Evaluating inter-symbol interference caused by self-interference

Patent metadata

Field	Value
Publication number	US-2025184189-A1
Application number	US-202218727361-A
Country	US
Kind code	A1
Filing date	Jan 17, 2022
Priority date	Jan 17, 2022
Publication date	Jun 5, 2025
Grant date	—

Abstract

Disclosed is a method comprising receiving, by a repeater, a set of symbols; transmitting, by the repeater, a subset of the set of symbols via a beam with a plurality of polarization configurations; measuring, by the repeater, a power delay profile per symbol of the set of symbols; evaluating, by the repeater, based at least partly on the measuring of the power delay profile, inter-symbol interference caused by self-interference per symbol of the transmitted subset of the set of symbols; and configuring, by the repeater, the beam based at least partly on the evaluated inter-symbol interference.

First claim

1 - 16 . (canceled)

17 . An apparatus comprising at least one processor, and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:
receive a set of symbols; transmit a subset of the set of symbols via a beam with a plurality of polarization configurations; measure a power delay profile per symbol of the set of symbols; evaluate, based at least partly on the measuring of the power delay profile, inter-symbol interference caused by self-interference per symbol of the transmitted subset of the set of symbols; and configure the beam based at least partly on the evaluated inter-symbol interference.

18 . An apparatus according to claim 17 , wherein the inter-symbol interference caused by self-interference is evaluated based on a difference between the measured power delay profile of a non-transmitted symbol of the set of symbols and the transmitted subset of the set of symbols.

19 . An apparatus according to claim 17 , wherein the apparatus is further caused to:
determine, from the plurality of polarization configurations, one or more polarization configurations with lower than a threshold or with no inter-symbol interference caused by self-interference based on the evaluating, wherein the beam is configured with one of the one or more polarization configurations with lower than the threshold or with no inter-symbol interference caused by self-interference.

20 . An apparatus according to claim 17 , wherein the apparatus is further caused to:
omit the beam based at least partly on the evaluated inter-symbol interference.

21 . An apparatus according to claim 17 , wherein the apparatus is further caused to:
reduce an amplification level for the beam based at least partly on the evaluated inter-symbol interference.

22 . An apparatus according to claim 17 , wherein the plurality of polarization configurations comprise:
configuring the beam for co-polarization and cross-polarization transmission for a first symbol of the set of symbols; configuring the beam for co-polarization transmission for a second symbol of the set of symbols; and configuring the beam for cross-polarization transmission for a third symbol of the set of symbols, wherein the transmitted subset of the set of symbols comprises the first symbol, the second symbol, and the third symbol.

23 . An apparatus according to claim 17 , wherein the apparatus is further caused to:
configure the beam for no transmission for a fourth symbol of the set of symbols, wherein the fourth symbol is not transmitted upon transmitting the subset of the set of symbols.

24 . An apparatus according to claim 17 , wherein the set of symbols is comprised in a synchronization signal block.

25 . An apparatus according to claim 24 , wherein the apparatus is further caused to:
determine whether a synchronization signal block burst comprising the synchronization signal block is configured to be measured by a terminal device, wherein the subset of the set of symbols is transmitted in response to determining that the synchronization signal block burst is not configured to be measured by the terminal device.

26 . An apparatus according to claim 24 , wherein the apparatus is further caused to:
determine whether the synchronization signal block is intended for the apparatus, wherein the subset of the set of symbols is transmitted in response to determining that the synchronization signal block is intended for the apparatus.

27 . An apparatus according to claim 17 , wherein the apparatus comprises a repeater, or is comprised in a repeater.

28 . A method comprising:
receiving, by a repeater, a set of symbols; transmitting, by the repeater, a subset of the set of symbols via a beam with a plurality of polarization configurations; measuring, by the repeater, a power delay profile per symbol of the set of symbols; evaluating, by the repeater, based at least partly on the measuring of the power delay profile, inter-symbol interference caused by self-interference per symbol of the transmitted subset of the set of symbols; and configuring, by the repeater, the beam based at least partly on the evaluated inter-symbol interference.

29 . A computer program comprising instructions for causing an apparatus to perform at least the following:
receiving a set of symbols; transmitting a subset of the set of symbols via a beam with a plurality of polarization configurations; measuring a power delay profile per symbol of the set of symbols; evaluating, based at least partly on the measuring of the power delay profile, inter-symbol interference caused by self-interference per symbol of the transmitted subset of the set of symbols; and configuring the beam based at least partly on the evaluated inter-symbol interference.

30 . A system comprising at least a repeater and an access point of a wireless communication network;
wherein the access point is configured to: transmit a set of symbols to the repeater; wherein the repeater is configured to: receive the set of symbols from the access point; transmit a subset of the set of symbols via a beam with a plurality of polarization configurations; measure a power delay profile per symbol of the set of symbols; evaluate, based at least partly on the measuring of the power delay profile, inter-symbol interference caused by self-interference per symbol of the transmitted subset of the set of symbols; and configure the beam based at least partly on the evaluated inter-symbol interference.

Assignees

• Nokia Technologies Oy

Inventors

• Svendsen Simon
• Mueller Axel
• Rom Christian
• Olesen Poul
• Toft Morten
• Karimidehkordi Ali
• Kapuruhamy Badalge Shashika Manosha

Classifications

• H04B17/364 Primary

  Delay profiles · CPC title

• H04L25/03006 Primary

  Arrangements for removing intersymbol interference · CPC title