CN1249989C - Method and apparatus for reducing multipath distortion in television signal - Google Patents
Method and apparatus for reducing multipath distortion in television signal Download PDFInfo
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- CN1249989C CN1249989C CN 00812511 CN00812511A CN1249989C CN 1249989 C CN1249989 C CN 1249989C CN 00812511 CN00812511 CN 00812511 CN 00812511 A CN00812511 A CN 00812511A CN 1249989 C CN1249989 C CN 1249989C
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
- H01Q9/265—Open ring dipoles; Circular dipoles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
- H01Q21/205—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path providing an omnidirectional coverage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
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- 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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
- H04N5/211—Ghost signal cancellation
Abstract
A method and apparatus for reducing multipath distortion in a television signal inlcudes a plurality of antenna elements for receiving spatially unique replicas of a desired television signal. The plurality of spatially unique replicas of the television signal are coupled to an adaptive combiner for generating a spatially combined signal to be input to a television receiver.
Description
It is the priority of 60/152859 U.S. Provisional Patent Application that the application requires in the sequence number of on September 8th, 1999 application, and in this article with it as a reference.
The application relates generally to a kind of method and apparatus that is used for received television signal, especially relates to a kind of antenna system that is used for reducing adaptively the multipath distortion of the TV signal that has received.
Background of the present invention
For a long time, terrestrial television broadcast signal is all perplexed by multipath distortion.The TV signal of transmission is reflected by building or other large-sized objects, has caused and received the multiple signals of not expecting in receiver.The signal of these signals do not expected and transmission merges mutually and produced the signal that is commonly called " ghost image " on video screen.When receiving the received terrestrial digital broadcasting TV signal, high-definition TV signal (HDTV) for example, ghost image can stop the formation of image completely.The appearance of interfering nodes in the city because in the launching site caused the serious reduction of the amplitude of the TV signal that receives, so the problem that multipath distortion exists is particularly serious in urban environment.Usually visible small size antenna can be hidden in such node completely in urban environment, and the result is that TV signal integral body is lost.
The multipath distortion that is used for removing the TV signal of analog-and digital-television reception at present is based on the adaptive equalizer in the television receiver.But such technology just multipath distortion be not too in the serious environmental effectively.In serious multi-path environment, for example when multipath distortion had caused having occurred the field node in antenna when, present balancing technique can not be proofreaied and correct this distortion fully.
Therefore, need a kind of antenna system in this field, this system can reduce the multipath distortion in the TV signal before signal is sent to television receiver.
Summary of the invention
The shortcoming that is associated with prior art can overcome by a kind of method and apparatus that is used for reducing the multipath distortion of TV signal.Specifically, receive the unique copy in space of the TV signal of expectation by a plurality of antenna elements.The unique copy in this space is sent to an adaptive combiner, and has produced a signal that the space merges, and this signal is delivered in the television receiver.Adaptive combiner has formed the weighted sum of the unique copy in space, and it is added in the space zero point on the direction that multipath disturbs effectively.Weighted information is that the adaptation controller by the intelligence of having used the multipath processor in the middle of the equipment that is positioned at provides.Intelligence can occur by the output signal that comes from combiner or by the form of the desired value that the processing of input signal self is produced.
Brief description of drawings
Religious doctrine of the present invention will be understood in the detailed description with the accompanying drawing hereinafter easily, wherein
Accompanying drawing 1 shows the block diagram according to equipment of the present invention;
Accompanying drawing 2 shows the block diagram of an embodiment of adaptive combiner;
Accompanying drawing 3A shows the perspective view of four port loop aerials;
Accompanying drawing 3B shows the vertical view of four port loop aerials;
Accompanying drawing 3C shows the end view that feed port is detailed;
Accompanying drawing 3D shows the detailed vertical view of feed port;
Accompanying drawing 3E shows the detailed vertical view of the feed port with a transformer;
Accompanying drawing 4A schematically shows the basic and controlled radiation model of medium and low frequency of the present invention;
Accompanying drawing 4B schematically shows the basic and controlled radiation model of medium-high frequency of the present invention;
Accompanying drawing 5 schematically shows the project organization of cloverleaf antenna.
In order to help understanding, in the place that may use Reference numeral, same Reference numeral is represented element same in the accompanying drawing.
Describe in detail
Accompanying drawing 1 has shown the block diagram of the equipment 100 of the multipath distortion that is used for reducing TV signal.Equipment 100 comprises a plurality of antenna elements 106 (for example, illustrated 4), an adaptive combiner 102, and a television receiver 104.Antenna element 106 receive one with a plurality of channels in a frequency band the terrestrial broadcast television channel corresponding RF signals of the expectation selected.With the broadcasting channel corresponding RF signals be analog-and digital-TV signal.The signal that can comprise a traditional national television standards committee (NTSC) modulation in U.S.'s analog signal.Digital television signal can comprise the vestigial sideband modulation signal that meets advanced television system committee (ATSC) standard A/53, for example a high-definition TV signal (HDTV).System described herein is by doing suitably to change to be configured to move other form for example European form to the importation of system.
Each antenna element 106 receives the unique copy (that is copy with TV signal of unique amplitude relevant with incident angle and phase place) in space of an expectation TV signal.The unique copy in each space is sent to adaptive combiner 102 and is used for spatial manipulation.The weighted sum of the copy that space of adaptive combiner 102 generations is unique, this weighted sum is placed on the space on the direction of multipath interference effectively zero point.The spatial manipulation of adaptive combiner 102 is adaptivitys, shows that (1) weighted information is to show that by use the desired value (FoM) of the detected value of equipment 100 working conditions produces, and perhaps (2) weighting is by the direct processing decision of input signal.The output of adaptive combiner 102 is sent to the demonstration that television receiver 104 is used for rectification and TV signal.
Accompanying drawing 2 has shown the block diagram of an embodiment of adaptive combiner 102.Adaptive combiner 102 comprises 216, one adaptation controllers 210 of 208, one multipath processors of 202, one adders of a plurality of tuner modules and a local oscillator (LO) 212.In a plurality of tuner modules 202 each all comprises a tuner 204 and a weighter 206.In a plurality of antenna elements 106 each all with a plurality of tuner modules 202 in each be coupled respectively.Especially, for tuner module 202
1, antenna element 106
1The unique copy in space of the expectation TV signal that produces is sent to tuner 204
1Tuner 204
1Export one with the expectation the corresponding intermediate frequency of TV signal (IF) signal.The TV signal of expectation is by producing a L0212 decision with L0 signal of suitable frequency.The medium-frequency IF signal that produces is by weighter 206
1Weighting also is sent to adder 208.The signal that it should be noted that the tuner output may be digital (use digital quantizer 205
1), therefore adapt to and handle and can carry out in the mode of mathematics.
In a plurality of tuner modules 202 each all according to above-mentioned description operation, has produced the unique copy in space of the expectation TV signal of a plurality of weightings, and has been sent to adder 208.Adder 208 merges a plurality of weighting copies and has produced a TV signal that the space merges.The TV signal that the space merges is coupled to the demonstration that is used for rectification and TV information in the middle of the television receiver 104, as shown in Figure 1.Selected consistent from the form of the TV signal of combiner output with receiving equipment.For example, signal can be converted into frequency and the modulation identical with the original search of TV.Perhaps for the television receiver of corresponding configuration, signal can be kept intact.
When adder 208 had merged two copies, the multipath composition had just been removed from the TV signal of expectation.In this method, adaptation controller 210 utilizes and comes from antenna element 106
3With 106
4The unique copy in space can remove two or more multipath composition (being 3 in the present embodiment).In general, equipment 100 can be removed the multipath composition (number that is the degree of freedom subtracts 1) of few one of the number of ratio antenna element 106.More the multipath composition of more number can utilize the LMS least mean square of whole multipath energy to come addressing in certain compromise mode.Those skilled in the art can easily design other optimum weighting scheme.
In addition, the operation at the output of combiner can be used to derive a desired value.In this case, adaptive processing will by the gradient search type rule known in this area progressively towards best solution.
Accompanying drawing 3A has shown the perspective view according to schematic antenna 300 of the present invention.Antenna 300 is multiport loop aerials, and it is particularly suited for paying close attention to multipath distortion people and uses above in the urban environment of signal strength signal intensity.In the middle of an embodiment, antenna 300 is that one four port loop aerial comprises a ring 302, and it is by four plane strip conductor 302A, 302B, 302C, 302D constitutes, and have four feed port 306, and four are connected to the feed lines 304 of ring on 302 by mechanical connector 308.Ring 302 have the cross section of a circle and feed port 306 with the arranged spaced of 90 degree on the girth of ring 302.Each bar feed lines 304 all mechanically is connected on each centre position to feed port 306 of ring 302.Feed lines 304 radial stretching, extensions inwards, and fully be stretched over 302 the center of encircling.At the center of ring 302, feed lines 304 is crooked 90 degree at point 310 places, and to extending away from the direction of encircling 302.The structure of antenna 300 provides a kind of geometry easily that is used to support shellfish type structure, makes this design to use on the machine top.
Accompanying drawing 3B shows the vertical view of antenna 300.Each bar feed lines 306 is crooked 90 degree (at point 310) after mechanical connector 308, and extend along the girth of ring 302.The coaxial shielding of each feed lines 306 ends at a side of each feed port 306, and coaxial center conductors strides across feed port 306 and connected symmetrical how much a virtual coaxial configuration 312 at opposite side.Accompanying drawing 3C shows the end view of structure of feed port 306 and the vertical view that accompanying drawing 3D shows the structure of feed port 306.In illustrated embodiment, ring 302 comprises a conductive layer 302A and a 302B on the outer surface that is positioned at substrate 302S.At each feed port 306 bus 302A of place, 302B, 302C, 302D do very narrowly and are in ring 302 bus 302A in each feed port 306,302B, and 302C forms a gap 314 (no conductor appearance) between the 302D.Feed lines 304 is coaxial cables, and the screen of ground connection is mechanically connected on the point of ring 302 conductive layer 302A in feed lines 304.The narrow of ring has reduced the stray reactance of those points, and the wide part of ring connects punishment leakage of electricity stream from coaxial cable, thereby reduces the coupling to feed lines 304.The width that increases also is used for reducing the intrinsic reactance of bar self, has therefore stablized input resistance with regard to frequency.In order to realize that this effect needs two centimetres width at least.Also can use the conductor of another kind of circular cross section, for example electric wire or pipe, for the steady resistance of realizing expecting, it will have at least one centimetre outer dia.As mentioned above, in each feed point 306, the center conductor 318 of coaxial cable 304 on gap 314, and by parasitic virtual 312 in the gap 314 a relative side 320 ground connection.Coaxial cable 304 and virtual coaxial configuration 312 have formed an autobalance transducer.
Thereby around each bar feed lines 304, can optionally place the parasitic radiation that some ferrite beans or sleeve pipe 316 reductions flow directly into the electric current of coaxial cable and reduced coaxial cable.
Shown in Fig. 3 E, impedance matching transformer 322 can be placed on feed point 306, perhaps on other aspect of circuit, is used to improve the coupling with tuner.Specifically, matching transformer 322 has the input terminal 324 on coax cable center conductor of being connected to 318 and the bus 302A, and has the outlet terminal 326 that is connected on parasitic coaxial configuration 312 and the bus 302B.
In another alternate embodiment of the present invention, transformer 322 is inserted on the mechanical connection point.Huan coaxial earthed surface is just substituted by the lead that the mode with the standard two wire transmission line connects conductive surface like this, and wherein the strip conductor surface is positioned on the symmetrical plane of such line.
The another kind that is used for antenna substitutes feed structure and comprises 300 Ω two-wire lines that directly link to each other with the central port.Two-wire will link to each other with online balanced to unbalanced transformer at the center of ring.Traditional shellfish not comes antenna just can constitute by this way, therefore when rotating shellfish when not coming antenna to make its direct directional signal source, the single feed lines of antenna with its terminal positioning in the launching site.Like this, the electric current of inflow feed lines itself will seldom even not have.
In another alternate embodiment of feed structure, transformer 322 can be positioned at away from feed port 306 on line position.Like this, each coaxial cable 304 all will end at the position of transformer 322, for example at bending point 310.Each transformer all will be loaded in the frame of a shielding.The coaxial cable of high impedance (for example 300 Ω) will be used to from the transformer to the feed point 306 transmission line.
The antenna structure of in accompanying drawing 3, describing can be used as shown in attached Fig. 1 and 2 with a plurality of antenna elements 106 of describing.Those skilled in the art can easily design the alternate device of many antenna elements and/or multiport antenna.Multiport loop aerial described herein is particularly useful for high-gain and is regarded as not as in the important urban environment of the control of multipath distortion.Special in the element arrays that reaches high-gain, for example Yagi-Uda or log-periodic element need can be used to the place of high-gain.
Accompanying drawing 4A has described low-frequency radiation diagram of acquisition in equipment 100 of the present invention.The direction of the TV signal of expectation is that the direction of 0 degree and multipath composition is 90 degree, 180 degree and 270 degree.In the present embodiment, equipment 100 has formed the zero point of square figure and has kept gain in the sense of expecting at the incident angle of multipath.
Accompanying drawing 4B has described the high frequency radiation side figure of acquisition in equipment 100 of the present invention.Here the direction of Qi Wang TV signal still is 0 degree and the direction of multipath composition is 135 degree now, and 180 degree and 225 are spent.Equipment 100 has formed the zero point of square figure at the incident angle of multipath, and has kept gain in the direction of the signal of expecting.For higher frequency, the main lobe of square figure more has directivity than low frequency.
Accompanying drawing 5 has been described another alternate embodiment antenna 500.Antenna 500 is cloverleaf antennas, comprises a ring fo2, has four antenna 502A towards the Vivaldi of orthogonal direction V-type opening, 502B, 502C, and 502D.Ring 502 at the VHF wave band, not comes antenna as improved shellfish, and Vivaldi element 502A as an overall work, and 502B, 502C, 502D provide the orientation side of UHF wave band to scheme.Element can have one along the gradually wide conductor of opening in order on the adjacent surface, the effective aperture of supporting known current direction and standard Vivaldi antenna.
Similar to the embodiment of previous antenna, this alternate embodiment can be lead, pipe, printed circuit board trace, paillon foil, thin metal and similar form.Four antenna element equipment allow to select a specific antenna pattern.This pattern is by selecting a specific antenna port 504A, 504B, and 504C, 504D obtains.Each port provides one to have the independently received signal of amplitude and phase property.It is possible that the antenna structure that makes other by many antenna ports and merging and phase network are coupled points to intermediate angle.
For the reception of VHF signal, four Vivaldi element 502A in ring structure, 502B, 502C, 502D can be separated from one another obsolete the time.Such separation provides improved UHF side figure characteristic.This separation can be relayed by using machinery, the PIN diode conversion, and perhaps the frequency selective network network between Vivadlj antenna element edge (for example in position 506) provides.
Although illustrate and describe in detail the various embodiment that adopted religious doctrine of the present invention here, those skilled in the art can easily design the embodiment of other distortion of still adopting these religious doctrines.
Claims (8)
1. equipment that is used for reducing the multipath distortion of TV signal comprises:
A plurality of antenna elements are used for received television signal, and wherein each described a plurality of antenna element receives the unique signal in each a plurality of space respectively, and the unique signal in each described a plurality of space all is the different copy of TV signal;
An adaptive combiner, be used for producing the signal that a space merges by the unique signal in each described space being carried out dynamic weighting, wherein said adaptive combiner comprises a plurality of signal processors, each described signal processor all is coupled to one of a plurality of antenna elements, an adder that is coupled to described a plurality of signal processors, a multipath processor that is coupled to described adder and described a plurality of signal processors; And
An output of being coupled to described adaptive combiner is used to send the signal that described space merges.
2. equipment as claimed in claim 1, wherein said a plurality of antenna element comprises a loop aerial with a plurality of feed port, can receive each unique signal in described a plurality of spaces on every side thereby each described a plurality of feed port all is positioned at the girth of described loop aerial.
3. equipment as claimed in claim 1, wherein said adaptive combiner comprises:
A plurality of tuner modules, each described tuner module all have a tuner and a weighter is used for the signal selection one unique from a plurality of spaces and produces the unique signal in space of weighting;
An adder is coupled with the described weighter of each described a plurality of tuner module, is used to merge the unique signal in the space of each weighting to produce described space combined signal;
A multipath processor is coupled with described adder, is used to produce a desired value; And
An adaptation controller is coupled with the described weighter of described multipath processor and each described a plurality of tuner module, and wherein said adaptation controller as input, uses adaptive algorithm to control each weighted value described desired value.
4. equipment as claimed in claim 3, wherein said adaptive algorithm comprise a cross correlation algorithm.
5. method that is used to reduce the multipath distortion of TV signal comprises:
Receive the unique signal in a plurality of spaces, the unique signal in each described space all is the different copy of TV signal;
The unique signal in each described space of characteristic dynamic weighting by the signal that merges according to described space produces the signal that a space merges thereby merge the unique signal in described a plurality of space adaptively; And
Export the signal that described space merges.
6. method as claimed in claim 5, wherein said combining step comprises:
Use weighting that each of the unique signal in a plurality of spaces is weighted, produce the unique signal in space of a plurality of weightings;
The signal plus that the space of described a plurality of weightings is unique is to produce the signal that described space merges;
Handle the signal that described space merges, to obtain desired value; And
By control the value of described weighting as the adaptive algorithm of input with described desired value.
7. method as claimed in claim 6, wherein for the signal that makes expectation is dominant than multipath composition, described adaptation controller is according to its indivedual style characteristics, and the service index value is selected a signal from the signal of described a plurality of receptions.
8. method as claimed in claim 6, wherein said adaptation controller use a kind of central manual user of memory that is stored in to select.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15285999P | 1999-09-08 | 1999-09-08 | |
| US60/152,859 | 1999-09-08 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510097624 Division CN1734837A (en) | 1999-09-08 | 2000-09-08 | Method and apparatus for reducing multipath distortion in a television signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1399843A CN1399843A (en) | 2003-02-26 |
| CN1249989C true CN1249989C (en) | 2006-04-05 |
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|---|---|---|---|
| CN 200510097624 Pending CN1734837A (en) | 1999-09-08 | 2000-09-08 | Method and apparatus for reducing multipath distortion in a television signal |
| CN 00812511 Expired - Lifetime CN1249989C (en) | 1999-09-08 | 2000-09-08 | Method and apparatus for reducing multipath distortion in television signal |
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| CN 200510097624 Pending CN1734837A (en) | 1999-09-08 | 2000-09-08 | Method and apparatus for reducing multipath distortion in a television signal |
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| EP (1) | EP1219109A2 (en) |
| JP (1) | JP2003513486A (en) |
| KR (2) | KR100742172B1 (en) |
| CN (2) | CN1734837A (en) |
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| DE (1) | DE60043312D1 (en) |
| MX (1) | MXPA02002405A (en) |
| WO (1) | WO2001019075A2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7034893B2 (en) * | 2001-03-30 | 2006-04-25 | Broadcom Corporation | Method and apparatus for reception of terrestrial digital television signals |
| DE10224536B4 (en) * | 2002-05-31 | 2009-04-23 | Harman Becker Automotive Systems (Xsys Division) Gmbh | Method and circuit arrangement for multipath reception |
| KR100482286B1 (en) | 2002-09-27 | 2005-04-13 | 한국전자통신연구원 | Digital broadcasting service receiver for improving reception ability by switched beamforming |
| KR100500661B1 (en) | 2003-06-14 | 2005-07-12 | 한국전자통신연구원 | Apparatus and method for selecting optimal beam for digital tv receiver |
| US7026989B1 (en) * | 2004-01-23 | 2006-04-11 | Itt Manufacturing Enterprises, Inc. | Methods and apparatus for shaping antenna beam patterns of phased array antennas |
| KR100583240B1 (en) * | 2004-11-26 | 2006-05-25 | 한국전자통신연구원 | Optimal beam selection method for improving digital broadcasting reception performance, and digital broadcasting receiving apparatus |
| US7714780B2 (en) * | 2006-03-10 | 2010-05-11 | Broadcom Corporation | Beamforming RF circuit and applications thereof |
| CN104900990B (en) * | 2015-06-09 | 2019-04-23 | 联想(北京)有限公司 | Antenna and electronic equipment including the antenna |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5931241B2 (en) * | 1975-11-12 | 1984-08-01 | 松下電器産業株式会社 | ghost |
| US4121219A (en) * | 1976-04-12 | 1978-10-17 | Connor Gerald O | Dipole resonent loop antenna |
| JPS5585106A (en) * | 1978-12-21 | 1980-06-26 | Sony Corp | Antenna unit |
| CA1128654A (en) * | 1978-12-21 | 1982-07-27 | Masahiro Tada | Antenna system with variable directivity |
| US4397041A (en) * | 1980-03-03 | 1983-08-02 | Pioneer Electronic Corporation | Complex antenna system and FM/AM receiver |
| JPS5913442A (en) * | 1982-07-14 | 1984-01-24 | Nec Corp | Minimum signal dispersion type space diversity device |
| JPS5913441A (en) * | 1982-07-14 | 1984-01-24 | Nec Corp | Interference wave erasing type space diversity device |
| DE3427629A1 (en) * | 1984-07-26 | 1986-01-30 | Siemens AG, 1000 Berlin und 8000 München | Ring antenna using printed-circuit technology |
| JPH069342B2 (en) * | 1985-09-24 | 1994-02-02 | 日産自動車株式会社 | Antenna device |
| JPS62100034A (en) * | 1985-10-26 | 1987-05-09 | Toshiba Corp | Detecting circuit for interference frequency in interference wave eliminator |
| GB2257605A (en) * | 1991-07-12 | 1993-01-13 | Paul Victor Brennan | Diversity antenna system |
| JPH0879570A (en) * | 1994-09-09 | 1996-03-22 | Hitachi Ltd | Television receiver |
| US6069912A (en) * | 1995-11-29 | 2000-05-30 | Ntt Mobile Communications Network, Inc. | Diversity receiver and its control method |
-
2000
- 2000-09-08 KR KR1020057016774A patent/KR100742172B1/en active IP Right Grant
- 2000-09-08 EP EP00961698A patent/EP1219109A2/en not_active Ceased
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- 2000-09-08 JP JP2001522761A patent/JP2003513486A/en active Pending
- 2000-09-08 WO PCT/US2000/024708 patent/WO2001019075A2/en not_active Application Discontinuation
- 2000-09-08 DE DE60043312T patent/DE60043312D1/en not_active Expired - Lifetime
- 2000-09-08 AU AU73616/00A patent/AU7361600A/en not_active Abandoned
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| WO2001019075A3 (en) | 2001-09-20 |
| EP1219109A2 (en) | 2002-07-03 |
| AU7361600A (en) | 2001-04-10 |
| CN1399843A (en) | 2003-02-26 |
| DE60043312D1 (en) | 2009-12-24 |
| KR20020033788A (en) | 2002-05-07 |
| KR20050095903A (en) | 2005-10-04 |
| MXPA02002405A (en) | 2002-08-28 |
| CN1734837A (en) | 2006-02-15 |
| KR100742172B1 (en) | 2007-07-25 |
| WO2001019075A2 (en) | 2001-03-15 |
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