compensation for application to a signal received at the first receiver circuitry and to a signal received at the second receiver circuitry;
using a signal transmitted by the first transmitter circuitry that is coupled, within the apparatus, to and received by the first receiver circuitry and a signal transmitted by the second transmitter circuitry that is coupled, within the apparatus, to and received by the first receiver circuitry to determine the different transmission compensation for application to a signal transmitted by the first transmitter circuitry and to a signal transmitted by the second transmitter circuitry.

17 . An apparatus as claimed in claim 16 , further comprising:
third receiver circuitry for receiving a signal; and the apparatus is caused to perform: applying different reception compensation to signals received at different receiver circuitry; calibrating the different reception compensation comprising:
coupling transmitter circuitry, within the apparatus, to the third receiver circuitry wherein a signal transmitted by the transmitter circuitry is coupled, within the apparatus, for reception by the third receiver circuitry;
using a signal transmitted by the transmitter circuitry that is coupled, within the apparatus, to and received by the third receiver circuitry and a signal transmitted by the transmitter circuitry that is coupled, within the apparatus, to and received by another receiver circuitry to determine the different reception compensation for application to a signal received at the third receiver circuitry and to a signal received at the other receiver circuitry.

18 . An apparatus as claimed in claim 16 , further comprising:
third receiver circuitry for receiving a signal; and the apparatus is caused to perform: calibrating the different reception compensation comprising:
coupling the second transmitter circuitry, within the apparatus, to the third receiver circuitry wherein a signal transmitted by the second transmitter circuitry is coupled, within the apparatus, for reception by the third receiver circuitry;
coupling the second transmitter circuitry, within the apparatus, to the second receiver circuitry wherein a signal transmitted by the second transmitter circuitry is coupled, within the apparatus, for reception by the second receiver circuitry;
using a signal transmitted by the second transmitter circuitry that is coupled, within the apparatus, to and received by the second receiver circuitry and a signal transmitted by the second transmitter circuitry that is coupled, within the apparatus, to and received by the third receiver circuitry to determine the different reception compensation for application to a signal received at the second receiver circuitry and to a signal received at the third receiver circuitry.

19 . An apparatus as claimed in claim 16 , further comprising:
third transmitter circuitry for transmitting a signal; and the apparatus is caused to perform: applying different transmission compensation to signals transmitted by different transmitter circuitry; calibrating the different transmission compensation comprising:
coupling the third transmitter circuitry, within the apparatus, to receiver circuitry wherein a signal transmitted by the third transmitter circuitry is coupled, within the apparatus, for reception by the receiver circuitry;
using a signal transmitted by the third transmitter circuitry that is coupled, within the apparatus, to and received by the receiver circuitry and a signal transmitted by another transmitter circuitry that is coupled, within the apparatus, to and received by the receiver circuitry to determine the different transmission compensation for application to a signal transmitted by the third transmitter circuitry and to a signal transmitted by the other transmitter circuitry.

20 . An apparatus as claimed in claim 16 , wherein the apparatus is further caused to perform:
calibrating the different transmission compensation comprising:
coupling the third transmitter circuitry, within the apparatus, to the second receiver circuitry wherein a signal transmitted by the third transmitter circuitry is coupled, within the apparatus, for reception by the second receiver circuitry;
coupling the second transmitter circuitry, within the apparatus, to the second receiver circuitry wherein a signal transmitted by the second transmitter circuitry is coupled, within the apparatus, for reception by the second receiver circuitry;
using a signal transmitted by the second transmitter circuitry that is coupled, within the apparatus, to and received by the second receiver circuitry and a signal transmitted by the third transmitter circuitry that is coupled, within the apparatus, to and received by the second receiver circuitry to determine the different reception compensation for application to a signal transmitted by the second transmitter circuitry and to a signal transmitted by the third transmitter circuitry.

21 . An apparatus as claimed in claim 16 , further comprising multiple different receiver circuitry, wherein one of the multiple different receiver circuitry is the first receiver circuitry and wherein one of the multiple different receiver circuitry is the second receiver circuitry.

22 . An apparatus as claimed in claim 16 , wherein the apparatus is further caused to perform:
calibrating the different reception compensation comprising:
dividing a baseband symbol received at the first receiver circuitry by a baseband symbol transmitted by the first transmitter circuitry coupled to the first receiver circuitry to obtain a mutual-combined transfer function for the first transmitter circuitry and the first receiver circuitry;
dividing a baseband symbol received at the second receiver circuitry by a baseband symbol transmitted by the first transmitter circuitry coupled to the second r

Assignees

• Nokia Technologies Oy

Inventors

• Olesen Poul
• Rom Christian
• Vook Frederick
• Mahendra Rachit
• Bellur Vinayak
• Rose Luca

Classifications

• H04B17/22

  for calibration of the receiver components · CPC title

• H04B17/21

  for calibration; for correcting measurements · CPC title

• H04B17/12 Primary

  of transmit antennas, e.g. of the amplitude or phase · CPC title

• H04B17/14 Primary

  of the whole transmission and reception path, e.g. self-test loop-back · CPC title