CN110224704B - Radio frequency system and base station equipment - Google Patents
Radio frequency system and base station equipment Download PDFInfo
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- CN110224704B CN110224704B CN201810169906.4A CN201810169906A CN110224704B CN 110224704 B CN110224704 B CN 110224704B CN 201810169906 A CN201810169906 A CN 201810169906A CN 110224704 B CN110224704 B CN 110224704B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
Abstract
The invention provides a radio frequency system and base station equipment, the radio frequency system includes: the system comprises a radio frequency transceiver, at least two radio frequency front ends and at least two transceiving antennas, wherein the transceiving antennas correspond to the radio frequency front ends one to one; each radio frequency front end is connected between the corresponding receiving and transmitting antenna and the radio frequency transceiver; each radio frequency front end is used for transmitting signals of at least two different frequency bands received by the corresponding transceiving antenna to the radio frequency transceiver, and transmitting signals of a first frequency band transmitted by the radio frequency transceiver to the corresponding transceiving antenna. The radio frequency system and the base station equipment provided by the invention can support the asymmetric uplink carrier aggregation function, meet the requirement that the uplink throughput is greater than the downlink throughput, avoid the interference to the adjacent frequency band when the SUL (subscriber identity module) of the uplink frequency band is supplemented with high-power transmission, and simultaneously reduce the equipment cost and the engineering complexity.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a radio frequency system and a base station device.
Background
In the requirements of the common public network, the general downlink throughput is greater than the uplink throughput, and therefore, in the general LTE standard, symmetric carrier aggregation and asymmetric downlink carrier aggregation are defined, and the number of downlink carriers is required to be greater than or equal to the number of uplink carriers, so that the requirements of the common public network can be met, and corresponding base station equipment is also introduced by equipment manufacturers. But in some industry wireless communication networks, for example: in a network with a large amount of video monitoring services, the uplink throughput is required to be greater than the downlink throughput. At present, the carrier aggregation scheme defined in the general LTE standard cannot meet such requirements, and therefore, an asymmetric uplink carrier aggregation technology in which the number of uplink carriers is greater than that of downlink carriers needs to be adopted.
However, currently, no corresponding base station device supports an asymmetric uplink carrier aggregation technology.
Disclosure of Invention
The invention provides a radio frequency system and base station equipment, which are used for supporting an asymmetric uplink carrier aggregation technology.
In a first aspect, the present invention provides a radio frequency system, comprising: the system comprises a radio frequency transceiver, at least two radio frequency front ends and at least two transceiving antennas, wherein the transceiving antennas correspond to the radio frequency front ends one to one; each radio frequency front end is connected between a corresponding transceiving antenna and the radio frequency transceiver;
each radio frequency front end is used for transmitting signals of at least two different frequency bands received by the corresponding transceiving antenna to the radio frequency transceiver, and transmitting signals of a first frequency band transmitted by the radio frequency transceiver to the corresponding transceiving antenna.
Optionally, each of the radio frequency front ends includes: the system comprises a multiplexer, a transmitting path and at least two receiving paths;
the output end of the transmitting channel is connected with the receiving and transmitting antenna through the multiplexer, and the input end of the transmitting channel is connected with the radio frequency transceiver; the input end of each receiving channel is connected with the transceiving antenna through the multiplexer, and the output end of each receiving channel is connected with the radio frequency transceiver;
the transmitting path is used for transmitting signals of the first frequency band, and the at least two receiving paths are used for transmitting signals of the at least two different frequency bands.
Optionally, the transmission path includes a power amplifier and an isolator, an input end of the power amplifier is connected to the radio frequency transceiver, an output end of the power amplifier is connected to an input end of the isolator, and an output end of the isolator is connected to the multiplexer.
Optionally, each of the receiving paths includes a low noise amplifier, an input end of the low noise amplifier is connected to the multiplexer, and an output end of the low noise amplifier is connected to the radio frequency transceiver.
Optionally, the multiplexer is a duplexer, and the number of the receiving paths is one.
Optionally, the receiving path includes a low noise amplifier, a power divider, and at least two filters; the input end of the low noise amplifier is connected with the duplexer, the output end of the low noise amplifier is connected with the input end of the power divider, at least two output ends of the power divider are respectively connected with the input ends of the at least two filters, and the output ends of the at least two filters are respectively connected with the radio frequency transceiver; the at least two filters are respectively used for filtering the received signals to separate and obtain the signals of the at least two different frequency bands.
Optionally, one of the at least two signals in different frequency bands and the first frequency band are symmetric frequency bands, and the other frequency bands are asymmetric frequency bands.
Optionally, the radio frequency system further includes at least two single-receiving antennas and radio frequency front ends corresponding to the at least two single-receiving antennas;
the radio frequency front end is used for transmitting the signals of the at least two different frequency bands received by the corresponding single receiving antenna to the radio frequency transceiver.
Optionally, the number of the transceiver antennas is two, and the number of the single transceiver antennas is two.
In a second aspect, the present invention provides a base station device, including the radio frequency system according to any one of the first aspect.
The invention provides a radio frequency system and base station equipment, wherein the radio frequency system comprises a radio frequency transceiver, at least two radio frequency front ends and at least two transceiving antennas, the transceiving antennas correspond to the radio frequency front ends one by one, and each radio frequency front end is connected between the corresponding transceiving antenna and the radio frequency transceiver; each radio frequency front end is used for transmitting signals of at least two different frequency bands received by the corresponding transceiving antenna to the radio frequency transceiver, and transmitting signals of a first frequency band transmitted by the radio frequency transceiver to the corresponding transceiving antenna. Therefore, each radio frequency front end can support a downlink transmitting signal of a frequency band and a plurality of uplink receiving signals of different frequency bands, that is, the radio frequency front end can support the condition that the number of uplink carriers is greater than that of downlink carriers, so that the asymmetric uplink carrier aggregation function can be realized, and the requirement that the uplink throughput is greater than the downlink throughput can be met; a plurality of uplink receiving frequency bands supported by the radio frequency system share one receiving and transmitting antenna, so that the equipment cost can be reduced, and the engineering complexity can be reduced; in addition, each radio frequency front end of the radio frequency system only has one downlink transmitting frequency band, namely only receives and does not transmit in the asymmetric frequency band, thereby avoiding the interference to the adjacent frequency band when supplementing the SUL high-power transmission of the uplink frequency band; compared with the existing radio frequency system with non-carrier aggregation, the radio frequency system of the embodiment only adds the receiving channel corresponding to the asymmetric uplink carrier in the radio frequency system, and does not have great influence on the cost and the volume of the radio frequency system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a frequency spectrum of a network;
fig. 2 is a schematic diagram of uplink carrier aggregation in the network shown in fig. 1;
fig. 3 is a first schematic structural diagram of a first rf system according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first radio frequency system according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second embodiment of a radio frequency system provided in the present invention;
fig. 6 is a schematic structural diagram of a radio frequency system according to a third embodiment of the present invention;
fig. 7 is a schematic structural diagram of a fourth embodiment of the radio frequency system provided in the present invention;
fig. 8 is a schematic structural diagram of an embodiment of a base station device provided in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the requirements of the common public network, the general downlink throughput is greater than the uplink throughput, and therefore, in the general LTE standard, both symmetric carrier aggregation and asymmetric downlink carrier aggregation are defined, and the number of downlink carriers is required to be greater than or equal to the number of uplink carriers, so that the requirements of the common public network can be met, and corresponding base station equipment is also provided by equipment manufacturers. But in some industry wireless communication networks, for example: in a network with a large amount of video monitoring services, the uplink throughput is required to be greater than the downlink throughput. At present, the carrier aggregation scheme defined in the general LTE standard cannot meet such requirements, and therefore, an asymmetric uplink carrier aggregation technology in which the number of uplink carriers is greater than that of downlink carriers needs to be adopted.
However, currently, no corresponding base station device supports an asymmetric uplink carrier aggregation technology. The invention provides a radio frequency system and base station equipment, which are used for supporting an asymmetric uplink carrier aggregation technology.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
First, an implementation of asymmetric uplink carrier aggregation is described. Suppose the number of uplink carriers is M, the number of downlink carriers is N, and M > N. When asymmetric uplink carrier aggregation is realized, M uplink carriers and N downlink carriers can be decomposed into N carrier aggregation clusters, each carrier aggregation cluster comprises one downlink carrier and K uplink carriers, and K is an integer greater than or equal to 1. In each carrier aggregation cluster, a downlink carrier and one UpLink carrier corresponding to the downlink carrier form an FDD carrier, and the other UpLink carriers are defined as Supplemental UpLink (SUL) carriers.
Fig. 1 is a schematic frequency spectrum diagram of a network, as shown in fig. 1, the network includes a frequency band 1(351MHz-358MHz) and a frequency band 2(361MHz-368MHz), and the frequency band 1 and the frequency band 2 are symmetric frequency bands, where the frequency band 1 is an uplink frequency band and the frequency band 2 is a downlink frequency band; in addition, the network also comprises a frequency band 3(336MHz-340MHz), and the frequency band 3 is an asymmetric uplink frequency band. Fig. 2 is a schematic diagram of uplink carrier aggregation in the network shown in fig. 1, and as shown in fig. 2, carriers of three frequency bands in the network form a carrier aggregation cluster, where carriers of a frequency band 1 and a frequency band 2 form an FDD carrier, and a carrier of a frequency band 3 is an SUL carrier.
It should be noted that the radio frequency system and the base station device provided by the present invention may be used in all asymmetric uplink carrier aggregation scenarios, and are not limited to the scenario shown in fig. 1, and the scenario shown in fig. 1 is only an example. For convenience of description, the following embodiments all use the uplink carrier aggregation cases shown in fig. 1 and fig. 2 as examples for explanation.
Fig. 3 is a first schematic structural diagram of a first radio frequency system according to an embodiment of the present invention, and fig. 4 is a second schematic structural diagram of the first radio frequency system according to the present invention, as shown in fig. 3 and 4, the radio frequency system of the present embodiment includes: the system comprises a radio frequency transceiver, at least two radio frequency front ends and at least two transceiving antennas, wherein the transceiving antennas correspond to the radio frequency front ends one to one; each radio frequency front end is connected between a corresponding transceiving antenna and the radio frequency transceiver;
each radio frequency front end is used for transmitting signals of at least two different frequency bands received by the corresponding transceiving antenna to the radio frequency transceiver, and transmitting signals of a first frequency band transmitted by the radio frequency transceiver to the corresponding transceiving antenna.
Specifically, the radio frequency system may be used in a base station device, and a scenario for the base station device is taken as an example to describe a transmission and reception process of a signal. Taking fig. 3 as an example, for the downlink transmission signal of the base station, the radio frequency transceiver transmits the downlink transmission signal to the transceiver antenna through the radio frequency front end, and then the transceiver antenna transmits the downlink transmission signal. And for the uplink receiving signals of the base station, after receiving the uplink signals, the transceiving antenna transmits the uplink signals to the radio frequency transceiver through the radio frequency front end.
In addition, each radio frequency front end is configured to transmit signals of at least two different frequency bands received by the corresponding transceiver antenna to the radio frequency transceiver, and transmit a signal of a first frequency band transmitted by the radio frequency transceiver to the corresponding transceiver antenna, that is, the radio frequency system may be used to implement transmission of one downlink frequency band and reception of multiple uplink frequency bands, so that the radio frequency system may be applied to an asymmetric uplink carrier aggregation scenario.
Optionally, one of the at least two signals in different frequency bands and the first frequency band are symmetric frequency bands, and the other frequency bands are asymmetric frequency bands. For example: the signals of the at least two different frequency bands comprise signals of a second frequency band and a third frequency band, the first frequency band and the second frequency band are symmetrical frequency bands, and the third frequency band is an asymmetrical frequency band.
Taking the asymmetric uplink carrier aggregation cases shown in fig. 1 and fig. 2 as an example, in the radio frequency system shown in fig. 3, each radio frequency front end can be used to transmit downlink transmission signals of frequency band 2 and can be used to receive uplink reception signals of frequency band 1 and frequency band 3, thereby implementing asymmetric uplink carrier aggregation. For the asymmetric uplink frequency band 3, the radio frequency system of this embodiment only performs uplink reception, but does not perform transmission, so that interference to an adjacent frequency band can be avoided. For an FDD carrier consisting of a symmetrical frequency band 1 and a frequency band 2 and an SUL carrier corresponding to an asymmetrical frequency band 3, a transmitting and receiving antenna is shared, so that the equipment cost can be reduced, and the engineering complexity is reduced. Compared with the existing non-carrier aggregation radio frequency system, the radio frequency system of the embodiment only adds the receiving access corresponding to the SUL carrier in the radio frequency system, and cannot generate larger influence on the cost and the volume of the radio frequency system.
It should be noted that the radio frequency front end in this embodiment may have various implementations, which are not specifically limited in this embodiment, and reference may be made to the detailed descriptions of the second embodiment and the third embodiment for two alternative implementations.
As described above, the transceiving antennas can be used for uplink reception of the base station and downlink transmission of the base station, that is, fig. 3 shows a scenario in which two transceiving antennas are used to implement two-transmission and two-reception, and fig. 4 shows a scenario in which four transceiving antennas are used to implement four-transmission and four-reception. It should be noted that the number of the transmitting and receiving antennas in the present invention is not limited specifically, and fig. 3 and 4 are only examples.
In the radio frequency system of this embodiment, each radio frequency front end may support a downlink transmission signal of one frequency band and a plurality of uplink reception signals of different frequency bands, that is, may support a situation that the number of uplink carriers is greater than the number of downlink carriers, so that an asymmetric uplink carrier aggregation function may be implemented, and thus a requirement that the uplink throughput is greater than the downlink throughput may be satisfied; a plurality of uplink receiving frequency bands supported by the radio frequency system share one receiving and transmitting antenna, so that the equipment cost can be reduced, and the engineering complexity can be reduced; in addition, each radio frequency front end of the radio frequency system only has one downlink transmitting frequency band, namely only receives and does not transmit in the asymmetric frequency band, thereby avoiding the interference to the adjacent frequency band when supplementing the SUL high-power transmission of the uplink frequency band; compared with the existing radio frequency system with non-carrier aggregation, the radio frequency system of the embodiment only adds the receiving channel corresponding to the asymmetric uplink carrier in the radio frequency system, and does not have great influence on the cost and the volume of the radio frequency system.
Fig. 5 is a schematic structural diagram of a second embodiment of the radio frequency system according to the present invention, and the radio frequency system of this embodiment provides an alternative implementation manner of the radio frequency front end based on the above embodiments.
In the radio frequency system of this embodiment, each of the radio frequency front ends includes: multiplexer, a transmission path and at least two receiving paths.
The output end of the transmitting channel is connected with the receiving and transmitting antenna through the multiplexer, and the input end of the transmitting channel is connected with the radio frequency transceiver; the input end of each receiving channel is connected with the transceiving antenna through the multiplexer, and the output end of each receiving channel is connected with the radio frequency transceiver;
the transmitting path is used for transmitting signals of the first frequency band, and the at least two receiving paths are used for transmitting signals of the at least two different frequency bands.
Specifically, each rf front end includes a downlink transmit path and a plurality of uplink receive paths, so that the rf system of this embodiment can support an asymmetric uplink carrier aggregation function, that is, support an aggregation condition in which the number of uplink carriers is greater than the number of downlink carriers, thereby meeting a requirement that the uplink throughput is greater than the downlink throughput.
It can be understood that, in this embodiment, the number of uplink receiving paths is not particularly limited, and may be set according to the spectrum distribution situation of the actual network. In the radio frequency system shown in fig. 5, taking the network spectrum shown in fig. 1 and fig. 2 as an example, a case where each radio frequency front end includes one downlink transmission path and two uplink reception paths is illustrated. The downlink transmission path is used for transmitting signals of a frequency band 2, and the two uplink receiving paths are respectively used for receiving signals of the frequency band 2 and the frequency band 3.
As shown in fig. 5, the multiplexer is a triplexer implemented by three band-pass filters, and a downlink transmitting path and two uplink receiving paths are connected to the transceiver antenna through the triplexer, so that the radio frequency system can simultaneously transmit a downlink signal of a frequency band 2 and receive uplink signals of frequency bands 1 and 3, and signals between the frequency bands do not interfere with each other.
Optionally, the transmission path includes a power amplifier and an isolator, an input end of the power amplifier is connected to the radio frequency transceiver, an output end of the power amplifier is connected to an input end of the isolator, and an output end of the isolator is connected to the multiplexer.
Each receiving path comprises a low noise amplifier, wherein the input end of the low noise amplifier is connected with the multiplexer, and the output end of the low noise amplifier is connected with the radio frequency transceiver.
Specifically, as shown in fig. 5, in each rf front end, a downlink transmission signal of frequency band 2 sent by the rf transceiver passes through the power amplifier to obtain an amplified rf signal, and then the amplified rf signal is sent to the transceiver antenna through the isolator, and is transmitted to the wireless channel by the transceiver antenna. The uplink signals of the frequency band 1 and the frequency band 3 received by the transceiving antenna enter the receiving channels corresponding to the respective frequency bands after being filtered by the multiplexer, and are amplified by the low noise amplifier to obtain uplink signals, and the uplink signals of the two receiving channels are respectively sent to the radio frequency transceiver and are demodulated by the radio frequency transceiver.
The embodiment shown in fig. 5 may be used in any network that supports asymmetric uplink carrier aggregation, and for frequency band distribution in a certain network, if multiple uplink receiving frequency bands are adjacent frequency bands, the method of the third subsequent embodiment may also be adopted.
Fig. 6 is a schematic structural diagram of a third embodiment of the radio frequency system according to the present invention, and the radio frequency system of this embodiment provides another optional implementation manner of the radio frequency front end based on the above embodiments.
As shown in fig. 6, in the radio frequency system of this embodiment, each of the radio frequency front ends includes: a duplexer, a transmit path, and a receive path. The output end of the transmitting channel is connected with the transmitting and receiving antenna through the duplexer, and the input end of the transmitting channel is connected with the radio frequency transceiver; the input end of the receiving channel is connected with the receiving and transmitting antenna through the duplexer, and the output end of the receiving channel is connected with the radio frequency transceiver; the transmitting path is used for transmitting the signals of the first frequency band, and the receiving path is used for transmitting the signals of the at least two different frequency bands.
Specifically, each rf front end includes a transmitting path and a receiving path, the transmitting path is used for transmitting a transmitting signal of the transmitting rf transceiver to the transmitting antenna, and the receiving path is used for transmitting a receiving signal of the transmitting rf transceiver to the rf transceiver. The transmission signal is a downlink signal of a first frequency band, and the reception signal includes uplink signals of at least two different frequency bands, so that the radio frequency system of this embodiment can support an asymmetric uplink carrier aggregation function, that is, support an aggregation condition in which the number of uplink carriers is greater than the number of downlink carriers, and thus can meet a requirement that the uplink throughput is greater than the downlink throughput.
It can be understood that, in this embodiment, the number of frequency bands of the received signal in the receiving path is not specifically limited, and may be set according to the spectrum distribution of the actual network. In the radio frequency system shown in fig. 6, taking the network frequency spectrums shown in fig. 1 and fig. 2 as an example, a case where each radio frequency front end includes one transmission path and one reception path is illustrated, where the transmission path is used to transmit a downlink signal of a frequency band 2, and the reception path is used to receive uplink signals of the frequency bands 1 and 3. Specifically, as shown in fig. 6, the duplexer is a 20MHz/5MHz duplexer and implemented by two band pass filters, and the transmitting path and the receiving path are both connected to the transceiving antenna through the duplexer, so that the radio frequency system can simultaneously transmit the downlink signal of the frequency band 2 and receive the uplink signals of the frequency bands 1 and 3, and signals between the frequency bands do not interfere with each other.
Optionally, the transmission path includes a power amplifier and an isolator; the input end of the power amplifier is connected with the radio frequency transceiver, the output end of the power amplifier is connected with the input end of the isolator, and the output end of the isolator is connected with the duplexer.
The receiving path comprises a low noise amplifier, a power divider and at least two filters; the input end of the low noise amplifier is connected with the duplexer, the output end of the low noise amplifier is connected with the input end of the power divider, at least two output ends of the power divider are respectively connected with the input ends of the at least two filters, and the output ends of the at least two filters are respectively connected with the radio frequency transceiver; the at least two filters are respectively used for filtering the received signals to separate and obtain the signals of the at least two different frequency bands.
Specifically, as shown in fig. 6, in each rf front end, a downlink transmission signal of frequency band 2 sent by the rf transceiver first passes through the power amplifier to obtain an amplified rf signal, then passes through the isolator to be sent to the transceiver antenna, and is transmitted to the wireless channel by the transceiver antenna. The uplink signals received by a receiving and transmitting antenna are filtered by a duplexer to obtain uplink signals of a frequency band 1 and a frequency band 3, the uplink signals enter a receiving path and are amplified by a low noise amplifier, then the uplink signals enter a power divider, the uplink signals are divided into two paths, one path of the uplink signals is filtered by a filter to obtain uplink signals of the frequency band 1, the other path of the uplink signals is filtered by the filter to obtain uplink signals of the frequency band 3, the two paths of the uplink signals are respectively transmitted to a radio frequency transceiver, and the radio frequency transceiver demodulates and the like.
In this embodiment, compared with the second embodiment shown in fig. 5, the duplexer is used to replace the multiplexer in the second embodiment, so as to further reduce the volume and cost of the radio frequency system; the two uplink receiving paths are combined into one path, and share one low-noise amplifier, so that the complexity of realizing a radio frequency system can be reduced.
Fig. 7 is a schematic structural diagram of a fourth embodiment of the radio frequency system provided in the present invention, as shown in fig. 7, the radio frequency system of the present embodiment further includes, on the basis of the foregoing embodiment: the system comprises at least two single receiving antennas and radio frequency front ends corresponding to the at least two single receiving antennas.
The radio frequency front end is used for transmitting the signals of the at least two different frequency bands received by the corresponding single receiving antenna to the radio frequency transceiver.
It can be understood that the transmitting-receiving antenna is a main set antenna and can be used for transmitting and receiving at the same time, the single receiving antenna is a diversity antenna and is only used for receiving but not used for transmitting, and the frequency band of the received signal of the single receiving antenna is the same as that of the transmitting-receiving antenna, so that the single receiving antenna can be used for realizing diversity reception of data.
Optionally, the number of the transceiver antennas is two, and the number of the single transceiver antennas is two. Specifically, with reference to fig. 7, the radio frequency system shown in fig. 7 includes two transceiving antennas and two single receiving antennas, where the two transceiving antennas and the two single receiving antennas realize a scenario of two-transmitting and four-receiving, and the transceiving antennas are mainly antennas and are responsible for transmitting downlink signals of a frequency band 2 and receiving uplink signals of a frequency band 1 and a frequency band 3; the single receiving antenna is a diversity antenna, is only used for receiving uplink signals of the frequency band 1 and the frequency band 3, and is not used for transmitting. The radio frequency transceiver combines the received signals from the four antennas, thereby obtaining diversity gain, offsetting the influence of fast fading in the signal transmission process and improving the reliability of wireless channel transmission.
It should be noted that, as to the specific implementation of the rf front end corresponding to the single-receive antenna, reference may be made to the implementation of the receive path in the second embodiment and the third embodiment. And will not be described in detail herein.
Fig. 8 is a schematic structural diagram of an embodiment of a base station device provided by the present invention, and as shown in fig. 8, the base station device provided by the present invention includes the radio frequency system according to any of the above embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A radio frequency system, comprising: the system comprises a radio frequency transceiver, at least two radio frequency front ends and at least two transceiving antennas, wherein the transceiving antennas correspond to the radio frequency front ends one to one; each radio frequency front end is connected between a corresponding transceiving antenna and the radio frequency transceiver;
each radio frequency front end is used for transmitting signals of at least two different frequency bands received by the corresponding transceiving antenna to the radio frequency transceiver and transmitting signals of a second frequency band transmitted by the radio frequency transceiver to the corresponding transceiving antenna; the signals of the at least two different frequency bands comprise signals of a first frequency band and a third frequency band, the first frequency band and the second frequency band are symmetrical frequency bands, and the third frequency band is an asymmetrical frequency band; the first frequency band and the second frequency band form an FDD carrier, and the third frequency band corresponds to an SUL carrier;
each of the radio frequency front ends comprises: the receiving path of the first frequency band and the receiving path of the third frequency band are connected with the same multiplexer and a low noise amplifier.
2. The radio frequency system according to claim 1, wherein an output terminal of the transmission path is connected to the transceiving antenna through the multiplexer, and an input terminal thereof is connected to the radio frequency transceiver; the input end of each receiving channel is connected with the transceiving antenna through the multiplexer, and the output end of each receiving channel is connected with the radio frequency transceiver;
the transmitting path is used for transmitting signals of the second frequency band, and the at least two receiving paths are used for transmitting signals of the at least two different frequency bands.
3. The radio frequency system according to claim 2,
the transmitting path comprises a power amplifier and an isolator, wherein the input end of the power amplifier is connected with the radio frequency transceiver, the output end of the power amplifier is connected with the input end of the isolator, and the output end of the isolator is connected with the multiplexer.
4. The radio frequency system according to claim 3,
the input end of the low noise amplifier is connected with the multiplexer, and the output end of the low noise amplifier is connected with the radio frequency transceiver.
5. The radio frequency system according to claim 3, wherein the multiplexer is a duplexer.
6. The radio frequency system according to claim 5,
the at least two receiving paths comprise a low noise amplifier, a power divider and at least two filters; the input end of the low noise amplifier is connected with the duplexer, the output end of the low noise amplifier is connected with the input end of the power divider, at least two output ends of the power divider are respectively connected with the input ends of the at least two filters, and the output ends of the at least two filters are respectively connected with the radio frequency transceiver; the at least two filters are respectively used for filtering the received signals to separate and obtain the signals of the at least two different frequency bands.
7. The RF system of claim 6, wherein one of the at least two different frequency bands is symmetric with respect to the second frequency band, and the other two different frequency bands are asymmetric.
8. The radio frequency system according to any of claims 1-7, further comprising at least two single-receive antennas and radio frequency front ends corresponding to the at least two single-receive antennas;
the radio frequency front end is used for transmitting the signals of the at least two different frequency bands received by the corresponding single receiving antenna to the radio frequency transceiver.
9. The rf system of claim 8, wherein the number of the transceiving antennas is two, and the number of the single transceiving antennas is two.
10. A base station arrangement, characterized in that it comprises a radio frequency system according to any of claims 1-9.
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| CN113178682B (en) * | 2021-05-06 | 2022-08-12 | 深圳市中天迅通信技术股份有限公司 | Base station antenna equipment for 5G network |
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| CN101026386A (en) * | 2006-02-22 | 2007-08-29 | 中兴通讯股份有限公司 | Base station, mobile terminal and method for comprehensive using paired and nonpaired spectrum |
| CN105450371A (en) * | 2014-07-31 | 2016-03-30 | 成都鼎桥通信技术有限公司 | Asymmetric uplink carrier aggregation method and device |
| CN105846849A (en) * | 2016-03-31 | 2016-08-10 | 宇龙计算机通信科技(深圳)有限公司 | Carrier aggregation circuit realization method and realization system, and mobile terminal |
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| CN101026386A (en) * | 2006-02-22 | 2007-08-29 | 中兴通讯股份有限公司 | Base station, mobile terminal and method for comprehensive using paired and nonpaired spectrum |
| CN105450371A (en) * | 2014-07-31 | 2016-03-30 | 成都鼎桥通信技术有限公司 | Asymmetric uplink carrier aggregation method and device |
| CN105846849A (en) * | 2016-03-31 | 2016-08-10 | 宇龙计算机通信科技(深圳)有限公司 | Carrier aggregation circuit realization method and realization system, and mobile terminal |
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