CN106877946B - High-performance channel simulator automatic control receiver and verification device thereof - Google Patents
High-performance channel simulator automatic control receiver and verification device thereof Download PDFInfo
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- CN106877946B CN106877946B CN201710032823.6A CN201710032823A CN106877946B CN 106877946 B CN106877946 B CN 106877946B CN 201710032823 A CN201710032823 A CN 201710032823A CN 106877946 B CN106877946 B CN 106877946B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
- H04B17/0087—Monitoring; Testing using service channels; using auxiliary channels using auxiliary channels or channel simulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
- H04B17/327—Received signal code power [RSCP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
- H04B17/3911—Fading models or fading generators
Abstract
The invention relates to the technical field of communication, in particular to an automatic control receiver of a high-performance channel simulator and a verification device thereof, which are characterized in that: the system also comprises a radio frequency variable attenuation unit, a broadband coupling unit, a radio frequency demodulation unit, a detection unit, an operational amplifier unit, a local oscillator unit and a main control unit; the main control unit is internally provided with a storage unit for storing the optimal power values corresponding to various frequencies and controlling the detection unit and the local oscillation unit. Compared with the prior art, the invention does not need to preset the receiving power in advance, can automatically adjust the level of the access, ensures that the receiver is stabilized in the optimal working state, has the characteristics of wide frequency band, large dynamic, automation and the like, is very simple and convenient to use, is precise and high, and has excellent market popularization.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an automatic control receiver of a high-performance channel simulator and a verification device thereof.
Background
With the increase of the demand of human beings for communication and the national support of the communication industry, the wireless communication technology is rapidly developed. The wireless communication channel environment is complex, and there are characteristics that affect the communication quality, such as multipath fading, delay spread, and doppler fading. The increasingly complex wireless communication environment presents difficulties in designing and developing high quality wireless communication systems. In the development of communication systems, the disadvantages of the wireless channel need to be fully considered. The channel simulator has a good approximate simulation effect on the wireless channel, and the wireless channel simulator is adopted to simulate a real wireless channel environment, so that the overall development period of the base station and the terminal can be greatly shortened, and a large number of external field tests are reduced.
In a system of a channel simulator, three parts are mainly included: transmitter, receiver and master control unit. The receiver receives the signal and demodulates it into a baseband signal. The baseband signal is transmitted to the transmitter by the main control unit after a series of channel simulation algorithms. The specific hardware structure and application scenario are shown in fig. 1.
In the use process of the channel simulator, the power of the received signal is generally required to inform the channel simulator. The receiver changes the power distribution in the receiver path through corresponding calculation, so that the channel simulation path is more reasonable, and the optimal working state of the channel simulator is achieved through the mode.
It can be seen that, in general channel simulators, there is a process of presetting a value, and a receiver cannot automatically judge and identify the size of a received signal, so as to adaptively change the power allocation of a communication link.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a receiver which does not need to preset the power of a received signal, only needs to calibrate the optimal power value according to the corresponding frequency and input the optimal power value into a main control unit in advance and can automatically adjust the path attenuation according to the size of the received signal to achieve the optimal working state.
In order to achieve the purpose, the automatic control receiver of the high-performance channel simulator is designed, and comprises a main control unit and is characterized in that:
the system also comprises a radio frequency variable attenuation unit, a broadband coupling unit, a radio frequency demodulation unit, a detection unit, an operational amplifier unit, a local oscillator unit and a main control unit;
the radio frequency variable attenuation unit is used for distributing the power of the received broadband radio frequency signal from the base station or the terminal and then sending the broadband radio frequency signal to the broadband coupling unit;
the broadband coupling unit is used for transmitting more than or equal to 80% of energy in the received broadband radio-frequency signal to the radio-frequency demodulation unit and outputting the rest energy to the detection unit;
the radio frequency demodulation unit is used for demodulating the signals received from the broadband coupling unit into analog signals I and analog signals Q and outputting the analog signals I and Q;
the detection unit is used for detecting the signal received from the broadband coupling unit to obtain corresponding detection voltage, sending the detection voltage to the main control unit, comparing the detection voltage with the corresponding voltage of the corresponding optimal power value recorded in the main control unit to obtain error voltage, and sending the error voltage obtained by feedback from the main control unit to the operational amplifier unit;
the operational amplifier unit is used for acquiring an error voltage value from the detection unit, and then driving and controlling the radio frequency variable attenuation unit to change the attenuation of the radio frequency variable attenuation unit, so that the power values of two output ports of the broadband coupling unit are changed;
the local oscillator unit is controlled by the main control unit and is used for providing corresponding local oscillator signals for the radio frequency demodulation unit;
the main control unit is internally provided with a storage unit for storing the optimal power values corresponding to various frequencies and controlling the detection unit and the local oscillation unit.
The input frequency of the radio frequency variable attenuation unit is 0.4-6 GHz, and the input power is dynamic-60- +15 dBm.
The radio frequency variable attenuation unit comprises a plurality of radio frequency variable attenuators and a plurality of radio frequency amplifiers which are connected in series;
the broadband coupling unit adopts a broadband coupler; the input end of the broadband coupler is connected with the output end of the radio frequency variable attenuation unit;
the radio frequency demodulation unit comprises a radio frequency demodulator and low-pass filters respectively connected with two output ends of the radio frequency demodulator in series, and one input end of the radio frequency demodulator is connected with one output end of the broadband coupler;
the local oscillator unit adopts a local oscillator; the output end of the local oscillator is connected with the other input end of the radio frequency demodulator; the input end of the local oscillator is connected with one output end of the main control unit;
the detector unit comprises a diode serving as a detector and an adder connected with the cathode of the diode in series; the anode of the diode is connected with the other output end of the broadband coupling unit; one signal end of the adder is bidirectionally connected with one signal end of the main control unit;
the operational amplifier unit comprises an operational amplifier and a capacitor, wherein the inverting input end of the operational amplifier is divided into two paths, one path of the inverting input end is connected with one end of the capacitor, and the other path of the inverting input end is connected with the output end of the adder; the non-inverting input end of the operational amplifier is grounded; the output end of the operational amplifier is divided into two paths, one path of the output end of the operational amplifier is connected with the other end of the capacitor, and the other path of the output end of the operational amplifier is respectively connected with the rest leading-out ends of the potentiometers in the radio frequency variable attenuation unit.
When the radio frequency variable attenuation unit receives signals, the signals are processed by the broadband coupling unit and the detection unit in sequence and then are sent to the main control unit, the main control unit records the power value of the signals in the storage unit, and the power value is calculated according to the formula: and calculating the attenuation power value, wherein n is the number of the radio frequency variable attenuators connected in series in the radio frequency variable attenuation unit, m is the number of the radio frequency amplifiers connected in series in the radio frequency variable attenuation unit, Pi is the input power of the broadband coupling unit, and Po is the amplification power of the radio frequency amplifiers.
Replacing a radio frequency demodulation unit in the receiver with a frequency spectrograph, removing a local oscillator unit in the receiver, and checking an input signal in the radio frequency demodulation unit by using the frequency spectrograph, wherein the input signal in the radio frequency demodulation unit is an output signal of a broadband coupling unit.
Compared with the prior art, the invention does not need to preset the receiving power in advance, can automatically adjust the level of the access, ensures that the receiver is stabilized in the optimal working state, has the characteristics of wide frequency band, large dynamic, automation and the like, is very simple and convenient to use, is precise and high, and has excellent market popularization.
Drawings
Fig. 1 is a schematic structural diagram of a wireless channel simulator in an operating environment.
Fig. 2 is a schematic connection block diagram of the present invention.
Fig. 3 is a circuit connection block diagram in an embodiment of the invention.
Fig. 4 is a circuit connection block diagram in an embodiment of the invention.
Fig. 5 is a schematic connection block diagram of an embodiment of the present invention in which a spectrometer is used to verify the effect of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
Example 1
Referring to fig. 2, the high-performance channel simulator automatic control receiver of the present invention includes a main control unit, and is characterized in that:
the system also comprises a radio frequency variable attenuation unit, a broadband coupling unit, a radio frequency demodulation unit, a detection unit, an operational amplifier unit, a local oscillator unit and a main control unit;
the radio frequency variable attenuation unit is used for distributing the power of the received broadband radio frequency signal from the base station or the terminal and then sending the broadband radio frequency signal to the broadband coupling unit; referring to fig. 3, the rf variable attenuator unit in this example includes three rf variable attenuators and three rf amplifiers, each of the rf variable attenuators is connected in series with one of the rf amplifiers to form an attenuation unit, and the three attenuation units are connected in series.
The broadband coupling unit is used for transmitting more than or equal to 80% of energy in the received broadband radio-frequency signal to the radio-frequency demodulation unit and outputting the rest energy to the detection unit; the broadband coupling unit in this example adopts a broadband coupler; the input end of the broadband coupler is connected with the output end of the last radio frequency amplifier in the radio frequency variable attenuation unit;
the radio frequency demodulation unit is used for demodulating the signals received from the broadband coupling unit into analog signals I and analog signals Q and outputting the analog signals I and Q; the radio frequency demodulation unit in this example comprises a radio frequency demodulator and low pass filters respectively connected with two output ends of the radio frequency demodulator in series, wherein one input end of the radio frequency demodulator is connected with one output end of the broadband coupler;
the local oscillator unit is controlled by the main control unit and is used for providing corresponding local oscillator signals for the radio frequency demodulation unit; the local oscillator unit in this example adopts a local oscillator; the output end of the local oscillator is connected with the other input end of the radio frequency demodulator; the input end of the local oscillator is connected with one output end of the main control unit;
the detection unit is used for detecting the signal received from the broadband coupling unit to obtain corresponding detection voltage, sending the detection voltage to the main control unit, comparing the detection voltage with the corresponding voltage of the corresponding optimal power value recorded in the main control unit to obtain error voltage, and sending the error voltage obtained by feedback from the main control unit to the operational amplifier unit; the detector unit in this example comprises a diode as a detector and an adder connected in series with the cathode of the diode; the anode of the diode is connected with the other output end of the broadband coupling unit; one signal end of the adder is bidirectionally connected with one signal end of the main control unit;
the operational amplifier unit is used for acquiring an error voltage value from the detection unit, and then driving and controlling the radio frequency variable attenuation unit to change the attenuation of the radio frequency variable attenuation unit, so that the power values of two output ports of the broadband coupling unit are changed; the operational amplifier unit in this example comprises an operational amplifier and a capacitor, wherein the inverting input end of the operational amplifier is divided into two paths, one path of the inverting input end is connected with one end of the capacitor, and the other path of the inverting input end is connected with the output end of the adder; the non-inverting input end of the operational amplifier is grounded; the output end of the operational amplifier is divided into two paths, one path of the output end of the operational amplifier is connected with the other end of the capacitor, and the other path of the output end of the operational amplifier is respectively connected with the rest leading-out ends of the potentiometers in the radio frequency variable attenuation unit;
the main control unit is internally provided with a storage unit for storing the optimal power values corresponding to various frequencies and controlling the detection unit and the local oscillation unit.
In this example, the input frequency range of the channel simulator receiver is 0.4 to 6GHz, and the input power is dynamically-60 to +15 dBm.
In the design and development stage of the invention, the optimum power value corresponding to each frequency point is calibrated. Taking the best working state of the 1GHz receiver as an example, the input power of the corresponding radio frequency demodulation unit is 0dBm, and the 0dBm is converted into a corresponding control word and stored in the main control unit. Since the frequency has less influence on the invention, the frequency point is taken as an example:
in the radio frequency variable attenuation unit, the range of the adjustable attenuation of each radio frequency variable attenuator is 0-30 dB, and the fixed gain of each radio frequency amplifier is 20 dB;
when the receiver receives the signal, the master control unit records a power value Pi e [ -60, +15], in this case the rf variable attenuator unit uses 3 rf variable attenuators and 3 rf amplifiers, and the fixed gain of the rf amplifier used in this case is 20dB, so according to the formula: the optimal power value is Pi-3 multiplied by the attenuation power value +3 multiplied by 20, the attenuation power value belongs to [0, +25] can be calculated, the attenuation power value is in the range of 0-30 dB, and the design requirement can be met.
When the receiver receives an input signal of-60 dBm, the detection unit can automatically adjust the error between the optimal power value and the detection voltage, and the error is integrated by the operational amplifier unit and then the attenuation of the variable attenuator is adjusted until the power output to the radio frequency demodulation unit by the broadband coupling unit is stabilized to the optimal power value of 0 dBm;
when the receiver receives an input signal of +15dBm, the detection unit compares the error voltage, and finally the receiver is stabilized in an optimal working state.
Similarly, by changing the power of other input signals and changing other frequencies, the receiver of the present invention will automatically adjust the power level until the receiver is stabilized in an optimal operating state.
Example 2
The present embodiment is basically the same as embodiment 1, except that the rf variable attenuator unit is slightly adjusted, referring to fig. 4, in the present embodiment, three rf variable attenuators and 4 rf amplifiers are adopted, and the first rf variable attenuator is connected in series with the second rf variable attenuator, the first rf amplifier, the second rf amplifier, the third rf variable attenuator, the fourth rf amplifier, and the fifth rf amplifier in sequence.
Certainly, in order to prevent the damage of some large signals to the receiving circuit, the position of the first radio frequency variable attenuator is unchanged, and the positions of the following radio frequency variable attenuator and the radio frequency amplifier can be changed, that is, the first radio frequency variable attenuator is sequentially connected in series with the first radio frequency amplifier, the second radio frequency variable attenuator, the fourth radio frequency amplifier, the fifth radio frequency amplifier and the third radio frequency variable attenuator.
In this example, an amplifier is added, the input frequency range of the channel simulator receiver is 0.4 to 6GHz, and the input power is dynamic-60 to +15 dBm.
In the design and development stage, the optimal power value corresponding to each frequency point is calibrated. Taking 2GHz frequency point as an example, the input power of the corresponding radio frequency demodulation unit is 0dBm, and 0dBm is converted into a corresponding control word and stored in the main control unit. Since the frequency has less influence on the present invention, the dot frequency is taken as an example:
in the radio frequency variable attenuation unit, the range of the adjustable attenuation quantity of each radio frequency variable attenuator is 0 to 0dB, and the fixed gain of each radio frequency amplifier is 15 dB;
when the receiver receives the signal, the master control unit records a power value of Pi e [ -60, +15], according to the formula: the optimal power value is Pi-3 multiplied by the attenuation power value +4 multiplied by 15, the attenuation power value belongs to [0, +25] can be calculated, the attenuation power value is in the range of 0-30 dB, and the design requirement can be met.
When the receiver receives an input signal of-60 dBm, the detection unit can automatically adjust the error between the optimal power value and the detection voltage, and the error is integrated by the operational amplifier unit and then the attenuation of the variable attenuator is adjusted until the power output to the radio frequency demodulation unit by the broadband coupling unit is stabilized to the optimal power value of 0 dBm;
when the receiver receives an input signal of +15dBm, the detection unit compares the error voltage, and finally the receiver is stabilized in an optimal working state.
Example 3
Referring to fig. 5, in order to prove the effect of the present invention, the circuit designed by the present invention is verified as follows:
firstly, the optimal power value corresponding to the optimal state of the channel simulator receiver is calibrated. Take the optimal power value of 0dBm at 1GHz as an example. Simulating a signal received by a channel simulator receiver by using a signal source, and checking an input signal of a radio frequency demodulation unit, namely an output signal of a broadband coupling unit by using a frequency spectrograph; and connecting an output port of the signal source with an input port of the channel simulator receiver, connecting an output port of the broadband coupling unit of the channel simulator receiver with an input port of the frequency spectrograph, and removing the detection unit.
Then, the output frequency of the signal source is set to be 1GHz, the power is-60 dBm, and the modulation bandwidth is 20 MHz. Setting the center frequency of a frequency spectrograph to be 1GHz and the bandwidth to be 50MHz, and observing the frequency spectrum of a signal at the moment, measuring the bandwidth and the power of the signal at the moment by the frequency spectrograph, wherein the measurable bandwidth is 20MHz, and the output power is 0 dBm;
changing the input power of a signal source to be +15dBm, keeping other settings unchanged, checking the signal bandwidth and power measured by the frequency spectrograph at the moment, wherein the measured bandwidth is still 20MHz, and the channel power is still 0 dBm.
And other settings of the signal source are unchanged, the output power of the signal source is changed to any value from-60 dBm to +15dBm, data measured by the frequency spectrograph at the moment are checked, and the channel power of the measured signal is found to be almost unchanged.
The output frequency of the signal source is changed, the steps are repeated, the output power can be randomly changed from-60 dBm to +15dBm, and the signal power measured by the frequency spectrograph can be always stabilized at the optimal power value under the frequency.
The above tests demonstrate that the receiver of the present invention can automatically stabilize the received signal at an optimum power.
The invention is applied to the channel simulator receiver, obviously, the receiver can automatically adjust the circuit without informing the power of the input signal of the channel simulator, ensures that the channel simulator works in the optimal state, and has very convenient use, excellent regulation and control effect and very high practicability.
Claims (5)
1. A high-performance channel simulator automatic control receiver comprises a main control unit, and is characterized in that:
the system also comprises a radio frequency variable attenuation unit, a broadband coupling unit, a radio frequency demodulation unit, a detection unit, an operational amplifier unit, a local oscillator unit and a main control unit;
the radio frequency variable attenuation unit is used for distributing the power of the received broadband radio frequency signal from the base station or the terminal and then sending the broadband radio frequency signal to the broadband coupling unit;
the broadband coupling unit is used for transmitting more than or equal to 80% of energy in the received broadband radio-frequency signal to the radio-frequency demodulation unit and outputting the rest energy to the detection unit;
the radio frequency demodulation unit is used for demodulating the signals received from the broadband coupling unit into analog signals I and analog signals Q and outputting the analog signals I and Q;
the detection unit is used for detecting the signal received from the broadband coupling unit to obtain corresponding detection voltage, sending the detection voltage to the main control unit, comparing the detection voltage with the corresponding voltage of the corresponding optimal power value recorded in the main control unit to obtain error voltage, and sending the error voltage obtained by feedback from the main control unit to the operational amplifier unit;
the operational amplifier unit is used for acquiring an error voltage value from the detection unit, and then driving and controlling the radio frequency variable attenuation unit to change the attenuation of the radio frequency variable attenuation unit, so that the power values of two output ports of the broadband coupling unit are changed;
the local oscillator unit is controlled by the main control unit and is used for providing corresponding local oscillator signals for the radio frequency demodulation unit;
the main control unit is internally provided with a storage unit for storing the optimal power values corresponding to various frequencies and controlling the detection unit and the local oscillation unit.
2. A high performance channel simulator automatic control receiver as claimed in claim 1, characterized in that: the input frequency of the radio frequency variable attenuation unit is 0.4-6 GHz, and the input power is dynamic-60- +15 dBm.
3. A high performance channel simulator automatic control receiver as claimed in claim 1, characterized in that:
the radio frequency variable attenuation unit comprises a plurality of radio frequency variable attenuators and a plurality of radio frequency amplifiers which are connected in series;
the broadband coupling unit adopts a broadband coupler; the input end of the broadband coupler is connected with the output end of the radio frequency variable attenuation unit;
the radio frequency demodulation unit comprises a radio frequency demodulator and low-pass filters respectively connected with two output ends of the radio frequency demodulator in series, and one input end of the radio frequency demodulator is connected with one output end of the broadband coupler;
the local oscillator unit adopts a local oscillator; the output end of the local oscillator is connected with the other input end of the radio frequency demodulator; the input end of the local oscillator is connected with one output end of the main control unit;
the detector unit comprises a diode serving as a detector and an adder connected with the cathode of the diode in series; the anode of the diode is connected with the other output end of the broadband coupling unit; one signal end of the adder is bidirectionally connected with one signal end of the main control unit;
the operational amplifier unit comprises an operational amplifier and a capacitor, wherein the inverting input end of the operational amplifier is divided into two paths, one path of the inverting input end is connected with one end of the capacitor, and the other path of the inverting input end is connected with the output end of the adder; the non-inverting input end of the operational amplifier is grounded; the output end of the operational amplifier is divided into two paths, one path of the output end of the operational amplifier is connected with the other end of the capacitor, and the other path of the output end of the operational amplifier is respectively connected with the rest leading-out ends of the potentiometers in the radio frequency variable attenuation unit.
4. A high performance channel simulator automatic control receiver as claimed in claim 3, characterized in that: when the radio frequency variable attenuation unit receives signals, the signals are processed by the broadband coupling unit and the detection unit in sequence and then are sent to the main control unit, the main control unit records the power value of the signals in the storage unit, and the power value is calculated according to the formula: and calculating the attenuation power value, wherein n is the number of the radio frequency variable attenuators connected in series in the radio frequency variable attenuation unit, m is the number of the radio frequency amplifiers connected in series in the radio frequency variable attenuation unit, Pi is the input power of the broadband coupling unit, and Po is the amplification power of the radio frequency amplifiers.
5. An apparatus for validating a high performance channel simulator automatic control receiver as claimed in any one of claims 1 to 4, characterized in that: replacing a radio frequency demodulation unit in the receiver with a frequency spectrograph, removing a local oscillation unit in the receiver, and checking an input signal in the radio frequency demodulation unit by using the frequency spectrograph, wherein the input signal in the radio frequency demodulation unit = an output signal of the broadband coupling unit.
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| CN107370471B (en) * | 2017-06-29 | 2020-06-05 | 中国电子科技集团公司第四十一研究所 | PXI bus programmable amplifier/attenuator and calibration method thereof |
| CN109951244B (en) * | 2017-12-21 | 2023-05-09 | 东南大学 | Power measurement and radio frequency receiving gain control method applied to channel simulator |
| CN109302242B (en) * | 2017-12-26 | 2022-11-22 | 上海创远仪器技术股份有限公司 | TDD (time division duplex) bidirectional implementation method of MIMO (multiple input multiple output) channel simulator |
| CN112600629B (en) * | 2020-12-14 | 2023-05-02 | 东南大学 | Method and system for realizing power calibration and data processing of radio frequency receiver of MIMO channel simulator |
| CN116209049B (en) * | 2023-05-04 | 2023-06-30 | 中国人民解放军国防科技大学 | Full-link signal power self-adaptive optimization method for intelligent channel simulator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5918184A (en) * | 1992-09-21 | 1999-06-29 | Lucent Technologies Inc. | Method and apparatus for detecting a supervisory audio tone |
| US6058261A (en) * | 1993-10-29 | 2000-05-02 | Nokia Mobile Phones Limited | RF channel simulator |
| CN1426053A (en) * | 2001-12-10 | 2003-06-25 | 建碁股份有限公司 | Laser output power control method for optical disc drive, optical disc drive and computer system |
| CN202503481U (en) * | 2012-01-12 | 2012-10-24 | 上海创远仪器技术股份有限公司 | Broadband amplifier circuit device |
| CN103248444A (en) * | 2013-05-16 | 2013-08-14 | 中国电子科技集团公司第四十一研究所 | System integration device and system integration method for test parameters based on unit combination |
| CN103986488A (en) * | 2014-05-06 | 2014-08-13 | 东南大学 | Broadband radio frequency receiver of high-performance LTE channel simulator |
| CN105372618A (en) * | 2015-12-15 | 2016-03-02 | 国家电网公司 | 500kV voltage transformer check power source multi-stage reactive power compensation system |
-
2017
- 2017-01-18 CN CN201710032823.6A patent/CN106877946B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5918184A (en) * | 1992-09-21 | 1999-06-29 | Lucent Technologies Inc. | Method and apparatus for detecting a supervisory audio tone |
| US6058261A (en) * | 1993-10-29 | 2000-05-02 | Nokia Mobile Phones Limited | RF channel simulator |
| CN1426053A (en) * | 2001-12-10 | 2003-06-25 | 建碁股份有限公司 | Laser output power control method for optical disc drive, optical disc drive and computer system |
| CN202503481U (en) * | 2012-01-12 | 2012-10-24 | 上海创远仪器技术股份有限公司 | Broadband amplifier circuit device |
| CN103248444A (en) * | 2013-05-16 | 2013-08-14 | 中国电子科技集团公司第四十一研究所 | System integration device and system integration method for test parameters based on unit combination |
| CN103986488A (en) * | 2014-05-06 | 2014-08-13 | 东南大学 | Broadband radio frequency receiver of high-performance LTE channel simulator |
| CN105372618A (en) * | 2015-12-15 | 2016-03-02 | 国家电网公司 | 500kV voltage transformer check power source multi-stage reactive power compensation system |
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