Wireless communication apparatus, method, and recording medium

Patent metadata

Field	Value
Publication number	US-2018270087-A1
Application number	US-201815909197-A
Country	US
Kind code	A1
Filing date	Mar 1, 2018
Priority date	Mar 15, 2017
Publication date	Sep 20, 2018
Grant date	—

Abstract

To enable use of channel related information more suitable for propagation environment. A wireless communication apparatus according to an example aspect of the present invention includes: a memory storing instructions; and one or more processors configured to execute the instructions to: acquire correlation information regarding correlation between first channel related information generated through channel estimation for a first estimation period and second channel related information generated through channel estimation for one or more estimation periods before the first estimation period; and perform control for a statistic of channel related information, based on the correlation information.

First claim

What is claimed is:

1 . A wireless communication apparatus comprising:
a memory storing instructions; and one or more processors configured to execute the instructions to:
acquire correlation information regarding correlation between first channel related information generated through channel estimation for a first estimation period and second channel related information generated through channel estimation for one or more estimation periods before the first estimation period; and
perform control for a statistic of channel related information, based on the correlation information.

2 . The wireless communication apparatus according to claim 1 , wherein the statistic is a mean value of channel related information.

3 . The wireless communication apparatus according to claim 2 , wherein the mean value is a mean value of channel related information generated through channel estimation for the first estimation period and channel related information generated through channel estimation for a second estimation period immediately before the first estimation period.

4 . The wireless communication apparatus according to claim 2 , wherein the mean value is a mean value of channel related information generated through channel estimation for the first estimation period and an earlier mean value of channel related information generated through channel estimation for multiple estimation periods before the first estimation period.

5 . The wireless communication apparatus according to claim 1 , wherein the control is determination whether to use the statistic.

6 . The wireless communication apparatus according to claim 5 , wherein the control is determination whether to use the statistic or to use channel related information generated through channel estimation for the first estimation period.

7 . The wireless communication apparatus according to claim 5 wherein
the correlation information is information indicating degree of correlation between the first channel related information and the second channel related information, and
the one or more processors are configured to execute the instructions to determine to use the statistic in a case that the degree of correlation indicated by the correlation information is higher than predetermined degree of correlation.

8 . The wireless communication apparatus according to claim 7 , wherein the one or more processors are configured to execute the instructions to determine to use channel related information generated through channel estimation for the first estimation period in a case that the degree of correlation indicated by the correlation information is lower than the predetermined degree of correlation.

9 . The wireless communication apparatus according to claim 1 , wherein the control is determination of a parameter to be used for calculation of the statistic.

10 . The wireless communication apparatus according to claim 9 , wherein
the statistic is a weighted mean value of channel related information, and the parameter is weighting factors to be used for calculation of weighted mean value.

11 . The wireless communication apparatus according to claim 1 , wherein the second channel related information is channel related information generated through channel estimation for a second estimation period immediately before the first estimation period.

12 . The wireless communication apparatus according to claim 1 , wherein the second channel related information is a statistic of channel related information generated through channel estimation for multiple estimation periods before the first estimation period.

13 . The wireless communication apparatus according to claim 1 , wherein the first channel related information and the second channel related information are channel related information generated through channel estimation for an entire frequency band.

14 . The wireless communication apparatus according to claim 1 , wherein the first channel related information and the second channel related information are channel related information generated through channel estimation for part of a frequency band.

15 . The wireless communication apparatus according to claim 13 , wherein the frequency band is a frequency band allocated to a terminal apparatus.

16 . The wireless communication apparatus according to claim 13 , wherein the frequency band is a system band.

17 . The wireless communication apparatus according to claim 1 , wherein the first channel related information, the second channel related information, and the channel related information are channel estimation values.

18 . The wireless communication apparatus according to claim 1 , wherein the one or more processors are configured to execute the instructions to determine a cycle for calculating an eigenvalue and eigenvector or beamforming weights from a channel estimation value, based on control information indicating a result of the control or the correlation information.

19 . A method comprising:
acquiring correlation information regarding correlation between first channel related information generated through channel estimation for a first estimation period and second channel related information generated through channel estimation for one or more estimation periods before the first estimation period; and performing control for a statistic of channel related information, based on the correlation information.

20 . A non-transitory computer readable recording medium recording a program for causing a processor to execute:
acquiring correlation information regarding correlation between first channel related information generated through channel estimation for a first estimation period and second channel related information generated through channel estimation for one or more estimation periods before the first estimation period; and performing control for a statistic of channel related information, based on the correlation information.

Assignees

• Nec Corp

Inventors

• Yamazaki Kenichiro

Classifications

• H04L25/0252

  using third or higher order statistics · CPC title

• H04L25/021

  Estimation of channel covariance · CPC title

• H04L25/0224 Primary

  using sounding signals · CPC title

• H04L25/025 Primary

  using least-mean-square [LMS] method · CPC title

• H04L25/0208

  Electricity · mapped topic