GB2467145B - Wireless communications methods and apparatus - Google Patents

Wireless communications methods and apparatus

Info

Publication number
GB2467145B
GB2467145B GB0901089A GB0901089A GB2467145B GB 2467145 B GB2467145 B GB 2467145B GB 0901089 A GB0901089 A GB 0901089A GB 0901089 A GB0901089 A GB 0901089A GB 2467145 B GB2467145 B GB 2467145B
Authority
GB
United Kingdom
Prior art keywords
vector
integer
diagonal matrix
data
perturbation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB0901089A
Other versions
GB0901089D0 (en
GB2467145A (en
Inventor
Henning Vetter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Europe Ltd
Original Assignee
Toshiba Research Europe Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Research Europe Ltd filed Critical Toshiba Research Europe Ltd
Priority to GB0901089A priority Critical patent/GB2467145B/en
Publication of GB0901089D0 publication Critical patent/GB0901089D0/en
Publication of GB2467145A publication Critical patent/GB2467145A/en
Application granted granted Critical
Publication of GB2467145B publication Critical patent/GB2467145B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0426—Power distribution
    • H04B7/0434—Power distribution using multiple eigenmodes
    • H04B7/0439—Power distribution using multiple eigenmodes utilizing channel inversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0426—Power distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/046—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account
    • H04B7/0465—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account taking power constraints at power amplifier or emission constraints, e.g. constant modulus, into account
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375—Passband transmission
    • H04L2025/03414—Multicarrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03426—Arrangements for removing intersymbol interference characterised by the type of transmission transmission using multiple-input and multiple-output channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03343—Arrangements at the transmitter end

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Radio Transmission System (AREA)

Abstract

The invention concerns a multiple input multiple output (MIMO) system employing precoding. Information for transmission is represented by a data vector comprising corresponding data for each of the multi-antennae. A perturbation vector is applied to the data vector in order to generate a perturbed data vector. The perturbation vector is formed by multiplying together a diagonal matrix of positive real numbers and a complex integer vector. Each non-zero element of the diagonal matrix comprises a constellation shift parameter for a respective spatial stream. Conventional methods do not support different modulo shift parameters for different spatial streams — they use a scalar rather than a diagonal matrix. The perturbation vector is selected by solving an integer least squares problem such that a normalisation factor is minimised; this involves applying a scaling factor to the integer least squares problem.
GB0901089A 2009-01-22 2009-01-22 Wireless communications methods and apparatus Expired - Fee Related GB2467145B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0901089A GB2467145B (en) 2009-01-22 2009-01-22 Wireless communications methods and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0901089A GB2467145B (en) 2009-01-22 2009-01-22 Wireless communications methods and apparatus

Publications (3)

Publication Number Publication Date
GB0901089D0 GB0901089D0 (en) 2009-03-11
GB2467145A GB2467145A (en) 2010-07-28
GB2467145B true GB2467145B (en) 2011-05-25

Family

ID=40468962

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0901089A Expired - Fee Related GB2467145B (en) 2009-01-22 2009-01-22 Wireless communications methods and apparatus

Country Status (1)

Country Link
GB (1) GB2467145B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070074023A (en) * 2006-01-06 2007-07-12 삼성전자주식회사 Apparatus and method for optimum perturbation of multi antenna multi user communication system
US7317764B2 (en) * 2003-06-11 2008-01-08 Lucent Technologies Inc. Method of signal transmission to multiple users from a multi-element array
WO2008054178A2 (en) * 2006-11-02 2008-05-08 Lg Electronics Inc. Method for transmitting data using phase shift based precoding and transceiver supporting the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7317764B2 (en) * 2003-06-11 2008-01-08 Lucent Technologies Inc. Method of signal transmission to multiple users from a multi-element array
KR20070074023A (en) * 2006-01-06 2007-07-12 삼성전자주식회사 Apparatus and method for optimum perturbation of multi antenna multi user communication system
WO2008054178A2 (en) * 2006-11-02 2008-05-08 Lg Electronics Inc. Method for transmitting data using phase shift based precoding and transceiver supporting the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Wee Seng Chua; Chau Yuen; Chin, F., "A Continuous Vector Perturbation for Multi-Antenna Multi-User Communication," Vehicular Technology Conference, 2007. VTC2007-Spring. IEEE 65th , vol., no., pp.1806-1810, 22-25 April 2007 *

Also Published As

Publication number Publication date
GB0901089D0 (en) 2009-03-11
GB2467145A (en) 2010-07-28

Similar Documents

Publication Publication Date Title
IN2012DN01129A (en)
RU2013126478A (en) SYSTEM AND METHOD FOR TRANSMISSION OF CONTROL INFORMATION FOR TRANSMISSION WITH MANY INPUTS AND MANY OUTPUTS ON THE Ascending Line
WO2010106443A3 (en) Precoding codebook and feedback representation
MX2014002900A (en) Systems and methods to exploit areas of coherence in wireless systems.
WO2008104907A3 (en) Method and apparatus for selecting pre-coding vectors
WO2011146204A3 (en) Method and apparatus for response scheduling in a downlink multiple-user multiple input multiple output network
WO2010013919A3 (en) Method for transmitting data in multiple antenna system
JP2014531813A5 (en)
WO2012021031A3 (en) Methods and apparatus for uplink control transmit diversity
MY154092A (en) Feedback method for performing a feedback by using a codebook in mimo system
US8964869B2 (en) Pre-coding method and apparatus
WO2010120106A3 (en) Multi-user mimo transmissions in wireless communication systems
JP2011050074A5 (en)
MX2015016226A (en) Method, user equipment and base station for transmitting four-antenna pre-coding matrix.
TW200746681A (en) Feedback of channel state information for MIMO and subband scheduling in a wireless communication system
WO2011014583A3 (en) Adaptive transmissions in coordinated multiple point communications
WO2010056008A3 (en) Signal transmission method and signal receiving method in a multi-input multi-output system
MX351964B (en) Method for reporting channel state information, user equipment and base station.
EP2188913A4 (en) A method for transmitting/receiving multiple codeword in a multiple input multiple output communication system
EP2515451A4 (en) Data transmission method and system for cooperative multiple input multiple output beam-forming
WO2011087614A3 (en) Distortion-aware multiple input multiple output communications
GB2492564B (en) Improvements to MIMO communication networks
IN2013CN00812A (en)
MX365929B (en) Methods, network node and communication device for transmitting data.
CN104798318B (en) Use the precoding and scheduling of the cellular communication system of a large amount of antenna for base station

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20140122