Title (en)
Method and system for mixed analog/digital beamforming in wireless communication systems
Title (de)
Verfahren und System zur gemischten analogen/digitalen Strahlformung in drahtlosen Kommunikationssystemen
Title (fr)
Procédé et système de formation de faisceaux analogiques/numériques mixtes dans des systèmes de communication sans fil
Publication
EP 2388931 A2 20111123 (EN)
Application
EP 11164879 A 20110505
Priority
US 34731110 P 20100521
Abstract (en)
The present invention is related to a method for mixed analog/digital beamforming in a wireless communication system having a plurality of transmit
antennas and receive antennas and a plurality of analog front-ends connected to the plurality of transmit and receive antennas, at least two analog
front-ends being connected to either the transmit antennas or the receive antennas. The method comprises the steps of determining transmit and
receive analog beamforming coefficients and transmit and receive digital beamforming coefficients by - determining information representative
of communication channels formed between a transmit antenna and a receive antenna of the plurality of antennas, - defining a set of coefficients
representing the transmit analog beamforming coefficients and the receive analog beamforming coefficients, - determining a beamforming cost
function using the information and the set of coefficients, the beamforming cost function taking into account the plurality of analog front-ends, computing an optimized set of coefficients by exploiting the beamforming cost function, the optimized set of coefficients comprising optimized
transmit analog beamforming coefficients and optimized receive analog beamforming coefficients - deriving an estimate of the frequency responses
of the communication channels using the information determined in the first step - deriving for each communication channel transmit digital
beamforming coefficients and receive digital beamforming coefficients using the estimated frequency responses and the optimized transmit and
receive analog beamforming coefficients.
Inventor
• NSENGA JIMMY (BE)
• BOURDOUX ANDRE (BE)
Applicant
• IMEC (BE)
• CETIC ASBL (BE)
IPC 8 full level (invention and additional information)
H04B 7/06 (2006.01); H04B 7/08 (2006.01)
CPC (invention and additional information)
H04B 7/0617 (2013.01); H04B 7/0848 (2013.01); H04B 7/086 (2013.01)
Citation (applicant)
• DANIEL P. PALOMAR ET AL.: 'Joint Tx-Rx Beamforming Design for Multicarrier MIMO Channels: A Unified Framework for Convex
Optimization' IEEE TRANS. ON SIGNAL PROC. vol. 51, September 2003, pages 2381 - 2401
• A.P.SERTE: 'Joint Beamforming Strategies in OFDM-MIMO Systems' ACOUSTICS, SPEECH AND SIGNAL PROCESSING vol. 3,
May 2002, pages 2845 - 2848
• SANAYEI ET AL.: 'Antenna selection in MIMO system' IEEE COMM. MAGAZINE vol. 42, October 2004, pages 68 - 73
• P.D.KARAMALIS ET AL.: 'Adaptive Antenna Subarray Formation for MIMO Systems' IEEE TRANS. WIRELESS COMM. vol. 5, no.
11, 2006, pages 2977 - 2982
• X. ZHANG ET AL.: 'Variable-phase-shift-based RF-baseband codesign for MIMO antenna selection' IEEE TRANS. SIGNAL
PROCESSING vol. 53, November 2005, pages 4091 - 4103
Citation (search report)
• [A] EP 0480737 A2 19920415 - TEXAS INSTRUMENTS INC [US]
• [A] PANAGIOTIS THEOFILAKOS ET AL: "Receive Antenna Subarray Formation for MIMO Systems in Correlated Channels", IEEE
INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS. PIMRC, IEEE; PI, XX, 1
September 2007 (2007-09-01), pages 1-5, XP031168828, ISBN: 978-1-4244-1143-6
• [A] ATHANASIOS G KANATAS: "A Receive Antenna Subarray Formation Algorithm for MIMO Systems", IEEE COMMUNICATIONS
LETTERS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 11, no. 5, 1 May 2007 (2007-05-01), pages 396-398,
XP011181395, ISSN: 1089-7798, DOI: 10.1109/LCOMM.2007.062121
• [I] KUNG S-Y ET AL: "Variable-Phase-Shift-Based RF-Baseband Codesign for MIMO Antenna Selection", IEEE TRANSACTIONS
ON SIGNAL PROCESSING, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 53, no. 11, 1 November 2005 (2005-11-01),
pages 4091-4103, XP011141123, ISSN: 1053-587X, DOI: 10.1109/TSP.2005.857024
Cited by
WO2015082771A1; EP2742608A2
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
EPO simple patent family
EP 2388931 A2 20111123; EP 2388931 A3 20150311; US 2011291891 A1 20111201; US 8619886 B2 20131231
INPADOC legal status
2015-10-07 [17P] REQUEST FOR EXAMINATION FILED
- Effective date : 20150827
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PT RO RS SE SI SK SM TR
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2015-03-11 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO
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2015-03-11 [RIC1] CLASSIFICATION (CORRECTION)
- IPC : H04B 7/06 20060101AFI20150130BHEP
2015-03-11 [RIC1] CLASSIFICATION (CORRECTION)
- IPC : H04B 7/08 20060101ALI20150130BHEP
2011-11-23 [AK] DESIGNATED CONTRACTING STATES:
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2011-11-23 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO
- Countries concerned : BA ME