WO2010095356A1 - Television receiver - Google Patents

Television receiver Download PDF

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Publication number
WO2010095356A1
WO2010095356A1 PCT/JP2010/000354 JP2010000354W WO2010095356A1 WO 2010095356 A1 WO2010095356 A1 WO 2010095356A1 JP 2010000354 W JP2010000354 W JP 2010000354W WO 2010095356 A1 WO2010095356 A1 WO 2010095356A1
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WO
WIPO (PCT)
Prior art keywords
antenna
television receiver
antennas
horizontally polarized
diagram showing
Prior art date
Application number
PCT/JP2010/000354
Other languages
French (fr)
Japanese (ja)
Inventor
高井均
長谷和俊
静谷治
Original Assignee
パナソニック株式会社
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Filing date
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Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2010095356A1 publication Critical patent/WO2010095356A1/en

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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
    • H04B7/10—Polarisation diversity; Directional diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/41422—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance located in transportation means, e.g. personal vehicle
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof

Definitions

  • the present invention relates to a television receiver that receives a television broadcast in an indoor or indoor diffuse reflection environment.
  • indoor or indoor television receivers that are not restricted by the wall antenna terminal receive broadcast waves with indoor antennas, so-called indoor antennas, and connect the indoor antennas to the television receivers with antenna wires and view It is common to do.
  • FIG. 22A shows a first example of a conventional antenna.
  • the antenna 600 has an 8-shaped antenna element 610 inside, and a reflector 620 on the back surface of the antenna element 610.
  • an antenna that is small but has a directivity narrowed in a single direction to obtain an antenna gain (see Patent Document 1).
  • Patent Document 1 a mode is also disclosed in which the antenna 600 is installed indoors, the antenna 600 is connected to a television receiver with a cable, and viewing is performed indoors.
  • FIG. 22B in indoor 670 or indoor reception, the electric field strength is reduced due to intrusion transmission loss of radio waves into the building, and good reception is difficult.
  • a second example of a conventional antenna has a structure 710 that looks like a paraboloid as shown in FIG. 23A. As shown in FIGS. 23B and 23C, a groove 720 is provided on the back surface of the structure 710 that looks like a paraboloid. Further, an antenna element 730 as shown in the front view of FIG. 23D and the side view of FIG. 23E is housed. With such a configuration, an indoor antenna has been disclosed in which a depression of a side directivity characteristic is reduced and a directivity characteristic is weakened on the contrary, as compared with an 8-shaped directivity characteristic of a normal dipole (see Patent Document 2).
  • Patent Document 2 also discloses the idea of switching the above-described modified dipole and rod antenna 740 with a switch 750 and using the better reception state at the place where the switch is placed.
  • FIG. 24A shows a third example of a conventional antenna.
  • the television receiver 800 is an integrated body of a television receiver body 830 including a display unit 810 and a keyboard 820.
  • an indoor antenna 821 is built in the keyboard 820.
  • the indoor antenna 821 controls the voltage applied to the varactor diodes loaded on the parasitic elements before and after the power supply element of the indoor antenna 821.
  • the direction of directivity can be appropriately controlled (see Patent Document 3).
  • Such a method can be integrated with the cable between the antenna and the television receiver omitted, so that it is preferable from the viewpoint of freestyle because of high mobility.
  • a dipole 910 deformed into a rectangular ring shape as shown in FIG. 25 and a monopole antenna 920 deformed into an L-shape are combined, and a better antenna is switched and selected.
  • Diversity antennas for outdoor and on-vehicle mobile environments have been proposed (see Patent Document 4).
  • the dipole 910 deformed into a rectangular ring shape can receive horizontal polarization and can obtain a substantially omnidirectional directional characteristic, unlike the figure 8 of a normal dipole, while receiving horizontal polarization.
  • the monopole antenna 920 transformed into an L-shape can receive not only the horizontal polarization component but also the vertical polarization component at the vertical rising portion.
  • Patent Document 2 or Patent Document 4 when the directivity is expanded by deforming the element, or both the vertically polarized wave and the horizontally polarized wave are added in addition to the deformation and inclination of the element. Can receive radio waves of various directions and polarizations.
  • the antenna gain in an arbitrary direction and an arbitrary polarization is reduced as a whole, the reception situation cannot be improved after all.
  • Patent Document 2 or Patent Document 4 even in a conventional configuration in which a better antenna is selected and switched among a plurality of antennas, in a semi-fixed use style, different fluctuations are generated unlike in the case of movement. The improvement effect as the diversity used cannot be expected. Therefore, when the arrival wave power is dispersed in various arrival directions and polarizations, the reception power of all the antennas cannot be effectively used after all. As a result, there is a problem that the reception situation is not improved so much.
  • JP 2008-118353 A Japanese Patent No. 2675973 Japanese Patent No. 3847301 Japanese Patent No. 3165465
  • a television receiver of the present invention is a television receiver that receives broadcast waves from a broadcasting station that transmits polarized waves in a predetermined direction in an indoor room, and includes a chassis body, two or more horizontally polarized antennas, One or more vertically polarized antennas, a synthesis unit, and a demodulation unit are provided. Two or more horizontally polarized antennas receive horizontally polarized waves attached to the chassis body. One or more vertically polarized antennas receive vertically polarized waves attached to the chassis body.
  • the synthesizer synthesizes three or more signals received by two or more horizontally polarized antennas and one or more vertically polarized antennas by adjusting the phase so that the carrier wave phases overlap and performing weighting.
  • the demodulation unit demodulates the signal synthesized by the synthesis unit.
  • the two or more horizontally polarized antennas are arranged so that the directional radiation patterns are complementary to each other.
  • the signal-to-noise ratio of the received signal is positively increased by combining and utilizing incoming waves from any direction on the horizontal plane for both horizontal and vertical polarization components. This enables better and more stable TV viewing.
  • FIG. 1A is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 1B is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 2A is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 2B is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 2C is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 1A is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 1B is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 2A is a diagram showing
  • FIG. 3 is a diagram showing a directional radiation pattern obtained by superimposing directional radiation patterns on the horizontal plane of each antenna of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 4 is a block diagram showing a circuit configuration of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 5 is a block diagram showing an internal configuration of the combining unit of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 6 is an internal configuration diagram of the combining unit of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 7 is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 8A is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 8B is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 8C is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 8D is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver in Embodiment 2 of the present invention.
  • FIG. 8B is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 8C is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 8D is a diagram showing a directional radiation pattern
  • FIG. 9 is a diagram showing a directional radiation pattern obtained by superimposing directional radiation patterns on the horizontal plane of each antenna of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 10 is a block diagram showing a circuit configuration of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 11 is a conceptual diagram showing an antenna configuration of another example of a television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 12 is a conceptual diagram showing an antenna configuration of another example of the television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 13 is a conceptual diagram showing an antenna configuration of another example of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 10 is a block diagram showing a circuit configuration of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 11 is a conceptual diagram showing an antenna configuration of another example of a television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 12 is a conceptual diagram
  • FIG. 14 is a conceptual diagram showing an antenna configuration of another example of a television receiver according to Embodiment 2 of the present invention.
  • FIG. 15 is a conceptual diagram showing an antenna configuration of another example of the television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 16 is a conceptual diagram showing an antenna configuration of another example of the television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 17 is a conceptual diagram showing an antenna configuration of another example of the television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 18 is a conceptual diagram showing an antenna configuration of another example of a television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 19 is a conceptual diagram showing an antenna configuration of another example of the television receiver in Embodiment 2 of the present invention.
  • FIG. 19 is a conceptual diagram showing an antenna configuration of another example of the television receiver in Embodiment 2 of the present invention.
  • FIG. 20 is a conceptual diagram showing an antenna configuration of another example of a television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 21 is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 3 of the present invention.
  • FIG. 22A is a conceptual diagram showing a conventional first antenna configuration.
  • FIG. 22B is a conceptual diagram showing a first conventional antenna configuration.
  • FIG. 23A is a conceptual diagram showing a conventional second antenna configuration.
  • FIG. 23B is a conceptual diagram showing a conventional second antenna configuration.
  • FIG. 23C is a conceptual diagram showing a conventional second antenna configuration.
  • FIG. 23D is a conceptual diagram showing a conventional second antenna configuration.
  • FIG. 23E is a conceptual diagram showing a conventional second antenna configuration.
  • FIG. 24A is a conceptual diagram showing a conventional third antenna configuration.
  • FIG. 24B is a conceptual diagram showing a conventional third antenna configuration.
  • FIG. 25 is a conceptual diagram showing a conventional fourth antenna configuration.
  • FIG. 1A and 1B are conceptual diagrams showing an antenna configuration of television receiving apparatus 100 in the present embodiment.
  • FIG. 1A shows a projection view from the front of the television receiver 100.
  • FIG. 1B shows a projection view of the television receiver 100 from an oblique rear side.
  • the television receiver 100 includes a display unit 150, a support unit 103, a chassis main body 102, three antennas including a monopole antenna 191, a dipole antenna 192, and a sleeve antenna 193 as an antenna unit 190 attached to the chassis main body 102. It has.
  • the three antennas of the antenna unit 190 are arranged as follows. That is, the monopole antenna 191 is disposed perpendicular to the horizontal plane, the dipole antenna 192 is disposed parallel to the horizontal plane, the sleeve antenna 193 is parallel to the horizontal plane, and is disposed perpendicular to the dipole antenna 192. It has become.
  • the antenna unit 190 has an arrangement in which the elements of these three antennas are orthogonal to each other.
  • the sleeve antenna 193 is a kind of dipole antenna composed of a ⁇ / 4 long central conductor of a feeding coaxial line and a ⁇ / 4 long coaxial outer conductor whose tip is open.
  • FIG. 2A is a diagram showing a directional radiation pattern of a vertically polarized component in the horizontal plane of the monopole antenna 191.
  • FIG. 2B is a diagram showing a directional radiation pattern of a horizontally polarized wave component on the horizontal plane of the dipole antenna 192.
  • FIG. 2C is a diagram showing a directional radiation pattern of a horizontally polarized wave component on the horizontal plane of the sleeve antenna 193.
  • FIG. 3 is a diagram showing a directional radiation pattern in which the directional radiation patterns on the horizontal plane of each antenna shown in FIGS. 2A, 2B, and 2C are superimposed.
  • the vertical polarization component as indicated by the dotted line, the signal from any direction can be received by the circular radiation pattern of the monopole antenna 191.
  • the horizontal polarization component as shown by the solid line, the 8-shaped radiation patterns of the dipole antenna 192 and the sleeve antenna 193 overlap to receive signals from any direction.
  • two dipole antennas 192 and sleeve antennas 193 are given as examples of horizontally polarized antennas
  • the present invention can be applied to two or more antennas.
  • one monopole antenna 191 is taken as an example, but the present invention can be applied to two or more antennas.
  • two or more vertically polarized antennas are arranged so that their directional radiation patterns are complementary to each other.
  • a larger number is preferable because the directivity pattern can be averaged in all directions.
  • the larger the number of antennas the more complicated the circuit configuration downstream of the antennas. Therefore, an appropriate number of antennas suitable for the purpose should be selected.
  • the television receiver 100 includes two or more horizontally polarized antennas that are attached to the chassis main body 102 and receive a horizontally polarized wave, that is, a dipole antenna 192 and a sleeve antenna 193. And one or more vertically polarized antennas that are attached to the chassis main body 102 and receive a vertically polarized wave, that is, a monopole antenna 191.
  • the horizontal polarization antenna is composed of two dipole antennas 192 and a sleeve antenna 193, and the vertical polarization antenna is composed of one monopole antenna 191. All of the vertically polarized antennas are orthogonal to each other.
  • FIG. 4 is a block diagram showing a circuit configuration of television receiver 100 in the present embodiment.
  • FIG. 5 is a block diagram showing an internal configuration of the synthesis unit 120 in FIG.
  • television receiver 100 includes low-noise amplifiers connected to monopole antenna 191, dipole antenna 192, and sleeve antenna 193 that are antennas of antenna unit 190. 111 to 113, a synthesis unit 120, a demodulation error correction unit 130, a video / audio decoding unit 140, a display unit 150, and a speaker unit 160.
  • the television receiver 100 amplifies the signals received by the monopole antenna 191, the dipole antenna 192, and the sleeve antenna 193 of the antenna unit 190 by the low-noise amplifiers 111 to 113 and synthesizes them by the synthesis unit 120. . Then, the television receiver 100 performs demodulation processing and error correction processing on the synthesized signal in the demodulation error correction section 130 and extracts it as a received information data sequence, and the video / audio decoding section 140 displays the video signal and audio signal as a display section 150. And output to the speaker unit 160.
  • the display unit 150 includes a display device such as a liquid crystal display or a plasma display and a driver circuit thereof, and draws and displays a received image from the received video signal.
  • the speaker unit 160 includes a speaker and a driving amplifier circuit thereof, and generates sound from the received audio signal.
  • the low noise amplifiers 111 to 113 are received by an amplifier having a low noise index immediately below the antenna in consideration of the low electric field strength environment of the broadcast radio waves received indoors or indoors and various noise radio waves mixed with the antenna integration. It is preferable to amplify radio waves in order to improve sensitivity. However, it may be omitted and the antenna and the combining unit 120 may be directly connected.
  • the combining unit 120 includes front end units 1211 to 1213, analog-digital (hereinafter abbreviated as “A / D”) conversion units 1221 to 1223, pilot extraction transmission path estimation units 1251 to 1253, phase It is composed of correction weighting units 1261 to 1263 and an addition / synthesis unit 127.
  • the synthesizing unit 120 shows an example of a configuration in the case of a single carrier system represented by the ATSC system which is a digital television broadcasting system such as the United States.
  • an 8-level residual sideband (VSB) amplitude modulation method is used as a modulation method in the case of the ATSC method.
  • the television signal modulated by this modulation method and received by each antenna of the antenna unit 190 is first converted to a low frequency band at the same time as the target signal is selected and amplified to an appropriate level by the front end units 1211-1213.
  • a / D converters 1221 to 1223 convert the digital signals.
  • the phase correction weighting units 1261 to 1263 adjust the phase so that the phases of the outputs overlap with each other using this signal as a pilot signal, and the addition / synthesis unit 127 Add and synthesize.
  • the signal-to-noise ratio of the carrier wave signal that is a pilot signal is also detected by the pilot extraction transmission path estimation units 1251 to 1253, and the phase correction weighting units 1261 to 1263 also perform weighting in proportion to the value. It is more preferable to perform the so-called maximum ratio combining, in which the addition combining unit 127 adds and combines.
  • the level of the carrier signal that is a pilot signal may be used instead of the signal-to-noise ratio, or the level of the total signal may be used instead.
  • the ATSC signal is a wideband signal
  • the multipath transmission line often involves linear distortion with a disturbed frequency characteristic. Therefore, it is desirable that the pilot extraction transmission path estimation units 1251 to 1253 perform the estimation of the transmission path characteristics by using signal characteristics such as a specific information pattern in the ATSC signal.
  • the phase correction weighting units 1261 to 1263 correct the multipath transmission line distortion by multiplying the reciprocal of the transmission line estimation result simultaneously with the above phase correction and weighting, and add and combine them by the adder / synthesizer 127. More preferably, maximum ratio synthesis is performed.
  • the synthesizing unit 120 can obtain a combined signal for demodulation with a positively increased signal-to-noise ratio by correcting and adjusting each input signal well and adding and synthesizing. it can.
  • television receiving apparatus 100 in the present embodiment performs at least three antennas having element arrangements orthogonal to each other, and appropriately weights the received signals from these antennas by matching the carrier wave phases with each other.
  • phase correction weighting units 1261 to 1263 it is possible to perform demodulation by using the signal synthesized by the addition synthesis unit 127 and synthesized as a received signal.
  • the three antennas described above receive one or more vertically polarized antennas attached to the chassis main body 102 for receiving vertical polarized waves, and the horizontal polarized waves attached to the chassis main body 102. And two or more horizontally polarized antennas whose maximum gain directions are orthogonal to each other.
  • the signal-to-noise ratio of the received signal can be positively increased by using and synthesizing incoming waves from any direction of vertical polarization, horizontal polarization, and horizontal plane. Therefore, in indoor or indoor reception, it is possible to obtain the maximum reception sensitivity at the place where it is placed and to perform better television viewing.
  • the composition unit 120 is configured in the case of a single carrier system typified by the ATSC system, which is a digital television broadcasting system such as the United States.
  • ATSC system which is a digital television broadcasting system such as the United States.
  • OFDM orthogonal frequency multiplexing
  • ISDB-T system and DVB-T system which are digital television broadcasting systems such as Japan and Europe, may be used.
  • combining section 120 includes front end sections 1211 to 1213, A / D conversion sections 1221 to 1223, guard interval (hereinafter abbreviated as “GI”) removal frequency control sections 1231 to 1233, Fast Fourier Transform (hereinafter abbreviated as “FFT”) units 1241 to 1243, pilot extraction transmission path estimation units 1251 to 1253, phase correction weighting units 1261 to 1263, and an adder / synthesizer 127.
  • This combining unit 120 is an example of a configuration in the case of an orthogonal frequency multiplexing (OFDM) system using a number of subcarriers typified by ISDB-T system and DVB-T system, which are digital television broadcasting systems such as Japan and Europe. Is shown.
  • OFDM orthogonal frequency multiplexing
  • the front end units 1211 to 1213 and the A / D conversion units 1221 to 1223 are the same as those described with reference to FIG.
  • Each received signal that has become a digital signal is first corrected by the GI removal frequency control units 1231-1233 using a guard interval signal or the like to correct a frequency shift, and an appropriate symbol timing is detected.
  • the signal information is arranged and adjusted and input to the FFT units 1241 to 1243.
  • the FFT units 1241 to 1243 decompose the received signals for each subcarrier and output them.
  • Pilot extraction transmission path estimators 1251 to 1253 extract pilot signals regularly inserted in advance on the transmission side in both the symbol direction and the subcarrier direction.
  • pilot extraction transmission path estimation sections 1251 to 1253 interpolate and extrapolate from these pilot signals to obtain the amplitude and phase of each subcarrier, and at the same time, transmission path characteristics subjected to linear distortion in the multipath transmission path.
  • Estimate Phase correction weighting sections 1261 to 1263 multiply multipath transmission line distortion by multiplying the reciprocal of the transmission path estimation result (frequency equalization), and adjust the phase so that the phases overlap between the corresponding subcarriers of each system.
  • the adder / synthesizer 127 adds and synthesizes each subcarrier.
  • the phase correction weighting units 1261 to 1263 also perform weighting, and the summing unit 127 adds and synthesizes so-called maximum ratio combining. Is more preferable.
  • the level of each subcarrier may be used instead of the signal-to-noise ratio.
  • FIG. 7 is a conceptual diagram showing an antenna configuration of television receiver 320 according to Embodiment 2 of the present invention.
  • FIG. 8A, FIG. 8B, FIG. 8C, and FIG. 8D are figures which show the directional radiation pattern in the horizontal surface of each antenna.
  • FIG. 9 is a diagram showing a directional radiation pattern in a horizontal plane superimposed on the horizontal plane of each antenna.
  • FIG. 10 is a block diagram showing a circuit configuration.
  • the antenna configuration of FIG. 1A in Embodiment 1 is different from the antenna configuration of the television receiver 320 in this embodiment in that it can be moved instead of one sleeve antenna 193. That is, the monopole antennas 1911 and 1912 are arranged. That is, the antenna unit 1910 attached to the chassis main body 102 includes four antennas, a monopole antenna 191, a dipole antenna 192, and two monopole antennas 1911 and 1912. Note that the dipole antenna 192 may also be movable. Others are denoted by the same reference numerals as those in the first embodiment, and are the same as those described with reference to FIG.
  • FIG. 8A is a diagram showing a directional radiation pattern of a vertically polarized component in the horizontal plane of the monopole antenna 191.
  • FIG. 8B is a diagram illustrating a directional radiation pattern of a horizontally polarized wave component on the horizontal plane of the dipole antenna 192.
  • FIG. 8C is a diagram showing a directional radiation pattern of a horizontal polarization component in the horizontal plane of the monopole antenna 1911.
  • FIG. 8D is a diagram showing a directional radiation pattern of a horizontal polarization component in the horizontal plane of the monopole antenna 1912.
  • the directional radiation pattern rotates to the left and right as shown in FIGS. 8C and 8D.
  • the monopole antennas 1911 and 1912 are swung up and down, the vertical polarization component can be received by these antennas while the directional radiation pattern on the horizontal plane is substantially unchanged.
  • the dipole antenna 192 is turned to the left and right while keeping parallel to the horizontal plane, the directional radiation pattern rotates to the left and right as shown in FIG. 8B.
  • the element of the dipole antenna 192 is swung upward or downward, a vertical polarization component can be received by these antennas with the directional radiation pattern on the horizontal plane substantially unchanged.
  • the television receiver 320 of this embodiment is characterized in that at least one of the two or more horizontally polarized antennas can move the direction.
  • FIG. 9 is a diagram showing a directional radiation pattern in the horizontal plane obtained by superimposing the directional radiation patterns in the horizontal plane of each antenna shown in FIGS. 8A, 8B, 8C, and 8D.
  • the two monopole antennas 1911 and 1912 are preferably arranged in parallel to the horizontal plane while maintaining orthogonality with the monopole antenna 191 arranged vertically.
  • Two dipole antennas 192 may be arranged while maintaining orthogonality, but the monopole antennas 1911 and 1912 are arranged in a horizontal plane with respect to the dipole antenna 192 as indicated by a solid line with respect to the horizontal polarization component. It is preferable to swing about 30 ° left and right in the orthogonal direction. As a result, in combination with the figure 8 radiation pattern of the dipole antenna 192, the signal from any direction can be efficiently received with respect to the horizontal polarization component more uniformly.
  • Some broadcast stations may transmit in vertically polarized waves.
  • the vertically polarized wave component in addition to the circular radiation pattern of the monopole antenna 191, as shown by the dotted line, this time, either one or both of the monopole antennas 1911 and 1912 are used. It is preferable to shake the dipole antenna 192 up and down while maintaining orthogonality. Further, the element of the dipole antenna 192 may be swung upward or downward. As a result, vertical polarization components can be received by these antennas, and more vertical polarization components can be received.
  • the chassis body 102 itself does not move, and the movable antenna, that is, the monopole antenna 1911 or the monopole antenna 1912 in the example of FIG.
  • the sharing of each antenna can be changed.
  • the monopole antennas 1911 and 1912 and the dipole antenna 192 are also used when the direct reception wave from the window or the like is significant as compared with the reflected scattered wave and the arrival direction of the radio wave is not universal and is slightly biased. Even if the television receiver 320 is placed in a place where it is difficult to receive in the place where it is difficult to receive, it is possible to move at least one of the directional radiation patterns intentionally. The advantage of being able to find out the reception status is born.
  • FIG. 10 is a block diagram showing a circuit configuration of the television receiver 320 according to Embodiment 2 of the present invention.
  • the internal configuration diagram of the combining unit 120 is exactly the same as the number of systems before the addition combining unit 127 of FIG. 5 or FIG.
  • the number of antennas that is, the number of systems can be increased arbitrarily, and the coverage of the polarization component and the directivity of each antenna constituting the antenna unit 190 has a reasonable overlap, but is universal. By sharing the distribution, better television viewing can be expected as the number increases.
  • the number of antennas is increased, and some antennas are movable in the horizontal or vertical direction according to the transmission wave of the horizontal polarization or the vertical polarization of the broadcasting station.
  • incoming waves from any direction of vertical polarization, horizontal polarization, and horizontal plane can be used and synthesized more efficiently. Therefore, the signal-to-noise ratio of the received signal in the television receiver 320 can be further increased, and in indoor or indoor reception, the maximum reception sensitivity can be obtained at a place where the television receiver 320 is placed, and better television viewing can be performed. .
  • the main body does not move as it is in the preferred location, and the sharing of vertical polarized waves, horizontal polarized waves, and directional radiation patterns with each antenna is changed.
  • the advantage of being able to find out the reception status of is born.
  • the above-mentioned advantages are achieved by taking advantage of redundancy by increasing the number of antennas from the minimum of three that can maintain the orthogonal relationship of each antenna and cover all directions of vertical polarization, horizontal polarization, and horizontal plane.
  • up to one or more movable antennas and any antenna may be movable.
  • Various types of antennas can also be applied. Below are some examples and benefits.
  • FIG. 11 is a conceptual diagram showing an antenna configuration of another example of the television receiver 321 according to Embodiment 2 of the present invention.
  • the television receiver 321 includes whip antennas 1941 and 1942.
  • Whip antennas 1941 and 1942 improve the reception performance by making the element length longer than 3/4 wavelength or the like, and are easy to realize mobility by using a flexible material.
  • the antenna radiation patterns of whip antennas 1941 and 1942 with longer element lengths are suppressed in the vertical direction, but on the other hand, the sensitivity of horizontal polarization in the horizontal plane is improved. Furthermore, since it extends downward, it has sensitivity to vertical polarization.
  • FIG. 12 is a conceptual diagram showing an antenna configuration of another example of television receiver 322 according to Embodiment 2 of the present invention.
  • the television receiver 322 includes sleeve antennas 1931 and 1932.
  • the sleeve antennas 1931 and 1932 do not use the chassis as a ground, unlike a monopole or a whip. Therefore, it is difficult to receive various noise signals generated from the main circuit, which is likely to be a problem with the antenna directly attached to the chassis main body 102. As a result, there is an advantage that it is easy to realize a television receiver 322 with higher sensitivity.
  • FIG. 13 is a conceptual diagram showing an antenna configuration of another example of the television receiver 323 according to Embodiment 2 of the present invention.
  • the television receiver 323 includes dipole antennas 1921 and 1922 at the left and right ends of the chassis main body 102, respectively. Since the dipole antennas 1921 and 1922 are balanced antennas that do not use the chassis as a ground, it is difficult to receive various noise signals generated from the body circuit, which are likely to cause problems with antennas directly attached to the chassis body 102. As a result, there is an advantage that it is easy to realize a television receiver 323 with higher sensitivity.
  • FIG. 14 is a conceptual diagram showing an antenna configuration of another example of television receiver 324 according to Embodiment 2 of the present invention.
  • the television receiver 324 is less likely to receive various noise signals generated from the main circuit by attaching the dipole antennas 1921 and 1922 to the upper and both shoulders of the chassis main body 102.
  • FIG. 15 is a conceptual diagram showing an antenna configuration of another example of television receiver 325 according to Embodiment 2 of the present invention.
  • the television receiver 325 includes V-type dipole antennas 1951 and 1952.
  • the television receiver 325 has an advantage of making it difficult to receive noise by changing the V-type dipole antennas 1951 and 1952 into modified V-type dipoles.
  • the television receiver 325 may distribute directivity between the left and right V-shaped dipole antennas 1951 and 1952, and may direct the directivity toward the outside of the chassis main body 102. By doing so, there is an advantage that a more sensitive television receiver 325 can be realized.
  • FIG. 16 is a conceptual diagram showing an antenna configuration of another example of television receiver 326 according to Embodiment 2 of the present invention.
  • the television receiver 326 includes circular loop antennas 1961 and 1962.
  • the television receiver 326 receives more various noise signals generated from the main body circuit by providing circular loop antennas 1961 and 1962 that are balanced antennas that do not use the chassis as a ground at a higher position of the chassis main body 102. It can be difficult. Therefore, there is an advantage that the television receiver 326 having high sensitivity can be easily realized.
  • FIG. 17 is a conceptual diagram showing an antenna configuration of another example of the television receiver 327 according to Embodiment 2 of the present invention.
  • the television receiver 327 includes rectangular loop antennas 1971 and 1972.
  • the television receiver 327 has advantages that the rectangular loop antennas 1971 and 1972 are balanced antennas that are resistant to noise, and that the protrusions to the rear and upward, which are difficult for users and aesthetics, can be reduced. Arise.
  • FIG. 18 is a conceptual diagram showing an antenna configuration of another example of television receiver 328 according to Embodiment 2 of the present invention.
  • the antenna terminals are closer to each other by taking the feed points of the rectangular loop antennas 1971 and 1972 upward as shown in FIG. 18 than taking the feed points of the rectangular loop antennas 1971 and 1972 downward. Can be placed.
  • this arrangement makes it possible to place a feeding point that becomes an antinode of current distribution at a high position, which is advantageous in obtaining a higher signal-to-noise ratio.
  • the rectangular loop antennas 1971 and 1972 are composed of linear elements having an overall length of approximately wavelength ⁇ , have a radiation pattern in the vertical direction of the rectangular loop surface, and the long side of the rectangle is up and down. Is suppressed.
  • the rectangular loop antennas 1971 and 1972 there is an advantage that the sensitivity of horizontal polarization in the horizontal plane is good.
  • FIG. 19 is a conceptual diagram showing an antenna configuration of another example of television receiver 329 according to Embodiment 2 of the present invention.
  • the television receiver 329 includes an offset dipole antenna 1923.
  • the offset dipole antenna 1923 has a configuration in which the feeding position of the upper dipole antenna 192 in FIG. 15 is modified, and the directivity of horizontal polarization is the same as that of a normal dipole. Further, since the feeding position of the offset dipole antenna 1923 is greatly separated from the monopole antenna 191, interference between the parallel feed line of the dipole and the monopole antenna 191 is eliminated, and the circular directivity is maintained. Further, in the television receiver 325 of FIG.
  • the television receiver 329 has an advantage of giving a degree of freedom to the selection of the feeding position in the upper part of the chassis main body 102.
  • FIG. 20 is a conceptual diagram showing an antenna configuration of another example of the television receiver 330 according to Embodiment 2 of the present invention.
  • the television receiver 330 has an L-shaped monopole antenna 1913.
  • the L-shaped monopole antenna 1913 is a linear antenna that is formed in an L-shape by opening the tip along the upper end portion of the chassis main body 102 and bending it near the feeding portion.
  • the L-shaped monopole antenna 1913 can receive vertically polarized waves generated in the chassis main body 102 and the linear portion, and its directivity is substantially circular.
  • the L-shaped monopole antenna 1913 is less likely to interfere with the dipole antenna 192 because the linear portions are parallel to each other.
  • the L-shaped monopole antenna 1913 there is an advantage that a degree of freedom is given to selection of a feeding position in the upper part of the chassis main body 102.
  • FIG. 21 is a conceptual diagram showing an antenna configuration of television receiving apparatus 331 according to Embodiment 3 of the present invention.
  • the television receiver 331 includes an antenna switching unit 170 and an external antenna connection terminal 180.
  • the external antenna connection terminal 180 can connect the outdoor antenna 210 or the indoor antenna 220 through the antenna cable 200.
  • the antenna switching unit 170 can switch between the external antenna connection terminal 180 and any one of the antennas attached to the chassis main body 102.
  • the present embodiment is different from the second embodiment in that an antenna switching unit 170 is provided and an external antenna connection terminal 180 and an antenna cable 200 are used instead of one system (here, the monopole antenna 1911).
  • the outdoor antenna 210 connected to the wall antenna terminal 205 can be connected.
  • the antenna cable 200 can be connected to the indoor antenna 220.
  • Others are the same as those described in the first and second embodiments, and thus will be omitted.
  • an antenna switching unit 170 is provided so that an external antenna can be connected instead of one system. Therefore, when there is the wall antenna terminal 205 near or by adding the indoor antenna 220 near, the three antennas that are orthogonally arranged, as described in the first embodiment, the vertical / horizontal polarization, horizontal plane In addition to taking advantage of the incoming wave power around the inner circumference, the signals of the additional antennas can be added together. As a result, the signal-to-noise ratio of the received signal can be further increased, and better and more stable TV viewing can be performed.
  • the television receiver according to the present invention uses an incoming wave from any direction of a vertically polarized wave, a horizontally polarized wave, and a horizontal plane, regardless of where the antenna-equipped television receiver is placed at random in an indoor or indoor diffuse reflection environment. By combining them, the signal-to-noise ratio of the received signal can be positively increased. As a result, it is possible to perform better and more stable television viewing, which is useful as a television receiving device for viewing indoors or indoors in a free style.

Abstract

A television receiver comprises: two or more horizontally polarized wave antennas attached to the main chassis and receiving horizontally polarized waves; a vertically polarized wave antenna attached to the main chassis and receiving vertically polarized waves; a synthesizer for adjusting the phases of three or more signals received by the two or more horizontally polarized wave antennas and the vertically polarized wave antenna so that the carrier wave phases overlap each other and for weighting and synthesizing the signals; and a decoder for decoding the signal synthesized by the synthesizer.  The two or more horizontally polarized wave antennas are disposed so that the directional radio patterns thereof form a mutually complementary relationship, thereby using incoming waves from any direction in a horizontal plane as well as vertically and horizontally polarized waves to synthesize and make use of these waves.

Description

テレビ受信装置TV receiver
　本発明は、屋内または室内の乱反射環境にてテレビ放送を受信するテレビ受信装置に関するものである。 The present invention relates to a television receiver that receives a television broadcast in an indoor or indoor diffuse reflection environment.
　今日ではテレビの視聴スタイルが様々になっている。テレビを視聴するために、従来の通常のテレビ受信装置の設置形態では、屋外にアンテナを設置し、ケーブル敷設工事を行って設けた壁面アンテナ端子に、テレビ受信装置からのケーブルを接続する必要があった。そして、アンテナで受信した信号をテレビ受信装置に入力する必要があった。このような通常の設置形態では、壁面アンテナ端子のある部屋で、しかも壁面アンテナ端子に近い場所にテレビ受信装置を設置するのが一般的であった。したがって、自由な視聴スタイルに対して強い制約条件となる。つまり、屋内または室内にて、どこにでも持ち運べ、好きな所に置いたらすぐに使える、言わばフリースタイルのテレビ受信装置は、極めて魅力的である。 Today, TV viewing styles are different. In order to watch TV, in the conventional installation form of a normal TV receiver, it is necessary to connect the cable from the TV receiver to the wall antenna terminal installed by installing the antenna outdoors and laying the cable. there were. And it was necessary to input the signal received with the antenna to the television receiver. In such a normal installation mode, it is common to install a television receiver in a room with a wall antenna terminal and in a place near the wall antenna terminal. Therefore, it becomes a strong restriction condition for a free viewing style. In other words, a free-style television receiver, which can be carried anywhere in the room or indoors and can be used as soon as it is placed, is very attractive.
　従来の壁面アンテナ端子に制約を受けない屋内または室内用テレビ受信装置は、室内に設置したアンテナ、いわゆる室内アンテナで放送波を受信し、アンテナ線にて室内アンテナをテレビ受信装置に接続し、視聴するのが一般的である。 Conventional indoor or indoor television receivers that are not restricted by the wall antenna terminal receive broadcast waves with indoor antennas, so-called indoor antennas, and connect the indoor antennas to the television receivers with antenna wires and view It is common to do.
　従来のアンテナの第１の例を図２２Ａに示す。図２２Ａに示すように、アンテナ６００は、内部に８の字型のアンテナ素子６１０と、そのアンテナ素子６１０の背面に反射板６２０とを有している。このような構成により、小型ではあるが単一方向に指向性を絞り、アンテナ利得を得ることができるアンテナが開示されている（特許文献１参照）。そして、小型であることを活かして、アンテナ６００を室内に設置し、ケーブルにてアンテナ６００をテレビ受信装置に接続し、室内にて視聴する形態も開示されている。図２２Ｂに示すように、屋内６７０または室内の受信においては、電波の建物への侵入透過損失によって、電界強度が低下して、良好な受信は難しい。そのため、テレビ受信装置６５０の前側方の近くの窓６６０から屋内６７０に入り込む到来電波を主に受信することが望ましい。そのために、アンテナ６００を適切な方向に向けて設置するために、アンテナ指向性を窓６６０に向けて前方としたアンテナ６００ａとして、または側方としたアンテナ６００ｂとして設置することで改善する方法が提案されている。 FIG. 22A shows a first example of a conventional antenna. As shown in FIG. 22A, the antenna 600 has an 8-shaped antenna element 610 inside, and a reflector 620 on the back surface of the antenna element 610. With such a configuration, there is disclosed an antenna that is small but has a directivity narrowed in a single direction to obtain an antenna gain (see Patent Document 1). Then, taking advantage of the small size, a mode is also disclosed in which the antenna 600 is installed indoors, the antenna 600 is connected to a television receiver with a cable, and viewing is performed indoors. As shown in FIG. 22B, in indoor 670 or indoor reception, the electric field strength is reduced due to intrusion transmission loss of radio waves into the building, and good reception is difficult. Therefore, it is desirable to mainly receive incoming radio waves entering the indoor 670 from the window 660 near the front side of the television receiver 650. Therefore, in order to install the antenna 600 in an appropriate direction, a method for improving the antenna directivity by installing the antenna 600a as the front antenna 600a toward the window 660 or as the side antenna 600b is proposed. Has been.
　従来のアンテナの第２の例は、図２３Ａに示すように放物面状に見える構造体７１０を有している。図２３Ｂ、図２３Ｃに示すように放物面状に見える構造体７１０の背面には、溝７２０が設けられている。また、図２３Ｄの正面図、図２３Ｅの側面図に示すようなアンテナエレメント７３０が収められている。このような構成により、通常のダイポールの８の字型の指向特性より側方の指向特性の窪みを軽減し、指向特性を逆に弱めた室内アンテナが開示されている（特許文献２参照）。このようにして、指向特性を逆に弱めることで、特定の方向からの到来波に対し、アンテナの置く向きにより、受信状況が極端に悪くならないようにすることができる方法が提案されている。なお、併せて、特許文献２には、上述の変形ダイポールとロッドアンテナ７４０をスイッチ７５０で切り替え、置いた場所で受信状態の良好な方を用いる考えも開示されている。 A second example of a conventional antenna has a structure 710 that looks like a paraboloid as shown in FIG. 23A. As shown in FIGS. 23B and 23C, a groove 720 is provided on the back surface of the structure 710 that looks like a paraboloid. Further, an antenna element 730 as shown in the front view of FIG. 23D and the side view of FIG. 23E is housed. With such a configuration, an indoor antenna has been disclosed in which a depression of a side directivity characteristic is reduced and a directivity characteristic is weakened on the contrary, as compared with an 8-shaped directivity characteristic of a normal dipole (see Patent Document 2). Thus, a method has been proposed in which the directivity is weakened in the opposite direction so that the reception situation does not become extremely bad depending on the direction in which the antenna is placed with respect to an incoming wave from a specific direction. In addition, Patent Document 2 also discloses the idea of switching the above-described modified dipole and rod antenna 740 with a switch 750 and using the better reception state at the place where the switch is placed.
　従来のアンテナの第３の例を図２４Ａに示す。図２４Ａに示すように、テレビ受信装置８００は、表示部８１０を含むテレビ受像機本体８３０とキーボード８２０との一体型になっている。そして、図２４Ｂに示すようにキーボード８２０の内部に室内アンテナ８２１を内蔵している。室内アンテナ８２１は、テレビ受信装置８００のキーボード８２０に取り付けられている代わりに、室内アンテナ８２１の給電エレメントの前後にある無給電エレメントに装荷されたバラクタダイオードへの印加電圧を制御することで、アンテナ指向性の方向を適切に制御することができる（特許文献３参照）。このような方法は、アンテナとテレビ受信装置間のケーブルを省いて一体の構造にできるため、フリースタイルの観点では、機動性が高まって好ましい。 FIG. 24A shows a third example of a conventional antenna. As shown in FIG. 24A, the television receiver 800 is an integrated body of a television receiver body 830 including a display unit 810 and a keyboard 820. Then, as shown in FIG. 24B, an indoor antenna 821 is built in the keyboard 820. Instead of being attached to the keyboard 820 of the television receiver 800, the indoor antenna 821 controls the voltage applied to the varactor diodes loaded on the parasitic elements before and after the power supply element of the indoor antenna 821. The direction of directivity can be appropriately controlled (see Patent Document 3). Such a method can be integrated with the cable between the antenna and the television receiver omitted, so that it is preferable from the viewpoint of freestyle because of high mobility.
　従来のアンテナの第４の例としては、図２５のように矩形リング状に変形されたダイポール９１０と、Ｌ字型に変形されたモノポールアンテナ９２０とを組み合わせ、良い方のアンテナを切り替え選択する、屋外および車載での移動環境用のダイバーシチアンテナが提案されている（特許文献４参照）。矩形リング状に変形されたダイポール９１０は、特許文献２と同様、水平偏波を受信しつつ、通常のダイポールの８の字型と異なり、ほぼ無指向性の指向特性を得ることができる。また、Ｌ字型に変形されたモノポールアンテナ９２０は、水平偏波成分だけでなく、垂直立ち上がり部分で垂直偏波成分も受信することができる。移動受信環境では、各アンテナの受信信号レベルが異なる変動をすることを利用するダイバーシチ効果による改善が期待できる。しかし、屋内および室内での半固定受信環境においては、このようなダイバーシチによる改善効果は期待できない。このように従来のアンテナの第４の例は、特許文献２と同様、置いた場所で受信状態の良好な方を選択的に用いる考えは共通している。 As a fourth example of a conventional antenna, a dipole 910 deformed into a rectangular ring shape as shown in FIG. 25 and a monopole antenna 920 deformed into an L-shape are combined, and a better antenna is switched and selected. Diversity antennas for outdoor and on-vehicle mobile environments have been proposed (see Patent Document 4). The dipole 910 deformed into a rectangular ring shape can receive horizontal polarization and can obtain a substantially omnidirectional directional characteristic, unlike the figure 8 of a normal dipole, while receiving horizontal polarization. In addition, the monopole antenna 920 transformed into an L-shape can receive not only the horizontal polarization component but also the vertical polarization component at the vertical rising portion. In a mobile reception environment, an improvement can be expected due to the diversity effect that utilizes the fact that the received signal level of each antenna varies differently. However, such an improvement effect due to diversity cannot be expected in indoor and semi-fixed reception environments. As described above, in the fourth example of the conventional antenna, as in Patent Document 2, the idea of selectively using the better reception state at the place where the antenna is placed is common.
　しかしながら、一般的に、屋内および室内に設置したアンテナによるテレビ受信においては、放送局方向に開口する窓が近くにある場合を除き、屋内または室内に侵入した電波は壁や天井や床や家具等で多重反射伝搬を経た結果、色々な方向から電波が到来する。しかも、到来する電波は、反射によって偏波面が回転するので、特許文献１または特許文献３のような従来の構成では、利得最大の単方向からの、しかも、特定の偏波面の到来波以外はうまく活かせず、受信状況を改善できないことが多い。一方、特許文献２または特許文献４のような従来の構成では、エレメントを変形する等により指向性を広げた場合、あるいは、エレメントの変形や傾斜なども加えて垂直偏波および水平偏波の両方を受けられるようにした場合、色々な到来方向や偏波の電波を受信できる。その反面、任意の方向および任意の偏波におけるアンテナ利得は全体に低下してしまうために、結局、受信状況を改善できない。また、特許文献２または特許文献４のように、複数のアンテナにおいて、良好な方のアンテナを選択切り替える従来の構成においても、半固定の使用スタイルでは、移動の場合とは違って、異なる変動を利用したダイバーシチとしての改善効果も期待できない。したがって、様々な到来方向および偏波に到来波電力が分散している場合は、結局、すべてのアンテナの受信電力を有効に活かせない。その結果、受信状況はあまり改善されないという課題が存在する。 However, in general, for television reception using antennas installed indoors and indoors, radio waves that have entered indoors or indoors are transmitted through walls, ceilings, floors, furniture, etc., except when there is a window near the broadcasting station. As a result of the multiple reflection propagation, radio waves arrive from various directions. Moreover, since the plane of polarization of incoming radio waves is rotated by reflection, in the conventional configuration such as Patent Document 1 or Patent Document 3, except for an incoming wave from a single direction with the maximum gain and a specific polarization plane In many cases, the reception situation cannot be improved due to poor use. On the other hand, in the conventional configuration such as Patent Document 2 or Patent Document 4, when the directivity is expanded by deforming the element, or both the vertically polarized wave and the horizontally polarized wave are added in addition to the deformation and inclination of the element. Can receive radio waves of various directions and polarizations. On the other hand, since the antenna gain in an arbitrary direction and an arbitrary polarization is reduced as a whole, the reception situation cannot be improved after all. Also, as in Patent Document 2 or Patent Document 4, even in a conventional configuration in which a better antenna is selected and switched among a plurality of antennas, in a semi-fixed use style, different fluctuations are generated unlike in the case of movement. The improvement effect as the diversity used cannot be expected. Therefore, when the arrival wave power is dispersed in various arrival directions and polarizations, the reception power of all the antennas cannot be effectively used after all. As a result, there is a problem that the reception situation is not improved so much.
特開２００８－１１８３５３号公報JP 2008-118353 A 特許第２６７５９７３号公報Japanese Patent No. 2675973 特許第３８４７３０１号公報Japanese Patent No. 3847301 特許第３１６５４６５号公報Japanese Patent No. 3165465
　本発明のテレビ受信装置は、所定方向の偏波を送信する放送局からの放送波を屋内室内にて受信するテレビ受信装置であって、シャーシ本体と、２つ以上の水平偏波用アンテナと、１つ以上の垂直偏波用アンテナと、合成部と、復調部を備えている。２つ以上の水平偏波用アンテナは、シャーシ本体に取り付けられた水平方向の偏波を受信する。１つ以上の垂直偏波用アンテナは、シャーシ本体に取り付けられた垂直方向の偏波を受信する。合成部は、２つ以上の水平偏波用アンテナと１つ以上の垂直偏波用アンテナが受信した３つ以上の信号を搬送波位相が重なるように位相調整し重み付けを行って合成する。復調部は、合成部が合成した信号を復調する。 A television receiver of the present invention is a television receiver that receives broadcast waves from a broadcasting station that transmits polarized waves in a predetermined direction in an indoor room, and includes a chassis body, two or more horizontally polarized antennas, One or more vertically polarized antennas, a synthesis unit, and a demodulation unit are provided. Two or more horizontally polarized antennas receive horizontally polarized waves attached to the chassis body. One or more vertically polarized antennas receive vertically polarized waves attached to the chassis body. The synthesizer synthesizes three or more signals received by two or more horizontally polarized antennas and one or more vertically polarized antennas by adjusting the phase so that the carrier wave phases overlap and performing weighting. The demodulation unit demodulates the signal synthesized by the synthesis unit.
　そして、２つ以上の水平偏波用アンテナは、互いに指向性放射パターンが補完関係になるように配置されている。 The two or more horizontally polarized antennas are arranged so that the directional radiation patterns are complementary to each other.
　このような構成によって、水平偏波成分および垂直偏波成分のどちらに対しても、水平面のいずれの方向からの到来波も合成活用することで受信信号の信号対雑音比を積極的に高めることができ、より良好で安定したテレビ視聴が可能となる。 With such a configuration, the signal-to-noise ratio of the received signal is positively increased by combining and utilizing incoming waves from any direction on the horizontal plane for both horizontal and vertical polarization components. This enables better and more stable TV viewing.
図１Ａは、本発明の実施の形態１におけるテレビ受信装置のアンテナ構成を示す概念図である。FIG. 1A is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 1 of the present invention. 図１Ｂは、本発明の実施の形態１におけるテレビ受信装置のアンテナ構成を示す概念図である。FIG. 1B is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 1 of the present invention. 図２Ａは、本発明の実施の形態１におけるテレビ受信装置のアンテナの水平面における指向性放射パターンを示した図である。FIG. 2A is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 1 of the present invention. 図２Ｂは、本発明の実施の形態１におけるテレビ受信装置のアンテナの水平面における指向性放射パターンを示した図である。FIG. 2B is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 1 of the present invention. 図２Ｃは、本発明の実施の形態１におけるテレビ受信装置のアンテナの水平面における指向性放射パターンを示した図である。FIG. 2C is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 1 of the present invention. 図３は、本発明の実施の形態１におけるテレビ受信装置の各アンテナの水平面における指向性放射パターンを重ね合わせた指向性放射パターンを示した図である。FIG. 3 is a diagram showing a directional radiation pattern obtained by superimposing directional radiation patterns on the horizontal plane of each antenna of the television receiver according to Embodiment 1 of the present invention. 図４は、本発明の実施の形態１におけるテレビ受信装置の回路構成を示すブロック図である。FIG. 4 is a block diagram showing a circuit configuration of the television receiver according to Embodiment 1 of the present invention. 図５は、本発明の実施の形態１におけるテレビ受信装置の合成部の内部構成を示すブロック図である。FIG. 5 is a block diagram showing an internal configuration of the combining unit of the television receiver according to Embodiment 1 of the present invention. 図６は、本発明の実施の形態１におけるテレビ受信装置の合成部の内部構成図である。FIG. 6 is an internal configuration diagram of the combining unit of the television receiver according to Embodiment 1 of the present invention. 図７は、本発明の実施の形態２のテレビ受信装置のアンテナ構成を示す概念図である。FIG. 7 is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 2 of the present invention. 図８Ａは、本発明の実施の形態２におけるテレビ受信装置のアンテナの水平面における指向性放射パターンを示した図である。FIG. 8A is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 2 of the present invention. 図８Ｂは、本発明の実施の形態２におけるテレビ受信装置のアンテナの水平面における指向性放射パターンを示した図である。FIG. 8B is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 2 of the present invention. 図８Ｃは、本発明の実施の形態２におけるテレビ受信装置のアンテナの水平面における指向性放射パターンを示した図である。FIG. 8C is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 2 of the present invention. 図８Ｄは、本発明の実施の形態２におけるテレビ受信装置のアンテナの水平面における指向性放射パターンを示した図である。FIG. 8D is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver in Embodiment 2 of the present invention. 図９は、本発明の実施の形態２におけるテレビ受信装置の各アンテナの水平面における指向性放射パターンを重ね合わせた指向性放射パターンを示した図である。FIG. 9 is a diagram showing a directional radiation pattern obtained by superimposing directional radiation patterns on the horizontal plane of each antenna of the television receiver according to Embodiment 2 of the present invention. 図１０は、本発明の実施の形態２におけるテレビ受信装置の回路構成を示すブロック図である。FIG. 10 is a block diagram showing a circuit configuration of the television receiver according to Embodiment 2 of the present invention. 図１１は、本発明の実施の形態２における他の１例のテレビ受信装置のアンテナ構成を示す概念図である。FIG. 11 is a conceptual diagram showing an antenna configuration of another example of a television receiving apparatus according to Embodiment 2 of the present invention. 図１２は、本発明の実施の形態２における他の１例のテレビ受信装置のアンテナ構成を示す概念図である。FIG. 12 is a conceptual diagram showing an antenna configuration of another example of the television receiving apparatus according to Embodiment 2 of the present invention. 図１３は、本発明の実施の形態２における他の１例のテレビ受信装置のアンテナ構成を示す概念図である。FIG. 13 is a conceptual diagram showing an antenna configuration of another example of the television receiver according to Embodiment 2 of the present invention. 図１４は、本発明の実施の形態２における他の１例のテレビ受信装置のアンテナ構成を示す概念図である。FIG. 14 is a conceptual diagram showing an antenna configuration of another example of a television receiver according to Embodiment 2 of the present invention. 図１５は、本発明の実施の形態２における他の１例のテレビ受信装置のアンテナ構成を示す概念図である。FIG. 15 is a conceptual diagram showing an antenna configuration of another example of the television receiving apparatus according to Embodiment 2 of the present invention. 図１６は、本発明の実施の形態２における他の１例のテレビ受信装置のアンテナ構成を示す概念図である。FIG. 16 is a conceptual diagram showing an antenna configuration of another example of the television receiving apparatus according to Embodiment 2 of the present invention. 図１７は、本発明の実施の形態２における他の１例のテレビ受信装置のアンテナ構成を示す概念図である。FIG. 17 is a conceptual diagram showing an antenna configuration of another example of the television receiving apparatus according to Embodiment 2 of the present invention. 図１８は、本発明の実施の形態２における他の１例のテレビ受信装置のアンテナ構成を示す概念図である。FIG. 18 is a conceptual diagram showing an antenna configuration of another example of a television receiving apparatus according to Embodiment 2 of the present invention. 図１９は、本発明の実施の形態２における他の１例のテレビ受信装置のアンテナ構成を示す概念図である。FIG. 19 is a conceptual diagram showing an antenna configuration of another example of the television receiver in Embodiment 2 of the present invention. 図２０は、本発明の実施の形態２における他の１例のテレビ受信装置のアンテナ構成を示す概念図である。FIG. 20 is a conceptual diagram showing an antenna configuration of another example of a television receiving apparatus according to Embodiment 2 of the present invention. 図２１は、本発明の実施の形態３におけるテレビ受信装置のアンテナ構成を示す概念図である。FIG. 21 is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 3 of the present invention. 図２２Ａは、従来の第１のアンテナ構成を示す概念図である。FIG. 22A is a conceptual diagram showing a conventional first antenna configuration. 図２２Ｂは、従来の第１のアンテナ構成を示す概念図である。FIG. 22B is a conceptual diagram showing a first conventional antenna configuration. 図２３Ａは、従来の第２のアンテナ構成を示す概念図である。FIG. 23A is a conceptual diagram showing a conventional second antenna configuration. 図２３Ｂは、従来の第２のアンテナ構成を示す概念図である。FIG. 23B is a conceptual diagram showing a conventional second antenna configuration. 図２３Ｃは、従来の第２のアンテナ構成を示す概念図である。FIG. 23C is a conceptual diagram showing a conventional second antenna configuration. 図２３Ｄは、従来の第２のアンテナ構成を示す概念図である。FIG. 23D is a conceptual diagram showing a conventional second antenna configuration. 図２３Ｅは、従来の第２のアンテナ構成を示す概念図である。FIG. 23E is a conceptual diagram showing a conventional second antenna configuration. 図２４Ａは、従来の第３のアンテナ構成を示す概念図である。FIG. 24A is a conceptual diagram showing a conventional third antenna configuration. 図２４Ｂは、従来の第３のアンテナ構成を示す概念図である。FIG. 24B is a conceptual diagram showing a conventional third antenna configuration. 図２５は、従来の第４のアンテナ構成を示す概念図である。FIG. 25 is a conceptual diagram showing a conventional fourth antenna configuration.
　（実施の形態１）
　以下、本発明を実施するための最良の形態について、図面を参照しながら説明する。まず、本発明の実施の形態１におけるテレビ受信装置のアンテナの構成について説明する。図１Ａ、図１Ｂは、本実施の形態におけるテレビ受信装置１００のアンテナ構成を示す概念図である。 (Embodiment 1)
The best mode for carrying out the present invention will be described below with reference to the drawings. First, the configuration of the antenna of the television receiver in Embodiment 1 of the present invention will be described. 1A and 1B are conceptual diagrams showing an antenna configuration of television receiving apparatus 100 in the present embodiment.
　図１Ａは、テレビ受信装置１００の正面からの投影図を示す。図１Ｂは、テレビ受信装置１００の斜め後方からの投影図を示す。テレビ受信装置１００は、表示部１５０と、支持部１０３と、シャーシ本体１０２と、シャーシ本体１０２に取り付けられたアンテナ部１９０としてのモノポールアンテナ１９１、ダイポールアンテナ１９２、スリーブアンテナ１９３の３つのアンテナとを備えている。 FIG. 1A shows a projection view from the front of the television receiver 100. FIG. 1B shows a projection view of the television receiver 100 from an oblique rear side. The television receiver 100 includes a display unit 150, a support unit 103, a chassis main body 102, three antennas including a monopole antenna 191, a dipole antenna 192, and a sleeve antenna 193 as an antenna unit 190 attached to the chassis main body 102. It has.
　アンテナ部１９０の３つのアンテナは、それぞれ、以下のように配置されている。すなわち、モノポールアンテナ１９１が水平面に対して鉛直になる配置、ダイポールアンテナ１９２が水平面に対しての平行な配置、スリーブアンテナ１９３が水平面に対して平行で、かつ、ダイポールアンテナ１９２と直交する配置となっている。また、アンテナ部１９０は、これら３つのアンテナのエレメントが互いに直交する配置となっている。なお、スリーブアンテナ１９３は、給電同軸線のλ／４長の中心導体と先端が開放となるλ／４長の同軸外皮導体からなる一種のダイポールアンテナである。 The three antennas of the antenna unit 190 are arranged as follows. That is, the monopole antenna 191 is disposed perpendicular to the horizontal plane, the dipole antenna 192 is disposed parallel to the horizontal plane, the sleeve antenna 193 is parallel to the horizontal plane, and is disposed perpendicular to the dipole antenna 192. It has become. The antenna unit 190 has an arrangement in which the elements of these three antennas are orthogonal to each other. The sleeve antenna 193 is a kind of dipole antenna composed of a λ / 4 long central conductor of a feeding coaxial line and a λ / 4 long coaxial outer conductor whose tip is open.
　次に、本発明の実施の形態１におけるテレビ受信装置１００のアンテナ指向性放射パターンについて説明する。図２Ａはモノポールアンテナ１９１の水平面における垂直偏波成分の指向性放射パターンを示した図である。図２Ｂはダイポールアンテナ１９２の水平面における水平偏波成分の指向性放射パターンを示した図である。図２Ｃはスリーブアンテナ１９３の水平面における水平偏波成分の指向性放射パターンを示した図である。 Next, the antenna directivity radiation pattern of the television receiver 100 according to Embodiment 1 of the present invention will be described. FIG. 2A is a diagram showing a directional radiation pattern of a vertically polarized component in the horizontal plane of the monopole antenna 191. FIG. FIG. 2B is a diagram showing a directional radiation pattern of a horizontally polarized wave component on the horizontal plane of the dipole antenna 192. FIG. 2C is a diagram showing a directional radiation pattern of a horizontally polarized wave component on the horizontal plane of the sleeve antenna 193.
　図３は、図２Ａ、図２Ｂ、図２Ｃに示した各アンテナの水平面における指向性放射パターンを重ね合わせた指向性放射パターンを示した図である。垂直偏波成分に関しては、点線で示したように、モノポールアンテナ１９１の円形放射パターンにより、どの方向からの信号も受信しうる。水平偏波成分に関しては、実線で示したように、ダイポールアンテナ１９２とスリーブアンテナ１９３の８の字の放射パターンが重なって、どの方向からの信号も受信しうる。 FIG. 3 is a diagram showing a directional radiation pattern in which the directional radiation patterns on the horizontal plane of each antenna shown in FIGS. 2A, 2B, and 2C are superimposed. With respect to the vertical polarization component, as indicated by the dotted line, the signal from any direction can be received by the circular radiation pattern of the monopole antenna 191. With respect to the horizontal polarization component, as shown by the solid line, the 8-shaped radiation patterns of the dipole antenna 192 and the sleeve antenna 193 overlap to receive signals from any direction.
　なお、水平偏波用アンテナは、ダイポールアンテナ１９２とスリーブアンテナ１９３との２つを例としてあげたが、２つ以上であれば本発明を適用できる。すなわち、２つ以上の水平偏波用アンテナは、それぞれ互いに指向性放射パターンが補完関係になるように配置されていることが重要である。 In addition, although two dipole antennas 192 and sleeve antennas 193 are given as examples of horizontally polarized antennas, the present invention can be applied to two or more antennas. In other words, it is important that two or more horizontally polarized antennas are arranged so that their directional radiation patterns are complementary to each other.
　同様に、垂直偏波用アンテナは、モノポールアンテナ１９１の１つを例としてあげたが、２つ以上でも本発明を適用できる。すなわち、２つ以上の垂直偏波用アンテナは、それぞれ互いに指向性放射パターンが補完関係になるように配置されていることが重要である。数が多いほど、指向性パターンを全方位に平均化できるので好ましい。しかし、アンテナの数が多いほど、アンテナより後段の回路構成が複雑となるので、目的にあった適切なアンテナの数を選択するべきである。 Similarly, as the vertically polarized antenna, one monopole antenna 191 is taken as an example, but the present invention can be applied to two or more antennas. In other words, it is important that two or more vertically polarized antennas are arranged so that their directional radiation patterns are complementary to each other. A larger number is preferable because the directivity pattern can be averaged in all directions. However, the larger the number of antennas, the more complicated the circuit configuration downstream of the antennas. Therefore, an appropriate number of antennas suitable for the purpose should be selected.
　上記したように、本実施の形態におけるテレビ受信装置１００は、シャーシ本体１０２に取り付けられた水平方向の偏波を受信する２つ以上の水平偏波用アンテナ、すなわちダイポールアンテナ１９２とスリーブアンテナ１９３と、シャーシ本体１０２に取り付けられた垂直方向の偏波を受信する１つ以上の垂直偏波用アンテナ、すなわちモノポールアンテナ１９１とを備えている。 As described above, the television receiver 100 according to the present embodiment includes two or more horizontally polarized antennas that are attached to the chassis main body 102 and receive a horizontally polarized wave, that is, a dipole antenna 192 and a sleeve antenna 193. And one or more vertically polarized antennas that are attached to the chassis main body 102 and receive a vertically polarized wave, that is, a monopole antenna 191.
　そして、水平偏波用アンテナはダイポールアンテナ１９２とスリーブアンテナ１９３との２つで構成され、垂直偏波用アンテナは１つのモノポールアンテナ１９１で構成され、２つの水平偏波用アンテナと１つの前記垂直偏波用アンテナとがすべて互いに直交する配置となっている。 The horizontal polarization antenna is composed of two dipole antennas 192 and a sleeve antenna 193, and the vertical polarization antenna is composed of one monopole antenna 191. All of the vertically polarized antennas are orthogonal to each other.
　最後に、本発明の実施の形態１におけるテレビ受信装置１００の回路構成について説明する。図４は、本実施の形態におけるテレビ受信装置１００の回路構成を示すブロック図である。図５は、図４の中の合成部１２０の内部構成を示すブロック図である。 Finally, the circuit configuration of the television receiver 100 according to Embodiment 1 of the present invention will be described. FIG. 4 is a block diagram showing a circuit configuration of television receiver 100 in the present embodiment. FIG. 5 is a block diagram showing an internal configuration of the synthesis unit 120 in FIG.
　図４に示すように、本実施の形態におけるテレビ受信装置１００は、アンテナ部１９０のそれぞれのアンテナであるモノポールアンテナ１９１と、ダイポールアンテナ１９２と、スリーブアンテナ１９３とにそれぞれ接続された低雑音増幅器１１１～１１３と、合成部１２０と、復調誤り訂正部１３０と、映像音声復号部１４０と、表示部１５０と、スピーカ部１６０とを備えている。 As shown in FIG. 4, television receiver 100 according to the present embodiment includes low-noise amplifiers connected to monopole antenna 191, dipole antenna 192, and sleeve antenna 193 that are antennas of antenna unit 190. 111 to 113, a synthesis unit 120, a demodulation error correction unit 130, a video / audio decoding unit 140, a display unit 150, and a speaker unit 160.
　テレビ受信装置１００は、アンテナ部１９０のモノポールアンテナ１９１とダイポールアンテナ１９２とスリーブアンテナ１９３とで受信した各々の信号を、各々の低雑音増幅器１１１～１１３で増幅し、合成部１２０にて合成する。そして、テレビ受信装置１００は合成した信号を復調誤り訂正部１３０にて復調処理および誤り訂正処理が施され受信情報データ列として取り出し、映像音声復号部１４０にて映像信号および音声信号として表示部１５０およびスピーカ部１６０に出力する。 The television receiver 100 amplifies the signals received by the monopole antenna 191, the dipole antenna 192, and the sleeve antenna 193 of the antenna unit 190 by the low-noise amplifiers 111 to 113 and synthesizes them by the synthesis unit 120. . Then, the television receiver 100 performs demodulation processing and error correction processing on the synthesized signal in the demodulation error correction section 130 and extracts it as a received information data sequence, and the video / audio decoding section 140 displays the video signal and audio signal as a display section 150. And output to the speaker unit 160.
　表示部１５０は、液晶表示器やプラズマ表示器等の表示デバイスとそのドライバ回路等で構成されており、受け取った映像信号から受信画像を描画表示する。スピーカ部１６０は、スピーカとその駆動増幅回路等で構成され、受け取った音声信号から音声を発生させる。なお、低雑音増幅器１１１～１１３は、屋内または室内で受信した放送電波の低電界強度環境およびアンテナ一体化に伴う種々の雑音電波混入を考慮すると、アンテナ直下にて、低雑音指数の増幅器で受信電波を増幅することが感度改善を図るため好ましい。ただし、省略してアンテナと合成部１２０とを直結するものであっても構わない。 The display unit 150 includes a display device such as a liquid crystal display or a plasma display and a driver circuit thereof, and draws and displays a received image from the received video signal. The speaker unit 160 includes a speaker and a driving amplifier circuit thereof, and generates sound from the received audio signal. The low noise amplifiers 111 to 113 are received by an amplifier having a low noise index immediately below the antenna in consideration of the low electric field strength environment of the broadcast radio waves received indoors or indoors and various noise radio waves mixed with the antenna integration. It is preferable to amplify radio waves in order to improve sensitivity. However, it may be omitted and the antenna and the combining unit 120 may be directly connected.
　次ぎに、本実施の形態におけるテレビ受信装置１００の回路構成の中の合成部１２０について詳細に説明する。 Next, the synthesis unit 120 in the circuit configuration of the television receiver 100 in the present embodiment will be described in detail.
　図５に示すように、合成部１２０は、フロントエンド部１２１１～１２１３、アナログデジタル（以下、「Ａ／Ｄ」と略記する）変換部１２２１～１２２３、パイロット抽出伝送路推定部１２５１～１２５３、位相補正重み付け部１２６１～１２６３、加算合成部１２７で構成されている。この合成部１２０は、米国等のデジタルテレビ放送方式であるＡＴＳＣ方式に代表されるシングルキャリア方式の場合の構成の一例を示したものである。 As shown in FIG. 5, the combining unit 120 includes front end units 1211 to 1213, analog-digital (hereinafter abbreviated as “A / D”) conversion units 1221 to 1223, pilot extraction transmission path estimation units 1251 to 1253, phase It is composed of correction weighting units 1261 to 1263 and an addition / synthesis unit 127. The synthesizing unit 120 shows an example of a configuration in the case of a single carrier system represented by the ATSC system which is a digital television broadcasting system such as the United States.
　以下、ＡＴＳＣ方式の場合を例として動作を簡単に説明する。ＡＴＳＣ方式の場合の変調方式は、８値残留側波帯（ＶＳＢ）振幅変調方式が用いられる。この変調方式で変調され、アンテナ部１９０の各アンテナで受信したテレビ信号は、まず、フロントエンド部１２１１～１２１３にて、目的信号を選局し適当なレベルまで増幅すると同時に低い周波数帯に変換される。そして、Ａ／Ｄ変換部１２２１～１２２３にてデジタル信号に変換される。ＡＴＳＣ方式の場合、搬送波信号が高いレベルで残存するので、この信号をパイロット信号として、位相補正重み付け部１２６１～１２６３は各々の出力の位相が重なるように位相調整を行い、加算合成部１２７にて足し合わせ合成する。 Hereinafter, the operation will be briefly described by taking the ATSC method as an example. As a modulation method in the case of the ATSC method, an 8-level residual sideband (VSB) amplitude modulation method is used. The television signal modulated by this modulation method and received by each antenna of the antenna unit 190 is first converted to a low frequency band at the same time as the target signal is selected and amplified to an appropriate level by the front end units 1211-1213. The Then, A / D converters 1221 to 1223 convert the digital signals. In the case of the ATSC system, since the carrier signal remains at a high level, the phase correction weighting units 1261 to 1263 adjust the phase so that the phases of the outputs overlap with each other using this signal as a pilot signal, and the addition / synthesis unit 127 Add and synthesize.
　この際、パイロット信号である搬送波信号の信号対雑音比も併せてパイロット抽出伝送路推定部１２５１～１２５３で検出し、その値に比例して、位相補正重み付け部１２６１～１２６３は重み付けも併せて行い、加算合成部１２７にて足し合わせ合成する、いわゆる最大比合成を行うことがより好ましい。 At this time, the signal-to-noise ratio of the carrier wave signal that is a pilot signal is also detected by the pilot extraction transmission path estimation units 1251 to 1253, and the phase correction weighting units 1261 to 1263 also perform weighting in proportion to the value. It is more preferable to perform the so-called maximum ratio combining, in which the addition combining unit 127 adds and combines.
　なお、この重み付けに際して、信号対雑音比の代わりに、パイロット信号である搬送波信号のレベルを用いたり、あるいは、総信号のレベルを代わりに用いたりしても良い。さらには、ＡＴＳＣ信号は広帯域の信号であるので、マルチパス伝送路においては周波数特性が乱れる線形歪を伴うことが多い。したがって、ＡＴＳＣ信号における特定の情報パターン等の信号特徴を用いて、伝送路特性の推定をパイロット抽出伝送路推定部１２５１～１２５３が併せて行うことが望ましい。さらに、位相補正重み付け部１２６１～１２６３が、上記した位相補正と重み付けと同時に、伝送路推定結果の逆数を掛けてマルチパス伝送路歪を補正して、加算合成部１２７で足し合わせ合成する、いわゆる最大比合成を行うことが一層好ましい。このような構成処理を行うことで、合成部１２０では、各々の入力信号をうまく補正調整して加算合成することで、信号対雑音比を積極的に高めた復調用の合成信号を得ることができる。 In this weighting, the level of the carrier signal that is a pilot signal may be used instead of the signal-to-noise ratio, or the level of the total signal may be used instead. Furthermore, since the ATSC signal is a wideband signal, the multipath transmission line often involves linear distortion with a disturbed frequency characteristic. Therefore, it is desirable that the pilot extraction transmission path estimation units 1251 to 1253 perform the estimation of the transmission path characteristics by using signal characteristics such as a specific information pattern in the ATSC signal. Further, the phase correction weighting units 1261 to 1263 correct the multipath transmission line distortion by multiplying the reciprocal of the transmission line estimation result simultaneously with the above phase correction and weighting, and add and combine them by the adder / synthesizer 127. More preferably, maximum ratio synthesis is performed. By performing such configuration processing, the synthesizing unit 120 can obtain a combined signal for demodulation with a positively increased signal-to-noise ratio by correcting and adjusting each input signal well and adding and synthesizing. it can.
　かかる構成によれば、本実施の形態におけるテレビ受信装置１００は、互いに直交するエレメント配置を有する少なくとも３つのアンテナと、これらのアンテナでの受信信号を各々の搬送波位相を互いに合わせ適切な重み付けを行う位相補正重み付け部１２６１～１２６３とを経て、加算合成部１２７で足し合わせて合成した信号を受信信号として復調を行うことができる。ここで、上記した３つのアンテナは、シャーシ本体１０２に取り付けられた垂直方向の偏波を受信する1つ以上の垂直偏波用アンテナと、シャーシ本体１０２に取り付けられた水平方向の偏波を受信し、互いの最大利得方向が互いに直交する２つ以上の水平偏波用アンテナとである。 According to such a configuration, television receiving apparatus 100 in the present embodiment performs at least three antennas having element arrangements orthogonal to each other, and appropriately weights the received signals from these antennas by matching the carrier wave phases with each other. Through the phase correction weighting units 1261 to 1263, it is possible to perform demodulation by using the signal synthesized by the addition synthesis unit 127 and synthesized as a received signal. Here, the three antennas described above receive one or more vertically polarized antennas attached to the chassis main body 102 for receiving vertical polarized waves, and the horizontal polarized waves attached to the chassis main body 102. And two or more horizontally polarized antennas whose maximum gain directions are orthogonal to each other.
　その結果、垂直偏波および水平偏波、水平面のいずれの方向からの到来波も利用し合成することで、受信信号の信号対雑音比を積極的に高めることができる。したがって、屋内または室内受信において、置いた場所で最大限の受信感度を得て、より良好なテレビ視聴を行うことができる。 As a result, the signal-to-noise ratio of the received signal can be positively increased by using and synthesizing incoming waves from any direction of vertical polarization, horizontal polarization, and horizontal plane. Therefore, in indoor or indoor reception, it is possible to obtain the maximum reception sensitivity at the place where it is placed and to perform better television viewing.
　なお、本実施の形態において、合成部１２０を米国等のデジタルテレビ放送方式であるＡＴＳＣ方式に代表されるシングルキャリア方式の場合の構成とした。しかし、日本や欧州等のデジタルテレビ放送方式であるＩＳＤＢ－Ｔ方式やＤＶＢ－Ｔ方式に代表される多数の副搬送波を用いた直交周波数多重（ＯＦＤＭ）方式の場合の構成としても良い。 In the present embodiment, the composition unit 120 is configured in the case of a single carrier system typified by the ATSC system, which is a digital television broadcasting system such as the United States. However, a configuration in the case of an orthogonal frequency multiplexing (OFDM) system using a large number of subcarriers typified by ISDB-T system and DVB-T system, which are digital television broadcasting systems such as Japan and Europe, may be used.
　その場合は、図６に示すように、合成部１２０は、フロントエンド部１２１１～１２１３、Ａ／Ｄ変換部１２２１～１２２３、ガードインターバル（以下、「ＧＩ」と略記する）除去周波数制御部１２３１～１２３３、高速フーリエ変換（以下、「ＦＦＴ」と略記する）部１２４１～１２４３、パイロット抽出伝送路推定部１２５１～１２５３、位相補正重み付け部１２６１～１２６３、加算合成部１２７で構成されている。この合成部１２０は、日本や欧州等のデジタルテレビ放送方式であるＩＳＤＢ－Ｔ方式やＤＶＢ－Ｔ方式に代表される多数の副搬送波を用いた直交周波数多重（ＯＦＤＭ）方式の場合の構成の一例を示したものである。 In this case, as shown in FIG. 6, combining section 120 includes front end sections 1211 to 1213, A / D conversion sections 1221 to 1223, guard interval (hereinafter abbreviated as “GI”) removal frequency control sections 1231 to 1233, Fast Fourier Transform (hereinafter abbreviated as “FFT”) units 1241 to 1243, pilot extraction transmission path estimation units 1251 to 1253, phase correction weighting units 1261 to 1263, and an adder / synthesizer 127. This combining unit 120 is an example of a configuration in the case of an orthogonal frequency multiplexing (OFDM) system using a number of subcarriers typified by ISDB-T system and DVB-T system, which are digital television broadcasting systems such as Japan and Europe. Is shown.
　フロントエンド部１２１１～１２１３、Ａ／Ｄ変換部１２２１～１２２３は、図５での説明と同様であるので省略する。デジタル信号になった各々受信信号は、ＧＩ除去周波数制御部１２３１～１２３３にて、まず、ガードインターバル信号等を用いて、周波数ずれを補正し、また、適当なシンボルタイミングを検出し、ガードインターバル信号を除去し、ＦＦＴ部１２４１～１２４３に信号情報を整理調整して入力する。ＦＦＴ部１２４１～１２４３は、各々受信信号を副搬送波毎に分解して出力する。パイロット抽出伝送路推定部１２５１～１２５３は、シンボル方向および副搬送波方向の両方向に規則的に送信側で予め挿入されたパイロット信号を抽出する。そして、パイロット抽出伝送路推定部１２５１～１２５３は、これらパイロット信号から内挿外挿することで、各副搬送波の振幅と位相を求め、同時にマルチパス伝送路での線形歪を受けた伝送路特性の推定を行う。位相補正重み付け部１２６１～１２６３は、伝送路推定結果の逆数を掛けてマルチパス伝送路歪を補正（周波数等化）するとともに、各系統の対応副搬送波間で位相が重なるように位相調整を行い、加算合成部１２７にて副搬送波毎に足し合わせ合成する。この際、各副搬送波の信号対雑音比の値に比例して、位相補正重み付け部１２６１～１２６３は重み付けも併せて行い、加算合成部１２７にて足し合わせ合成する、いわゆる最大比合成を行うことがより好ましい。なお、この重み付けに際して、信号対雑音比の代わりに、各副搬送波のレベルを代わりに用いても良い。このような構成処理を行うことで、合成部１２０では、各々の入力信号を副搬送波毎にうまく補正調整して加算合成することで、信号対雑音比を積極的に高めた復調用の合成信号を得ることができる。 The front end units 1211 to 1213 and the A / D conversion units 1221 to 1223 are the same as those described with reference to FIG. Each received signal that has become a digital signal is first corrected by the GI removal frequency control units 1231-1233 using a guard interval signal or the like to correct a frequency shift, and an appropriate symbol timing is detected. The signal information is arranged and adjusted and input to the FFT units 1241 to 1243. The FFT units 1241 to 1243 decompose the received signals for each subcarrier and output them. Pilot extraction transmission path estimators 1251 to 1253 extract pilot signals regularly inserted in advance on the transmission side in both the symbol direction and the subcarrier direction. Then, pilot extraction transmission path estimation sections 1251 to 1253 interpolate and extrapolate from these pilot signals to obtain the amplitude and phase of each subcarrier, and at the same time, transmission path characteristics subjected to linear distortion in the multipath transmission path. Estimate Phase correction weighting sections 1261 to 1263 multiply multipath transmission line distortion by multiplying the reciprocal of the transmission path estimation result (frequency equalization), and adjust the phase so that the phases overlap between the corresponding subcarriers of each system. The adder / synthesizer 127 adds and synthesizes each subcarrier. At this time, in proportion to the value of the signal-to-noise ratio of each subcarrier, the phase correction weighting units 1261 to 1263 also perform weighting, and the summing unit 127 adds and synthesizes so-called maximum ratio combining. Is more preferable. In this weighting, the level of each subcarrier may be used instead of the signal-to-noise ratio. By performing such a configuration process, the synthesizing unit 120 corrects and adjusts each input signal for each sub-carrier and adds and synthesizes the synthesized signal for demodulation in which the signal-to-noise ratio is positively increased. Can be obtained.
　（実施の形態２）
　図７は、本発明の実施の形態２のテレビ受信装置３２０のアンテナ構成を示す概念図である。また、図８Ａ、図８Ｂ、図８Ｃ、図８Ｄは、それぞれのアンテナの水平面における指向性放射パターンを示す図である。図９は、それぞれのアンテナの水平面における重ね合わせた水平面における指向性放射パターンを示す図である。図１０は回路構成を示すブロック図を示す。 (Embodiment 2)
FIG. 7 is a conceptual diagram showing an antenna configuration of television receiver 320 according to Embodiment 2 of the present invention. Moreover, FIG. 8A, FIG. 8B, FIG. 8C, and FIG. 8D are figures which show the directional radiation pattern in the horizontal surface of each antenna. FIG. 9 is a diagram showing a directional radiation pattern in a horizontal plane superimposed on the horizontal plane of each antenna. FIG. 10 is a block diagram showing a circuit configuration.
　図７に示すように、実施の形態１の図１Ａのアンテナ構成と本実施の形態におけるテレビ受信装置３２０のアンテナ構成が異なっているのは、１本のスリーブアンテナ１９３の代わりに、可動できる２本のモノポールアンテナ１９１１、１９１２を配置したことである。つまり、シャーシ本体１０２に取り付けられたアンテナ部１９１０は、モノポールアンテナ１９１、ダイポールアンテナ１９２、２本のモノポールアンテナ１９１１、１９１２の４つのアンテナを備えている。なお、ダイポールアンテナ１９２も可動できる構造であってもよい。その他は実施の形態１と同様な符号を付け、図１に基づいた説明と同様であるので説明を省略する。 As shown in FIG. 7, the antenna configuration of FIG. 1A in Embodiment 1 is different from the antenna configuration of the television receiver 320 in this embodiment in that it can be moved instead of one sleeve antenna 193. That is, the monopole antennas 1911 and 1912 are arranged. That is, the antenna unit 1910 attached to the chassis main body 102 includes four antennas, a monopole antenna 191, a dipole antenna 192, and two monopole antennas 1911 and 1912. Note that the dipole antenna 192 may also be movable. Others are denoted by the same reference numerals as those in the first embodiment, and are the same as those described with reference to FIG.
　図８Ａは、モノポールアンテナ１９１の水平面における垂直偏波成分の指向性放射パターンを示した図である。図８Ｂは、ダイポールアンテナ１９２の水平面における水平偏波成分の指向性放射パターンを示した図である。図８Ｃは、モノポールアンテナ１９１１の水平面における水平偏波成分の指向性放射パターンを示した図である。図８Ｄは、モノポールアンテナ１９１２の水平面における水平偏波成分の指向性放射パターンを示した図である。 FIG. 8A is a diagram showing a directional radiation pattern of a vertically polarized component in the horizontal plane of the monopole antenna 191. FIG. FIG. 8B is a diagram illustrating a directional radiation pattern of a horizontally polarized wave component on the horizontal plane of the dipole antenna 192. FIG. 8C is a diagram showing a directional radiation pattern of a horizontal polarization component in the horizontal plane of the monopole antenna 1911. FIG. 8D is a diagram showing a directional radiation pattern of a horizontal polarization component in the horizontal plane of the monopole antenna 1912.
　モノポールアンテナ１９１１、１９１２は、水平面に平行性を保ちながら、左右に向きを振ると、図８Ｃ、図８Ｄに示すように、指向性放射パターンは左右に回転する。なお、モノポールアンテナ１９１１、１９１２を上下に振った場合は、水平面の指向性放射パターンはほぼそのままに、垂直偏波成分をこれらのアンテナでも受信することができるようになる。また、ダイポールアンテナ１９２を水平面に平行性を保ちながら、左右に向きを振ると、図８Ｂに示すように、指向性放射パターンは左右に回転する。なお、同様に、ダイポールアンテナ１９２のエレメントを上方ないしは下方に振った場合は、水平面の指向性放射パターンはほぼそのままに、垂直偏波成分をこれらのアンテナでも受信することができるようになる。 When the monopole antennas 1911 and 1912 are turned to the left and right while keeping parallel to the horizontal plane, the directional radiation pattern rotates to the left and right as shown in FIGS. 8C and 8D. When the monopole antennas 1911 and 1912 are swung up and down, the vertical polarization component can be received by these antennas while the directional radiation pattern on the horizontal plane is substantially unchanged. Further, when the dipole antenna 192 is turned to the left and right while keeping parallel to the horizontal plane, the directional radiation pattern rotates to the left and right as shown in FIG. 8B. Similarly, when the element of the dipole antenna 192 is swung upward or downward, a vertical polarization component can be received by these antennas with the directional radiation pattern on the horizontal plane substantially unchanged.
　上記したように、本実施の形態のテレビ受信装置３２０は、２つ以上の水平偏波用アンテナの内の少なくとも１つ以上のアンテナが方向を可動できることに特徴がある。 As described above, the television receiver 320 of this embodiment is characterized in that at least one of the two or more horizontally polarized antennas can move the direction.
　図９は、図８Ａ、図８Ｂ、図８Ｃ、図８Ｄに示した各アンテナの水平面における指向性放射パターンを重ね合わせた水平面における指向性放射パターンを示した図である。一般にテレビ放送においては、水平偏波にて送信されることが多い。したがって、この場合、２本のモノポールアンテナ１９１１、１９１２は、垂直に配置されたモノポールアンテナ１９１と直交性を保ち、水平面に対して平行に配置されるのが好ましい。なお、ダイポールアンテナ１９２に対しても直交性を保って２本配置しても良いが、水平偏波成分に関して実線で示したように、モノポールアンテナ１９１１、１９１２をダイポールアンテナ１９２に対して水平面内、直交方向の左右に３０°程度振ることが好ましい。その結果、ダイポールアンテナ１９２の８の字の放射パターンと合せて、水平偏波成分に関して、より万遍無くどの方向からの信号も効率的に受信するようにできる。 FIG. 9 is a diagram showing a directional radiation pattern in the horizontal plane obtained by superimposing the directional radiation patterns in the horizontal plane of each antenna shown in FIGS. 8A, 8B, 8C, and 8D. In general, television broadcasting is often transmitted with horizontal polarization. Therefore, in this case, the two monopole antennas 1911 and 1912 are preferably arranged in parallel to the horizontal plane while maintaining orthogonality with the monopole antenna 191 arranged vertically. Two dipole antennas 192 may be arranged while maintaining orthogonality, but the monopole antennas 1911 and 1912 are arranged in a horizontal plane with respect to the dipole antenna 192 as indicated by a solid line with respect to the horizontal polarization component. It is preferable to swing about 30 ° left and right in the orthogonal direction. As a result, in combination with the figure 8 radiation pattern of the dipole antenna 192, the signal from any direction can be efficiently received with respect to the horizontal polarization component more uniformly.
　一部の放送局においては、垂直偏波にて送信されることがある。この場合に対応するためには、垂直偏波成分に関しては、点線で示したように、モノポールアンテナ１９１の円形放射パターンに加え、今度は、モノポールアンテナ１９１１、１９１２のどちらか片方ないしは両方をダイポールアンテナ１９２と直交を保ちながら上下に振ることが好ましい。さらには、ダイポールアンテナ１９２のエレメントを上方ないしは下方に振っても良い。その結果、垂直偏波成分をこれらのアンテナでも受信することができ、より垂直偏波成分を受信するようにできる。 * Some broadcast stations may transmit in vertically polarized waves. In order to cope with this case, regarding the vertically polarized wave component, in addition to the circular radiation pattern of the monopole antenna 191, as shown by the dotted line, this time, either one or both of the monopole antennas 1911 and 1912 are used. It is preferable to shake the dipole antenna 192 up and down while maintaining orthogonality. Further, the element of the dipole antenna 192 may be swung upward or downward. As a result, vertical polarization components can be received by these antennas, and more vertical polarization components can be received.
　また、アンテナ部１９１０を構成するアンテナの内の１つ以上のアンテナを可動にすることには、以下の利点がある。すなわち、シャーシ本体１０２そのものは動かさずして、可動できるアンテナ、すなわち、図７の例では、モノポールアンテナ１９１１あるいはモノポールアンテナ１９１２を動かすことで、垂直偏波および水平偏波、指向性放射パターンの各アンテナでの分担を変えることができる。その結果、ぎりぎりの受信感度場所において、たまたま受信しづらい場所にテレビ受信装置３２０を置いたとしても、受信可能状態を探し出せる利点が生まれる。なお、窓等からの直接の受信波が反射散乱波に比して有意で、電波の到来方向が万遍でなく少々偏りを生じている場合にも、モノポールアンテナ１９１１，１９１２、ダイポールアンテナ１９２の内、少なくとも１つ以上が可動できることで、意図的に各々の指向性放射パターンを重ね合わせることで、ぎりぎりの受信感度場所において、たまたま受信しづらい場所にテレビ受信装置３２０を置いたとしても、受信可能状態を探し出せる利点が生まれる。 Further, making at least one of the antennas constituting the antenna unit 1910 movable has the following advantages. That is, the chassis body 102 itself does not move, and the movable antenna, that is, the monopole antenna 1911 or the monopole antenna 1912 in the example of FIG. The sharing of each antenna can be changed. As a result, even if the television receiver 320 is placed in a place where it is difficult to receive in the place where the reception sensitivity is at the limit, there is an advantage that the reception possible state can be found. The monopole antennas 1911 and 1912 and the dipole antenna 192 are also used when the direct reception wave from the window or the like is significant as compared with the reflected scattered wave and the arrival direction of the radio wave is not universal and is slightly biased. Even if the television receiver 320 is placed in a place where it is difficult to receive in the place where it is difficult to receive, it is possible to move at least one of the directional radiation patterns intentionally. The advantage of being able to find out the reception status is born.
　図１０は、本発明の実施の形態２におけるテレビ受信装置３２０の回路構成を示すブロック図である。実施の形態１の図４に比べ、合成部１２０の前の系統数が増えるだけで、全く同様であるので説明を省略する。合成部１２０の内部構成図に関しても、実施の形態１の図５あるいは図６の加算合成部１２７の前の系統数が増えるだけで、全く同様なので、構成図および説明を省略する。なお、アンテナ数、すなわち、系統数は、任意に増やすことができ、アンテナ部１９０を構成する各アンテナの偏波成分および指向特性のカバー範囲が、適度な重なりを有しつつも、万遍無く分散分担することで、数の増大と共に、より良いテレビ視聴が期待できる。 FIG. 10 is a block diagram showing a circuit configuration of the television receiver 320 according to Embodiment 2 of the present invention. Compared to FIG. 4 of the first embodiment, only the number of systems before the combining unit 120 is increased, and the description is omitted because it is exactly the same. The internal configuration diagram of the combining unit 120 is exactly the same as the number of systems before the addition combining unit 127 of FIG. 5 or FIG. Note that the number of antennas, that is, the number of systems can be increased arbitrarily, and the coverage of the polarization component and the directivity of each antenna constituting the antenna unit 190 has a reasonable overlap, but is universal. By sharing the distribution, better television viewing can be expected as the number increases.
　かかる構成によれば、本実施の形態においては、アンテナ数を増やし、放送局の水平偏波か垂直偏波かの送信波に合わせて、一部のアンテナを水平あるいは垂直方向に可動にすることで、垂直偏波および水平偏波、水平面のいずれの方向からの到来波も、より効率よく利用し合成することができる。したがって、テレビ受信装置３２０における受信信号の信号対雑音比をさらに高めることができ、屋内または室内受信において、置いた場所で最大限の受信感度を得て、より良好なテレビ視聴を行うことができる。加えて、可動アンテナを動かすことで、本体は好みの場所そのままで動かさずして、垂直偏波および水平偏波、指向性放射パターンの各アンテナでの分担を変えて、ぎりぎりの受信条件場所での受信可能状態を探し出せる利点が生まれる。 According to such a configuration, in the present embodiment, the number of antennas is increased, and some antennas are movable in the horizontal or vertical direction according to the transmission wave of the horizontal polarization or the vertical polarization of the broadcasting station. Thus, incoming waves from any direction of vertical polarization, horizontal polarization, and horizontal plane can be used and synthesized more efficiently. Therefore, the signal-to-noise ratio of the received signal in the television receiver 320 can be further increased, and in indoor or indoor reception, the maximum reception sensitivity can be obtained at a place where the television receiver 320 is placed, and better television viewing can be performed. . In addition, by moving the movable antenna, the main body does not move as it is in the preferred location, and the sharing of vertical polarized waves, horizontal polarized waves, and directional radiation patterns with each antenna is changed. The advantage of being able to find out the reception status of is born.
　なお、それぞれのアンテナの直交関係を保ち、かつ、垂直偏波、水平偏波、水平面のいずれの方向もカバーできる最小の３個より、アンテナの個数を増やすことで、冗長を活かして上記した利点が生まれるが、可動できるアンテナは、１つ以上すべてまで、また、どのアンテナを可動にしても良い。アンテナの種別もさらに色々な種類のアンテナの適用が可能である。以下では、いくつか例と利点を示す。 In addition, the above-mentioned advantages are achieved by taking advantage of redundancy by increasing the number of antennas from the minimum of three that can maintain the orthogonal relationship of each antenna and cover all directions of vertical polarization, horizontal polarization, and horizontal plane. However, up to one or more movable antennas and any antenna may be movable. Various types of antennas can also be applied. Below are some examples and benefits.
　図１１は、本発明の実施の形態２における他の１例のテレビ受信装置３２１のアンテナ構成を示す概念図である。図１１に示すように、テレビ受信装置３２１は、ホイップアンテナ１９４１、１９４２を有している。ホイップアンテナ１９４１、１９４２は、エレメント長を３／４波長等より長くすることで受信性能を高めると共に、柔軟性のある材料を用いることで可動性も実現しやすい。エレメント長を長くしたホイップアンテナ１９４１、１９４２のアンテナ放射パターンは、上下方向では抑圧されるが、一方、水平面での水平偏波の感度が良くなる。さらに、下方向に伸ばされていることより垂直偏波に対しても感度を有する。 FIG. 11 is a conceptual diagram showing an antenna configuration of another example of the television receiver 321 according to Embodiment 2 of the present invention. As shown in FIG. 11, the television receiver 321 includes whip antennas 1941 and 1942. Whip antennas 1941 and 1942 improve the reception performance by making the element length longer than 3/4 wavelength or the like, and are easy to realize mobility by using a flexible material. The antenna radiation patterns of whip antennas 1941 and 1942 with longer element lengths are suppressed in the vertical direction, but on the other hand, the sensitivity of horizontal polarization in the horizontal plane is improved. Furthermore, since it extends downward, it has sensitivity to vertical polarization.
　図１２は、本発明の実施の形態２における他の１例のテレビ受信装置３２２のアンテナ構成を示す概念図である。図１２に示すように、テレビ受信装置３２２は、スリーブアンテナ１９３１、１９３２を有している。スリーブアンテナ１９３１、１９３２は、モノポールやホイップ等とは異なり、シャーシをグランドとして使用しない。したがって、シャーシ本体１０２に直接取り付けたアンテナで問題となりやすい、本体回路から種々発生する雑音信号を受信しにくい。その結果、より感度の良いテレビ受信装置３２２を実現しやすい利点を有する。 FIG. 12 is a conceptual diagram showing an antenna configuration of another example of television receiver 322 according to Embodiment 2 of the present invention. As illustrated in FIG. 12, the television receiver 322 includes sleeve antennas 1931 and 1932. The sleeve antennas 1931 and 1932 do not use the chassis as a ground, unlike a monopole or a whip. Therefore, it is difficult to receive various noise signals generated from the main circuit, which is likely to be a problem with the antenna directly attached to the chassis main body 102. As a result, there is an advantage that it is easy to realize a television receiver 322 with higher sensitivity.
　図１３は、本発明の実施の形態２における他の１例のテレビ受信装置３２３のアンテナ構成を示す概念図である。図１３に示すように、テレビ受信装置３２３は、シャーシ本体１０２の左右の両端部にそれぞれダイポールアンテナ１９２１、１９２２を有している。ダイポールアンテナ１９２１、１９２２は、シャーシをグランドとして使用しない平衡型のアンテナを用いることで、シャーシ本体１０２に直接取り付けたアンテナで問題となりやすい、本体回路から種々発生する雑音信号を受信しにくい。その結果、より感度の良いテレビ受信装置３２３を実現しやすい利点を生ずる。 FIG. 13 is a conceptual diagram showing an antenna configuration of another example of the television receiver 323 according to Embodiment 2 of the present invention. As shown in FIG. 13, the television receiver 323 includes dipole antennas 1921 and 1922 at the left and right ends of the chassis main body 102, respectively. Since the dipole antennas 1921 and 1922 are balanced antennas that do not use the chassis as a ground, it is difficult to receive various noise signals generated from the body circuit, which are likely to cause problems with antennas directly attached to the chassis body 102. As a result, there is an advantage that it is easy to realize a television receiver 323 with higher sensitivity.
　図１４は、本発明の実施の形態２における他の１例のテレビ受信装置３２４のアンテナ構成を示す概念図である。図１４に示すように、テレビ受信装置３２４は、ダイポールアンテナ１９２１、１９２２をシャーシ本体１０２の上方、両肩部分に取り付けることで、本体回路から種々発生する雑音信号をより受信しにくい。その結果、さらに感度の良いテレビ受信装置３２４を実現しやすい利点を生ずる。 FIG. 14 is a conceptual diagram showing an antenna configuration of another example of television receiver 324 according to Embodiment 2 of the present invention. As shown in FIG. 14, the television receiver 324 is less likely to receive various noise signals generated from the main circuit by attaching the dipole antennas 1921 and 1922 to the upper and both shoulders of the chassis main body 102. As a result, there is an advantage that it is easy to realize the television receiver 324 having higher sensitivity.
　図１５は、本発明の実施の形態２における他の１例のテレビ受信装置３２５のアンテナ構成を示す概念図である。図１５に示すように、テレビ受信装置３２５は、Ｖ型ダイポールアンテナ１９５１、１９５２を有している。テレビ受信装置３２５は、Ｖ型ダイポールアンテナ１９５１、１９５２を変形したＶ型ダイポールとすることで、ノイズを受信しにくくする利点を有する。さらに、それに加えて、テレビ受信装置３２５は、指向特性を左右のＶ型ダイポールアンテナ１９５１、１９５２で振り分け、シャーシ本体１０２の外側方向へ指向性を振ってもよい。このようにすることで、さらに感度の良いテレビ受信装置３２５を実現できる利点を生ずる。 FIG. 15 is a conceptual diagram showing an antenna configuration of another example of television receiver 325 according to Embodiment 2 of the present invention. As shown in FIG. 15, the television receiver 325 includes V- type dipole antennas 1951 and 1952. The television receiver 325 has an advantage of making it difficult to receive noise by changing the V- type dipole antennas 1951 and 1952 into modified V-type dipoles. In addition to that, the television receiver 325 may distribute directivity between the left and right V-shaped dipole antennas 1951 and 1952, and may direct the directivity toward the outside of the chassis main body 102. By doing so, there is an advantage that a more sensitive television receiver 325 can be realized.
　図１６は、本発明の実施の形態２における他の１例のテレビ受信装置３２６のアンテナ構成を示す概念図である。図１６に示すように、テレビ受信装置３２６は、円形ループアンテナ１９６１、１９６２を有している。テレビ受信装置３２６は、シャーシをグランドとして使用しない平衡型のアンテナである円形ループアンテナ１９６１、１９６２を、シャーシ本体１０２のより高い位置に設けることで、本体回路から種々発生する雑音信号をより受信しにくくできる。したがって、感度の良いテレビ受信装置３２６を実現しやすい利点を生ずる。 FIG. 16 is a conceptual diagram showing an antenna configuration of another example of television receiver 326 according to Embodiment 2 of the present invention. As illustrated in FIG. 16, the television receiver 326 includes circular loop antennas 1961 and 1962. The television receiver 326 receives more various noise signals generated from the main body circuit by providing circular loop antennas 1961 and 1962 that are balanced antennas that do not use the chassis as a ground at a higher position of the chassis main body 102. It can be difficult. Therefore, there is an advantage that the television receiver 326 having high sensitivity can be easily realized.
　図１７は、本発明の実施の形態２における他の１例のテレビ受信装置３２７のアンテナ構成を示す概念図である。図１７に示すように、テレビ受信装置３２７は、矩形ループアンテナ１９７１、１９７２を有している。テレビ受信装置３２７は、矩形ループアンテナ１９７１、１９７２が雑音に強い平衡型アンテナであることに加え、ユーザ使用上および美観上の難点となる、後方および上方への張り出しを少なく抑えることができる利点を生じる。 FIG. 17 is a conceptual diagram showing an antenna configuration of another example of the television receiver 327 according to Embodiment 2 of the present invention. As illustrated in FIG. 17, the television receiver 327 includes rectangular loop antennas 1971 and 1972. The television receiver 327 has advantages that the rectangular loop antennas 1971 and 1972 are balanced antennas that are resistant to noise, and that the protrusions to the rear and upward, which are difficult for users and aesthetics, can be reduced. Arise.
　図１８は、本発明の実施の形態２における他の１例のテレビ受信装置３２８のアンテナ構成を示す概念図である。図１７に示すように、矩形ループアンテナ１９７１、１９７２の給電点を下方に取るより、図１８に示すように、矩形ループアンテナ１９７１、１９７２の給電点を上方に取ることで、アンテナ端子を互いに近い配置にできる。また、このような配置により電流分布の腹となる給電点を高い位置にすることができるので、より高い信号対雑音比を得る上で有利となる。矩形ループアンテナ１９７１、１９７２は、全長がほぼ波長λの線状エレメントで構成され、矩形ループ面の垂直方向に放射パターンをもち、矩形の長辺方向が上下であるために、上下方向の受信感度が抑圧される。しかし、矩形ループアンテナ１９７１、１９７２を用いることにより、水平面の水平偏波の感度は良好であるという利点が生じる。 FIG. 18 is a conceptual diagram showing an antenna configuration of another example of television receiver 328 according to Embodiment 2 of the present invention. As shown in FIG. 17, the antenna terminals are closer to each other by taking the feed points of the rectangular loop antennas 1971 and 1972 upward as shown in FIG. 18 than taking the feed points of the rectangular loop antennas 1971 and 1972 downward. Can be placed. In addition, this arrangement makes it possible to place a feeding point that becomes an antinode of current distribution at a high position, which is advantageous in obtaining a higher signal-to-noise ratio. The rectangular loop antennas 1971 and 1972 are composed of linear elements having an overall length of approximately wavelength λ, have a radiation pattern in the vertical direction of the rectangular loop surface, and the long side of the rectangle is up and down. Is suppressed. However, by using the rectangular loop antennas 1971 and 1972, there is an advantage that the sensitivity of horizontal polarization in the horizontal plane is good.
　図１９は、本発明の実施の形態２における他の１例のテレビ受信装置３２９のアンテナ構成を示す概念図である。図１９に示すように、テレビ受信装置３２９は、オフセットダイポールアンテナ１９２３を有している。オフセットダイポールアンテナ１９２３は、図１５における上部のダイポールアンテナ１９２の給電位置を変形した構成を有し、水平偏波の指向性は通常のダイポールと同じである。また、オフセットダイポールアンテナ１９２３の給電位置がモノポールアンテナ１９１と大きく離れることで、ダイポールの平行給電線とモノポールアンテナ１９１との干渉がなくなり円形の指向性が保たれる。さらに、図１５のテレビ受信装置３２５ではダイポールアンテナ１９２の給電位置とモノポールアンテナ１９１の給電位置は同一線上である制約があった。しかし、テレビ受信装置３２９ではシャーシ本体１０２の上部における給電位置の選択に自由度を与えることの利点を生ずる。 FIG. 19 is a conceptual diagram showing an antenna configuration of another example of television receiver 329 according to Embodiment 2 of the present invention. As illustrated in FIG. 19, the television receiver 329 includes an offset dipole antenna 1923. The offset dipole antenna 1923 has a configuration in which the feeding position of the upper dipole antenna 192 in FIG. 15 is modified, and the directivity of horizontal polarization is the same as that of a normal dipole. Further, since the feeding position of the offset dipole antenna 1923 is greatly separated from the monopole antenna 191, interference between the parallel feed line of the dipole and the monopole antenna 191 is eliminated, and the circular directivity is maintained. Further, in the television receiver 325 of FIG. 15, there is a restriction that the feeding position of the dipole antenna 192 and the feeding position of the monopole antenna 191 are on the same line. However, the television receiver 329 has an advantage of giving a degree of freedom to the selection of the feeding position in the upper part of the chassis main body 102.
　図２０は、本発明の実施の形態２における他の１例のテレビ受信装置３３０のアンテナ構成を示す概念図である。図２０に示すように、テレビ受信装置３３０は、Ｌ字型モノポールアンテナ１９１３を有している。Ｌ字型モノポールアンテナ１９１３は、シャーシ本体１０２の上端部に沿って先端を開放とし、給電部近傍で折り曲げてＬ字型に形成された線状アンテナである。そして、Ｌ字型モノポールアンテナ１９１３は、シャーシ本体１０２と線状部に発生する垂直偏波を受信することができ、その指向性は概ね円形である。また、Ｌ字型モノポールアンテナ１９１３は、ダイポールアンテナ１９２と線状部が平行しているため干渉することが少ない。さらに、Ｌ字型モノポールアンテナ１９１３を用いることにより、シャーシ本体１０２の上部における給電位置の選択に自由度を与えることの利点を生ずる。 FIG. 20 is a conceptual diagram showing an antenna configuration of another example of the television receiver 330 according to Embodiment 2 of the present invention. As shown in FIG. 20, the television receiver 330 has an L-shaped monopole antenna 1913. The L-shaped monopole antenna 1913 is a linear antenna that is formed in an L-shape by opening the tip along the upper end portion of the chassis main body 102 and bending it near the feeding portion. The L-shaped monopole antenna 1913 can receive vertically polarized waves generated in the chassis main body 102 and the linear portion, and its directivity is substantially circular. In addition, the L-shaped monopole antenna 1913 is less likely to interfere with the dipole antenna 192 because the linear portions are parallel to each other. Further, by using the L-shaped monopole antenna 1913, there is an advantage that a degree of freedom is given to selection of a feeding position in the upper part of the chassis main body 102.
　（実施の形態３）
　図２１は、本発明の実施の形態３におけるテレビ受信装置３３１のアンテナ構成を示す概念図である。 (Embodiment 3)
FIG. 21 is a conceptual diagram showing an antenna configuration of television receiving apparatus 331 according to Embodiment 3 of the present invention.
　図２１に示すように、テレビ受信装置３３１は、アンテナ切替部１７０、外部アンテナ接続端子１８０を備えている。外部アンテナ接続端子１８０は、アンテナケーブル２００を介して、室外アンテナ２１０、または室内アンテナ２２０を接続できる。アンテナ切替部１７０は、外部アンテナ接続端子１８０とシャーシ本体１０２に取り付けられたアンテナの内のいずれかのアンテナとを切替えることができる。 As shown in FIG. 21, the television receiver 331 includes an antenna switching unit 170 and an external antenna connection terminal 180. The external antenna connection terminal 180 can connect the outdoor antenna 210 or the indoor antenna 220 through the antenna cable 200. The antenna switching unit 170 can switch between the external antenna connection terminal 180 and any one of the antennas attached to the chassis main body 102.
　本実施の形態が、実施の形態２と異なるのは、アンテナ切替部１７０を設けて、１つの系統（ここではモノポールアンテナ１９１１）の代わりに、外部アンテナ接続端子１８０、およびアンテナケーブル２００を介して壁面アンテナ端子２０５に接続された室外アンテナ２１０に接続できることである。また、アンテナケーブル２００は、室内アンテナ２２０に接続できる。その他は実施の形態１、２にて説明と同様なので省略する。 The present embodiment is different from the second embodiment in that an antenna switching unit 170 is provided and an external antenna connection terminal 180 and an antenna cable 200 are used instead of one system (here, the monopole antenna 1911). Thus, the outdoor antenna 210 connected to the wall antenna terminal 205 can be connected. The antenna cable 200 can be connected to the indoor antenna 220. Others are the same as those described in the first and second embodiments, and thus will be omitted.
　かかる構成により、実施の形態１、２に加えて、本実施の形態においては、アンテナ切替部１７０を設けて、１つの系統の代わりに、外部アンテナを接続できるようにしている。したがって、近くに壁面アンテナ端子２０５がある場合や傍に室内アンテナ２２０を追加することで、実施の形態１で説明したように、直交配置である３本のアンテナで、垂直・水平偏波、水平面内全周の到来波電力を活かした上に、さらに、追加アンテナの信号を足し合わせることができる。その結果、受信信号の信号対雑音比をさらに高めて、より良好で安定なテレビ視聴を行うことができる。 With this configuration, in addition to the first and second embodiments, in this embodiment, an antenna switching unit 170 is provided so that an external antenna can be connected instead of one system. Therefore, when there is the wall antenna terminal 205 near or by adding the indoor antenna 220 near, the three antennas that are orthogonally arranged, as described in the first embodiment, the vertical / horizontal polarization, horizontal plane In addition to taking advantage of the incoming wave power around the inner circumference, the signals of the additional antennas can be added together. As a result, the signal-to-noise ratio of the received signal can be further increased, and better and more stable TV viewing can be performed.
　本発明にかかるテレビ受信装置は、屋内または室内の乱反射環境にて、アンテナ付きテレビ受信装置を無造作にどこに置いても、垂直偏波および水平偏波、水平面のいずれの方向からの到来波も利用し合成することで、受信信号の信号対雑音比を積極的に高めることができる。その結果、より良好で安定したテレビ視聴を行えるので、屋内または室内用でフリースタイルに視聴するテレビ受信装置等として有用である。 The television receiver according to the present invention uses an incoming wave from any direction of a vertically polarized wave, a horizontally polarized wave, and a horizontal plane, regardless of where the antenna-equipped television receiver is placed at random in an indoor or indoor diffuse reflection environment. By combining them, the signal-to-noise ratio of the received signal can be positively increased. As a result, it is possible to perform better and more stable television viewing, which is useful as a television receiving device for viewing indoors or indoors in a free style.
　１００，３２０，３２１，３２２，３２３，３２４，３２５，３２６，３２７，３２８，３２９，３３０，３３１　　テレビ受信装置
　１０２　　シャーシ本体
　１０３　　支持部
　１１１，１１２，１１３　　低雑音増幅器
　１２０　　合成部
　１２１１，１２１２，１２１３　　フロントエンド部
　１２２１，１２２２，１２２３　　アナログデジタル（Ａ／Ｄ）変換部
　１２３１，１２３２，１２３３　　ガードインターバル（ＧＩ）除去周波数制御部
　１２４１，１２４２，１２４３　　高速フーリエ変換（ＦＦＴ）部
　１２５１，１２５２，１２５３　　パイロット抽出伝送路推定部
　１２６１，１２６２，１２６３　　位相補正重み付け部
　１２７　　加算合成部
　１３０　　復調誤り訂正部
　１４０　　映像音声復号部
　１５０　　表示部
　１６０　　スピーカ部
　１７０　　アンテナ切替部
　１８０　　外部アンテナ接続端子
　１９０，１９１０　　アンテナ部
　１９１，１９１１，１９１２　　モノポールアンテナ
　１９１３　　Ｌ字型モノポールアンテナ
　１９２，１９２１，１９２２　　ダイポールアンテナ
　１９２３　　オフセットダイポールアンテナ
　１９３，１９３１，１９３２　　スリーブアンテナ
　１９４１，１９４２　　ホイップアンテナ
　１９５１，１９５２　　Ｖ型ダイポールアンテナ
　１９６１，１９６２　　円形ループアンテナ
　１９７１，１９７２　　矩形ループアンテナ
　２００　　アンテナケーブル
　２０５　　壁面アンテナ端子
　２１０　　室外アンテナ
　２２０　　室内アンテナ 100, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 330, 331 TV receiver 102 Chassis body 103 Support section 111, 112, 113 Low noise amplifier 120 Combining section 1211, 1212, 1213 Front end section 1221, 1222, 1223 Analog digital (A / D) conversion section 1231, 1232, 1233 Guard interval (GI) removal frequency control section 1241, 1242, 1243 Fast Fourier transform (FFT) section 1251, 1252, 1253 Pilot extraction Transmission path estimation unit 1261, 1262, 1263 Phase correction weighting unit 127 Addition synthesis unit 130 Demodulation error correction unit 140 Video / audio decoding unit 150 Display unit 160 Speaker unit 170 Antenna switching unit 180 External antenna connection terminal 190, 1910 Antenna part 191, 1911, 1912 Monopole antenna 1913 L-shaped monopole antenna 192, 1921, 1922 Dipole antenna 1923 Offset dipole antenna 193, 1931, 1932 Sleeve antenna 1941, 1942 Whip antenna 1951, 1952 V-shaped dipole antenna 1961, 1962 Circular loop antenna 1971, 1972 Rectangular loop antenna 200 Antenna cable 205 Wall antenna terminal 210 Outdoor antenna 220 Indoor antenna

Claims (5)

  1. 所定方向の偏波を送信する放送局からの放送波を屋内または室内にて受信するテレビ受信装置であって、
    前記テレビ受信装置は、
    シャーシ本体と、
    前記シャーシ本体に取り付けられた水平方向の偏波を受信する２つ以上の水平偏波用アンテナと、
    前記シャーシ本体に取り付けられた垂直方向の偏波を受信する１つ以上の垂直偏波用アンテナと、
    ２つ以上の前記水平偏波用アンテナと１つ以上の前記垂直偏波用アンテナが受信した３つ以上の信号を搬送波位相が重なるように位相調整し、重み付けを行って合成する合成部と、
    前記合成部が合成した信号を復調する復調誤り訂正部と、を備え、
    ２つ以上の前記水平偏波用アンテナは、互いに指向性放射パターンが補完関係になるように配置されているテレビ受信装置。     A television receiver that receives a broadcast wave from a broadcast station that transmits polarized waves in a predetermined direction, indoors or indoors,
    The television receiver is
    The chassis body,
    Two or more horizontally polarized antennas attached to the chassis body for receiving horizontally polarized waves;
    One or more vertically polarized antennas attached to the chassis body for receiving vertically polarized waves;
    A synthesizing unit that adjusts the phase so that carrier wave phases overlap each other and three or more signals received by two or more horizontally polarized antennas and one or more vertically polarized antennas, and performs weighting to synthesize;
    A demodulation error correction unit that demodulates the signal synthesized by the synthesis unit, and
    The two or more horizontally polarized antennas are television receivers arranged so that directional radiation patterns are complementary to each other.
  2. 前記水平偏波用アンテナは２つで構成され、
    前記垂直偏波用アンテナは１つで構成され、
    ２つの前記水平偏波用アンテナと１つの前記垂直偏波用アンテナとがすべて互いに直交する配置となっている請求項１に記載のテレビ受信装置。     The horizontally polarized antenna is composed of two,
    The vertically polarized antenna is composed of one,
    2. The television receiver according to claim 1, wherein the two horizontally polarized antennas and the one vertically polarized antenna are all arranged orthogonal to each other.
  3. ２つ以上の前記水平偏波用アンテナの内の少なくとも１つ以上のアンテナが方向を可動できる請求項１に記載のテレビ受信装置。 The television receiver according to claim 1, wherein at least one of the two or more horizontally polarized antennas is movable in direction.
  4. 室外アンテナ、または室内アンテナを接続する外部アンテナ接続端子と、
    前記外部アンテナ接続端子と前記シャーシ本体に取り付けられたアンテナの内のいずれかのアンテナとを切替えるアンテナ切替部と、
    をさらに備える請求項１に記載のテレビ受信装置。     An outdoor antenna or an external antenna connection terminal for connecting an indoor antenna;
    An antenna switching unit for switching between the external antenna connection terminal and any one of the antennas attached to the chassis body;
    The television receiver according to claim 1, further comprising:
  5. 前記合成部が最大比合成を行うことを特徴とする請求項１に記載のテレビ受信装置。 The television receiver according to claim 1, wherein the combining unit performs maximum ratio combining.
PCT/JP2010/000354 2009-02-18 2010-01-22 Television receiver WO2010095356A1 (en)

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