WO2015003296A1 - 射频拉远单元和相关设备 - Google Patents
射频拉远单元和相关设备 Download PDFInfo
- Publication number
- WO2015003296A1 WO2015003296A1 PCT/CN2013/078988 CN2013078988W WO2015003296A1 WO 2015003296 A1 WO2015003296 A1 WO 2015003296A1 CN 2013078988 W CN2013078988 W CN 2013078988W WO 2015003296 A1 WO2015003296 A1 WO 2015003296A1
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- WO
- WIPO (PCT)
- Prior art keywords
- amplifier
- conversion circuit
- input terminal
- voltage
- remote unit
- Prior art date
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 118
- 238000002955 isolation Methods 0.000 claims abstract description 40
- 238000004146 energy storage Methods 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims description 28
- 239000000463 material Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000009499 grossing Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a radio remote unit and related equipment. Background technique
- the power supply load current may exhibit a similar square wave with a frequency of several hundred hertz or more. Current waveform.
- the square wave negative carrier shape of these hundreds of Hertz or higher frequencies is fully present at the power input port of the device, which is represented by a square wave current. Since the impedance of the remote power line connected to the device input port is large, a square wave voltage of the corresponding frequency is reflected at the input port of the module.
- the internal power supply voltage of the RRU (Remote Radio Unit) has a certain input range, generally 36 to 60V.
- the RRU cannot work normally, so in the actual installation process, as long as the power output is After the voltage drops through the cable, the voltage to the RRU port is not less than 36V.
- the voltage drop of the cable is directly proportional to the current and cable impedance through the cable.
- the impedance of the cable is directly related to the diameter and length of the cable. Under normal conditions, the longer the length, the thinner the wire diameter. , the impedance is greater.
- the embodiments of the present invention provide a radio remote unit and related equipment, in order to reduce the material selection cost of the remote power line of the RRU and the limitation of the distance of the power line.
- a first aspect of the present invention provides a radio remote unit, which may include:
- a power conversion circuit configured to boost a voltage input by a power supply of the radio remote unit and output the voltage
- the isolation conversion circuit is configured to perform initial and secondary safety on a voltage output by the power conversion circuit Output to the power amplifier tube after isolation;
- the energy storage circuit is connected in parallel with the isolation conversion circuit
- the low frequency control circuit connected to the power conversion circuit is configured to control a fluctuation amplitude of an input current of the power conversion circuit to a predetermined range.
- the power conversion circuit includes: a diode, a first inductor, and a switch tube;
- the anode of the diode is connected to the positive input end of the radio frequency remote unit through the first inductor, and the anode of the diode is also connected to the drain of the switch tube, and the source of the switch tube is The negative input end of the radio remote unit is connected, and the gate of the switch is connected to the output end of the low frequency control circuit.
- the energy storage circuit includes a capacitor, wherein the capacitor is connected to a cathode of the diode and a source of the switch tube Between the poles.
- the low frequency control circuit includes: a second inductor, a first amplifier, a second amplifier, a first comparator, and a multiplier;
- the second inductor is configured to induce a current from a negative output end of the power supply of the radio remote unit, wherein two ends of the second inductor are respectively connected to two input ends of the first amplifier.
- An output of the first amplifier is coupled to a first inverting input of the first comparator; a positive input of the second amplifier is coupled to a first reference voltage output, and a negative of the second amplifier
- An input is coupled to a cathode of the diode; an output of the second amplifier is coupled to a first input of the multiplier, and a second input of the multiplier is coupled to a constant DC voltage output, the multiplying
- the output of the first comparator is coupled to the second inverting input of the first comparator, and the non-inverting input of the first comparator is coupled to the second reference voltage output.
- the low frequency control circuit includes: a third resistor, a first amplifier, a second amplifier, and a first comparison And multipliers;
- the negative input end of the radio remote unit is connected to the source of the switch tube through the third resistor, and the two ends of the third resistor are respectively connected to the two input ends of the first amplifier.
- An output of the first amplifier is coupled to a first inverting input of the first comparator; a positive input of the second amplifier is coupled to a first reference voltage output, and a negative of the second amplifier
- An input is coupled to a cathode of the diode; an output of the second amplifier is coupled to a first input of the multiplier, and a second input of the multiplier is coupled to a constant DC voltage output, the multiplying
- the output of the first comparator is coupled to the second inverting input of the first comparator, and the non-inverting input of the first comparator is coupled to the second reference voltage output.
- the low frequency control circuit further includes a voltage dividing circuit, where A negative input terminal of the second amplifier is coupled to the cathode of the diode through the voltage dividing circuit.
- the voltage dividing circuit includes a fourth resistor and a fifth resistor, wherein a negative input terminal of the second amplifier is connected to a cathode of the diode through the fourth resistor, and a negative input terminal of the second amplifier is further passed The fifth resistor is grounded.
- a second aspect of the present invention provides a base station, which may include:
- Baseband unit and radio remote unit are Baseband unit and radio remote unit
- the radio remote unit may include:
- a power conversion circuit configured to boost a voltage input by a power supply of the radio remote unit and output the voltage
- the isolation conversion circuit is configured to output the voltage outputted by the power conversion circuit to the power amplifier tube after being subjected to primary and secondary safety isolation;
- the energy storage circuit is connected in parallel with the isolation conversion circuit
- the low frequency control circuit connected to the power conversion circuit is configured to control a fluctuation amplitude of an input current of the power conversion circuit to a predetermined range.
- the power conversion circuit includes: a diode, a first inductor, and a switch tube;
- the anode of the diode is connected to the positive input end of the radio frequency remote unit through the first inductor, and the anode of the diode is also connected to the drain of the switch tube, and the source of the switch tube is The negative input end of the radio remote unit is connected, and the gate of the switch is connected to the output end of the low frequency control circuit.
- the energy storage circuit includes a capacitor, wherein the capacitor is connected to a cathode of the diode and a source of the switch tube Between the poles.
- the low frequency control circuit includes: a second inductor, a first amplifier, a second amplifier, a first comparator, and a multiplier;
- the second inductor is configured to induce a current from a negative output end of the power supply of the radio remote unit, wherein two ends of the second inductor are respectively connected to two input ends of the first amplifier.
- An output of the first amplifier is coupled to a first inverting input of the first comparator; a positive input of the second amplifier is coupled to a first reference voltage output, and a negative of the second amplifier
- An input is coupled to a cathode of the diode; an output of the second amplifier is coupled to a first input of the multiplier, and a second input of the multiplier is coupled to a constant DC voltage output, the multiplying
- the output of the first comparator is coupled to the second inverting input of the first comparator, and the non-inverting input of the first comparator is coupled to the second reference voltage output.
- the low frequency control circuit includes: a third resistor, a first amplifier, a second amplifier, a first comparator, and a multiplier;
- the negative input end of the radio remote unit is connected to the source of the switch tube through the third resistor, and the two ends of the third resistor are respectively connected to the two input ends of the first amplifier.
- the output of the first amplifier is connected to the first inverting input of the first comparator; the second a positive input terminal of the amplifier is coupled to the first reference voltage output terminal, a negative input terminal of the second amplifier is coupled to a cathode of the diode; an output of the second amplifier and a first input terminal of the multiplier Connected, a second input of the multiplier is coupled to a constant DC voltage output, an output of the multiplier is coupled to a second inverting input of the first comparator, the same input of the first comparator The terminal is connected to the second reference voltage output terminal.
- the low frequency control circuit further includes a voltage dividing circuit, where A negative input terminal of the second amplifier is coupled to the cathode of the diode through the voltage dividing circuit.
- the voltage dividing circuit includes a fourth resistor and a fifth resistor, wherein a negative input terminal of the second amplifier is connected to a cathode of the diode through the fourth resistor, and a negative input terminal of the second amplifier is further passed The fifth resistor is grounded.
- a third aspect of the present invention provides a radio transceiver device, which may include: a radio remote unit and a power supply for supplying power to the radio remote unit, where the radio remote unit may include:
- a power conversion circuit configured to boost a voltage input by a power supply of the radio remote unit and output the voltage
- the isolation conversion circuit is configured to output the voltage outputted by the power conversion circuit to the power amplifier tube after being subjected to primary and secondary safety isolation;
- An output end of the energy storage circuit is connected in parallel with an input end of the isolation conversion circuit
- the low frequency control circuit connected to the power conversion circuit is configured to control a fluctuation amplitude of an input current of the power conversion circuit to a predetermined range.
- the power conversion circuit includes: a diode, a first inductor, and a switch tube;
- the anode of the diode is connected to the positive input end of the radio frequency remote unit through the first inductor, and the anode of the diode is also connected to the drain of the switch tube, and the source of the switch tube is a negative input end of the radio remote unit is connected, a gate of the switch tube and the low frequency control circuit The output is connected.
- the energy storage circuit includes a capacitor, wherein the capacitor is connected to a cathode of the diode and a source of the switch tube Between the poles.
- the low frequency control circuit includes: a second inductor, a first amplifier, a second amplifier, a first comparator, and a multiplier;
- the second inductor is configured to induce a current from a negative output end of the power supply of the radio remote unit, wherein two ends of the second inductor are respectively connected to two input ends of the first amplifier.
- An output of the first amplifier is coupled to a first inverting input of the first comparator; a positive input of the second amplifier is coupled to a first reference voltage output, and a negative of the second amplifier
- An input is coupled to a cathode of the diode; an output of the second amplifier is coupled to a first input of the multiplier, and a second input of the multiplier is coupled to a constant DC voltage output, the multiplying
- the output of the first comparator is coupled to the second inverting input of the first comparator, and the non-inverting input of the first comparator is coupled to the second reference voltage output.
- the low frequency control circuit includes: a third resistor, a first amplifier, a second amplifier, a first comparator, and a multiplier;
- the negative input end of the radio remote unit is connected to the source of the switch tube through the third resistor, and the two ends of the third resistor are respectively connected to the two input ends of the first amplifier.
- An output of the first amplifier is coupled to a first inverting input of the first comparator; a positive input of the second amplifier is coupled to a first reference voltage output, and a negative of the second amplifier
- An input is coupled to a cathode of the diode; an output of the second amplifier is coupled to a first input of the multiplier, and a second input of the multiplier is coupled to a constant DC voltage output, the multiplying
- the output of the first comparator is coupled to the second inverting input of the first comparator, and the non-inverting input of the first comparator is coupled to the second reference voltage output.
- the low frequency control circuit further includes a voltage dividing circuit, where A negative input terminal of the second amplifier is coupled to the cathode of the diode through the voltage dividing circuit.
- the voltage dividing circuit includes a fourth resistor and a fifth resistor, wherein a negative input terminal of the second amplifier is connected to a cathode of the diode through the fourth resistor, and a negative input terminal of the second amplifier is further passed The fifth resistor is grounded.
- the RRU of the embodiment of the present invention includes a power conversion circuit, a low frequency control circuit, an isolation conversion circuit, a storage circuit, and a power amplifier tube.
- the power conversion circuit is configured to boost the voltage input from the power supply of the RRU and output the voltage.
- the isolation conversion circuit is configured to output the voltage outputted by the power conversion circuit to the power amplifier tube after the primary and secondary safety isolation; the energy storage circuit is connected in parallel with the input end of the isolation conversion circuit; and the low frequency control circuit is used to input the input current of the power conversion circuit The fluctuation amplitude is controlled within a predetermined range.
- the RRU By introducing the above-mentioned low frequency control circuit and the energy storage circuit in the RRU, it is advantageous to smooth the input current of the RRU, and the two power supply lines connecting the RRU and the power supply are long enough, that is, the power supply provides remote power supply to the RRU, and Smoothing the input current of the RRU (ie, the fluctuation of the input current of the RRU is small) is beneficial to realize that the RRU provides a remote power supply with a relatively small diameter, a long distance, and a relatively long distance.
- the long distance can be basically independent of the RRU input voltage and load (ie power tube) power variation; and, in the scenario where the RRU load current or power has large fluctuations, smoothing the input current of the RRU is also beneficial to reduce the equipment between The mutual influence.
- FIG. 1 is a schematic diagram of a radio remote unit provided by an embodiment of the present invention.
- FIG. 2 is a schematic diagram of another remote radio unit provided by an embodiment of the present invention.
- FIG. 3 is a schematic diagram of another apparatus for providing a radio remote unit according to an embodiment of the present invention
- FIG. 4 is a schematic diagram of another remote radio unit provided by an embodiment of the present invention
- FIG. 5 is a schematic diagram of another radio remote unit provided by an embodiment of the present invention
- FIG. 6 is a schematic diagram of a relationship between an input current and an input voltage for providing a remote radio unit according to an embodiment of the present invention
- FIG. 7 is a schematic diagram of an input current waveform of a power amplifier tube in a radio remote unit according to an embodiment of the present invention.
- FIG. 8 is a schematic diagram of a base station according to an embodiment of the present disclosure.
- FIG. 9 is a schematic diagram of another base station according to an embodiment of the present disclosure.
- FIG. 10 is a schematic diagram of a wireless transceiver device according to an embodiment of the present invention. detailed description
- the embodiments of the present invention provide a radio remote unit and related equipment, in order to reduce the material selection cost of the remote power line of the RRU and the limitation of the distance of the power line.
- an embodiment of the present invention provides a radio remote unit 100, wherein a radio remote unit
- the RF remote unit 100 can include: a power conversion circuit 110, a low frequency control circuit 130, a storage circuit 120, an isolation conversion circuit 140, and a power amplifier tube 150.
- the power conversion circuit 110 is configured to boost the voltage input from the power supply 200 of the remote radio unit 100 to the power conversion circuit 110, and then output the voltage. If the power supply 200 is placed at the remote end relative to the radio remote unit 100, the power supply 200 may also be referred to as a power supply.
- the first resistor R1 and the second resistor R2 in FIG. 1 are equivalent impedances of two power supply lines connecting the remote radio unit 100 and the power supply 200. It can be understood that when the two power supply lines connecting the remote radio unit 100 and the power supply 200 are sufficiently long, the equivalent impedance is also large enough, and the equivalent impedance is usually not ignored.
- the isolation conversion circuit 140 is configured to output the voltage output from the power conversion circuit 110 to the power amplifier tube 150 after being subjected to primary and secondary safety isolation.
- the tank circuit 120 is connected in parallel with the isolation converter circuit 140.
- the low frequency control circuit 130 connected to the power conversion circuit 110 is configured to control the fluctuation amplitude of the input current of the power conversion circuit 110 to a predetermined range.
- the power conversion circuit 110 may include: a diode D1, a first inductor L1, and a switch transistor Q1.
- the anode of the diode D1 is connected to the positive input terminal of the remote radio unit 100 through the first inductor L1 (since the positive input terminal of the radio remote unit 100 is connected to the positive output terminal of the power supply 200, it is equivalent to the anode of the diode D1.
- the first inductor L1 is connected to the positive output terminal of the power supply 200
- the anode of the diode D1 is also connected to the drain D of the switch Q1
- the source S of the switch Q1 is connected to the negative input terminal of the remote unit 100
- the negative input terminal of the radio remote unit 100 and the gate G of the negative transfer transistor Q1 of the power supply 200 are connected to the output terminal of the low frequency control circuit.
- the tank circuit 120 includes a capacitor C1, wherein the capacitor C1 is connected between the cathode of the diode D1 and the source S of the switch Q1.
- the low frequency control circuit 130 may include:
- a second inductor L2 a first amplifier 134, a second amplifier 132, a first comparator 133, and a multiplier
- the second inductor L2 is used to induce a current from the negative output end of the power supply 200 of the remote radio unit 100.
- the two ends of the second inductor L2 are respectively connected to the two input ends of the first amplifier 134.
- the first amplifier 134 The output terminal is connected to the first inverting input terminal of the first comparator 133; the positive input terminal of the second amplifier 132 and the first reference voltage output terminal Vref (wherein the first reference voltage output terminal outputs the first reference voltage) Connected, the negative input of the second amplifier 132 is coupled to the cathode of the diode D1 in the power conversion circuit 110; wherein the output of the second amplifier 132 is coupled to the first input of the multiplier 131, and the second input of the multiplier 131
- the terminal is connected to a constant DC voltage output terminal 135 (where the constant DC voltage output terminal 135 outputs a constant DC voltage), and the output of the multiplier 131 is connected to the second inverting input terminal of the first comparator 133, the first
- the low frequency control circuit 130 may include:
- the negative input end of the radio remote unit 100 is connected to the source S of the switch Q1 through the third resistor R3, and the two ends of the third resistor R3 are respectively connected to the two input ends of the first amplifier 133, the first amplifier
- the output of the 134 is connected to the first inverting input of the first comparator 133; the positive input of the second amplifier 132 and the first reference voltage output Vref (wherein the voltage output by the first reference voltage output Vref is the first a reference voltage, the first reference voltage may be a constant voltage, the first reference voltage is used for comparison with the negative input terminal of the second amplifier 132, and the negative input terminal of the second amplifier 132 is connected to the cathode of the diode D1;
- the output of the second amplifier 132 is connected to the first input of the multiplier 131, and the second input of the multiplier 131 is connected to the constant DC voltage output 135 (the constant DC voltage output 135 outputs a constant DC voltage), and the multiplier 131
- the output terminal is connected to
- the second reference voltage may be a constant voltage, and the second reference voltage is used for the voltage of the first inverting input terminal of the first comparator 133 and Two reverse inputs are compared).
- the low frequency control circuit 130 may further include: a voltage dividing circuit 137, wherein the negative input terminal of the second amplifier 132 passes through the voltage dividing circuit 137 and the second The cathode of the pole tube D1 is connected.
- the voltage dividing circuit voltage dividing circuit 137 is introduced to avoid the problem that the output voltage V 0 of the power converting circuit 110 is too high, which may affect the safety of the circuit.
- the voltage dividing circuit 137 shown in FIG. 4 may specifically include:
- FIG. 4 and FIG. 5 are illustrated by the structure of the low frequency control circuit 130 shown in FIG. 3. Some embodiments of the present invention may also be shown in FIG.
- the voltage dividing circuit 137 is added to the structure of the low frequency control circuit 130, and the connection manner thereof is similar, and details are not described herein again.
- switch tube Q1 shown in FIG. 2 to FIG. 5 can also be replaced with a transistor similar in function, and the ports of the replaced transistor are connected to other devices in a similar manner to the switch tube Q1. It will not be detailed here.
- Vs is the output voltage of the RRU's power supply (Vs is constant)
- Vin is the input voltage of the RRU
- lin is the input current of the RRU.
- Vin Vs - lin ( ⁇ 1+R2).
- the energy storage circuit 150 and the low frequency control circuit 130 are introduced into the RRU to control the fluctuation amplitude of the input current to a predetermined range, and strive to control the input current to follow a constant voltage to maintain a stable and constant state.
- the circuit shown in FIG. 1 to FIG. 5 can specifically solve the problem that the power supply line of the RRU is powered by the TRD system; and the power line diameter of the remote power supply for the RRU can be selected. Smaller, longer distances can also be relatively longer, and the wire diameter and distance can be substantially independent of RRU input voltage and load (ie, power tube) power variations. In the scenario where the load current or power of the RRU has large fluctuations, by smoothing the input current of the RRU (such as the output current of the power conversion circuit 110), it is advantageous to reduce the mutual influence between the devices.
- FIG. 2 to FIG. 5 exemplify several circuit structures that are low in cost, stable in performance, safe in operation, and are advantageous for better implementation and promotion of RRU products.
- the low frequency control circuit 130 detects the input current Iin of the power conversion circuit 110.
- the low-frequency control circuit 130 shown in FIG. 3 to FIG. 5 detects the input current Iin of the power conversion circuit 110 by using the third resistor R3, and the current Iin flowing through the third resistor R3 is equal to the voltage across the third resistor R3 divided by the third resistor.
- the second inductor L2 in FIG. 2 can obtain a voltage proportional to the input current Iin of the power conversion circuit 110 by using the second inductor L2, wherein the second inductor L2 in FIG. 2 senses the input current of the power conversion circuit 110 in a mutual inductance manner. Iin, the second inductor L2 and the voltage V L2 across the power conversion circuit 110, the input current Iin is also proportional relationship.
- 1/H is the voltage division ratio of the voltage dividing circuit 137. If H is equal to 1, it means that the voltage dividing circuit 137 is not introduced (the scene in which the voltage dividing circuit 137 is not introduced may be as shown in FIG. 2 and FIG. 3)).
- the first comparator 133 Assuming that the output voltage of the first amplifier is B1, the output voltage of the multiplier 131 is B2, and when the voltage B1 is greater than the voltage B2, the first comparator 133 outputs a low level, at which time the switch Q1 is turned off, and the switch Q1 is turned off. The output current Io of the power conversion circuit 110 is reduced. When the voltage B1 is lower than the voltage B2, the first comparator 133 outputs a high level. At this time, the switching transistor Q1 is turned on, and the power conversion circuit 110 is turned off when the switching transistor Q1 is turned off. The output current Io becomes large, and finally the fluctuation amplitude of the input current Iin of the power conversion circuit 110 can be controlled within a predetermined range.
- the power supply current I_load of the power amplifier tube 150 in the RRU needs to be a square wave current (I-load can be, for example, a square wave current with a period of about 10 ms), which is determined by the TDD system, and the purpose of the solution of the embodiment of the present invention is One is to smooth the output current Io of the power conversion circuit 110, so that the input current Iin of the power conversion circuit 110 is a substantially smooth DC current Iin, so that the designed power supply line can be substantially smooth DC current. Iin designed the wire diameter of the power supply line in anticipation of lower product cost.
- the power amplifier tube 150 exhibits the characteristics of a dynamic load. When the I-load is in a large current period, the storage capacitor C1 and the power conversion circuit 110 jointly supply power to the power tube 150. During the time when the I-load is in the current, the power conversion circuit 110 is divided. The power tube 150 provides energy and also charges the storage capacitor C (at this time, the storage capacitor C1 functions as an energy storage device).
- the output current of the power conversion circuit 110 can be relatively smooth, thereby achieving a low-frequency smoothing filtering effect, and the low-frequency control circuit 130 controls the switching transistor Q1 to be turned on or off, which is advantageous for implementation.
- the input current Iin of the power conversion circuit 110 remains substantially constant during T1 and T2.
- the RRU provided in this embodiment includes a power conversion circuit, a low frequency control circuit, an isolation conversion circuit, a storage circuit, and a power amplifier tube.
- the power conversion circuit is configured to boost the voltage input from the power supply of the RRU and output the voltage.
- the isolation conversion circuit is configured to output the voltage outputted by the power conversion circuit to the power amplifier tube after initial and secondary safety isolation; the energy storage circuit is connected in parallel with the isolation conversion circuit; and the low frequency control circuit is used to increase the fluctuation amplitude of the input current of the power conversion circuit Control is in the predetermined range.
- an embodiment of the present invention provides a base station 800, including:
- Interconnected baseband unit 810 and radio remote unit 820 are Interconnected baseband unit 810 and radio remote unit 820.
- the radio remote unit 820 can be the radio remote unit 100 as described in the foregoing embodiment.
- the radio remote unit 100 wherein the radio remote unit 100 operates in the TDD mode, the radio remote unit 100 may include: a power conversion circuit 110, a low frequency control circuit 130, a storage circuit 120, and an isolation transform. Circuit 140 and power amplifier tube 150.
- the power conversion circuit 110 is configured to boost the voltage input from the power supply 200 of the remote radio unit 100 to the power conversion circuit 110, and then output the voltage. If the power supply 200 is placed at the remote end relative to the radio remote unit 100, the power supply 200 may also be referred to as a power supply.
- the first resistor R1 and the second resistor R2 in FIG. 1 are equivalent impedances of two power supply lines connecting the remote radio unit 100 and the power supply 200. It can be understood that when the two power supply lines connecting the remote radio unit 100 and the power supply 200 are sufficiently long, the equivalent impedance is also large enough, and the equivalent impedance is usually not ignored.
- the isolation conversion circuit 140 is configured to output the voltage output from the power conversion circuit 110 to the power amplifier tube 150 after being subjected to primary and secondary safety isolation.
- the output of the tank circuit 120 is coupled in parallel with the input of the isolation converter circuit 140.
- the low frequency control circuit 130 connected to the power conversion circuit 110 is configured to control the fluctuation amplitude of the input current of the power conversion circuit 110 to a predetermined range.
- the power conversion circuit 110 may include: a diode D1, a first inductor L1, and a switch transistor Q1.
- the anode of the diode D1 is connected to the positive input terminal of the remote radio unit 100 through the first inductor L1 (since the positive input terminal of the radio remote unit 100 is connected to the positive output terminal of the power supply 200, it is equivalent to the anode of the diode D1.
- the first inductor L1 is connected to the positive output terminal of the power supply 200
- the anode of the diode D1 is also connected to the drain D of the switch Q1
- the source S of the switch Q1 is connected to the negative input terminal of the remote unit 100
- the negative input terminal of the radio remote unit 100 and the gate G of the negative transfer transistor Q1 of the power supply 200 are connected to the output terminal of the low frequency control circuit.
- the tank circuit 120 includes a capacitor C1, wherein the capacitor C1 is connected between the cathode of the diode D1 and the source S of the switch Q1.
- the low frequency control circuit 130 may include:
- the second inductor L2 The second inductor L2, the first amplifier 134, the second amplifier 132, the first comparator 133, and the multiplier 131.
- the second inductor L2 is used to induce a current from the negative output end of the power supply 200 of the remote radio unit 100.
- the two ends of the second inductor L2 are respectively connected to the two input ends of the first amplifier 134.
- the first amplifier 134 The output terminal is connected to the first inverting input terminal of the first comparator 133; the positive input terminal of the second amplifier 132 and the first reference voltage output terminal Vref (wherein the first reference voltage output terminal outputs the first reference voltage) Connected, the negative input of the second amplifier 132 is coupled to the cathode of the diode D1 in the power conversion circuit 110; wherein the output of the second amplifier 132 is coupled to the first input of the multiplier 131, and the second input of the multiplier 131
- the terminal is connected to a constant DC voltage output terminal 135 (where the constant DC voltage output terminal 135 outputs a constant DC voltage), and the output of the multiplier 131 is connected to the second inverting input terminal of the first comparator 133, the first
- the low frequency control circuit 130 may include:
- the negative input end of the radio remote unit 100 is connected to the source S of the switch Q1 through the third resistor R3, and the two ends of the third resistor R3 are respectively connected to the two input ends of the first amplifier 133, the first amplifier
- the output of the 134 is connected to the first inverting input of the first comparator 133; the positive input of the second amplifier 132 and the first reference voltage output Vref (wherein the voltage output by the first reference voltage output Vref is the first Connected to a reference voltage, the negative input of the second amplifier 132 is coupled to the cathode of the diode D1; wherein the output of the second amplifier 132 is coupled to the first input of the multiplier 131, and the second input of the multiplier 131 is coupled
- the constant DC voltage output terminal 135 is connected, the output of the multiplier 131 is connected to the second inverting input terminal of the first comparator 133, and the non-inverting input terminal of the first comparator 133 is connected to the second reference voltage output terminal 136.
- the low frequency control circuit 130 shown in FIG. 3 can further Steps include:
- the voltage dividing circuit 137 wherein the negative input terminal of the second amplifier 132 is connected to the cathode of the diode D1 through the voltage dividing circuit 137.
- the voltage dividing circuit voltage dividing circuit 137 is introduced to avoid the problem that the output voltage V 0 of the power converting circuit 110 is too high, which may affect the safety of the circuit.
- the voltage dividing circuit 137 shown in FIG. 4 may specifically include: a fourth resistor R4 and a fifth resistor R5, wherein the negative input terminal of the second amplifier 132 passes through the fourth resistor.
- R4 is coupled to the cathode of diode D1
- the negative input of second amplifier 132 is also coupled to ground via a fifth resistor R5. It can be understood that the voltage dividing circuit of the structure shown in Fig. 5 has a simple structure, low cost, and a stable working state.
- switch tube Q1 shown in FIG. 2 to FIG. 5 can also be replaced with a transistor similar in function, and the ports of the replaced transistor are connected to other devices in a similar manner to the switch tube Q1. It will not be detailed here.
- Vs is the output voltage of the RRU's power supply (Vs is constant)
- Vin is the input voltage of the RRU
- lin is the input current of the RRU.
- Vin Vs _Iin x (M+R2.
- the energy storage circuit 150 and the low frequency control circuit 130 are introduced in the RRU to control the fluctuation amplitude of the input current to a predetermined range, and strive to control the input current to follow a constant voltage to maintain a stable and constant state.
- the circuit shown in FIG. 1 to FIG. 5 can specifically solve the problem that the power supply line of the RRU is powered by the TRD system; and the power supply line diameter of the remote power supply for the RRU can be selected.
- extended distances can also be relatively longer, and the wire diameter and the extended distance can be substantially unaffected by the RRU input voltage and load (ie, power tube) power variations.
- the load current or power of the RRU has large fluctuations, by smoothing the input current of the RRU (such as the output current of the power conversion circuit 110), it is advantageous to reduce the mutual influence between the devices.
- FIG. 2 to FIG. 5 exemplify several circuit structures that are low in cost, stable in performance, safe in operation, and are advantageous for better implementation and promotion of RRU products.
- the low frequency control circuit 130 detects the input current Iin of the power conversion circuit 110.
- the low-frequency control circuit 130 shown in FIG. 3 to FIG. 5 detects the input current Iin of the power conversion circuit 110 by using the third resistor R3, and the current Iin flowing through the third resistor R3 is equal to the voltage across the third resistor R3 divided by the third resistor.
- the second inductor L2 in FIG. 2 can obtain a voltage proportional to the input current Iin of the power conversion circuit 110 by using the second inductor L2, wherein the second inductor L2 in FIG. 2 senses the input current of the power conversion circuit 110 in a mutual inductance manner. Iin, the second inductor L2 and the voltage V L2 across the power conversion circuit 110, the input current Iin is also proportional relationship.
- 1/H is the voltage division ratio of the voltage dividing circuit 137. If H is equal to 1, it means that the voltage dividing circuit 137 is not introduced (the scene in which the voltage dividing circuit 137 is not introduced may be as shown in FIG. 2 and FIG. 3)).
- the first comparator 133 Assuming that the output voltage of the first amplifier is B1, the output voltage of the multiplier 131 is B2, and when the voltage B1 is greater than the voltage B2, the first comparator 133 outputs a low level, at which time the switch Q1 is turned off, and the switch Q1 is turned off. The output current Io of the power conversion circuit 110 is reduced. When the voltage B1 is lower than the voltage B2, the first comparator 133 outputs a high level. At this time, the switching transistor Q1 is turned on, and the power conversion circuit 110 is turned off when the switching transistor Q1 is turned off. The output current Io becomes large, and finally the fluctuation amplitude of the input current Iin of the power conversion circuit 110 can be controlled within a predetermined range.
- the power supply current I_load of the power amplifier tube 150 in the RRU needs to be a square wave current (I-load can be, for example, a square wave current with a period of about 10 ms), which is determined by the TDD system, and the purpose of the solution of the embodiment of the present invention is One is to smooth the output current Io of the power conversion circuit 110, so that the input current Iin of the power conversion circuit 110 is a substantially smooth DC current Iin, so that the designed power supply line can be substantially smooth DC current. Iin designed the wire diameter of the power supply line in anticipation of lower product cost.
- the power amplifier tube 150 exhibits the characteristics of a dynamic load. When the I-load is in a large current period, the storage capacitor C1 and the power conversion circuit 110 jointly supply power to the power tube 150. During the time when the I-load is in the current, the power conversion circuit 110 is divided. The power tube 150 provides energy and also charges the storage capacitor C (at this time, the storage capacitor C1 functions as an energy storage device).
- the output current of the power conversion circuit 110 can be relatively smooth, thereby achieving a low-frequency smoothing filtering effect, and the low-frequency control circuit 130 controls the switching transistor Q1 to be turned on or off, which is advantageous for implementation.
- the input current Iin of the power conversion circuit 110 remains substantially constant during T1 and T2.
- the base station 800 can further include: a power supply 830 for providing remote power to the remote unit 820.
- the base station 800 mainly includes: an interworking baseband unit 810 and a radio remote unit 820, wherein the radio remote unit 820 includes: a power conversion circuit, a low frequency control circuit, an isolation conversion circuit, and energy storage. a circuit and a power amplifier tube; wherein, the power conversion circuit is configured to boost the voltage input from the power supply of the RRU and output; the isolation conversion circuit is configured to output the voltage outputted by the power conversion circuit to the power amplifier tube after being subjected to primary and secondary safety isolation
- the energy storage circuit is connected in parallel with the input end of the isolation conversion circuit; the low frequency control circuit is used to control the fluctuation amplitude of the input current of the power conversion circuit to a predetermined range.
- the RRU By introducing a low-frequency control circuit and a storage circuit in the RRU, it is advantageous to smooth the input current of the RRU, and smoothing the input current of the RRU is advantageous for the RRU to provide a remote power supply with a relatively small distance and a long distance. Can also be relatively long, the wire diameter and the distance can be basically not The effect of RRU input voltage and load (ie power tube) power variation; and, in the scenario where the load current or power of the RRU fluctuates greatly, smoothing the input current of the RRU is also beneficial to reduce the interaction between the devices.
- an embodiment of the present invention provides a wireless transceiver device 1000, which may include: a radio remote unit 1010 and a power supply 1020 for supplying power to the radio remote unit 1010, where the radio remote unit 1010 may be The radio remote unit 100 as described in the above embodiment.
- the radio remote unit provided by the embodiment of the present invention is described in detail.
- the principles and embodiments of the present invention are described in the following. The description of the above embodiment is only used to help understand the method and the method of the present invention.
- the present invention is not limited to the scope of the present invention.
- the details of the present invention are not limited by the scope of the present invention.
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- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Amplifiers (AREA)
Abstract
Description
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PCT/CN2013/078988 WO2015003296A1 (zh) | 2013-07-08 | 2013-07-08 | 射频拉远单元和相关设备 |
EP13889255.9A EP3021638B1 (en) | 2013-07-08 | 2013-07-08 | Remote radio unit and associated device |
JP2016524645A JP6291045B2 (ja) | 2013-07-08 | 2013-07-08 | リモート無線ユニットおよび関連デバイス |
CN201380001040.1A CN103650600B (zh) | 2013-07-08 | 2013-07-08 | 射频拉远单元和相关设备 |
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JP2017143633A (ja) * | 2016-02-09 | 2017-08-17 | 住友電気工業株式会社 | 電力変換装置、パワーコンディショナ、パワーコンディショナシステム、および電源システム |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105472786B (zh) | 2014-09-04 | 2019-06-21 | 华为技术有限公司 | 一种分布式基站和通信*** |
WO2018018466A1 (zh) * | 2016-07-27 | 2018-02-01 | 华为技术有限公司 | 一种有源天线***、基站及通信*** |
CN108344899B (zh) * | 2017-01-24 | 2020-09-08 | 华为机器有限公司 | 一种分布式基站及电缆阻抗测量方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101841935A (zh) * | 2010-05-12 | 2010-09-22 | 新邮通信设备有限公司 | 一种单天线射频拉远单元 |
CN102064880A (zh) * | 2009-11-13 | 2011-05-18 | 中兴通讯股份有限公司 | 一种射频拉远模块及其功放保护方法 |
CN102064770A (zh) * | 2010-10-28 | 2011-05-18 | 新邮通信设备有限公司 | 射频拉远单元及对射频拉远单元漏极电压进行调整的方法 |
CN102439835A (zh) * | 2011-10-09 | 2012-05-02 | 华为技术有限公司 | 一种无线分布式基站供电*** |
US20120208584A1 (en) * | 2009-10-29 | 2012-08-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and Arrangement in a Communication System |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1028390A (ja) * | 1996-07-08 | 1998-01-27 | Mikasa Sangyo Kk | 機器の駆動装置 |
JP2005086843A (ja) * | 2003-09-04 | 2005-03-31 | Taiyo Yuden Co Ltd | 電力供給源の出力制御装置 |
US7019503B1 (en) * | 2005-02-07 | 2006-03-28 | Raytheon Company | Active power filter with input voltage feedforward, output load feedforward, and output voltage feedforward |
JP4899547B2 (ja) * | 2005-10-21 | 2012-03-21 | 富士電機株式会社 | スイッチング電源 |
JP2010118918A (ja) * | 2008-11-13 | 2010-05-27 | Nec Corp | 無線通信装置、電力増幅器の電源電圧制御方法 |
JP2010178479A (ja) * | 2009-01-28 | 2010-08-12 | Kyocera Corp | 基地局装置 |
CN101877917B (zh) * | 2009-04-28 | 2012-09-05 | 电信科学技术研究院 | 射频拉远单元 |
EP2449663B1 (en) * | 2009-07-01 | 2013-08-28 | Telefonaktiebolaget LM Ericsson (publ) | Power supply with dynamic input current suppression |
CN101656437B (zh) * | 2009-09-16 | 2012-01-04 | 京信通信***(中国)有限公司 | 一种远程馈电装置 |
JP2011188625A (ja) * | 2010-03-09 | 2011-09-22 | Konica Minolta Business Technologies Inc | 電源装置、それを用いた画像形成装置、電源装置の制御方法、及び電源装置の制御プログラム |
CN102523618A (zh) * | 2011-12-26 | 2012-06-27 | 华为技术有限公司 | 远端射频单元及其功耗限制方法、以及基站控制器 |
-
2013
- 2013-07-08 JP JP2016524645A patent/JP6291045B2/ja active Active
- 2013-07-08 WO PCT/CN2013/078988 patent/WO2015003296A1/zh active Application Filing
- 2013-07-08 EP EP13889255.9A patent/EP3021638B1/en active Active
- 2013-07-08 CN CN201380001040.1A patent/CN103650600B/zh active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120208584A1 (en) * | 2009-10-29 | 2012-08-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and Arrangement in a Communication System |
CN102064880A (zh) * | 2009-11-13 | 2011-05-18 | 中兴通讯股份有限公司 | 一种射频拉远模块及其功放保护方法 |
CN101841935A (zh) * | 2010-05-12 | 2010-09-22 | 新邮通信设备有限公司 | 一种单天线射频拉远单元 |
CN102064770A (zh) * | 2010-10-28 | 2011-05-18 | 新邮通信设备有限公司 | 射频拉远单元及对射频拉远单元漏极电压进行调整的方法 |
CN102439835A (zh) * | 2011-10-09 | 2012-05-02 | 华为技术有限公司 | 一种无线分布式基站供电*** |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017143633A (ja) * | 2016-02-09 | 2017-08-17 | 住友電気工業株式会社 | 電力変換装置、パワーコンディショナ、パワーコンディショナシステム、および電源システム |
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EP3021638B1 (en) | 2017-08-30 |
JP2016524453A (ja) | 2016-08-12 |
EP3021638A4 (en) | 2016-08-10 |
CN103650600B (zh) | 2018-06-05 |
JP6291045B2 (ja) | 2018-03-14 |
CN103650600A (zh) | 2014-03-19 |
EP3021638A1 (en) | 2016-05-18 |
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