Title:
WIRELESS DEVICE, SIGNAL DETECTION METHOD, NON-TEMPORARY COMPUTER-READABLE MEDIUM, AND WIRELESS COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/075405
Kind Code:
A1
Abstract:
Provided is a wireless device that enables the amount of computation necessary to suppress interference signals to be reduced. A wireless device (1) according to the present invention comprises: a spatial transformation unit (2) that performs spatial transformation on a reception signal, which is received through a plurality of antennas and includes a desired signal and an interference signal, and calculates a first beam space reception signal vector; a beam selection unit (3) that selects at least two elements from the first beam space reception signal vector, and generates a second beam space reception signal vector; and an interference-suppressing/synthesis unit (4) that estimates a covariance matrix for an interference-noise signal that includes an interference signal and a noise signal included in the second beam space reception signal vector, generates a reception weight by using the covariance matrix, and detects the desired signal on the basis of the reception weight and the second beam space reception signal vector.
Inventors:
SHIKIDA JUN (JP)
ISHII NAOTO (JP)
ISHII NAOTO (JP)
Application Number:
PCT/JP2019/033483
Publication Date:
April 16, 2020
Filing Date:
August 27, 2019
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H04B7/0413; H04B7/08
Foreign References:
| JP2013197671A | 2013-09-30 |
Other References:
SHIKIDA, JUN ET AL.: "Beam sparse Channel Estimation Using Multiple DFT Matrices for Massive MIMO Systems", IEICE TECHNICAL REPORT, vol. 117, no. 456, 21 February 2018 (2018-02-21), pages 405 - 410, XP033535317
SHIKIDA, JUN ET AL.: "Uplink Transmission Performance Applying Beam Space Channel Estimation to Massive MIMO Systems", IEICE TECHNICAL REPORT, vol. 117, no. 456, 21 February 2018 (2018-02-21), pages 399 - 404
ROBERT M. TAYLOR JR. ET AL.: "A Novel Synchronization, Channel Estimation, and Frequency Domain Multichannel Equalization Technique for Single Carrier MIMO System", ICCCE 2006, 11 May 2006 (2006-05-11), XP055701164
LARS THIELE ET AL.: "On the Value of synchronous Downlink MIMO-OFDMA Systems with Linear Equalizers", IEEE ISWCS 2008, 2008, XP031380373
XIONG XIN ET AL.: "Beam-Domain Channel Estimation for FDD Massive MIMO Systems With Optimal Thresholds", IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, vol. 16, no. 7, 10 May 2017 (2017-05-10), pages 4669 - 4682, XP011656163, DOI: 10.1109/TWC.2017.2701371
SHIKIDA, JUN ET AL.: "Uplink Transmission Performance Applying Beam Space Channel Estimation to Massive MIMO Systems", IEICE TECHNICAL REPORT, vol. 117, no. 456, 21 February 2018 (2018-02-21), pages 399 - 404
ROBERT M. TAYLOR JR. ET AL.: "A Novel Synchronization, Channel Estimation, and Frequency Domain Multichannel Equalization Technique for Single Carrier MIMO System", ICCCE 2006, 11 May 2006 (2006-05-11), XP055701164
LARS THIELE ET AL.: "On the Value of synchronous Downlink MIMO-OFDMA Systems with Linear Equalizers", IEEE ISWCS 2008, 2008, XP031380373
XIONG XIN ET AL.: "Beam-Domain Channel Estimation for FDD Massive MIMO Systems With Optimal Thresholds", IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, vol. 16, no. 7, 10 May 2017 (2017-05-10), pages 4669 - 4682, XP011656163, DOI: 10.1109/TWC.2017.2701371
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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