EP0817308A2 - Method for the automatic selection of one beam among those formed by a multibeam antenna, in particular for radiomobile systems - Google Patents
Method for the automatic selection of one beam among those formed by a multibeam antenna, in particular for radiomobile systems Download PDFInfo
- Publication number
- EP0817308A2 EP0817308A2 EP97111319A EP97111319A EP0817308A2 EP 0817308 A2 EP0817308 A2 EP 0817308A2 EP 97111319 A EP97111319 A EP 97111319A EP 97111319 A EP97111319 A EP 97111319A EP 0817308 A2 EP0817308 A2 EP 0817308A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- selection
- radiomobile
- array
- estimation
- received signals
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000012549 training Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000001413 cellular effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 238000002592 echocardiography Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007476 Maximum Likelihood Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
Landscapes
- Radio Transmission System (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
- figure 1 shows a schematic view of a GSM signal transceiver provided with an "intelligent" antenna;
- figure 2 shows a flow scheme of operating phases of the receiver of fig. 1 according to the method according to the present invention;
- figure 3 shows a schematic representation of position, length and period of a training sequence of a normal burst received by the receiver of figure 1;
- figure 4 shows an autocorrelation diagram related to the signal of figure 3.
an and bn are supposed to be two possible sequences of transmitted symbols, (t) and (t) the complex envelopes of the corresponding received signals, and da-b the distance between these signals. All these elements are defined in the following way: where h(t) is the complex envelopes of the impulsive response of the transmission system and N is the number of transmitted symbols.
Claims (3)
- Method for the selection of a beam among those formed by a multibeam antenna, in particular radiomobile systems comprising a receiver set of radio frequency signals provided with an array (10) of radiant and/or receiving elements, a beam former (5) connected downstream of the array and a best beam selection device (9) connected to the beam former (5), characterised in that in said selection device (9) of the best beam that beam will be chosen which presents the minimum value of an estimation of the decoding error probability of the received signals.
- Method according to claim 2, characterised in that this minimum estimation value of the decoding error probability of the received signals is proportional to a maximum value of a parameter (dmin) defined as the minimum distance between the received signals related to all combinations of two different sequences (an, bn) of transmitted symbols.
- Method according to claim 2, characterised in that operations carried out by the selection device (9) for each beam are:.. an an estimation of the impulsive response h(t) of transmission system;.. a calculation of the autocorrelation of said impulsive response according to the following formula:
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI961369 | 1996-07-04 | ||
IT96MI001369A IT1285217B1 (en) | 1996-07-04 | 1996-07-04 | METHOD FOR THE AUTOMATIC SELECTION OF A BEAM AMONG THOSE FORMED BY A MULTI BEAM ANTENNA, PARTICULARLY FOR MOBILE RADIO SYSTEMS |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0817308A2 true EP0817308A2 (en) | 1998-01-07 |
EP0817308A3 EP0817308A3 (en) | 1998-04-08 |
EP0817308B1 EP0817308B1 (en) | 2002-11-27 |
Family
ID=11374530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97111319A Expired - Lifetime EP0817308B1 (en) | 1996-07-04 | 1997-07-04 | Method for the automatic selection of one beam among those formed by a multibeam antenna, in particular for radiomobile systems |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0817308B1 (en) |
DE (1) | DE69717354T2 (en) |
IT (1) | IT1285217B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001013463A1 (en) * | 1999-08-16 | 2001-02-22 | Telefonaktiebolaget Lm Ericsson (Publ) | Method of and apparatus for beam reduction and combining in a radio communications system |
WO2001091325A1 (en) * | 2000-05-25 | 2001-11-29 | Siemens Aktiengesellschaft | Method for controlling the formation of a downlink beam |
WO2009080101A1 (en) * | 2007-12-20 | 2009-07-02 | Telefonaktiebolaget Lm Ericsson (Publ) | An improved antenna arrangement in an electronic device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5303240A (en) * | 1991-07-08 | 1994-04-12 | Motorola, Inc. | Telecommunications system using directional antennas |
WO1996023329A1 (en) * | 1995-01-27 | 1996-08-01 | Hazeltine Corporation | High gain antenna systems for cellular use |
US5590399A (en) * | 1995-02-23 | 1996-12-31 | Nextel Communications | Up-link channel assignment scheme for cellular mobile communications systems employing multi-beam antennas with beam selection |
WO1997044978A1 (en) * | 1996-05-22 | 1997-11-27 | Nokia Telecommunications Oy | Method and system for selecting an antenna beam of a base station of a radio system |
-
1996
- 1996-07-04 IT IT96MI001369A patent/IT1285217B1/en active IP Right Grant
-
1997
- 1997-07-04 EP EP97111319A patent/EP0817308B1/en not_active Expired - Lifetime
- 1997-07-04 DE DE69717354T patent/DE69717354T2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5303240A (en) * | 1991-07-08 | 1994-04-12 | Motorola, Inc. | Telecommunications system using directional antennas |
WO1996023329A1 (en) * | 1995-01-27 | 1996-08-01 | Hazeltine Corporation | High gain antenna systems for cellular use |
US5590399A (en) * | 1995-02-23 | 1996-12-31 | Nextel Communications | Up-link channel assignment scheme for cellular mobile communications systems employing multi-beam antennas with beam selection |
WO1997044978A1 (en) * | 1996-05-22 | 1997-11-27 | Nokia Telecommunications Oy | Method and system for selecting an antenna beam of a base station of a radio system |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001013463A1 (en) * | 1999-08-16 | 2001-02-22 | Telefonaktiebolaget Lm Ericsson (Publ) | Method of and apparatus for beam reduction and combining in a radio communications system |
US6470192B1 (en) | 1999-08-16 | 2002-10-22 | Telefonaktiebolaget Lm Ericcson (Publ) | Method of an apparatus for beam reduction and combining in a radio communications system |
WO2001091325A1 (en) * | 2000-05-25 | 2001-11-29 | Siemens Aktiengesellschaft | Method for controlling the formation of a downlink beam |
US7039368B2 (en) | 2000-05-25 | 2006-05-02 | Siemens Aktiengesellschaft | Method for controlling the formation of a downlink beam |
KR100767129B1 (en) * | 2000-05-25 | 2007-10-15 | 지멘스 악티엔게젤샤프트 | Method for controlling the formation of a downlink beam |
WO2009080101A1 (en) * | 2007-12-20 | 2009-07-02 | Telefonaktiebolaget Lm Ericsson (Publ) | An improved antenna arrangement in an electronic device |
Also Published As
Publication number | Publication date |
---|---|
ITMI961369A0 (en) | 1996-07-04 |
EP0817308A3 (en) | 1998-04-08 |
IT1285217B1 (en) | 1998-06-03 |
EP0817308B1 (en) | 2002-11-27 |
DE69717354T2 (en) | 2003-09-18 |
ITMI961369A1 (en) | 1998-01-04 |
DE69717354D1 (en) | 2003-01-09 |
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