WO2013111584A1 - Circuit sans fil et système de commande d'éclairage - Google Patents

Circuit sans fil et système de commande d'éclairage Download PDF

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Publication number
WO2013111584A1
WO2013111584A1 PCT/JP2013/000320 JP2013000320W WO2013111584A1 WO 2013111584 A1 WO2013111584 A1 WO 2013111584A1 JP 2013000320 W JP2013000320 W JP 2013000320W WO 2013111584 A1 WO2013111584 A1 WO 2013111584A1
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WO
WIPO (PCT)
Prior art keywords
signal
frequency
image component
unit
intermediate frequency
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PCT/JP2013/000320
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English (en)
Japanese (ja)
Inventor
充 田邊
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パナソニック株式会社
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Publication of WO2013111584A1 publication Critical patent/WO2013111584A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion

Definitions

  • the present invention relates to wireless communication, particularly to a technique for generating a signal having a specific frequency.
  • a direct quadrature modulation system or a VCO (Voltage Controlled Oscillator) direct modulation system.
  • VCO Voltage Controlled Oscillator
  • a modulator In direct quadrature modulation, a modulator generates an I (In-phase) signal (in-phase signal) and a Q (Quadrature) signal (orthogonal signal) that is 90 degrees out of phase with the I signal.
  • An analog conversion circuit (DAC: Digital to Analog Converter) converts a digital signal into an analog signal and removes unnecessary components to perform orthogonal conversion.
  • DAC Digital to Analog Converter
  • a high-frequency signal for each signal is generated by a synthesizer including a PLL (Phase-locked loop) and a VCO.
  • FIG. 12 shows a radio circuit 2000 using the VCO direct modulation method.
  • an I signal is generated by the modulator 2001.
  • a synthesizer 2002 having a PLL 2010 and a VCO 2011 converts the generated I signal into a high-frequency signal, and then the signal level is amplified by a power amplifier (PA) 2003 and a low-pass filter (LPF) 2004, and unnecessary noise is generated. Is removed and transmission is performed (see Patent Document 1).
  • PA power amplifier
  • LPF low-pass filter
  • a synthesizer is necessary.
  • the area occupied by the synthesizer in the radio circuit is very large.
  • the ratio of the synthesizer 2002 in the radio circuit 2000 is as shown in FIG. Therefore, it is a major obstacle to miniaturization of the radio circuit.
  • an object of the present invention is to provide a radio circuit and an illumination control system that can generate a signal to be transmitted without using a synthesizer and can be miniaturized.
  • the present invention provides a radio circuit, a signal generation unit that generates a modulation signal from a signal indicating data to be transmitted, and a frequency conversion that converts the frequency of the modulation signal into an intermediate frequency.
  • a signal conversion unit that converts the modulated signal converted to the intermediate frequency into an analog signal, and a frequency that is an integer multiple of the sampling frequency of the signal conversion unit when the signal conversion unit performs the conversion.
  • a filter for filtering an image component belonging to a specific high frequency band
  • a signal amplifying unit for amplifying the image component filtered by the filter
  • the signal amplifying unit And a transmitter for transmitting the image component amplified in step (a).
  • the frequency of the image component belonging to the specific high frequency band is a first frequency
  • the intermediate frequency is an integer multiple of the first frequency and the sampling frequency and is the closest to the first frequency. It may be a difference value from two frequencies.
  • the image component belonging to the specific high frequency band is in an inverse phase relationship with the phase of the modulation signal converted to the intermediate frequency
  • the radio circuit further includes the conversion by the signal conversion unit.
  • a phase inverting unit for inverting the phase of the modulated signal converted to the intermediate frequency may be provided.
  • the wireless circuit prior to the conversion by the signal conversion unit, the wireless circuit further complements the image component so that amplitude distortion for the image component belonging to the specific high frequency band becomes flat. It is good also as providing the complement part to give.
  • the wireless circuit may be provided in a wireless transceiver that performs wireless communication.
  • this invention is an illumination control system which consists of one or more lighting fixtures and the control apparatus which controls the said one or more lighting fixtures by radio
  • the said control device is based on the control signal which concerns on control of a lighting fixture.
  • a signal generation unit that generates a modulation signal, a frequency conversion unit that converts the frequency of the modulation signal into an intermediate frequency, a signal conversion unit that converts the modulation signal converted into the intermediate frequency into an analog signal, and the signal Filtering out image components belonging to a specific high frequency band from among image components appearing above and below the frequency every integer multiple of the sampling frequency of the signal conversion unit at the time of the conversion by the conversion unit.
  • a filter for amplifying the image component filtered by the filter, and transmitting the image component amplified by the signal amplifying unit
  • Each of the one or more lighting fixtures receives the image component, demodulates the received image component to generate the control signal, and controls lighting based on the generated control signal It is characterized by performing.
  • the radio circuit since the radio circuit generates a signal to be transmitted using the image component, a synthesizer is not necessary. Therefore, the wireless circuit can be reduced in size.
  • FIG. 1 is a diagram illustrating a configuration of a radio circuit 1.
  • FIG. It is a figure explaining the Sinc function response in the analog signal output from DAC12. It is a figure explaining transition of a signal level.
  • 3 is a flowchart showing processing of the radio circuit 1. It is a figure explaining the amplitude and phase in a Sinc function response. It is a figure explaining the relationship between the phase of the signal of an intermediate frequency, and the phase of a 7th image component. It is a figure which shows the structure of the radio
  • 2 is a diagram illustrating a configuration of a transceiver 100.
  • FIG. 1000 It is a figure which shows the structure of the illumination control system 1000.
  • FIG. It is a figure which shows the structure of the radio
  • a radio circuit 1 generates and outputs a signal having a frequency to be used in radio communication without using a synthesizer.
  • the radio circuit 1 includes a modulator 10, a frequency converter 11, a digital-analog converter circuit (DAC: Digital to Analog Converter) 12, a band-pass filter (BPF: Band-pass filter) 13, and a signal amplifier.
  • the unit 14 includes a low-pass filter (LPF) 15 and an antenna 16.
  • Modulator 10 modulates a signal of data to be transmitted to generate a modulated signal that is a digital signal.
  • the modulator 10 modulates a signal of data to be transmitted to generate an I signal (in-phase signal) and a Q signal (quadrature signal) that is 90 degrees out of phase with the I signal.
  • a set of the I signal and the Q signal is referred to as a modulation signal.
  • the frequency conversion unit 11 converts the frequency of the modulation signal generated by the modulator 10 into an intermediate frequency, and includes an orthogonal conversion unit 21 and a ROM (Read Only Memory) table 22 as shown in FIG. is doing.
  • the ROM table 22 stores information for converting each frequency of the I signal and the Q signal into an intermediate frequency.
  • the orthogonal transform unit 21 transforms the modulation signal generated by the modulator 10 into an intermediate frequency based on the information stored in the ROM table 22. Specifically, the orthogonal transform unit 21 converts each frequency of the I signal and the Q signal generated by the modulator 10 based on the information in the ROM table 22 to an intermediate frequency, and converts the converted I to the intermediate frequency. By adding the signal and the Q signal, a waveform of a modulation signal at an intermediate frequency (IF) is obtained.
  • IF intermediate frequency
  • the modulation signal of the intermediate frequency is also called an IF signal.
  • the DAC 12 is a circuit that converts a digital signal, which is a modulation signal having an intermediate frequency obtained by the frequency conversion unit 11, into an analog signal based on the sampling frequency (fs: 50 MHz).
  • the sampling frequency (fs) is the frequency of an external crystal oscillator, and the DAC 12 operates at this frequency.
  • components called image components (folding components) other than the intermediate frequency component are included. Included in analog signal.
  • the horizontal axis indicates the frequency domain (f / fs), and the vertical axis indicates the signal gain (Gain).
  • f is a normal frequency
  • fs is a sampling frequency.
  • each of the plurality of image components is a different frequency component. Since the waveform of the analog signal output from the DAC 12 is a rectangular wave, the analog signal is output by an impulse response (hereinafter referred to as a Sinc function response) of a Sinc function (Sinc (f / fs)). . Therefore, conventionally, components other than the components of the signal band are removed as unnecessary components, and a signal having a frequency to be used in wireless communication by performing processing (amplification processing or the like) only on necessary frequency components ( (RF signal: RadioFrequency) is generated and transmitted. However, in the present embodiment, a frequency component to be used in wireless communication is acquired using the image component that is an unnecessary component, and a signal of the acquired frequency component, that is, an RF signal is output.
  • the image component is generated by multiplication (mixing) of the sampling frequency used in the DAC 12 and the input signal.
  • the input signal is a signal generated by the frequency converter 11, that is, an IF signal orthogonally transformed in the digital domain
  • the image component is a harmonic of m times the sampling frequency (m is an integer of 1 or more).
  • m is an integer of 1 or more.
  • the BPF 13 filters only a required frequency component among a plurality of frequency components in the analog signal output from the DAC 12.
  • a high frequency band from 429.8125 MHz to 429.9125 MHz is allocated as a usable band for wireless communication.
  • the sampling frequency when the sampling frequency is 50 MHz, the sampling frequency (450 MHz) that is nine times is a frequency close to the above frequency band. Then, the BPF 13 can obtain a signal having a frequency permitted for wireless communication by filtering the seventeenth image component among the plurality of image components shown in FIG.
  • the frequency of each image component will be different depending on the intermediate frequency. Therefore, it is necessary to determine the intermediate frequency so that the frequency of the seventeenth image component becomes a frequency permitted for wireless communication. For example, if the frequency to be used for transmission in the high frequency band from 429.8125 MHz to 429.9125 MHz, that is, the frequency of the 17th image component is 429.8125 MHz, the intermediate frequency is 9 times the sampling frequency (450 MHz). This is the difference from the 17th image component. This is because a signal in the transmission band (here, an intermediate frequency signal) and a plurality of image signals are symmetric with respect to a position (in this case, an integer multiple of the sample frequency) that becomes NULL due to a Sinc function response. This is because it exists in a position.
  • a signal in the transmission band here, an intermediate frequency signal
  • a plurality of image signals are symmetric with respect to a position (in this case, an integer multiple of the sample frequency) that becomes NULL due to a Sinc function response.
  • the signal amplifying unit 14 includes a driver amplifier (DRV) 23 and a power amplifier (PA) 24. Using these amplifiers, an analog signal having an image component obtained by the BPF 13 can be obtained. The transmission level is amplified to a predetermined level.
  • DVR driver amplifier
  • PA power amplifier
  • FIG. 3 shows the result of amplification of the signal level and noise level input to the DAC 12 by the signal amplification unit 14.
  • the signal level input to the DAC 12 is 4 dBm.
  • This signal is converted into an analog signal by the DAC 12, and the level of the seventeenth image component at the time of output is ⁇ 29 dBm, which is 33 dB lower than the level of the input signal due to the Sinc function response.
  • a quantization noise level which is a kind of noise level generated when converting to an analog signal, is theoretically able to realize about 50 dB SN (signal-noise ratio) if the bit resolution of the DAC 12 is 8 bits. 50 dBm lower than the signal level. Since the input signal level is 4 dBm, it is -46 dBm here.
  • This quantization noise level is also reduced by 33 dB due to the Sinc function response. That is, the level of quantization noise output from the DAC 12 is ⁇ 79 dBm.
  • the thermal noise level which is another noise level, is -134 dBm. This is 55 dB lower than the level of the 17th image component, and is negligible, not related to the SN of the signal.
  • the signal level of the analog signal input to the signal amplifying unit 14 (the signal level of the 17th image component) is ⁇ 29 dBm.
  • the level of the transmission output is up to 10 dBm, so the gain obtained by the signal amplifying unit 14 is 39 dB. Therefore, by setting the gain at DRV 23 to 29 dB and the gain at PA 24 to 10, the level of the transmitted signal becomes 10 dB.
  • the quantization noise level ( ⁇ 79 dBm) of the quantization noise output from the DAC 12 is also amplified by the signal amplifier 14, and the level after amplification becomes ⁇ 40 dB.
  • the leakage power in the band of 4.25 kHz with a detuning of 12.5 kHz is 40 dB or less, and when the transmission output level is 10 dBm, the leakage power must be suppressed to -30 dBm or less.
  • the level -40 dBm after amplification of the quantization noise satisfies this rule.
  • the LPF 15 removes noise included in the signal output from the signal amplifying unit 14.
  • the signal from which noise has been removed is transmitted to the outside via the antenna 16.
  • the radio circuit 1 modulates a signal of data to be transmitted by the modulator 10 to generate an I signal and a Q signal (step S5).
  • the radio circuit 1 converts the frequency of the modulated signal (I signal, Q signal) generated by the modulator 10 into an intermediate frequency by the frequency converter 11 (step S10).
  • the radio circuit 1 converts the modulation signal of the intermediate frequency into an analog signal by the DAC 12 (step S15).
  • the radio circuit 1 uses the BPF 13 to filter a specific image component (here, the 17th image component) among a plurality of image components having different frequencies generated when the DAC 12 outputs an analog signal (step S20). .
  • the radio circuit 1 amplifies the signal level of the filtered image component by the signal amplifying unit 14 so as to be an allowed signal level (step S25).
  • the radio circuit 1 removes noise from the amplified signal by the LPF 15 and transmits a signal via the antenna 16 (step S30).
  • the Sinc function response in the DAC 12 has regions (second, third, sixth, and seventh image components) whose phases are inverted as shown in FIG.
  • the phase of the signal that should originally be used for transmission and the phase of the seventh image component are in an opposite phase relationship. Therefore, when a 101010 signal is transmitted on the transmitting side, the receiving side expects signals to be received in the order of 101010. Therefore, the start point for one symbol is erroneously synchronized as shown in FIG. .
  • the phase inversion unit 30 is provided between the frequency conversion unit 11 and the DAC 12 and inverts the phase of the signal output from the frequency conversion unit 11.
  • phase of the seventh image component output from the DAC 12 is in an opposite phase relationship to the phase when the phase inverting unit 30 is not used, so that the start point for one symbol is erroneously synchronized on the receiving side. None do.
  • Step S11 is a step in which the phase inverting unit 30 inverts the phase of the intermediate frequency modulation signal generated in Step S10.
  • the correction filter 40 flattens the amplitude distortion in the image component to be used. Specifically, the correction filter 40 convolves a signal with a ⁇ x / sin ( ⁇ x) characteristic (complement coefficient).
  • the value of the Sinc function at a frequency corresponding to the second image component is represented by sin ( ⁇ x) / ⁇ x. Therefore, convolution of this value with the ⁇ x / sin ( ⁇ x) characteristic, that is, a value indicating that the characteristic is flat by multiplying this value by the ⁇ x / sin ( ⁇ x) characteristic in the frequency domain (f / fs). “1” can be obtained.
  • FIG. 9 shows correction for the second image component.
  • the intermediate frequency is 10 MHz and the sampling frequency (fs) is 50 MHz.
  • the value of f / fs When the value of f / fs is 1.19, the value of the Sinc function is about ⁇ 0.151, and the complementary coefficient at this time is ⁇ 6.65. Therefore, when these values are multiplied, the result is approximately 1. When the value of f / fs is 1.2, the value of the Sinc function is about ⁇ 0.1558, and the complementary coefficient at this time is ⁇ 6.4. Also in this case, the value after multiplication is approximately 1.
  • Step S12 is a step in which the correction filter 40 flattens the amplitude distortion with respect to the image component to be used in the intermediate frequency modulation signal generated in step S10.
  • the image component to be used is fixed as either a component having the same phase as the intermediate frequency signal or a component having the opposite phase, but is not limited thereto.
  • an image component to be used may be selected.
  • a switching unit for switching as follows is provided.
  • the switching unit connects the frequency conversion unit 11 and the DAC 12 when an image component in phase with the intermediate frequency signal is selected, and the frequency conversion unit 11 and the DAC 12 when an image component having an opposite phase is selected. Switch to connect to.
  • the present invention may be a combination of the above embodiment and each of the above modifications.
  • the transceiver 100 of the present embodiment includes the radio circuit 1 shown in the first embodiment and a sampling receiver that receives a signal generated without using a synthesizer. 2 and a switch 3.
  • the antenna 16 transmits and receives signals.
  • the switch 3 performs switching so that the antenna 16 and the radio circuit 1 are connected when a signal is transmitted, and the antenna 16 and the sampling receiver 2 are connected when a signal is received.
  • the sampling receiver 2 includes a demodulation unit 110, an orthogonal transformation unit 111, BPFs 112 and 114, an analog-to-digital conversion circuit (ADC: Analog to Digital Converter) 113, a variable gain amplifier (PGA) 115, a low noise amplifier ( LNA: Low Noise Amplifier (116) and LPF 117. In this case, a synthesizer is not necessary.
  • ADC Analog to Digital Converter
  • PGA variable gain amplifier
  • LNA Low Noise Amplifier
  • LPF Low Noise Amplifier
  • the LPF 117 removes noise included in the signal received from the antenna 16.
  • the LNA 116 amplifies the received signal and generates less noise.
  • the PGA 115 operates in conjunction with an automatic gain control (AGC) algorithm so that the amplitude level of a signal input to the ADC 113 described later is constant.
  • AGC automatic gain control
  • the BPF 114 filters only a signal having a frequency to be demodulated so that the ADC 113 is not saturated with an unnecessary signal other than the signal to be demodulated.
  • the ADC 113 is a circuit that converts a received analog signal into a digital signal.
  • a digital signal is output from the ADC 113, a plurality of image components having different frequencies are output in the same manner as when the DAC 12 of the wireless circuit 1 is output.
  • the BPF 112 filters the image component corresponding to the IF signal component generated on the transmission side.
  • the orthogonal transform unit 111 decomposes the filtered image component signal into an I component and a Q component. Then, the orthogonal transform unit 111 uses the ROM table 22 for the decomposed I component and Q component to generate a waveform-shaped I signal and Q signal.
  • the demodulator 110 demodulates the I signal and the Q signal to obtain the original data transmitted on the transmission side.
  • the transceiver 100 can transmit and receive signals without using a synthesizer.
  • the transceiver 100 includes the wireless circuit 1, but is not limited to this.
  • the transceiver 100 may include any one of the radio circuit 1a shown in the first modification, the radio circuit 1b shown in the second modification, and the radio circuit shown in the other modification (1). Good. No matter which radio circuit is used, the configuration of the sampling receiver 2 is not changed.
  • FIG. 11 shows an illumination control system 1000 using the transceiver 100.
  • the illumination control system 1000 includes an illumination control switch 1001, fluorescent lamp fixtures 1002, 1003, 1004, 1005, and a power line 1006.
  • the illumination control switch 1001 includes a transceiver 100a and switches 1010, 1011, 1012, and 1013.
  • the transmitter / receiver 100a has the same configuration as the above-described transmitter / receiver 100, and supplies a fluorescent light fixture 1002 to 1005 with a power ON / OFF signal and a dimming signal indicating the intensity of light according to a user instruction. Send. Further, the transceiver 100a receives signals transmitted from the fluorescent lamp fixtures 1002 to 1005, respectively.
  • the signal transmitted from the fluorescent lamp fixture is, for example, a signal indicating that the signal transmitted from the illumination control switch 1001 has been normally received.
  • the switches 1010 to 1013 do not have to correspond one-to-one with the fluorescent lamp fixtures 1002 to 1005.
  • the switch 1010 turns on / off the fluorescent lamp fixtures 1002 to 1005 at the same time, and the switch 1011 switches to the fluorescent lamp fixture 1002.
  • 1003 and 1003 are ON / OFF, switch 1012 is only ON / OFF for fluorescent lamps 1004 and 1005, and switch 1013 is a switch for controlling functions such as dimming control optimal for fluorescent lamps 1002 to 1005 for presentation.
  • each of the fluorescent lamp fixtures 1002 to 1005 has the same components, the fluorescent lamp fixture 1002 will be described here.
  • Fluorescent lamp fixture 1002 has a transceiver 100b in addition to a fluorescent lamp.
  • the transceiver 100b has the same configuration as that of the transceiver 100 described above, and receives a signal transmitted from the illumination control switch 1001. Further, the transceiver 100b transmits a signal indicating that the signal transmitted from the illumination control switch 1001 has been normally received.
  • the power line 1006 is used to supply power to the fluorescent lamp fixtures 1002 to 1005 and to transmit a signal instructed by operating at least one of the switches 1010 to 1013.
  • the ON / OFF signal and the dimming signal are instructed from the illumination control switch 1001 to the fluorescent lamp fixtures 1002 to 1005 by wireless communication, and the fluorescent lamp fixtures 1002 to 1005 are controlled. be able to.
  • the instruction is performed by wireless communication, so that the supply of power from the power line 1006 is not changed, and the fluorescent lamp fixtures 1002 to 1005 are on the device side that receives the signal wirelessly. Electric power can be choked, and fine control is possible for each of the fluorescent lamp fixtures 1002 to 1005.
  • the wireless circuits in the first and second embodiments, the modifications, and the present embodiment do not use a synthesizer to generate a signal to be transmitted. For this reason, it is not necessary to secure a region for mounting a synthesizer as in the conventional case, so that the size of the radio circuit can be reduced.
  • a lighting device such as a conventional fluorescent lamp fixture is equipped with a microcomputer for controlling the inverter. Therefore, by downsizing the radio circuit of the transceiver, it can be integrated in the microcomputer, and illumination control by radio communication becomes possible.
  • the radio circuit shown in each embodiment and each modification does not use a synthesizer, so that the layout area of the synthesizer shown in FIG. 13 is not required, and the miniaturization can be realized.
  • a radio circuit includes a signal generation unit that generates a modulation signal from a signal indicating data to be transmitted, and a frequency conversion unit that converts the frequency of the modulation signal into an intermediate frequency.
  • a signal conversion unit that converts the modulated signal converted to the intermediate frequency into an analog signal, and the intermediate signal above and below a frequency that is an integer multiple of a sampling frequency of the signal conversion unit during the conversion by the signal conversion unit.
  • a filter that filters image components belonging to a specific high frequency band among image components that appear apart by a frequency, a signal amplification unit that amplifies the image components filtered by the filter, and amplification by the signal amplification unit And a transmission unit for transmitting the image component.
  • the radio circuit since the radio circuit generates a signal to be transmitted using an image component belonging to a specific high frequency band, a synthesizer is not necessary. Therefore, the wireless circuit can be reduced in size.
  • the frequency of the image component belonging to the specific high frequency band is a first frequency
  • the intermediate frequency is an integral multiple of the first frequency and the sampling frequency, and is equal to the first frequency. It may be a difference value from the nearest second frequency.
  • the radio circuit can specify the intermediate frequency by setting the frequency of the image component to be filtered as the first frequency in the frequency band to be used for transmission.
  • the intermediate frequency can be determined at the manufacturing stage of the radio circuit, so that an easy design is possible.
  • the image component belonging to the specific high frequency band is in a phase opposite to the phase of the modulation signal converted to the intermediate frequency
  • the radio circuit further includes the signal conversion unit Prior to the conversion according to, a phase inverting unit for inverting the phase of the modulation signal converted to the intermediate frequency may be provided.
  • the radio circuit inverts the phase of the modulation signal so that the specific image component at the time of signal transmission is transmitted. Is in phase with the phase of the modulation signal before inversion. Therefore, the receiving side can synchronize at the correct timing.
  • the radio circuit prior to the conversion by the signal conversion unit, the radio circuit further applies the image component to the image component so that the amplitude distortion of the image component belonging to the specific high frequency band becomes flat. It is also possible to provide a complementing unit that performs complementation.
  • the radio circuit can correct the amplitude distortion, it is possible to transmit a signal without distortion at the time of transmission.
  • the wireless circuit may be provided in a wireless transceiver that performs wireless communication.
  • the wireless circuit can be miniaturized by using the wireless circuit for the transceiver.
  • the illumination control system which consists of 1 or more lighting fixtures which are 1 aspect of this invention, and the control apparatus which controls the said 1 or more lighting fixtures by radio
  • the said control apparatus controls lighting fixtures.
  • a signal generation unit that generates a modulation signal from the control signal according to the above, a frequency conversion unit that converts the frequency of the modulation signal into an intermediate frequency, and a signal converter that converts the modulation signal converted into the intermediate frequency into an analog signal
  • Each of the one or more lighting fixtures receives the image component, demodulates the received image component to generate the control signal, and based on the generated control signal, It is characterized by controlling illumination.
  • the radio circuit of the illumination control system since the radio circuit of the illumination control system generates a signal to be transmitted using an image component belonging to a specific high frequency band, a synthesizer is not necessary. Therefore, it is possible to reduce the size of the radio circuit, and it is also possible to incorporate the miniaturized radio circuit into a circuit provided in the lighting fixture.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)

Abstract

L'invention concerne un circuit sans fil avec lequel un signal à être transmis est généré sans utiliser un synthétiseur, permettant la miniaturisation. Le circuit sans fil (1) comprend : un modulateur (10) qui génère un signal modulé d'un signal qui dénote des données à transmettre ; une unité de conversion de fréquence (11) qui convertit une fréquence du signal modulé à une fréquence intermédiaire ; un convertisseur analogique-numérique (12) qui convertit le signal modulé qui est converti à la fréquence intermédiaire à un signal analogique ; un filtre passe-bande (13) qui filtre un composant d'image qui est associé à une bande de haute fréquence spécifiée, parmi les composants d'image qui, dans la conversion par le convertisseur numérique-analogique (12), apparaissent verticalement à distance de chaque entier multiple d'une fréquence d'échantillonnage de l'unité de conversion de signal par la fréquence intermédiaire ; une unité d'amplificateur de signal (14) qui amplifie le composant d'image filtré ; et une antenne (16) qui transmet le composant d'image amplifié.
PCT/JP2013/000320 2012-01-23 2013-01-23 Circuit sans fil et système de commande d'éclairage WO2013111584A1 (fr)

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JP2012010901A JP5861084B2 (ja) 2012-01-23 2012-01-23 無線回路及び照明制御システム
JP2012-010901 2012-01-23

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WO2013111584A1 true WO2013111584A1 (fr) 2013-08-01

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002271212A (ja) * 2001-02-16 2002-09-20 Lucent Technol Inc デジタル信号をアナログ形式で処理する方法と送信器
JP2005020693A (ja) * 2003-06-24 2005-01-20 Northrop Grumman Corp 極および線形増幅器システム
JP2009253838A (ja) * 2008-04-09 2009-10-29 Toshiba Corp Ｏｆｄｍ送信装置とその周波数変換装置
JP2010056612A (ja) * 2008-08-26 2010-03-11 Panasonic Electric Works Co Ltd 負荷制御システム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002271212A (ja) * 2001-02-16 2002-09-20 Lucent Technol Inc デジタル信号をアナログ形式で処理する方法と送信器
JP2005020693A (ja) * 2003-06-24 2005-01-20 Northrop Grumman Corp 極および線形増幅器システム
JP2009253838A (ja) * 2008-04-09 2009-10-29 Toshiba Corp Ｏｆｄｍ送信装置とその周波数変換装置
JP2010056612A (ja) * 2008-08-26 2010-03-11 Panasonic Electric Works Co Ltd 負荷制御システム

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