JP2016058999A - Transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmission device capable of transmitting at a stable frequency.SOLUTION: In a transmission device having a transmission controller for transmitting different modulation data signals from plural antennas at the same frequency of 1200 MHz by an OFDM system, a single cable and a transmission high frequency unit, the transmission controller frequency-converts OFDM modulation waves to positive phase and inverted phase of the frequency 3CLO which are three times as high as the frequency (10 MHz) of a common local oscillator CLO corresponding to 30 MHz of the difference of 130 MHz and 190 MHz, the signal which is frequency-converted to the positive phase and inverted phase of 30 MHz is frequency-converted by 16 CLO which is equal to 160 MHz as the average of IF2 and IF1, 130 MHz and 190 MHz are taken out, 130 MHz and 190 MHz are transmitted by using a single coaxial cable, and the transmission high frequency unit converts transmitted 130 MHz and 190 MHz to 160 MHz by 3CLO, converts 160 MHz to 1200 MHz by 104CLO, and transmits from an antenna.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a MIMO (Multiple Input Multiple Output) communication apparatus in which, for example, a communication system provided with a plurality of transmission / reception antennas is an OFDM (Orthogonal Frequency Division Multiplexing) system.

  MIMO transmission uses a plurality of transmission antennas to transmit a radio signal at the same radio frequency (or high frequency) (RF). In the transmission path, data transmitted from each antenna is multiplexed in the space. A plurality of receiving antennas are also used to receive the signal. Equipment for transmitting broadcast material video is called FPU (Field Pick Up) in Japan. Data transmitted by the FPU is OFDM-modulated by a transmission control unit, and video, audio and other data, pilot signals (CP: Continuous Pilot), transmission control information (TMCC: Transmission and Multiplexing Configuration and Control), spare data ( AUX) is configured as one OFDM symbol.

  In the MIMO mode, if the center frequencies of the two systems are different at the radio frequency (or high frequency) (RF), transmission performance deteriorates due to interference between the antenna systems. In the case where two intermediate frequency (IF) signals of two different frequencies are transmitted with a single IF cable, the above-described degradation occurs due to the relative frequency difference between the transmission control unit and the transmission high-frequency unit oscillator.

番目のサブキャリア信号は式(1)に示すように、sinc関数で表現できる。

(1)

（デルタｆ）の周波数偏差が生じた場合にはサブキャリア間の干渉：ICI（Inter Carrier Interference）が発生する。式(1)に対して

の周波数偏差（サブキャリア間隔で正規化した周波数）が生じた場合の信号は式(2)となる。

(2)

の周波数偏差が生じた場合の式(2)に示す波形を図1に示す。式(2)において、

の場合が信号成分であり、

の場合が雑音成分となる。 OFDM signal

The th subcarrier signal can be expressed by a sinc function as shown in equation (1).

(1)

When a frequency deviation of (delta f) occurs, interference between subcarriers: ICI (Inter Carrier Interference) occurs. For equation (1)

The signal when the frequency deviation (frequency normalized by the subcarrier interval) occurs is given by Equation (2).

(2)

FIG. 1 shows the waveform shown in the equation (2) when the frequency deviation of FIG. In equation (2):

Is the signal component,

The case of is a noise component.

(3)と表わされる。図2は式(3)で示した周波数偏差

（デルタｆ）と等価C/N（

）の関係を示している。図2より、等価C/Nの仕様として35dB以上を定めると、許容の周波数偏差

は0.01程度となり、FFT-2kモードではサブキャリア間隔が10kHzであるため、許容周波数偏差は100Hzとなる。ARIBでは50Hzを仕様としている。 From this, the equivalent C / N by ICI is

It is expressed as (3). Figure 2 shows the frequency deviation shown in equation (3).

(Delta f) and equivalent C / N (

) Relationship. From Fig. 2, if 35dB or more is defined as the equivalent C / N specification, the allowable frequency deviation

Is about 0.01, and in the FFT-2k mode, the subcarrier interval is 10 kHz, so the allowable frequency deviation is 100 Hz. ARIB uses 50Hz as the specification.

（デルタａ）、送信高周波部の基準発振器周波数の周波数偏差を

とすると、送信制御部からのIF周波数は、1系、2系それぞれ、 1系：

2系：

(4)となる。送信高周波部では一旦ダイレクトコンバージョンによって周波数を直流（DC）にシフトするが、その際の局部発振器 （LO）周波数は1系、2系それぞれ、 1系：

2系：

(5)である。従って、ダイレクトコンバージョン後の周波数は 1系：

2系：

(6)となる。よって、1系と2系の周波数差は

(7)となる。ここで、送信制御部と高周波部の最大偏差量はほぼ同程度とし、ずれ量が最悪ケースとして正方向と負方向に最大にずれた場合の周波数偏差を式(8)で近似する。

(8) 図3は式(8)で示した、局部発振器（LO）の周波数偏差

（デルタａ）と1系/2系の周波数偏差の関係を示した図である。IF周波数として、

130/220MHzあるいは、130/240MHzとしている。これより、送信制御部、送信高周波部の周波数偏差をそれぞれ0.6ppm以下にする必要がある。0.6ppm以下の高精度の仕様を満足するには、一般に恒温槽付電圧制御水晶発振器あるいはデジタル型温度補償発振器などの高価な局部発振器（LO）が必要となる。 The allowable frequency deviation when independent reference oscillators are used in the transmission control unit and the transmission high-frequency unit is examined. The frequency deviation of the reference oscillator frequency of the transmission control unit

(Delta a), the frequency deviation of the reference oscillator frequency of the transmission high-frequency part

Then, the IF frequency from the transmission control unit is 1 system, 2 system, 1 system:

Series 2:

(4) In the transmission high-frequency part, the frequency is temporarily shifted to direct current (DC) by direct conversion, but the local oscillator (LO) frequency at that time is 1 system, 2 systems, 1 system:

Series 2:

(5). Therefore, the frequency after direct conversion is 1 system:

Series 2:

(6) Therefore, the frequency difference between system 1 and system 2 is

(7) Here, the maximum deviation amount between the transmission control unit and the high frequency unit is approximately the same, and the frequency deviation when the deviation amount is shifted to the maximum in the positive direction and the negative direction as a worst case is approximated by Expression (8).

(8) Figure 3 shows the frequency deviation of the local oscillator (LO) shown in equation (8).

It is the figure which showed the relationship between (delta a) and the frequency deviation of 1 system / 2 system. As IF frequency,

130 / 220MHz or 130 / 240MHz. Accordingly, it is necessary to set the frequency deviations of the transmission control unit and the transmission high-frequency unit to 0.6 ppm or less. In order to satisfy the specifications with high accuracy of 0.6 ppm or less, generally an expensive local oscillator (LO) such as a voltage controlled crystal oscillator with a thermostatic chamber or a digital type temperature compensated oscillator is required.

  In Patent Document 1, a digital modulation unit outputs a baseband signal of 30 MHz (= ω), a baseband filter limits unnecessary bands of the baseband signal (band limitation), and a local oscillator has a frequency of 100 MHz (= Lo). And the mixer inputs the 30 MHz signal after the restriction and the 100 MHz signal to perform frequency conversion. Here, the frequency conversion by the mixer is expressed as (IF = Lo ± ω), where IF is the intermediate frequency. As a result, two outputs, ie, a 130 MHz (= Lo + ω) signal, which is a domestic specification of intermediate frequencies in the FPU device, and a 70 MHz (= Lo−ω) signal, which is an overseas specification, are obtained as outputs from the mixer.

  In addition, a 2500 MHz 14-bit DAC (see Non-Patent Document 1), a 5700 MHz 14-bit DAC (see Non-Patent Document 2), and a 3600 MHz 12-bit ADC (see Non-Patent Document 3) have been commercialized for mobile phone base stations.

JP 2010-68443 A

Analog Devices 2.5Gbps 14bitDAC AD9739A http://www.analog.com/static/imported-files/data_sheets/AD9739A.pdf Analog Devices 5.7Gbps 14bitDAC AD9129A http://www.analog.com/static/imported-files/data_sheets/AD9119_9129.pdf Texas Instruments 3.6Gbps 12bit ADC ADC12D1800RF http://www.ti.com/lit/ds/snas518i/snas518i.pdf

(The contents in parentheses are deleted at the time of filing.) The present invention has been made in view of such conventional circumstances. In consideration of the secular change, the transmission control unit and the transmission high-frequency unit have a frequency deviation of 0.6 ppm each. High-accuracy allowable frequency of radio frequency (RF ARIB specification 50Hz) using relatively inexpensive LO (with 1ppm deviation) without using an expensive local oscillator (LO) that satisfies high-precision specifications (below) The purpose is to realize the deviation.

(Common concept of plan 234) In order to achieve the above object, the present invention provides a single transmission high-frequency unit that transmits different modulated data signals from a plurality of antennas at the same radio frequency (RF) (1200 MHz) by the OFDM method. A transmission apparatus comprising a unit for transmitting a plurality of intermediate frequencies from the transmission control unit to a transmission high-frequency unit using the single cable, the intermediate frequency cable (coaxial or twisted pair) and a transmission control unit; In the transmission control unit (plan 3 FIG. 9B), a common local oscillator having a frequency (30 MHz) half the absolute value of the difference between the first intermediate frequency IF1 (130 MHz) and the second intermediate frequency IF2 (190 MHz) Means to convert the frequency of the OFDM modulated wave to the positive and negative phases of 3CLO (30MHz), 3 times the frequency of the CLO (10MHz), and the frequency of the OFDM modulated wave to the positive and negative phases of 3CLO (30MHz) Signal is IF3 (130MHz) and third Means of frequency conversion at 10CLO (100MHz), which is 10 times the frequency of common local oscillator CLO (10MHz), which is the average frequency (100MHz) with intermediate frequency IF3 (70MHz), and the frequency converted signal at 10CLO Means for taking out the lower sideband (70 MHz) and the positive phase upper sideband (190 MHz) of the signal frequency-converted by the 10CLO, and the frequency of the CLO (10 MHz) which is the average frequency (160 MHz) of the IF2 and IF1 ) 16 times the frequency 16CLO, means for taking out the lower side band of the positive phase and the negative phase of the different frequency (30 MHz and 90 MHz) of the signal converted by the 16 CLO, and the extracted positive phase The IF3 (70 MHz) and IF1 (70 MHz) and IF1 (which are the lower sidebands of the positive phase of different frequencies (70 MHz and 130 MHz) of the frequency converted signal by the 16CLO and the lower sideband of the negative phase are converted by the 16CLO. 130MHz) and different frequency (190MHz and 250MHz) of the signal converted by 16CLO Configuration of means for taking out IF2 (190 MHz) and the fourth intermediate frequency IF4 (250 MHz), which are the positive upper sidebands, or (plan 3 FIG. 9A and FIG. 10) first intermediate frequency IF1 (130 MHz) The positive and negative phases of the frequency 3CLO (30MHz), which is three times the frequency of the common local oscillator CLO (10MHz), which is half the absolute value (30MHz) of the difference between the IF2 and the second intermediate frequency IF2 (190MHz) Means for converting the frequency of the OFDM modulated wave and a signal obtained by converting the frequency of the OFDM modulated wave in the positive and negative phases of the 3CLO (30 MHz) to the CLO frequency (160 MHz) which is the average frequency (160 MHz) of the IF2 and the IF1. 10 MHz) 16 times the frequency of the 16CLO frequency conversion means and the IF1 (130 MHz), which is the lower sideband of the opposite phase of the signal frequency-converted by the 16CLO, and the positive-phase upper side of the signal frequency-converted by the 16CLO A configuration of means for taking out the IF2 (190 MHz) which is a band, or (plan 2 FIG. 8A and FIG. 8B) a frequency NCLO which is a multiple of the frequency of the CLO A plurality of means for frequency-converting the OFDM modulated wave to (positive phase) of 20 MHz or 30 MHz) and a plurality of signals obtained by frequency-converting the OFDM modulated wave to NCLO (positive phase) of the plurality of intermediate frequencies (IF1 (130 MHz)) And IF2 (190MHz) or IF1 (130MHz) and IF2 (190MHz), the third intermediate frequency IF3 (70MHz) and the fourth intermediate frequency IF4 (250MHz) and the frequency of the difference between the NCLO (11CLO (110MHz) and 17CLO (170MHz) or 11CLO (110MHz) and 17CLO (170MHz) and 5CLO (50MHz) and 23CLO (230MHz) or 10CLO (100MHz) and 16CLO (160MHz) or 10CLO (100MHz) and 16CLO (160MHz) and 4CLO (40MHz) 22CLO (220 MHz)) and a configuration of a plurality of means for extracting the plurality of intermediate frequencies that are the positive-phase upper sidebands of the plurality of signals frequency-converted at a frequency multiplied by the CLO. Fig. 12B) OFDM modulated wave in the digital domain with a plurality of intermediate frequencies (IF1 (130MHz), IF2 (190MHz) and IF3 (70MHz) Digital / analog conversion (D / A) at a frequency (64CLO (640MHz), 80CLO (800MHz) or 96CLO (960MHz)) multiplied by the frequency of the synchronized common local oscillator CLO converted to IF4 (250MHz) And having a means for converting the plurality of intermediate frequencies (IF1 (130 MHz), IF2 (190 MHz), IF3 (70 MHz), and IF4 (250 MHz)) of the linked frequencies through an LPF, The plurality of intermediate frequencies of one configuration have a configuration of a plurality of means for extracting the frequency with a frequency linked to the frequency of the CLO by frequency conversion by a frequency multiplied by the frequency of the CLO (10 MHz). Means for converting the plurality of intermediate frequencies transmitted using the single cable to the same radio frequency (RF) (1200 MHz) by frequency conversion of the intermediate frequencies by a frequency multiplied by the frequency of the CLO; Same as above Means for transmitting the radio frequency (RF) (1200 MHz) from the plurality of antennas, and the same radio frequency (RF) of the different modulated data signals transmitted from the plurality of antennas is the frequency of the CLO. The transmission device is characterized by equalizing the ratio of interlocking with (10 MHz).

(Concepts of Proposal 234) Further, in any one of the configurations of the above transmitter, (Proposal 3 FIG. 9B) IF1 (130 MHz), IF2 (190 MHz), IF3 (70 MHz ) And IF4 (250 MHz) at a frequency 16CLO (160 MHz) of the phase-locked loop PLL 16 times the frequency of the CLO and a lower sideband of the opposite phase of the signal frequency-converted at the 16 CLO (30 MHz) Means for taking out the 3CLO (30 MHz) and 9CLO (90 MHz), means for converting the extracted 3CLO (30 MHz) and 9CLO (90 MHz) with the 16 CLO (160 MHz) and the frequency conversion with the 16 CLO (30 MHz) Means for extracting the 7 CLO (70 MHz) and 13 CLO (130 MHz) of the lower sideband of the positive phase of the signal, and the extracted 7 CLO (70 MHz) and 13 CLO (130 MHz) are 10 times the phase of the CLO frequency. Means for frequency conversion at frequency 10CLO (100MHz) of synchronous loop PLL and reverse of frequency converted signal at 10CLO (100MHz) Means for extracting the 3CLO (30 MHz) in the lower sideband, means for converting the extracted 3CLO (30 MHz) at a frequency 117 CLO (1170 MHz) of a phase-locked loop PLL that is 117 times the frequency of the CLO, and the 117 CLO The structure of the means for converting to the same high frequency RF (1200 MHz) of the upper sideband of the opposite phase of the signal frequency-converted in (3) (plan 3 FIG. 9A) IF1 of the linked frequency to the transmission high-frequency unit Means for converting the frequency of IF2 at a frequency 3CLO (30 MHz) of a phase-locked loop PLL that is three times the frequency of the CLO, and the frequency conversion at the lower sideband 16CLO (160 MHz) of the signal frequency-converted by the 3CLO and the 3CLO Means for extracting the 16 CLO (90 MHz) of the upper sideband of the obtained signal, means for frequency converting the extracted 16 CLO (160 MHz) with the frequency 104 CLO (1040 MHz) of the phase-locked loop PLL 104 times the frequency of the CLO, and the 104 CLO The same high frequency RF that is the upper sideband of the signal frequency-converted at 1200 MHz), and (Claim 3 Fig. 10) The transmission high-frequency unit, IF1 and IF2 of the interlocked frequency to the average frequency (160MHz) of IF1 and IF2 of the interlocked frequency Means for converting the frequency at a frequency 16CLO (160 MHz) of a phase-locked loop PLL 16 times the frequency of the signal, means for extracting 3CLO (30 MHz) of the lower sideband of the signal frequency-converted by the 16CLO, and the extracted 3CLO (30 MHz ) Is converted at a frequency 117CLO (1170 MHz) of the phase locked loop PLL that is 117 times the frequency of the CLO, and the same high frequency RF (1200 MHz) that is the upper side band of the signal frequency-converted by the 117CLO is extracted. And (plan 2 FIG. 8A and FIG. 8B) means for linking the common local oscillator of the transmission control unit and the common local oscillator of the transmission control unit with each other by a phase-locked loop PLL. The frequency of the common local oscillator CLO linked to the control unit. A means for frequency-converting an OFDM modulated wave to a frequency multiplied by a number NCLO (20 MHz or 30 MHz) (positive phase thereof) and a signal obtained by frequency-converting the OFDM modulated wave to the NCLO (positive phase) of the plurality of intermediate frequencies (IF1 (130MHz) and IF2 (190MHz) or IF1 (130MHz) and IF2 (190MHz), third intermediate frequency IF3 (70MHz) and fourth intermediate frequency IF4 (250MHz)) and the frequency of the difference between the NCLO (11CLO ( 110MHz) and 17CLO (170MHz) or 11CLO (110MHz) and 17CLO (170MHz) and 5CLO (50MHz) and 23CLO (230MHz) or 10CLO (100MHz) and 16CLO (160MHz) or 10CLO (100MHz) and 16CLO (160MHz) and 4CLO ( 40 MHz) and 22 CLO (220 MHz)) having means for taking out the plurality of intermediate frequencies that are the upper phase bands of the positive phase of the signal frequency-converted at the frequency multiplied by the CLO, and the interlocking with the transmission high-frequency unit The intermediate frequencies (IF1 (130 MHz) and IF2 (190 MHz) or IF1 (130 MHz) and IF2 (1 90MHz), IF3 (70MHz) and IF4 (250MHz)), the frequency of the common local oscillator CLO, which is linked to the frequency (17CLO (170MHz) and (11CLO (110MHz) or 17CLO (170MHz) and (11CLO (110MHz)) ), 23CLO (230MHz) and 5CLO (50MHz)) 30CLO (300MHz), 30 times the frequency of the CLO, which is the upper sideband of the signal frequency-converted at the frequency multiplied by the frequency multiplied by the frequency of the CLO Means for taking out (by equalizing the sum of the division ratios of the frequency of the common local oscillator CLO of the phase locked loop PLL of the transmission control unit and the transmission high-frequency unit) and the 30 CLO taken out (300 MHz) to the CLO A configuration having means for extracting the same radio frequency (RF) (1200 MHz), which is the upper side band of a signal frequency-converted at a frequency 90 CLO (900 MHz) of a phase-locked loop PLL 90 times the frequency of (3) Common local oscillator of the transmission control unit and the transmission control unit A means for linking a common local oscillator with each other by a phase-locked loop PLL, and the linking of the same high frequency RF (1200 MHz) and a difference between a plurality of intermediate frequencies of the linked frequencies in the transmission high frequency section A configuration having means for directly converting and extracting a plurality of intermediate frequency frequencies of the interlocked frequencies at the frequency multiplied by the frequency of the common local oscillator CLO, and extracting the same to the same high frequency RF. It is a transmitter characterized by having.

(Concept of high-speed DAC of plan 4) In any one of the configurations of the transmission device, the transmission control unit may determine a difference between the first intermediate frequency IF1 (130 MHz) and the second intermediate frequency IF2 (190 MHz). Means for frequency-converting an OFDM-modulated wave in the digital domain in the positive and negative phases of the frequency 3CLO (30MHz), which is three times the frequency of the common local oscillator CLO (10MHz), which is half the absolute value (30MHz) 3CLO (30 MHz) OFDM modulated wave frequency converted to normal phase and reverse phase of digital signal at 16 CLO common frequency 16 CLO which is the average frequency (160 MHz) of IF2 and IF1 and the CLO frequency (10 MHz) The IF1 (130 MHz), which is the lower sideband of the opposite phase of the signal frequency-converted at the common frequency 16CLO, and the positive-phase upper sideband of the signal frequency-converted at the common frequency 16CLO Means for taking out IF2 (190 MHz) in the digital domain, and the common IF1 (130 MHz) and IF2 (190 MHz) obtained by frequency conversion at a frequency of 16 CLO, and IF2 (190 MHz) are multiplied by the common frequency 16 CLO (160 MHz) (320 MHz, 480 MHz, 640 MHz, 800 MHz, 960 MHz, or 1120 MHz) or the IF1 ( 130MHz) and IF2 (190MHz) common frequency multiplication (3040MHz) common digital (analog) conversion (D / A) means, first intermediate frequency IF1 (130MHz) and second intermediate frequency IF2 (190 MHz), a third intermediate frequency IF3 (70 MHz), and a fourth intermediate frequency IF4 (250 MHz), a means for frequency-converting an OFDM modulated wave in the digital domain, and the plurality of intermediate frequencies of any one of the configurations The digital frequency is converted in the digital domain with the common frequency multiplied by the CLO and the common frequency multiplied by the common frequency multiplied by the CLO or the common frequency multiplied by the common frequency of the plurality of intermediate frequencies. The transmission high-frequency unit includes a plurality of intermediate frequencies (IF1 (130 MHz), IF2 (190 MHz), and IF3 (70 MHz)). IF4 (250 MHz)) is analog / digital converted (A / D) at a frequency (64 CLO (640 MHz), 80 CLO (800 MHz) or 96 CLO (960 MHz)) multiplied by the frequency of the synchronized local local oscillator CLO. Means for analog conversion (D / A) and conversion to a frequency 16NCLO (160 MHz or 320 MHz) multiplied by 16 times the frequency of the CLO and the converted 16N CLO at a frequency 104CLO (104 or 88 times the CLO frequency) 1040MHz) or 88CLO (880MHz), the means for converting to the same radio frequency (RF) (1200MHz), the transmission high-frequency part, IF1 (130MHz), IF2 (190MHz) and IF3 (IF3 ( 70MHz) and IF4 (250MHz) are 16 times in phase with the CLO frequency. Means for converting the frequency at a loop PLL frequency of 16 CLO (160 MHz), means for extracting the 3 CLO (30 MHz) and the 9 CLO (90 MHz) of the lower sideband of the opposite phase of the signal frequency-converted by the 16 CLO (30 MHz), Means for frequency conversion of the extracted 3CLO (30 MHz) and 9 CLO (90 MHz) with the 16 CLO (160 MHz), and the 7 CLO (70 MHz) and 13 CLO of the lower sideband of the positive phase of the signal frequency-converted with the 16 CLO (30 MHz) Means for extracting (130 MHz), means for converting the extracted 7 CLO (70 MHz) and 13 CLO (130 MHz) with a frequency 10 CLO (100 MHz) of a phase-locked loop PLL 10 times the frequency of the CLO, and the 10 CLO ( 100 MHz) means for extracting the 3CLO (30 MHz) of the lower sideband of the opposite phase of the signal whose frequency is converted, and the extracted 3CLO (30 MHz) is a frequency 117 CLO of the phase-locked loop PLL that is 117 times the frequency of the CLO. 1170MHz) before the upper sideband of the opposite phase of the signal frequency-converted by 117CLO Means for converting to the same high-frequency RF (1200 MHz), and means for frequency-converting the interlocked frequencies IF1 and IF2 at a frequency 3CLO (30 MHz) of the phase-locked loop PLL three times the frequency of the CLO And means for taking out 16 CLO (160 MHz) of the lower sideband of the signal frequency-converted by the 3CLO and 16 CLO (90 MHz) of the upper sideband of the signal frequency-converted by the 3CLO, and the 16CLO (160 MHz) taken out of the CLO The means for converting the frequency at the frequency 104CLO (1040MHz) of the phase-locked loop PLL 104 times the frequency of the signal and the means for extracting the same high frequency RF (1200MHz) which is the upper sideband of the signal frequency-converted by the 104CLO And IF1 and IF2 of the interlocked frequencies are frequency-converted at a frequency 16CLO (160 MHz) of the phase-locked loop PLL that is 16 times the frequency of the CLO that is the average frequency (160 MHz) of the IF1 and IF2 of the interlocked frequencies. And frequency-converted signal by 16CLO Means for taking out the lower sideband 3CLO (30 MHz), means for converting the extracted 3CLO (30 MHz) at a frequency 117 CLO (1170 MHz) of the phase-locked loop PLL that is 117 times the frequency of the CLO, and a frequency at the 117 CLO And a means for extracting the same high frequency RF (1200 MHz), which is the upper sideband of the converted signal, and frequency-converting the plurality of intermediate frequencies of any one of the configurations at a common frequency multiplied by the CLO A transmission apparatus characterized by having a configuration of means.

(Draft 234 Common Higher Concept Challenge Claim) That is, the present invention provides a single transmission high-frequency unit that transmits different modulated data signals from a plurality of antennas at the same radio frequency (RF) (1200 MHz) by the OFDM method. In a transmission apparatus comprising an intermediate frequency cable and a transmission control unit and having means for transmitting a plurality of intermediate frequencies from the transmission control unit to a transmission high frequency unit using the single cable, OFDM modulation is performed on the transmission control unit. Means for frequency converting the plurality of intermediate frequencies to a plurality of intermediate frequencies at a frequency multiplied by a first set of common local oscillators CLO, and transmitting the plurality of intermediate frequencies to the second set of CLOs Means for converting to the same high frequency RF (1200 MHz) at the multiplied frequency, and the same radio frequency (RF) of each different modulated data signal transmitted from the plurality of antennas A transmitting apparatus characterized by equal proportions in conjunction with the frequency (10 MHz) of CLOs.

  As described above, according to the present invention, when a frequency deviation occurs in the mixer LO signal by using a common Lo between the systems, the absolute values of the frequency deviations of the IF frequencies are equalized between the systems. Set the frequency relative deviation to 0. Therefore, even with a relatively low-priced crystal oscillator, it is possible to achieve a high-accuracy allowable frequency deviation of radio frequency (RF ARIB specification 50 Hz) and convert it to the same high frequency RF (1200 MHz).

Schematic diagram explaining signal components and noise components when frequency deviation occurs Schematic diagram explaining the relationship between frequency deviation delta f and equivalent C / N (CNR) Schematic diagram explaining the relationship between the frequency deviation delta a of the oscillator and the frequency deviation of the 1 system / 2 system FIG. 1 is a block diagram showing a direct conversion & PLL configuration of a (plan 1) MIMO-OFDM transmission apparatus according to an embodiment of the present invention; 1 is a block diagram showing a PLL device configuration of a direct conversion & PLL configuration of a (plan 1) MIMO-OFDM transmission device according to an embodiment of the present invention; 1 is a block diagram showing a detailed configuration of a PLL device configuration of a direct conversion & PLL configuration of a (plan 1) MIMO-OFDM transmission device according to an embodiment of the present invention; Block diagram showing the structure of a MIMO-OFDM transmission system ((a) intermediate frequency (IF) and two antennas, (b) intermediate frequency (IF) and four antennas) (Draft 2) In another embodiment of the present invention, a phase-locked loop (PLL) is performed between the transmission control unit (TC) and the transmission high-frequency unit (TH), and the TC PLL division ratio and the TH PLL division ratio are set. Block diagram (D / A at 20 MHz) ((a) The intermediate frequency (IF) is two, and the TC PLL frequency division ratio and the TH PLL frequency division ratio are set to cross, (b) Intermediate (Frequency (IF) is 4 and the sum of TC PLL division ratio and TH PLL division ratio is equal) (Draft 2) In another embodiment of the present invention, a phase-locked loop (PLL) is performed between the transmission control unit (TC) and the transmission high-frequency unit (TH), and the TC PLL division ratio and the TH PLL division ratio are set. Block diagram showing a configuration with the same total (D / A at 30 MHz) ((a) The intermediate frequency (IF) is two and the sum of the TC PLL frequency division ratio and the TH PLL frequency division ratio is equal, (b) Intermediate (Frequency (IF) is 4 and the sum of TC PLL division ratio and TH PLL division ratio is equal) (Draft 3) Block diagram showing a common Lo mixer configuration (an intermediate frequency (IF) and two antennas) of another embodiment of the present invention (Draft 3) Block diagram showing a common Lo mixer configuration (an intermediate frequency (IF) and four antennas, two TCs, two for each of the positive phase and the reverse phase, 30 MHz in total) according to another embodiment of the present invention. MIX at 100MHz, extract at 130MHz / 70MHz, mix at 160MHz, extract at 30MHz / 90MHz, mix at 160MHz, extract at 130MHz / 190MHz / 70MHz / 250MHz, transmit, mix at 160MHz with TH, extract at 30MHz / 90MHz MIX at 160MHz, 130MHz / 70MHz, MIX at 100MHz, 30MHz, MIX at 1070MHz, 1200MHz Block diagram showing a (Lo 3) common Lo mixer configuration of another embodiment of the present invention Schematic diagram illustrating the frequency shift of another embodiment of the present invention. Block diagram showing (Draft 4) common Lo D / A configuration and common Lo mixer configuration of another embodiment of the present invention ((a) Multiplication (320 MHz) of common 16 CLO (160 MHz) in transmission control unit (TC) Or D / A at a frequency of 480 MHz, 640 MHz, 800 MHz or 960 MHz), (b) D / A at a frequency of the common multiplication (3040 MHz) of IF1 (130 MHz) and IF2 (190 MHz) in the transmission control unit (TC)) Block diagram illustrating (Draft 5) 4 × 4 MIMO common Lo D / A configuration and common Lo mixer configuration of another embodiment of the present invention ((c) 4 × 4 MIMO common to transmission control unit (TC) 16 CLO (160 MHz)) D / A at a frequency multiplied by 480 MHz, 640 MHz, 800 MHz or 960 MHz, A / D at a frequency multiplied by 16 CLO (160 MHz) common in the transmission high-frequency part (TH), re-D / A, and 16 CLO (160 MHz ) Or 32 CLO (320 MHz) and converted to 1200 MHz by 104 CLO (1040 MHz) (d) D / A at a frequency multiplied by 16 CLO (160 MHz) common in the transmission control unit (TC) by 4 × 4 MIMO, and the transmission high frequency unit ( TH) A / D at a frequency multiplied by 16CLO (160MHz) common, D / A at 240CLO (2400MHz), and converted to 1200MHz.) Block diagram showing (Draft 5) 4 × 4 MIMO common Lo D / A configuration and common Lo mixer configuration of another embodiment of the present invention ((e) 4 × 4 MIMO common to transmission control unit (TC) 16 CLO (160 MHz)) D / A at a frequency multiplied by 480MHz or 640MHz or 800MHz or 960MHz, MIX with 16CLO (160MHz) common in the transmission high frequency part (TH), 30MHz / 90MHz extraction, MIX at 160MHz, 130MHz / 70MHz extraction, Mix at 100MHz, take out 30MHz, mix at 1070MHz, take out 1200MHz.)

As an overall configuration of the embodiment of the present invention, an FPU transmission system compliant with ARIB-STD-B33 will be described.
In FIG. 7 of the explanatory diagram showing the MIMO-OFDM transmission system, (a) shows two intermediate frequencies (IF) and antennas, and (b) shows four intermediate frequencies (IF) and antennas. . In FIG. 7, 1 is a transmission control unit, 2 is a transmission high frequency unit, 3 to 10 are antennas, 11 is a transmission high frequency unit, and 12 is a reception control unit.

  A MIMO-OFDM transmission system includes a transmission unit configured by one transmission control unit, two transmission high-frequency units, and two transmission antennas, one reception control unit, two reception high-frequency units, and two reception antennas. A transmission system at a receiving unit is generally used. The transmission control unit transmits an intermediate frequency (IF) signal to the transmission high frequency unit. The transmission high-frequency unit modulates the IF signal into an RF (Radio Frequency) signal, performs power amplification, and then transmits the signal from the transmission antenna to space.

  The transmission control unit outputs different IF signals for each of the two systems. The transmission control unit performs signal processing such as adding an error correction code, frequency / time interleaving, or quadrature modulation to a TS signal of video, audio, or other data. The transmission high-frequency unit modulates the IF signal into an RF (Radio Frequency) signal, performs power amplification, and then transmits the signal from the transmission antenna to space. The transmission high-frequency unit 2 transmits signals from the transmission antennas 3 to 6 at the same frequency. The reception high-frequency unit 11 receives the same frequency using the reception antennas 7 to 10. In (a) with two intermediate frequencies (IF) and two antennas, the receiving antenna 7 receives two signals from the transmitting antennas 3 and 4 that are affected by different transmission paths. Similarly, the receiving antenna 8 receives two signals from the transmitting antennas 3 and 4 that are affected by different transmission paths. In (b) having four intermediate frequencies (IF) and four antennas, the receiving antenna 7 receives four signals from the transmitting antennas 3 to 6 that are affected by different transmission paths. Similarly, the receiving antenna 10 similarly receives four signals from the transmitting antennas 3 to 6 that are affected by different transmission paths.

  The reception high-frequency unit converts the frequency of the RF signal received by the reception antenna into an IF signal. The reception control unit demodulates the IF signal and outputs a TS (Transport Stream) signal. The reception control unit performs decoding of an error correction code of demodulated data and frequency / time interleaving signal processing.

An embodiment according to the present invention will be described with reference to FIGS.
In FIG. 4 of the block diagram showing the direct conversion & PLL configuration of the (plan 1) MIMO-OFDM transmission device of one embodiment of the present invention, the transmission control unit converts the DC frequency to the IF frequency by direct conversion. In the high-frequency part, on the contrary, the frequency is once converted to DC and then converted to RF by direct conversion. This method requires a PLL between Tc and Th, and generates a Lo leak due to the direct conversion method.

In FIG. 5 of the block diagram showing the PLL device configuration of the direct conversion & PLL configuration of the MIMO-OFDM transmission device according to (plan 1) of one embodiment of the present invention, the oscillator mounted on each is 10 MHz, and the transmission high-frequency unit is The counted result is transferred to the FPGA via the PLC module. The FPGA controls the oscillation frequency of the transmission control unit by comparing the obtained counter value with the result counted by itself.

  FIG. 6 is a block diagram showing the detailed configuration of the PLL device configuration of the direct conversion & PLL configuration of the MIMO-OFDM transmission device according to (Draft 1) of one embodiment of the present invention. The Th CPU generates a timer interrupt every 100 ms. Then, the counter value in the CPLD is read with the highest priority so as to reduce the transfer jitter and transferred to Tc. Similarly, the CPU of Tc writes the count value to the register in the FPGA with the highest priority. The Tc FPGA performs PLL control based on the register information.

  The operation will be described with reference to FIGS. 8A and 8B of the block diagram showing the (Draft 2) heterodyne & PLL configuration of another embodiment of the present invention.

  FIG. 8A is a diagram (plan 2) of another embodiment of the present invention, in which a phase-locked loop (PLL) is performed between the transmission control unit (TC) and the transmission high-frequency unit (TH), and the PLL frequency division ratio of TC and the PLL of TH Block diagram showing a configuration in which the sum of the division ratios is equal (D / A at 20 MHz) ((a) The intermediate frequency (IF) is two, and the TC PLL division ratio and the TH PLL division ratio are set to cross, (B) The intermediate frequency (IF) is four, and the sum of the TC PLL frequency division ratio and the TH PLL frequency division ratio is equal.) FIG. 8B is a (plan 2) transmission control unit according to another embodiment of the present invention (plan 2). A block diagram (D / A at 30 MHz) showing a configuration in which the phase-locked loop (PLL) is performed between the TC) and the transmission high-frequency unit (TH), and the sum of the TC PLL frequency division ratio and the TH PLL frequency division ratio is equal ((30 MHz D / A)) a) Sum of TC PLL division ratio and TH PLL division ratio with two intermediate frequencies (IF) (B) The intermediate frequency (IF) is 4 and the sum of the PLL frequency division ratio of TC and the PLL frequency division ratio of TH is equal. In FIGS. 8A and 8B, 71 and 72 are D / A, Reference numerals 13 and 14 are common local oscillators CLO, 15 to 30 are phase locked loop PLLs, and 31 to 36 are MIXERs.

で、RFのミキサ構成をヘテロダインで周波数変換すると、ミキサのLo周波数はそれぞれ、

となる。PLLのREFクロックとして

（

は周波数偏差)を採用すると、PLLの逓倍数はぞれぞれ、107倍、101倍である。これより、周波数偏差は

（1系）、

（2系）となり、系統間の周波数差は

となってしまう。これが、50Hz以内であるためには、

（9)となり、これは0.83ppmに相当する。
このように、系統毎に異なるPLL分周比を用いたミキサ構成では系統間の周波数偏差が発生してしまう。 8A and 8B, when the heterodyne configuration is adopted, even if the Tc-Th PLL is performed, the frequency deviation between the systems is generated in the mixer configuration using a different PLL frequency division ratio for each system. . For example, assuming that the frequency deviation of the transmission control unit matches between systems, the deviation of only the high frequency unit is considered.

So, when the RF mixer configuration is frequency converted with heterodyne, the Lo frequency of the mixer is

It becomes. As REF clock of PLL

(

Is the frequency deviation), the multiplication factor of the PLL is 107 times and 101 times, respectively. From this, the frequency deviation is

(1 series),

(System 2), the frequency difference between systems is

End up. For this to be within 50Hz,

(9), which corresponds to 0.83 ppm.
Thus, in a mixer configuration using different PLL frequency division ratios for each system, a frequency deviation between systems occurs.

（

は周波数偏差)を採用すると、PLLの逓倍数はぞれぞれ、11、17倍であるため、周波数偏差は

（1系）、

（2系）となる。送信高周波部のREFクロックが送信制御部のREFクロックにPLLさせることを前提として、REFクロックは送信制御部と同様の

となる。送信高周波部のPLLの逓倍数は、送信制御部と逆に17、11倍に設定すると周波数偏差は

（1系）、

（2系）となる。以上のことから、1系の周波数偏差は

となり、2系の周波数偏差も

と1系と同値になる。このことから、相対的な周波数偏差は0となり、仕様を満足することができる。 Therefore, in (Scheme 2), the frequency deviation of each system can be made the same by performing the Tc-Th PLL as a configuration in which the PLL configuration of the transmission control unit and the transmission high-frequency unit are crossed. (The frequency difference between systems can be set to 0). The frequency deviation of this configuration will be described. As above, as the REF clock of the transmission control unit,

(

Frequency deviation), the PLL multiplication numbers are 11 and 17, respectively.

(1 series),

(2 series). Assuming that the REF clock of the transmission high-frequency unit is PLLed to the REF clock of the transmission control unit, the REF clock is the same as the transmission control unit.

It becomes. If the PLL multiplication factor of the transmission high-frequency part is set to 17 or 11 times contrary to the transmission control part, the frequency deviation will be

(1 series),

(2 series). From the above, the frequency deviation of system 1 is

And the frequency deviation of system 2 is

Equivalent to the 1 system. From this, the relative frequency deviation becomes 0, which satisfies the specification.

  The frequency shown in FIG. 8A (a) is selected so that multiplication of the mixer Lo frequency does not occur in the vicinity of the spectrum (provided that the frequency is 20 MHz or more away from the center frequency). Lo fundamental frequency 110MHz 2nd harmonic is 220MHz, 3rd harmonic is 330MHz, 4th harmonic is 440MHz Lo fundamental frequency 170MHz 2nd harmonic is 340MHz, 3rd harmonic is 510MHz, 4th harmonic Is 680MHz. None of these are located near the IF frequencies of 130MHz and 190MHz, so there is no problem.

  The operation will be described with reference to FIG. 9A, FIG. 9B, and FIG. 10, which are block diagrams showing a common Lo mixer configuration (of a system in which a common local is injected into the plan 3 mixer) according to another embodiment of the present invention. In this method, as shown in FIG. 9A, FIG. 9B and FIG. 10, the mixer Lo of the transmission control unit is made common among the systems inside the transmission control unit, and the mixer Lo of the transmission high frequency unit is connected to the system inside the transmission high frequency unit. When the frequency deviation occurs in the mixer LO signal by using the independent Lo for the transmission control unit and the transmission high frequency unit in common, the absolute value of the frequency deviation of each IF frequency is equalized between the systems. Set the relative frequency deviation to 0. Set frequency deviation between systems to zero. FIG. 11 shows an image of the frequency shift of FIG. 9A, 9B, and 10, 71, 72, 51, and 52 are D / A, 13 and 14 are common local oscillators CLO, 25 to 29 are phase locked loop PLLs, 31 to 36, and 87 to 87. Reference numeral 102 denotes a MIXER.

とし、ベースバンド信号を共通の周波数として

とする。また、ミキサLo周波数を

とすると、ミキサ出力周波数は、

(9)となる。ここで、符号はミキサLo周波数に対して＋は上側の周波数成分、−は下側の周波数成分を示している。共通周波数のベースバンド信号からそれぞれのIF信号を出力するためには、式（９）の符号を、＋と−をそれぞれ式(10)のように選択する。

(10) この式(10)から

を算出すると、

(11)となる。ここで、

とすると、

(12)であり、ミキサのLo周波数は160MHzとなる。この時のベースバンド周波数

は

(13)であり、30MHzとなる。
このように、IFミキサの周波数関係を式（12）（１3）のように選定することで、ミキサＬＯ信号に周波数偏差が生じた場合、各IF周波数の周波数偏差の絶対値は等しくなる。（相対偏差は0） In FIG. 9A, each IF frequency is

And baseband signal as a common frequency

And Also, mixer Lo frequency

Then, the mixer output frequency is

(9) Here, the reference sign indicates the upper frequency component and − indicates the lower frequency component with respect to the mixer Lo frequency. In order to output each IF signal from the baseband signal of the common frequency, the sign of Equation (9) is selected as + and − as shown in Equation (10), respectively.

(10) From this equation (10)

To calculate

(11) here,

Then,

(12), and the Lo frequency of the mixer is 160 MHz. Baseband frequency at this time

Is

(13), which is 30 MHz.
In this way, by selecting the IF mixer frequency relationship as shown in equations (12) and (13), when a frequency deviation occurs in the mixer LO signal, the absolute value of the frequency deviation of each IF frequency becomes equal. (Relative deviation is 0)

  Next, the extension to MIMO with four intermediate frequencies (IF) and antennas will be described with reference to FIG. 9B. In FIG. 9B, 3 of the frequency (10 MHz) of the common local oscillator CLO that is half the absolute value (30 MHz) of the absolute value of the difference between the first intermediate frequency IF1 (130 MHz) and the second intermediate frequency IF2 (190 MHz). A means for frequency-converting an OFDM modulated wave to the positive and negative phases of the double frequency 3CLO (30 MHz), and a signal obtained by frequency-converting the OFDM modulated wave to the positive and negative phases of the 3CLO (30 MHz) and the IF1 (130 MHz) Means of frequency conversion at 10CLO (100MHz), which is 10 times the frequency of common local oscillator CLO (10MHz), which is the average frequency (100MHz) of the third intermediate frequency IF3 (70MHz), and frequency conversion at 10CLO Means for taking out the lower sideband (70 MHz) of the received signal and the positive phase upper sideband (190 MHz) of the signal frequency-converted by the 10 CLO, and the CLO of the average frequency (160 MHz) of the IF2 and IF1 There is a difference between the means for frequency conversion at a frequency 16CLO which is 16 times the frequency (10MHz) Means for extracting lower sidebands of normal phase and negative phase of frequency (30 MHz and 90 MHz), means for frequency converting lower sidebands of positive phase and negative phase taken out by 16 CLO, and frequency conversion by 16 CLO IF3 (70MHz), IF1 (130MHz), which is the lower sideband of the positive phase of different frequencies (70MHz and 130MHz) of the received signal and the positive phase of the different frequency (190MHz and 250MHz) of the signal converted by the 16CLO A structure of means for taking out the IF2 (190 MHz) and the fourth intermediate frequency IF4 (250 MHz) as the upper side band, and IF1 (130 MHz) and IF2 (190 MHz) of the interlocked frequencies in the transmission high-frequency unit Means for frequency conversion of IF3 (70 MHz) and IF4 (250 MHz) at a frequency 16 CLO (160 MHz) of the phase-locked loop PLL 16 times the frequency of the CLO and under the opposite phase of the signal frequency-converted at the 16 CLO (30 MHz) Means for taking out the 3CLO (30 MHz) and 9CLO (90 MHz) of the sideband, and the taken out 3CLO (30 MHz) and 9CL Means for frequency-converting O (90 MHz) at 16 CLO (160 MHz), means for extracting the 7 CLO (70 MHz) and 13 CLO (130 MHz) of the lower sideband of the positive phase of the signal frequency-converted at 16 CLO (30 MHz) A means for frequency-converting the extracted 7CLO (70 MHz) and 13 CLO (130 MHz) at a frequency 10 CLO (100 MHz) of a phase-locked loop PLL that is 10 times the frequency of the CLO, and a signal obtained by frequency conversion at the 10 CLO (100 MHz) Means for extracting the 3CLO (30 MHz) in the lower sideband of the opposite phase of the signal, and means for frequency-converting the extracted 3CLO (30 MHz) at a frequency 117 CLO (1170 MHz) of the phase-locked loop PLL that is 117 times the frequency of the CLO And means for converting to the same high frequency RF (1200 MHz) in the upper sideband of the opposite phase of the signal frequency-converted by the 117 CLO.

    In this way, the mixer Lo of the transmission control unit is made common among the systems inside the transmission control unit, and the mixer Lo of the transmission high-frequency unit is made common among the systems inside the transmission high-frequency unit, so that the transmission control unit and the transmission high-frequency unit are shared. By using Lo which is independent from the unit, when a frequency deviation occurs in the mixer LO signal, the absolute value of the frequency deviation of each IF frequency becomes equal, thereby making the frequency relative deviation between systems zero. Furthermore, the frequency relationship of the common frequency conversion mixers between the systems is made symmetrical as described above, and the frequency conversion is repeated at 16 CLO (160 MHz), so that the frequency between the systems can be achieved even with MIMO with four intermediate frequencies (IF) and antennas. Realizing the relative deviation to be zero.

  Operation (plan 3) of another embodiment of the present invention using FIG. 10 of a block diagram showing a common Lo mixer configuration and FIG. 10 of a schematic diagram illustrating frequency shift of another embodiment of the present invention Will be explained. In FIG. 10, 71 and 72 are D / A, 13 and 14 are common local oscillators CLO, 15 to 30 are phase locked loop PLLs, and 31 to 36 are MIXERs.

(14) ここで、

とすることで、高周波部で一旦、同一のIF信号を生成する。このことを考慮すると、式(14)は式(15)となる。

(15)式(15)より、左右の項が正の値の場合には、式(15)を満足する解はない。従って、一方が負の周波数となるように考える。一般的に、負周波数は

(16)である。ここで、上線付の記号はスペクトルが反転することを意味している。 The mixer of the high frequency part also represents the frequency relationship of the mixer in the same manner as the equation (9).

(14) where

By doing so, the same IF signal is once generated in the high-frequency unit. Considering this, equation (14) becomes equation (15).

(15) From equation (15), when the left and right terms are positive values, there is no solution that satisfies equation (15). Therefore, one side is considered to have a negative frequency. In general, the negative frequency is

(16). Here, an overlined symbol means that the spectrum is inverted.

(17)式(17)において、

とし、符号の組み合わせを考えると、Lo周波数

は、30MHzと160MHzの二通りが考えられる。

(18) Considering the negative frequency, let us consider a case where the left side in Equation (15) is a negative frequency.

(17) In equation (17),

And considering the combination of codes, the Lo frequency

There are two possible ways: 30MHz and 160MHz.

(18)

を考える。IF周波数が同一になるように式(14)の符号を選定すると、

(19)となり、IF周波数は160MHzが得られる。 First,

think of. When the sign of equation (14) is selected so that the IF frequency is the same,

(19), and the IF frequency is 160 MHz.

とし、IF周波数が同一になるように式(14)の符号を選定すると、

となり、IF周波数は30MHzが得られる。 next,

And select the sign of equation (14) so that the IF frequencies are the same:

Thus, the IF frequency is 30 MHz.

Since a common IF frequency is obtained by the above-described frequency conversion by the mixer, the subsequent frequency conversion may be performed by a normal single superheterodyne. However, since the frequency of 30 MHz in (ii) is low and it is difficult to realize an image removal filter after the mixer, it is desirable to select 160 MHz as the IF signal.
With the above mixer configuration, it is possible to match frequency deviations between systems without mounting a PLL in the transmission control unit and the transmission high-frequency unit.

The operation will be described with reference to FIG. 12A, FIG. 12B and FIG. 12C, which are block diagrams showing a common Lo D / A configuration and a common Lo mixer configuration according to another embodiment of the present invention. 12A, 12B, and 12C, (a) is a configuration for D / A at a frequency of a common 16 CLO (160 MHz) multiplied (320 MHz, 480 MHz, 640 MHz, 800 MHz, or 1040 MHz), and (b) is IF1 ( 130 MHz) and IF2 (190 MHz) D / A at a common frequency (3040 MHz). (C) 4x4 MIMO, D / A at a frequency of 16CLO (160MHz) common (480MHz, 640MHz, 800MHz or 960MHz) in the transmission control unit (TC), and 16CLO (160MHz) common in the transmission high frequency unit (TH) A / D is performed at the multiplied frequency, D / A is performed again, 16CLO (160 MHz) or 32 CLO (320 MHz) is converted to 1200 MHz at 104 CLO (1040 MHz). (D) D / A is performed at a frequency multiplied by a common 16 CLO (160 MHz) in the transmission control unit (TC) in 4 × 4 MIMO, and A / D is performed at a frequency multiplied by a common 16 CLO (160 MHz) in the transmission high frequency unit (TH). It is configured to D / A at 240 CLO (2400 MHz) and convert to 1200 MHz. (E) 4x4 MIMO, D / A at the frequency of multiplication (480MHz, 640MHz, 800MHz or 960MHz) of common 16CLO (160MHz) in the transmission control unit (TC), and common 16CLO (160MHz) in the transmission high frequency unit (TH) MIX, 30MHz / 90MHz extraction, 160MHz mixing, 130MHz / 70MHz extraction, 100MHz mixing, 30MHz extraction, 1070MHz mixing, 1200MHz extraction.
12A, 12B, and 12C, 51, 52, 71, and 76 are D / A, 77 to 80 are A / D, and 13 and 14 are common local oscillators CLO. Reference numeral 56 denotes a phase locked loop PLL, and 31 to 36, 57 to 62, and 87 to 102 are MIXERs.

  12A, 12B, and 12C, the transmission control unit has a frequency (30 MHz) that is half the absolute value of the difference between the first intermediate frequency IF1 (130 MHz) and the second intermediate frequency IF2 (190 MHz). Means to convert the frequency of the OFDM modulated wave in the digital domain to the positive and negative phases of the frequency 3CLO (30MHz), which is three times the frequency of the common local oscillator CLO (10MHz), and to the positive and negative phases of the 3CLO (30MHz) Means for frequency-converting a signal obtained by frequency-converting an OFDM modulated wave in a digital domain with a common frequency 16CLO that is 16 times the frequency (10 MHz) of the CLO, which is an average frequency (160 MHz) of the IF2 and the IF1, and the common frequency 16CLO IF1 (130 MHz), which is the lower sideband of the opposite phase of the signal frequency-converted in, and IF2 (190 MHz), the upper sideband of the positive phase of the signal frequency-converted at the common frequency 16 CLO, are extracted in the digital domain. And frequency conversion at the common frequency of 16 CLO and taking out in the digital domain IF1 (130 MHz) and IF2 (190 MHz) are multiplied by the common frequency 16 CLO (160 MHz) (320 MHz or 480 MHz or 640 MHz or 800 MHz or 960 MHz or 1120 MHz) or the IF1 (130 MHz) and the IF2 (190 MHz) Configuration of means for digital / analog conversion (D / A) at common frequency (3040MHz), first intermediate frequency IF1 (130MHz), second intermediate frequency IF2 (190MHz) and third intermediate frequency IF3 (70 MHz) and a fourth intermediate frequency IF4 (250 MHz) means for converting the frequency of an OFDM-modulated wave in the digital domain, and the plurality of intermediate frequencies of any one of the configurations are digitalized at a common frequency multiplied by the CLO Means for performing digital / analog conversion (D / A) by frequency conversion in a region and using the common frequency of the common frequency multiplied by the common frequency of the CLO or the common frequency of the common multiple of the plurality of intermediate frequencies Configuration and Having.

  FIG. 12A, FIG. 12B, and FIG. 12C show that a plurality of intermediate frequencies (IF1 (130 MHz), IF2 (190 MHz), IF3 (70 MHz), and IF4 (250 MHz)) of the linked frequencies are linked to the transmission high-frequency unit. Analog / digital conversion (A / D) and digital / analog conversion (D / A) at a frequency (64CLO (640MHz), 80CLO (800MHz) or 96CLO (960MHz)) multiplied by the frequency of the common local oscillator CLO Means for converting to a frequency 16NCLO (160 MHz or 320 MHz) multiplied by 16 times the frequency of the CLO, and the converted 16N CLO at a frequency 104CLO (1040 MHz) or 88 CLO (880 MHz) 104 times or 88 times the frequency of the CLO The structure of the means for converting to the same radio frequency (RF) (1200 MHz), and the transmission high-frequency part, IF1 (130 MHz), IF2 (190 MHz), IF3 (70 MHz) and IF4 (250 MHz) of the linked frequency The phase lock loop PLL frequency 16CLO is 16 times the CLO frequency. 160 MHz), a means for taking out the 3CLO (30 MHz) and 9CLO (90 MHz) of the lower sideband of the opposite phase of the signal frequency-converted at 16 CLO (30 MHz), and the taken out 3CLO (30 MHz) Means for frequency-converting 9CLO (90 MHz) with the 16 CLO (160 MHz) and means for extracting the 7 CLO (70 MHz) and 13 CLO (130 MHz) of the lower sideband of the positive phase of the signal frequency-converted with the 16 CLO (30 MHz) Then, the extracted 7 CLO (70 MHz) and 13 CLO (130 MHz) are frequency-converted by means of the 10 CLO (100 MHz) and the means for converting the frequency at a frequency 10 CLO (100 MHz) of the phase-locked loop PLL 10 times the CLO frequency. Means for extracting the 3CLO (30 MHz) of the lower sideband of the opposite phase of the signal, and frequency-converting the extracted 3CLO (30 MHz) with the frequency 117 CLO (1170 MHz) of the phase-locked loop PLL that is 117 times the frequency of the CLO And the same high frequency RF (1200 And a means for frequency conversion of the interlocked frequencies IF1 and IF2 at a frequency 3CLO (30 MHz) of a phase-locked loop PLL three times the frequency of the CLO, and a frequency conversion by the 3CLO. Means for extracting 16 CLO (160 MHz) of the lower sideband of the obtained signal and 16 CLO (90 MHz) of the upper sideband of the signal frequency-converted by the 3CLO, and the extracted 16 CLO (160 MHz) of 104 times the frequency of the CLO. Configuration of means for frequency conversion at a frequency of 104 CLO (1040 MHz) of a phase locked loop PLL and means for extracting the same high frequency RF (1200 MHz) which is the upper side band of the signal frequency-converted by the 104 CLO, and the interlocked frequency Means for converting the frequency of IF1 and IF2 at a frequency 16CLO (160 MHz) of a phase-locked loop PLL 16 times the frequency of the CLO, which is the average frequency (160 MHz) of the interlocked frequencies IF1 and IF2, and the frequency at the 16CLO 3CLO (30MHz) in the lower sideband of the converted signal And means for converting the extracted 3CLO (30 MHz) at a frequency 117 CLO (1170 MHz) of a phase-locked loop PLL that is 117 times the frequency of the CLO, and an upper side band of the signal frequency-converted by the 117 CLO. A configuration for extracting the same high frequency RF (1200 MHz); and a configuration for converting the plurality of intermediate frequencies of any one of the configurations at a common frequency multiplied by the CLO.

  That is, the present invention includes a transmission high-frequency unit that transmits different modulated data signals from a plurality of antennas at the same radio frequency (RF) (1200 MHz) by the OFDM method, a single intermediate frequency cable, and a transmission control unit. In the transmission device having means for transmitting the intermediate frequency of the transmission control unit from the transmission control unit to the transmission high-frequency unit using the single cable, an OFDM modulated wave is transmitted to the transmission control unit in the first of the common local oscillator CLO. Means for converting the frequency into a plurality of intermediate frequencies at a multiplied frequency, and converting the plurality of intermediate frequencies into the same high frequency RF (1200 MHz) at the second multiplied frequency of the CLO in the transmission high-frequency unit Means for making the same radio frequency (RF) of different modulated data signals transmitted from the plurality of antennas interlock with the frequency (10 MHz) of the CLO.

  Therefore, in the present invention, when a frequency deviation occurs in the mixer LO signal by using Lo common between the systems, the absolute value of the frequency deviation of each IF frequency becomes equal, thereby reducing the frequency relative deviation between the systems to 0. To. Therefore, the ratio that the same radio frequency (RF) of different modulated data signals transmitted from the plurality of antennas is linked to the frequency (10 MHz) of the CLO becomes equal, and a relatively low-cost crystal (with a deviation of 1 ppm). Using an oscillator, the OFDM modulation wave is converted to the same high frequency RF (1200MHz) with high frequency tolerance of radio frequency (RF ARIB specification 50Hz), and different modulation from multiple antennas at the same frequency A data signal can be transmitted stably.

1: transmission control unit, 2: transmission high frequency unit, 3-10: antenna, 11: reception high frequency unit, 12: reception control unit, 51-52, 71-76: D / A, 77-80: A / D 13, 14: Common local oscillator CLO, 15-30, 53-56: Phase-locked loop PLL, 31-36, 57-62, 87-102: MIXER, 37: MOD (FPGA), 38: PLL control ( (FPGA), 39: PLL control (CPLD), 40, 41: CPU, 42, 43: PxC, 44: Clock distributor (CLKDIV), 45: LVDS-DRIVER, 46: LVDS-RECEIVER, 47, 48, 81- 86: LPF,

Claims (4)

A transmission high-frequency unit that transmits different modulated data signals from a plurality of antennas at the same radio frequency by the OFDM method, a single intermediate frequency cable, and a transmission control unit, and transmits a plurality of intermediate frequencies from the transmission control unit to the transmission high-frequency unit. In the transmitting apparatus having means for transmitting using the single cable toward the transmission, the transmission control unit includes a frequency that is half the absolute value of the difference between the first intermediate frequency IF1 and the second intermediate frequency IF2. Means for converting the frequency of the OFDM modulated wave to the positive and negative phases of the frequency 3CLO, which is three times the frequency of the common local oscillator CLO, and the signal obtained by converting the frequency of the OFDM modulated wave to the positive and negative phases of the 3CLO And means for frequency conversion at a frequency 10CLO that is 10 times the frequency of the common local oscillator CLO, which is the average frequency of the third intermediate frequency IF3, and the lower sideband of the signal frequency-converted by the 10CLO and the 10CLO Zhou Means for taking out the upper phase band of the positive phase of the number-converted signal, means for frequency conversion at a frequency 16CLO which is 16 times the frequency of the CLO which is the average frequency of the IF2 and IF1, and a signal frequency-converted by the 16CLO Means for taking out the lower sidebands of the positive and negative phases of different frequencies, means for converting the lower sidebands of the taken out positive and negative phases with the 16CLO, and signals converted by the 16CLO. Means for extracting the IF2 and the fourth intermediate frequency IF4, which are the positive phase upper sidebands of different frequencies of the signals frequency-converted by the IF3 and IF1 and the 16CLO, which are the lower sidebands of the positive phase of different frequencies The frequency of 3CLO is 3 times the frequency of the common local oscillator CLO, which is half the absolute value of the difference between the first intermediate frequency IF1 and the second intermediate frequency IF2. Means for frequency conversion of modulated wave and OFDM modulated wave in the positive and negative phases of 3CLO Means for converting the frequency-converted signal at a frequency 16CLO that is 16 times the frequency of the CLO, which is the average frequency of the IF2 and IF1, and the lower sideband of the opposite phase of the signal frequency-converted by the 16CLO Configuration of means for taking out IF2 which is a positive phase upper side band of a signal frequency-converted by IF1 and 16CLO, or a plurality of means for frequency-converting an OFDM modulated wave to frequency NCLO which is a multiple of the frequency of CLO And a plurality of signals obtained by frequency-converting OFDM modulated waves into the NCLO and the difference between the plurality of intermediate frequencies (IF1 and IF2 or IF1 and IF2, third intermediate frequency IF3 and fourth intermediate frequency IF4) and the NCLO It is a positive phase upper sideband of multiple signals frequency-converted at a frequency that is a multiple of the CLO that is a frequency (11CLO and 17CLO or 11CLO and 17CLO and 5CLO and 23CLO or 10CLO and 16CLO or 10CLO and 16CLO and 4CLO and 22CLO) A plurality of means for extracting the plurality of intermediate frequencies; Analog / digital at a frequency (64 CLO or 80 CLO or 96 CLO) multiplied by the frequency of the common local oscillator CLO linked to the plurality of intermediate frequencies (IF1, IF2, IF3 and IF4) of the linked frequency Means for converting and digital / analog conversion (D / A) to convert the frequency to 16NCLO which is 16 times the frequency of the CLO and the converted 16N CLO to a frequency 104CLO or 88CLO which is 104 times or 88 times the frequency of the CLO And having a means for converting to the same radio frequency, and converting the plurality of intermediate frequencies of any one of the configurations by a frequency multiplied by the frequency of the CLO and extracting it at a frequency linked to the frequency of the CLO A plurality of means, and the transmission high-frequency unit, the interlocked frequency transmitted using the single cable, the plurality of intermediate frequencies by a frequency multiplied by the frequency of the CLO Means for converting the wave number to the same radio frequency and means for transmitting the converted same radio frequency from the plurality of antennas, each of the different modulated data signals transmitted from the plurality of antennas The transmission apparatus is characterized in that the same radio frequency is linked with the CLO frequency at the same rate.   2. The transmission device according to claim 1, wherein the transmission high-frequency unit includes IF1, IF2, IF3, and IF4 of the interlocked frequencies at a frequency 16CLO of a phase-locked loop PLL that is 16 times the frequency of the CLO. Means for frequency conversion, means for extracting the 3CLO and 9CLO in the lower sideband of the phase opposite to the frequency converted by the 16CLO, means for converting the extracted 3CLO and 9CLO by the 16CLO, and frequency by the 16CLO Means for extracting the 7CLO and 13CLO in the lower sideband of the positive phase of the converted signal, and frequency-converting the extracted 7CLO and 13CLO with the frequency 10CLO of the phase-locked loop PLL that is 10 times the frequency of the CLO Means for extracting the 3CLO in the lower sideband of the opposite phase of the signal frequency-converted by the 10CLO, and means for frequency-converting the extracted 3CLO by the frequency 117CLO of the phase-locked loop PLL that is 117 times the frequency of the CLO And frequency change with 117CLO The means for converting to the same high frequency RF in the upper sideband of the opposite phase of the converted signal, and the IF1 and IF2 of the linked frequency in the transmission high-frequency unit is three times the frequency of the CLO Means for converting the frequency at the frequency 3CLO of the phase-locked loop PLL, 16CLO for the lower sideband of the signal frequency-converted by the 3CLO, and means for extracting the 16CLO of the upper sideband of the signal frequency-converted by the 3CLO; and the extracted 16CLO A means for converting the frequency at a frequency 104CLO of a phase-locked loop PLL 104 times the frequency of the CLO and a means for extracting the same high frequency RF that is the upper sideband of the signal frequency-converted by the 104CLO; and A means for frequency-converting IF1 and IF2 of the interlocked frequencies to a transmission high-frequency unit at a frequency 16CLO of a phase-locked loop PLL that is 16 times the frequency of the CLO that is an average frequency of the IF1 and IF2 of the interlocked frequencies; Frequency converted with 16CLO Means for extracting the 3CLO of the lower sideband of the signal, means for converting the extracted 3CLO at the frequency 117CLO of the phase-locked loop PLL that is 117 times the frequency of the CLO, and the upper sideband of the signal frequency-converted by the 117CLO A means for extracting the same high frequency RF, and a means for causing the common local oscillator of the transmission control unit and the common local oscillator of the transmission control unit to interlock with each other by a phase locked loop PLL, Means for frequency-converting an OFDM modulated wave to a frequency NCLO multiplied by the frequency of the common local oscillator CLO linked to the transmission control unit, and a signal obtained by frequency-converting the OFDM modulated wave to the NCLO, the plurality of intermediate frequencies (IF1 And IF2 or IF1 and IF2 and the third intermediate frequency IF3 and fourth intermediate frequency IF4) and the frequency of the difference between the NCLO (11CLO and 17CLO or 11CLO and 17CLO and 5CLO and 23CLO or 10CLO and 16CLO or 10CLO and 16CLO and 4CLO and 22CLO) Means for taking out the plurality of intermediate frequencies which are positive-phase upper sidebands of a signal frequency-converted at a double frequency, and the plurality of intermediate frequencies (IF1 and IF2 or IF2 or IF1, IF2, IF3 and IF4) means for frequency conversion at a frequency (17CLO and 11CLO or 17CLO and 11CLO, 23CLO and 5CLO) of the frequency of the common local oscillator CLO linked to the above and the frequency multiplication of the CLO Means for extracting a frequency 30CLO which is 30 times the frequency of the CLO which is the upper sideband of the signal frequency-converted by frequency, and the frequency conversion of the extracted 30CLO by a frequency 90CLO of a phase-locked loop PLL which is 90 times the frequency of the CLO And a common local oscillator of the transmission control unit and a common local transmitter of the transmission control unit are linked with each other by a phase locked loop PLL. The transmission high-frequency unit is linked to the same high frequency RF and the frequency of a frequency of the linked common local oscillator CLO multiplied by the frequency of the difference between a plurality of intermediate frequencies of the linked frequency. A transmission apparatus comprising: a configuration having means for directly converting and extracting a plurality of intermediate frequency frequencies into the same high frequency RF.   3. The configuration of any one of the transmission device according to claim 1 or the transmission device according to claim 2, wherein the transmission control unit includes a frequency that is half the absolute value of the difference between the first intermediate frequency IF1 and the second intermediate frequency IF2. The frequency of the OFDM modulated wave is converted to the positive and negative phases of the 3CLO in the digital domain, and the frequency of the OFDM modulated wave to the positive and negative phases of the 3CLO is 3 times the frequency of the common local oscillator CLO. Means for frequency-converting the signal in the digital domain at a common frequency 16CLO which is 16 times the frequency of the CLO, which is the average frequency of the IF2 and IF1, and a lower sideband of the opposite phase of the signal frequency-converted at the common frequency 16CLO IF1 and IF2 which is the upper phase band of the positive phase of the signal frequency-converted at the common frequency 16CLO, and IF1 and IF2 frequency-converted at the common frequency 16CLO and extracted in the digital domain And the common frequency of 16 CLO The structure of the means for digital / analog conversion at the frequency of multiplication or the common frequency of the common multiplication of IF1 and IF2, the first intermediate frequency IF1, the second intermediate frequency IF2, the third intermediate frequency IF3 and the fourth Means for frequency-converting an OFDM-modulated wave to the intermediate frequency IF4 in the digital domain, and frequency-converting the plurality of intermediate frequencies in any one of the configurations in the digital domain at a common frequency multiplied by the CLO. A means for digital / analog conversion at a common frequency of either one of the common frequency multiplied by the common frequency or the common frequency common frequency of the plurality of intermediate frequencies, and the transmission high-frequency unit, A plurality of intermediate frequencies (IF1, IF2, IF3, and IF4) of the linked frequencies are analog / multiplied by a frequency (64CLO or 80CLO or 96CLO) multiplied by the frequency of the linked common local oscillator CLO. Means for digital conversion, digital / analog conversion, and conversion to a frequency 16NCLO multiplied by 16 times the frequency of the CLO, and the converted 16N CLO at the frequency 104CLO or 88CLO that is 104 times or 88 times the frequency of the CLO. Configuration of means for converting to radio frequency, and means for frequency-converting IF1, IF2, IF3, and IF4 of the interlocked frequencies to a frequency 16CLO of a phase-locked loop PLL that is 16 times the frequency of the CLO And means for extracting the 3CLO and 9CLO in the lower sideband of the phase opposite to that of the signal frequency-converted by the 16CLO, means for frequency-converting the extracted 3CLO and 9CLO by the 16CLO, and the signal frequency-converted by the 16CLO Means for taking out the 7CLO and 13CLO of the lower sideband of the positive phase, means for frequency-converting the taken out 7CLO and 13CLO with a frequency 10CLO of a phase-locked loop PLL that is 10 times the frequency of the CLO, and the 10CLO Frequency converted with Means for extracting the 3CLO in the lower sideband of the opposite phase of the signal; means for converting the extracted 3CLO at a frequency 117CLO of a phase-locked loop PLL that is 117 times the frequency of the CLO; and a signal frequency-converted by the 117CLO And the means for converting to the same high-frequency RF in the upper sideband of the opposite phase of the frequency, and the IF1 and IF2 of the interlocked frequency is a frequency 3CLO of the phase-locked loop PLL three times the frequency of the CLO Means for converting, means for extracting 16CLO of the lower sideband of the signal frequency-converted by the 3CLO, and 16CLO of the upper sideband of the signal frequency-converted by the 3CLO, and the extracted 16CLO is 104 times the frequency of the CLO. A structure of means for converting the frequency at the frequency 104CLO of the phase-locked loop PLL and means for extracting the same high frequency RF that is the upper side band of the signal frequency-converted by the 104CLO, and IF1 and IF2 of the interlocked frequencies IF of the linked frequency Means for frequency conversion at a frequency 16CLO of a phase-locked loop PLL 16 times the frequency of the CLO, which is the average frequency of 1 and IF2, means for extracting the 3CLO of the lower sideband of the signal frequency-converted by the 16CLO, and the extraction And a means for frequency-converting the 3CLO at a frequency 117CLO of a phase-locked loop PLL that is 117 times the frequency of the CLO and a means for extracting the same high-frequency RF that is the upper sideband of the signal frequency-converted by the 117CLO A transmission apparatus comprising: means for converting the frequency of the plurality of intermediate frequencies of any one of the configurations at a common frequency multiplied by the CLO. A transmission high-frequency unit that transmits different modulated data signals from a plurality of antennas at the same radio frequency by the OFDM method, a single intermediate frequency cable, and a transmission control unit, and transmits a plurality of intermediate frequencies from the transmission control unit to the transmission high-frequency unit. In the transmitter having means for transmitting using the single cable toward the transmitter, the transmission control unit converts the OFDM modulated wave to the plurality of intermediate frequencies at a frequency multiplied by the first set of the common local oscillator CLO. Means for converting the frequency, and means for converting the plurality of intermediate frequencies to the same high frequency RF at a frequency multiplied by the second set of the CLO in the transmission high-frequency unit, and transmitting from the plurality of antennas A transmission apparatus characterized in that the same radio frequency of different modulated data signals is made to be equal in proportion to the CLO frequency.

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