CN219611789U - Relay amplifier for use in a time division multiplexed mobile network - Google Patents
Relay amplifier for use in a time division multiplexed mobile network Download PDFInfo
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- CN219611789U CN219611789U CN202320335235.0U CN202320335235U CN219611789U CN 219611789 U CN219611789 U CN 219611789U CN 202320335235 U CN202320335235 U CN 202320335235U CN 219611789 U CN219611789 U CN 219611789U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model relates to a relay amplifier for a time division multiplexing mobile network, which comprises a first radio frequency switch, a second radio frequency switch, a control signal generating unit and a power amplifying unit; the control signal generating unit generates control signals and transmits the control signals to the first radio frequency switch and the second radio frequency switch to control the first radio frequency switch and the second radio frequency switch; under the action of a control signal, the first radio frequency switch and the second radio frequency switch respectively enable different input ends or output ends of the power amplification unit to be connected to the donor antenna or the retransmission antenna through the same switching action; the power amplifying unit is provided with two input ends and two output ends, one input end and one output end are connected to the two switch ends of the first radio frequency switch, and the other input end and the other output end are connected to the two switch ends of the second radio frequency switch. The relay amplifier for the time division multiplexing mobile network has the following beneficial effects: the components are fewer, and the cost is lower.
Description
Technical Field
The present utility model relates to the field of signal transmission in mobile networks, and more particularly to a repeater amplifier for use in a time division multiplexed mobile network.
Background
The time division multiplexing mobile network refers to that when a base station and a terminal in the mobile network communicate, the uplink and downlink signals of the mobile network adopt the same frequency resource and different time slots are used for distinguishing the uplink and downlink signals. Namely, the network characteristic of the time division multiplexing mobile network is that the uplink and the downlink are in the same frequency band, and different time slots are adopted in the time domain to distinguish the uplink and the downlink from different users, which is also commonly called as a TDD communication technology. The relay amplifier receives the weak downlink time slot signal of the base station, amplifies the signal and transfers the amplified signal to the mobile terminal for use. Or conversely, the uplink weak signal of the mobile terminal is amplified and forwarded to the base station. In theory, the uplink and downlink gains of the relay amplifying device are relatively close, so that the same uplink and downlink coverage of the communication system can be maintained. In the prior art, between a base station and a terminal of a time division multiplexing mobile network, two sets of independent uplink and downlink amplifying units are adopted to amplify base station signals and terminal signals respectively. Such an amplification type component is more, difficult to layout, and costly.
Disclosure of Invention
The utility model aims to solve the technical problems that the prior art has more components, is difficult to layout and has higher cost, and provides a relay amplifier which has fewer components, is easy to layout and has lower cost and is used in a time division multiplexing mobile network.
The technical scheme adopted for solving the technical problems is as follows: a relay amplifier for a time division multiplexing mobile network is constructed, and is used for realizing amplification transmission of uplink and downlink signals between a donor antenna and a retransmission antenna, and the relay amplifier comprises a first radio frequency switch, a second radio frequency switch, a control signal generating unit and a power amplifying unit;
the control signal generating unit obtains signals from the donor antenna, processes the obtained signals and generates control signals, and the control signals are respectively transmitted to the first radio frequency switch and the second radio frequency switch;
under the action of the control signals, the first radio frequency switch and the second radio frequency switch respectively enable different input ends or output ends of the power amplification unit to be connected to the donor antenna or the retransmission antenna through the same switching action so as to realize the amplification transmission of the uplink signals or the amplification transmission of the downlink signals;
the power amplifying unit is provided with two input ends and two output ends, and signals input by the two input ends are amplified by the power amplifier and output by the two output ends; one input end and one output end are connected to the two switch ends of the first radio frequency switch, and the other input end and the other output end are connected to the two switch ends of the second radio frequency switch.
Further, the first radio frequency switch and the second radio frequency switch have the same structure and comprise a signal end, a first switch end and a second switch end, and the signal ends of the first radio frequency switch and the second radio frequency switch are respectively connected with the first switch end or the second switch end under the action of a control signal; the signal end of the first radio frequency switch is connected with the donor antenna, and the signal end of the second radio frequency switch is connected with the retransmission antenna.
Further, a first switch end of the first radio frequency switch is connected with one input end of the power amplifying unit, and a second switch end of the first radio frequency switch is connected with one output end of the power amplifying unit; the first switch end of the second radio frequency switch is connected with the other output end of the power amplifying unit; and a second switch end of the second radio frequency switch is connected with the other input end of the power amplifying unit.
Further, the power amplifying unit comprises an input power distributor, an amplifying module and an output power distributor; the input power divider comprises two signal input ends and a signal output end, and the two signal input ends of the input power divider are respectively input ends of the power amplifying unit; the output end of the input power distributor is connected with the input end of the amplifying module; the output power distributor comprises a signal input end and two signal output ends, wherein the signal input end of the output power distributor is connected with the output end of the amplifying module, and the two output ends of the output power distributor are respectively and electrically connected with the two output ends of the power amplifying unit.
Still further, the power amplifying unit further includes two adjustable attenuators, which are respectively connected in series between the output end of the output power divider and the output end of the power amplifying unit.
Further, the amplifying module comprises a low noise amplifier and a power amplifier which are connected in series.
Still further, the control signal generating unit includes a power detecting module; the power detection module outputs different level signals as control signals according to the frame format of the current wireless network by receiving the downlink signal power on the donor antenna and according to the existence of the downlink signal power, wherein the different levels of the control signals represent the current uplink time slot or the downlink time slot.
Further, when the power detection module detects the downlink power, the power detection module outputs a control signal representing that the downlink power is currently in a downlink time slot, detects the duration of the current downlink power, judges the position of the current downlink time slot in a data frame of the current wireless network, and determines the duration of an adjacent uplink time slot according to the structure of the data frame, so that the duration of the control signal representing that the uplink time slot is present after the downlink power disappears is obtained.
Further, the duration of the uplink time slot needs to be subtracted from the detection time for detecting the downlink power, and the detection time is a constant.
Further, when there is another downlink time slot in the data frame, the power detection module converts the control signal into a level representing a downlink time slot and maintains a set time after maintaining a control signal level representing an uplink time slot for a set time according to a frame structure of the data frame.
The relay amplifier for the time division multiplexing mobile network has the following beneficial effects: the control signal generating unit can decode or detect power according to a downlink signal on the donor antenna, and can generate a corresponding control signal according to the current uplink or downlink time slot state, wherein the control signal has a set level, and when the signal acts on the first radio frequency switch and the second radio frequency switch, the first radio frequency switch and the second radio frequency switch make the same action; the power amplifying unit is provided with two input ends and two output ends, and the connection relation between the input ends and the output ends and the switch ends of the first radio frequency switch and the second radio frequency switch is added, so that the power amplifying unit can amplify signals in uplink time slots or downlink time slots, namely, one control signal is used, and the structure of the power amplifying unit and the connection relation between the power amplifying unit and the random radio frequency switch and the second radio frequency switch are added, so that the function of amplifying uplink and downlink signals of the single-channel power amplifying unit is simultaneously met. Therefore, the device has fewer components, is easy to layout and has lower cost.
Drawings
Fig. 1 is a schematic diagram of a repeater amplifier in an embodiment of the present utility model for use in a time division multiplexed mobile network;
fig. 2 is a schematic diagram of the structure of the power amplifying unit in the embodiment;
fig. 3 is a schematic diagram of time slot allocation of a data frame of a wireless network in the embodiment.
Detailed Description
Embodiments of the present utility model will be further described with reference to the accompanying drawings.
As shown in fig. 1, in an embodiment of a repeater amplifier for a time division multiplexing mobile network according to the present utility model, the repeater amplifier is used for implementing amplified transmission of uplink and downlink signals between a donor antenna and a retransmission antenna, and includes a first radio frequency switch, a second radio frequency switch, a control signal generating unit, and a power amplifying unit; the control signal generation unit obtains signals from the donor antenna through a coupler, processes the obtained signals and generates control signals, and the obtained control signals are respectively transmitted to the first radio frequency switch and the second radio frequency switch and are used for controlling the positions or the switching actions of the switch ends of the first radio frequency switch and the second radio frequency switch; under the action of the control signals, the first radio frequency switch and the second radio frequency switch respectively enable different input ends or output ends of the power amplification unit to be connected to the donor antenna or the retransmission antenna through the same switching action so as to realize the amplification transmission of the uplink signals or the amplification transmission of the downlink signals; the power amplifying unit is provided with two input ends and two output ends, and signals input by the two input ends are amplified by the power amplifier and output by the two output ends; one input end and one output end are connected to the two switch ends of the first radio frequency switch, and the other input end and the other output end are connected to the two switch ends of the second radio frequency switch.
Since the control signals applied to the first and second rf switches are identical, the first and second rf switches themselves are identical in structure, and thus the actions generated by the control signals on the first and second rf switches are identical. The signal terminals of one control signal or one control signal are connected with the switch terminals of the same number respectively, for example, when the control signal is high, the signal terminals of the two radio frequency switches are respectively connected with the switch terminal of the switch with the number 1, and when the control signal is low, the signal terminals of the two radio frequency switches are respectively connected with the switch terminal of the switch with the number 2.
That is, the first rf switch and the second rf switch have the same structure and each include a signal end, a first switch end and a second switch end, and the signal ends of the first rf switch and the second rf switch are respectively connected with the first switch end or the second switch end under the action of a control signal or a control signal level; the signal end of the first radio frequency switch is connected with the donor antenna, and the signal end of the second radio frequency switch is connected with the retransmission antenna. As shown in fig. 1, a first switch end of the first radio frequency switch is connected with one input end of the power amplifying unit, and a second switch end of the first radio frequency switch is connected with one output end of the power amplifying unit; the first switch end of the second radio frequency switch is connected with the other output end of the power amplifying unit; and a second switch end of the second radio frequency switch is connected with the other input end of the power amplifying unit.
The connection relation ensures that under the action of the same control signal, two radio frequency switches with the same structure are respectively connected with two input ends and two output ends of the power amplification unit, and under the condition that the amplification direction of the power amplification unit is not changed, signal amplification channels in different directions are respectively provided between the donor antenna and the retransmission antenna in a set time period through the set connection relation and the switching action of the two radio frequency switches.
As shown in fig. 2, in the present embodiment, the power amplifying unit includes an input power splitter, an amplifying module, and an output power splitter; the amplifying module comprises a low noise amplifier and a power amplifier which are connected in series; the input power divider comprises two signal input ends and one signal output end, wherein the two signal input ends of the input power divider are the input ends of the power amplifying unit respectively, namely the input end 1 and the input end 2 in fig. 2 are the input end 1 and the input end 2 of the power amplifying unit in fig. 1; the output end of the input power divider is connected with the input end of the amplifying module, specifically, the input end of the low noise amplifier in fig. 2, the output end of the low noise amplifier is connected with the input end of the power amplifier, and the output end of the power amplifier is connected with the signal input end of the output power divider; the output power distributor comprises a signal input end and two signal output ends, wherein the signal input end of the output power distributor is connected with the output end of the amplifying module (specifically, the output end of the power amplifier), and the two output ends of the output power distributor are respectively and electrically connected with the two output ends of the power amplifying unit. Likewise, the output terminals 1 and 2 in fig. 2 are the output terminals 1 and 2 of the power amplifying unit in fig. 1.
In some cases, it is desirable to adjust or control the signal strength appearing on the antenna to suit the needs of the environment in which it is located. For this purpose, the power amplifying unit in this embodiment may further include two adjustable attenuators, see VR1 and VR2 in fig. 2, which are respectively connected in series between two signal output terminals of the output power splitter and two output terminals (i.e., output terminal 1 and output terminal 2 in fig. 2) of the power amplifying unit.
As can be seen from fig. 1 and 2, when in the downlink timeslot, under the effect of the control signal, the signal end of the first radio frequency switch is connected with the first switch end, so that the signal is connected to the input end 1 of the power amplifying unit by the donor antenna, and sequentially passes through the input power divider, the low noise amplifier, the power amplifier and the output power divider, and appears at two output ends of the power amplifying unit, but at this time, since the signal end of the first radio frequency switch is not connected with the second switch end thereof, the output end 1 of the power amplifying unit is suspended, and the signal end of the second radio frequency switch is also connected with the first switch end thereof due to the effect of the control signal, so that the signal at the output end 2 of the power amplifying unit appears and is transmitted to the retransmission antenna through the first switch end and the signal end of the second radio frequency switch, thereby realizing the transmission of the downlink signal from the donor antenna to the retransmission antenna. When the data frame is in the uplink time slot, the signal ends of the first radio frequency switch and the second radio frequency switch are connected to the respective second switch ends under the action of the control signal (at this time, the control signal and the downlink time slot have different levels), so that the uplink signal appearing on the retransmission antenna enters the input end 2 of the power amplifying unit through the signal end and the second switch end of the second radio frequency switch, and the signal flow directions of the uplink signal and the downlink signal are the same in the power amplifying unit. The uplink signal is then also present at the output 1 and the output 2 of the power amplifying unit after amplification, and likewise, since the signal terminal of the second radio frequency switch is connected to the second switch terminal thereof, the output 2 of the power amplifying unit is suspended at this time, and the signal present at the output 1 of the power amplifying unit enters the donor antenna through the second switch terminal of the first radio frequency switch and the signal terminal of the first radio frequency switch, so that the amplified transmission of the signal of the uplink time slot from the retransmission antenna to the donor antenna is realized.
In this embodiment, the control signal generating unit may be a power detecting module, where the power detecting module receives a part of the downlink signal power on the donor antenna, and outputs different level signals as control signals according to the frame format of the current wireless network and according to the existence of the downlink signal power, where the different levels of the control signals represent that the current uplink time slot or the downlink time slot is located. When the power detection module detects downlink power, the power detection module outputs a control signal representing the current downlink time slot, detects the duration of the current downlink power, judges the position of the current downlink time slot in a data frame of the current wireless network, and determines the duration of an adjacent uplink time slot according to the structure of the data frame, so that the duration of the control signal representing the uplink time slot after the downlink power disappears is obtained. The duration of the uplink time slot needs to be subtracted from the detection time for detecting the downlink power, which is a constant.
And under the condition that another downlink time slot exists in the data frame, the power detection module converts the control signal into the level representing the downlink time slot and keeps the set time after keeping the control signal level representing the uplink time slot of the set time according to the frame structure of the data frame.
In summary, the power detection module uses a data frame as a period to determine the duration of the current time slot and the next uplink or downlink time slot, so as to obtain the control signal.
Fig. 3 shows the structure of a data frame in one case of the present embodiment, in which the positions and durations of uplink and downlink slots in one data frame are explicitly indicated. Taking fig. 3 as an example, a specific case of the power detection module generating the control signal is as follows:
fig. 3 shows a structure of a data frame in 5 GNRs of 3.5GHz for TDD, the frame period of the data frame being 5ms, and one frame including 10 slots, each slot being 0.5ms. In fig. 3, the time slot marked D is a downlink time slot, the time slot marked U is an uplink time slot, the time slot marked S is a special time slot for uplink and downlink switching, and adjustment of the number of uplink and downlink symbols, in which case the case of the special time slot S is shown at the top of fig. 3, divided into 14 symbols, the first 10 symbols are used for downlink data transmission, and the last two symbols are used for uplink data transmission. The power detection module firstly detects whether the power of the downlink signal exists, and after the power detection module detects the existence of the downlink signal, on one hand, the power detection module outputs the control signal level when the downlink time slot exists, and on the other hand, calculates the existence time of the downlink power; after the downlink power is finished, judging whether the existence time is equal to (3+5/7) x 0.5 milliseconds, if so, indicating that the positions of 3 continuous downlink time slots in one frame in fig. 3 are positioned when the detected downlink time slot, starting from the downlink power ending position, starting the downlink time slot for (2+5/7) x 0.5 milliseconds after delaying (1+1/7) x 0.5-T milliseconds, and ending the data frame after delaying (2+1/7) x 0.5 milliseconds again. For the control signal, the high level is output when the above-described downlink slot exists and continues, and the low level is output when it is delayed (i.e., when it is in the uplink slot). The above T is a constant, and is a time required for detecting the downlink signal power. When the power duration of the downstream signal is detected as either (3+5/7) ×0.5ms, there is actually only one possibility that is currently at two consecutive downstream slots in fig. 3, at which point the data frame ends after the end of the downstream slot, as long as (2+1/7) ×0.5ms has elapsed. Such a synchronous detected downstream power controls the amplifier upstream and downstream channels of the current signal, which is simpler but may have some delay. As described above, the time delay value from the reception of the downlink signal to the detection of the power is set to T (ms), and the current position in the data frame is determined by the duration of the downlink signal obtained by the power detection. And calculating and delaying the channel opening time point and time length from the downlink power ending time to the next downlink time period, and opening the uplink channel in the rest time. When the control signal is at a high level, the downlink channel of the relay amplifier is switched on, and the uplink channel is switched off; and when the control signal is at a low level, the downstream channel of the relay amplifier is turned off and the upstream channel is turned on.
The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A relay amplifier for a time division multiplexing mobile network for implementing amplified transmission of uplink and downlink signals between a donor antenna and a retransmission antenna, characterized in that the relay amplifier comprises a first radio frequency switch, a second radio frequency switch, a control signal generating unit and a power amplifying unit;
the control signal generating unit obtains signals from the donor antenna through a coupler, processes the obtained signals and generates control signals, and the control signals are respectively transmitted to and controlled by the first radio frequency switch and the second radio frequency switch;
under the action of the control signals, the first radio frequency switch and the second radio frequency switch respectively enable different input ends or output ends of the power amplification unit to be connected to the donor antenna or the retransmission antenna through the same switching action so as to realize the amplification transmission of the uplink signals or the amplification transmission of the downlink signals;
the power amplifying unit is provided with two input ends and two output ends, and signals input by the two input ends are amplified by the power amplifier and output by the two output ends; one input end and one output end are connected to the two switch ends of the first radio frequency switch, and the other input end and the other output end are connected to the two switch ends of the second radio frequency switch.
2. The repeater amplifier for a time division multiplexing mobile network according to claim 1, wherein the first radio frequency switch and the second radio frequency switch have the same structure, each include a signal terminal, a first switch terminal and a second switch terminal, and the signal terminals of the first radio frequency switch and the second radio frequency switch are respectively connected with the first switch terminal or the second switch terminal thereof under the action of a control signal; the signal end of the first radio frequency switch is connected with the donor antenna, and the signal end of the second radio frequency switch is connected with the retransmission antenna.
3. The repeater amplifier for a time division multiplexing mobile network according to claim 2, wherein a first switch terminal of the first radio frequency switch is connected to one input terminal of the power amplifying unit, and a second switch terminal of the first radio frequency switch is connected to one output terminal of the power amplifying unit; the first switch end of the second radio frequency switch is connected with the other output end of the power amplifying unit; and a second switch end of the second radio frequency switch is connected with the other input end of the power amplifying unit.
4. A repeater amplifier for a time division multiplexed mobile network according to claim 3, wherein the power amplifying unit comprises an input power splitter, an amplifying module and an output power splitter; the input power divider comprises two signal input ends and a signal output end, and the two signal input ends of the input power divider are respectively input ends of the power amplifying unit; the output end of the input power distributor is connected with the input end of the amplifying module; the output power distributor comprises a signal input end and two signal output ends, wherein the signal input end of the output power distributor is connected with the output end of the amplifying module, and the two output ends of the output power distributor are respectively and electrically connected with the two output ends of the power amplifying unit.
5. The repeater amplifier for a time division multiplexed mobile network according to claim 4, wherein the power amplifying unit further comprises two adjustable attenuators respectively connected in series between the output of the output power divider and the output of the power amplifying unit.
6. The repeater amplifier for a time division multiplexed mobile network of claim 5, wherein the amplifying module comprises a low noise amplifier and a power amplifier in series.
7. The repeater amplifier for a time division multiplexing mobile network according to claim 1, wherein the control signal generating unit comprises a power detecting module; the power detection module outputs different level signals as control signals according to the frame format of the current wireless network by receiving the downlink signal power on the donor antenna and according to the existence of the downlink signal power, wherein the different levels of the control signals represent the current uplink time slot or the downlink time slot.
8. The repeater of claim 7, wherein the power detection module outputs a control signal indicating a current downlink time slot when detecting downlink power, detects a duration of the current downlink power, determines a position of the current downlink time slot in a data frame of the current wireless network, and determines a duration of an adjacent uplink time slot according to a structure of the data frame, thereby obtaining a duration of the control signal indicating the uplink time slot after the downlink power is lost.
9. The repeater amplifier for a time division multiplexed mobile network according to claim 8, wherein the duration of the uplink time slot is a constant value from which a detection time for detecting downlink power is subtracted.
10. The repeater amplifier for a time division multiplexing mobile network according to claim 8, wherein the power detection module converts the control signal to a level representing a downlink slot and maintains a set time after maintaining a control signal level representing an uplink slot for a set time according to a frame structure of the data frame in case that an additional downlink slot is also present in the data frame.
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| CN202320335235.0U CN219611789U (en) | 2023-02-28 | 2023-02-28 | Relay amplifier for use in a time division multiplexed mobile network |
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