GB2467145B - Wireless communications methods and apparatus - Google Patents
Wireless communications methods and apparatusInfo
- 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
Links
- 239000011159 matrix material Substances 0.000 abstract 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000007796 conventional method Methods 0.000 abstract 1
- 238000010606 normalization Methods 0.000 abstract 1
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.
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)
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 |
-
2009
- 2009-01-22 GB GB0901089A patent/GB2467145B/en not_active Expired - Fee Related
Patent Citations (3)
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)
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 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20140122 |