A radio frequency unit, an antenna and a signal processing method

Abstract

The embodiment of the present application discloses a radio frequency unit, an antenna and a signal processing method, which are used for receiving an uplink signal in a downlink time slot, the uplink signal comprising signals of N frequency bands, filtering and amplifying the signals of the N frequency bands, then converting the uplink signal into a digital intermediate frequency signal, and processing the digital intermediate frequency signal. The present application is used for reducing communication delay and improving uplink rate.

Description

Technical Field

[0001] This application relates to the field of communications, and more particularly to a radio frequency unit, an antenna, and a signal processing method. Background Technology

[0002] With the development of mobile communication, applications such as mobile phone live streaming, high-definition video live streaming via telephone, new media live streaming, camera monitoring, and real-time data uploading from factory production lines have emerged. These applications all upload data in real time through mobile communication, and their demands for uplink experience, uplink speed, and uplink latency are becoming increasingly strong.

[0003] The current 5G new radio (NR) system is divided into two standards: frequency division duplex (FDD) and time division duplex (TDD). TDD refers to the time-division multiplexing of downlink and uplink signals within the same frequency band. In the uplink time slot, the user equipment sends uplink signals to the base station, and in the downlink time slot, the base station sends downlink signals to the user equipment.

[0004] However, TDD systems have a large proportion of downlink time slots and a small proportion of uplink time slots. When a TDD system is operating in a downlink time slot, it cannot receive uplink signals, resulting in a large time delay. Summary of the Invention

[0005] The first aspect of this application provides a radio frequency (RF) unit, which includes a multiplexer, a low-noise amplifier, an RF analog-to-digital converter (ADC), and a digital intermediate frequency (IF) module. The multiplexer includes N filters, where N is an integer greater than 1. The multiplexer filters uplink signals from an antenna within a downlink time slot to obtain a filtered uplink signal, which includes signals from N frequency bands. After the multiplexer filters the uplink signal, the low-noise amplifier amplifies the filtered uplink signal to obtain an amplified filtered uplink signal. The RF ADC converts the amplified filtered uplink signal into a first digital IF signal. The digital IF module processes the first digital IF signal.

[0006] In this embodiment of the application, the radio frequency unit can process the uplink signal within the downlink time slot, thereby reducing latency.

[0007] In one possible implementation, the radio frequency unit may further include a master frequency filter for filtering the master frequency uplink signal from the antenna within the uplink time slot to obtain a filtered master frequency uplink signal, which is a signal in the master frequency band; a multiplexer may also be used to filter the uplink signal within the uplink time slot to obtain a filtered uplink signal; a low-noise amplifier may also be used to amplify the filtered uplink signal and the uplink signal to obtain an amplified filtered uplink signal and an amplified filtered master frequency uplink signal; a radio frequency analog-to-digital converter may also be used to convert the amplified filtered uplink signal and the amplified filtered master frequency uplink signal into a second digital intermediate frequency signal; and a digital intermediate frequency module may also be used to process the second digital intermediate frequency signal.

[0008] In this embodiment of the application, the radio frequency unit can also process the main frequency uplink signal and the uplink signal in the uplink time slot, thereby improving the uplink rate.

[0009] In one possible implementation, the radio frequency unit may further include a single-pole multiple-throw switch (SPMDS) used to connect a target filter in a downlink time slot multiplexer. The target filter is used to filter the target frequency band signal in the uplink signal to obtain a target uplink filtered signal. A low-noise amplifier is also used to amplify the target uplink filtered signal to obtain an amplified target uplink filtered signal. An RF analog-to-digital converter is also used to convert the amplified target uplink filtered signal into a third digital intermediate frequency (IF) signal. A digital IF module is also used to process the third digital IF signal.

[0010] In this embodiment, the radio frequency unit can process the target frequency band signal in the uplink signal within the downlink time slot using a single-pole multiple-throw switch, thereby improving the flexibility of the solution.

[0011] In one possible implementation, the low-noise amplifier includes either a broadband low-noise amplifier or a set of adjustable gain amplifiers, where each adjustable gain amplifier in the set corresponds to each of the N filters.

[0012] In this application embodiment, the specific form of the low-noise amplifier is defined, which improves the feasibility of the solution.

[0013] A second aspect of this application provides a radio frequency (RF) unit, which includes a filter, a low-noise amplifier, an RF analog-to-digital converter (ADC), and a digital intermediate frequency (IF) module. The filter is used to filter an uplink signal from an antenna within a downlink time slot to obtain a filtered uplink signal. This uplink signal includes signals from a target frequency band among N frequency bands, where N is an integer greater than 1. The low-noise amplifier can be a wideband low-noise amplifier, which amplifies the filtered uplink signal to obtain an amplified filtered uplink signal. The RF ADC converts the amplified filtered uplink signal into a digital IF signal. The digital IF module processes the digital IF signal.

[0014] In this embodiment, the radio frequency unit can process the uplink signal of the target frequency band within the downlink time slot, which improves the feasibility of the solution.

[0015] A third aspect of this application provides a radio frequency (RF) unit, which includes a duplexer, a low-noise amplifier, an RF analog-to-digital converter (ADC), and a digital intermediate frequency (IF) module. The duplexer filters an uplink signal from an antenna within a downlink time slot to obtain a filtered uplink signal. The uplink signal includes a signal from a target frequency band among N frequency bands, where N is an integer greater than 1. The low-noise amplifier can be a wideband low-noise amplifier, which amplifies the filtered uplink signal to obtain an amplified filtered uplink signal. The RF ADC converts the amplified filtered uplink signal into a digital IF signal. The digital IF module processes the digital IF signal.

[0016] In this embodiment, the radio frequency unit can process the uplink signal of the target frequency band within the downlink time slot, which improves the feasibility of the solution.

[0017] A fourth aspect of this application provides a radio frequency (RF) unit applicable to a frequency division duplex (FDD) system. The RF unit includes a multiplexer, a low-noise amplifier, an RF analog-to-digital converter (ADC), a digital intermediate frequency (IF) module, and a duplexer. The multiplexer filters an uplink signal from an antenna to obtain a filtered uplink signal, which includes signals from N frequency bands, where N is an integer greater than 1. The duplexer filters a main frequency uplink signal from the antenna to obtain a filtered main frequency uplink signal, which is a signal from a first main frequency band. The low-noise amplifier amplifies the filtered uplink signal and the filtered main frequency uplink signal to obtain an amplified filtered uplink signal and an amplified filtered main frequency uplink signal. The RF ADC converts the amplified filtered uplink signal and the amplified filtered main frequency uplink signal into a first digital IF signal.

[0018] In this embodiment, the radio frequency unit can process uplink signals including signals from N frequency bands and the main frequency uplink signal, thereby improving the uplink rate.

[0019] In one possible implementation, the digital intermediate frequency module can also be used to convert the baseband signal into a second digital intermediate frequency signal; the radio frequency analog-to-digital converter can also be used to convert the second digital intermediate frequency signal into a radio frequency signal; the power amplifier can also be used to amplify the radio frequency signal to obtain an amplified radio frequency signal; and the duplexer can also be used to filter the amplified radio frequency signal to obtain a main frequency downlink signal, which is a signal of the second main frequency band.

[0020] In one possible implementation, the low-noise amplifier includes either a broadband low-noise amplifier or a set of adjustable gain amplifiers, where each adjustable gain amplifier in the set corresponds to each of the N filters.

[0021] A fifth aspect of this application provides a radio frequency (RF) unit applicable to an FDD system. The RF unit includes a multiplexer, a low-noise amplifier (LNO) bandwidth, an RF analog-to-digital converter (ADC), a digital intermediate frequency (IF) module, a power amplifier, and a main frequency filter. The multiplexer filters uplink signals from an antenna to obtain a filtered uplink signal, which includes signals across N frequency bands, where N is an integer greater than 1. The LNO amplifies the filtered uplink signal to obtain an amplified filtered uplink signal. The ADC converts the filtered uplink signal into a first IF signal. The IF module processes the first IF signal and further converts a baseband signal into a second IF signal. The ADC also converts the second IF signal into an RF signal. The power amplifier amplifies the RF signal to obtain an amplified RF signal. The main frequency filter filters the amplified RF signal to obtain a main frequency downlink signal.

[0022] In this embodiment, the radio frequency unit can process uplink signals including N frequency bands, thereby improving the uplink rate.

[0023] In one possible implementation, the low-noise amplifier includes either a broadband low-noise amplifier or a set of adjustable gain amplifiers, where each adjustable gain amplifier in the set corresponds to each of the N filters.

[0024] A sixth aspect of this application provides an antenna, which includes a main frequency antenna and a multi-frequency antenna. The multi-frequency antenna is used to receive uplink signals in a downlink time slot. The uplink signals include signals of N frequency bands, where N is an integer greater than 1. The multi-frequency antenna is also used to receive uplink signals in an uplink time slot. The main frequency antenna is used to transmit main frequency downlink signals in a downlink time slot. The main frequency downlink signals are signals of the main frequency band.

[0025] In this embodiment, the antenna can receive uplink signals within the downlink time slot, and the uplink signals include signals from N frequency bands, thus reducing latency.

[0026] In one possible implementation, the multi-frequency antenna includes N independent antenna elements, which correspond to N antenna ports. The N independent antenna elements are associated with signals in each frequency band of the uplink signal.

[0027] In this application embodiment, the specific form of the multi-frequency antenna is defined, thereby improving the feasibility of the solution.

[0028] In one possible implementation, the multi-frequency antenna includes a first antenna and a second antenna. The first antenna includes one antenna element, and the second antenna includes (NM) antenna elements. The first antenna is used to receive signals from M frequency bands out of N frequency bands. The M frequency bands correspond to the same antenna port, or the M frequency bands correspond to M different antenna ports, where M is an integer greater than or equal to 2. The second antenna is used to receive signals from (NM) frequency bands out of N frequency bands. The (NM) frequency bands correspond to (NM) different antenna ports.

[0029] In this application embodiment, the specific form of the multi-frequency antenna is defined, thereby improving the feasibility of the solution.

[0030] In one possible implementation, the multi-frequency antenna includes a first antenna and a second antenna. The first antenna corresponds to the same antenna element as the main frequency antenna. The first antenna is used to receive signals from S frequency bands out of N frequency bands. The S frequency bands correspond to the same antenna port, or the S frequency bands correspond to S different antenna ports, where S is an integer greater than or equal to 1. The second antenna includes (NS) antenna elements. The second antenna is used to receive signals from (NS) frequency bands out of N frequency bands. The (NS) frequency bands correspond to (NS) different antenna ports.

[0031] In this application embodiment, the specific form of the multi-frequency antenna is defined, thereby improving the feasibility of the solution.

[0032] A seventh aspect of this application provides an antenna, which includes a main frequency antenna and a multi-frequency antenna. The multi-frequency antenna is used to receive uplink signals in a downlink time slot. The uplink signals include signals from a target frequency band among N frequency bands, where N is an integer greater than 1. The main frequency antenna is used to receive main frequency uplink signals in the uplink time slot. The main frequency uplink signals are signals from the main frequency band. The main frequency antenna and the multi-frequency antenna correspond to the same antenna element, or the main frequency antenna and the multi-frequency antenna correspond to different antenna elements.

[0033] In this embodiment, the antenna can receive uplink signals within the downlink time slot, thereby reducing latency.

[0034] An eighth aspect of this application provides an antenna, which includes a main frequency antenna and a multi-frequency antenna. The multi-frequency antenna is used to receive uplink signals, which include signals of N frequency bands, where N is an integer greater than 1. The main frequency antenna is used to receive main frequency uplink signals, which are signals of a first main frequency band. The main frequency antenna is also used to transmit main frequency downlink signals, which are signals of a second main frequency band.

[0035] In this embodiment, the antenna can receive uplink signals through the first main frequency band and N frequency bands, and transmit downlink signals through the second main frequency band, thus improving uplink speed and uplink coverage.

[0036] A ninth aspect of this application provides an antenna, which includes a main frequency antenna and a multi-frequency antenna. The multi-frequency antenna is used to receive uplink signals, which include signals of N frequency bands, where N is an integer greater than 1. The main frequency antenna is used to transmit main frequency downlink signals, which are signals of the main frequency band.

[0037] In this embodiment, the antenna can receive uplink signals through N frequency bands, thereby improving the uplink speed.

[0038] The tenth aspect of this application provides a signal processing method in which an uplink signal from an antenna can be filtered during a downlink time slot to obtain a filtered uplink signal. The uplink signal includes signals of N frequency bands, where N is an integer greater than 1. After obtaining the filtered uplink signal, the filtered uplink signal can be amplified to obtain an amplified filtered uplink signal. Then, the amplified filtered uplink signal can be converted into a first digital intermediate frequency signal, and finally, the first digital intermediate frequency signal is processed.

[0039] In this embodiment of the application, uplink signals of N frequency bands can be processed within the downlink time slot, thereby reducing latency.

[0040] In one possible implementation, the main frequency uplink signal and the uplink signal from the antenna can be filtered during the uplink time slot to obtain a filtered main frequency uplink signal and a filtered uplink signal, which are the signals of the main frequency band. After that, the filtered uplink signal and the filtered main frequency uplink signal are amplified to obtain an amplified filtered uplink signal and an amplified filtered main frequency uplink signal. Then, the amplified filtered uplink signal and the amplified filtered main frequency uplink signal are converted into a second digital intermediate frequency signal. Finally, the second digital intermediate frequency signal is processed.

[0041] In this embodiment, the main frequency uplink signal and the uplink signals of N frequency bands can also be processed within the uplink time slot, thus improving the uplink speed.

[0042] In one possible implementation, filtering the uplink signal from the antenna within the downlink time slot can specifically involve filtering the target frequency band signal in the uplink signal from the antenna within the downlink time slot to obtain a target uplink filtered signal. After that, the target uplink filtered signal can be amplified to obtain an amplified target uplink filtered signal. Then, the amplified target uplink filtered signal can be converted into a third digital intermediate frequency signal, and finally, the third digital intermediate frequency signal can be processed.

[0043] In this embodiment, only the target frequency band signal in the uplink signal is processed within the downlink time slot, thereby improving the flexibility of the solution.

[0044] In one possible implementation, the method provided in the tenth aspect of this application can be applied to a radio frequency unit.

[0045] The eleventh aspect of this application provides a signal processing method in which uplink signals from an antenna are filtered during downlink time slots to obtain filtered uplink signals. The uplink signals include signals from a target frequency band among N frequency bands, where N is an integer greater than 1. After obtaining the filtered uplink signals, the filtered uplink signals are amplified to obtain amplified filtered uplink signals. Then, the amplified filtered uplink signals are converted into digital intermediate frequency (IF) signals, and finally, the digital IF signals are processed.

[0046] In this embodiment, the uplink signal can be processed within the downlink time slot. The uplink signal is the signal of the target frequency band among N frequency bands, thus improving the flexibility of the solution.

[0047] The twelfth aspect of this application provides a signal processing method applicable to an FDD system. This method filters uplink signals from an antenna and a main frequency uplink signal to obtain a filtered uplink signal and a filtered main frequency uplink signal. The uplink signal includes signals from N frequency bands, where N is an integer greater than 1. The main frequency uplink signal is a signal from a first main frequency band. Then, the filtered uplink signal and the filtered main frequency uplink signal are amplified to obtain amplified filtered uplink signals and amplified filtered main frequency uplink signals. These amplified filtered uplink signals and amplified main frequency uplink signals are then converted into a first digital intermediate frequency (IF) signal. Finally, the first IF signal is processed.

[0048] In this embodiment, uplink signals from N frequency bands and the main frequency uplink signal can be processed, thereby improving uplink speed and uplink coverage.

[0049] In one possible implementation, the baseband signal can be converted into a second digital intermediate frequency (IF) signal, then the second IF signal can be converted into a radio frequency (RF) signal, the RF signal can be amplified to obtain an amplified RF signal, and finally the amplified RF signal can be filtered to obtain a main frequency downlink signal, which is a signal of the second main frequency band.

[0050] In this embodiment of the application, while processing the uplink signal and the main frequency uplink signal, the main frequency downlink signal with the second main frequency band can also be transmitted, thus improving the completeness of the solution.

[0051] The thirteenth aspect of this application provides a signal processing method that can be applied to an FDD system. The method can filter uplink signals from an antenna to obtain a filtered uplink signal. The uplink signal includes signals in N frequency bands, where N is an integer greater than 1. Then, the filtered uplink signal is amplified to obtain an amplified filtered uplink signal. Finally, the filtered uplink signal is converted into a first digital intermediate frequency (IF) signal, and the first IF signal is processed.

[0052] In this embodiment of the application, uplink signals of N frequency bands can be processed to improve the uplink rate.

[0053] In one possible implementation, the baseband signal can be converted into a second digital intermediate frequency (IF) signal, then the second IF signal can be converted into a radio frequency (RF) signal, the RF signal can be amplified to obtain an amplified RF signal, and finally the amplified RF signal can be filtered to obtain the main frequency downlink signal.

[0054] The fourteenth aspect of this application provides a signal processing method that can receive uplink signals in downlink time slots, the uplink signals including signals of N frequency bands, where N is an integer greater than 1, and receive uplink signals in uplink time slots and transmit main frequency downlink signals in downlink time slots, where the main frequency downlink signals are signals of the main frequency band.

[0055] In this embodiment of the application, uplink signals from N frequency bands can be received within the downlink time slot, thus reducing latency.

[0056] The fifteenth aspect of this application provides a signal processing method that can receive uplink signals in downlink time slots. The uplink signals include signals of a target frequency band among N frequency bands, where N is an integer greater than 1. The method also receives a main frequency uplink signal in the uplink time slot, where the main frequency uplink signal is a signal of the main frequency band.

[0057] In this embodiment, uplink signals can be received within the downlink interval. These uplink signals are signals from the target frequency band among N frequency bands, thus reducing latency and improving the flexibility of the solution.

[0058] The sixteenth aspect of this application provides a signal processing method that can receive uplink signals and main frequency uplink signals, the uplink signals including signals of N frequency bands, where N is an integer greater than 1, the main frequency uplink signals being signals of a first main frequency band, and transmit main frequency downlink signals, the main frequency downlink signals being signals of a second main frequency band.

[0059] In this embodiment, uplink signals including N frequency bands and the main frequency uplink signal can be received, thus improving uplink speed and uplink coverage.

[0060] The seventeenth aspect of this application provides a signal processing method that can receive uplink signals, the uplink signals including signals of N frequency bands, where N is an integer greater than 1, and transmit a main frequency downlink signal, the main frequency downlink signal being a signal of the main frequency band.

[0061] In this embodiment of the application, uplink signals including N frequency bands can be received, thus improving the uplink rate.

[0062] An eighteenth aspect of this application provides a communication system, which includes any one of the radio frequency units of the first to fifth aspects described above, and / or any one of the antennas of the sixth to ninth aspects. Attached Figure Description

[0063] Figure 1a This is a structural diagram of an active antenna unit and a baseband processing unit;

[0064] Figure 1b This is a schematic diagram of the baseband processing unit, the remote radio frequency unit, and the antenna.

[0065] Figure 2 This is a schematic diagram showing the allocation of uplink and downlink time slots;

[0066] Figure 3 This is a schematic diagram of the communication frequency band distribution;

[0067] Figure 4 This is a schematic diagram of a communication system according to an embodiment of this application;

[0068] Figure 5 This is another schematic diagram of the communication system according to an embodiment of this application;

[0069] Figure 6 This is another schematic diagram of the communication system according to an embodiment of this application;

[0070] Figure 7 This is another schematic diagram of the communication system according to an embodiment of this application;

[0071] Figure 8 This is another schematic diagram of the communication system according to an embodiment of this application;

[0072] Figure 9 This is another schematic diagram of the communication system according to an embodiment of this application;

[0073] Figure 10 This is another schematic diagram of the communication system according to an embodiment of this application;

[0074] Figure 11 This is another schematic diagram of the communication system according to an embodiment of this application;

[0075] Figure 12 This is a schematic diagram of a combination of a multiplexer and an adjustable gain low-noise amplifier according to an embodiment of this application;

[0076] Figure 13 This is another structural schematic diagram of the multiplexer according to an embodiment of this application;

[0077] Figure 14 This is a schematic diagram of a combination of a band-stop filter and a multiplexer according to an embodiment of this application;

[0078] Figure 15 This is another schematic diagram of the communication system according to an embodiment of this application;

[0079] Figure 16 This is another schematic diagram of the communication system according to an embodiment of this application. Detailed Implementation

[0080] This application provides a radio frequency unit, an antenna, and a signal processing method that can receive uplink signals in the downlink time slot of the system, thereby improving the utilization rate of uplink signal reception resources in the TDD architecture and reducing latency.

[0081] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0082] Please see Figure 1a In this application embodiment, the radio frequency unit can be an active antenna unit (AAU), which also includes an antenna part, and the AAU is connected to the baseband processing unit;

[0083] Please see Figure 1b In this application embodiment, the radio frequency unit can also be a remote radio unit (RRU), which can be combined with the antenna provided in this application embodiment and connected to the baseband processing unit.

[0084] TDD (Time-Division Multiplexing) technology uses the same frequency band for time-division multiplexing of uplink and downlink signals. During the uplink time slot, user equipment (UE) sends signals to the base station; during the downlink time slot, the base station sends signals to UE. Please refer to [link / reference]. Figure 2 “D” represents downlink subframe, “S” represents special subframe, and “U” represents uplink subframe. In TDD, different operators generally have a fixed ratio of uplink to downlink time slots. For example, operator A has a 2:8 ratio of uplink to downlink time slots, while operator B has a 3:7 ratio. Taking a 100MHz bandwidth as an example, if the ratio of uplink to downlink time slots is 2:8, the equivalent uplink bandwidth is only 20MHz, so the uplink rate will be limited.

[0085] Each operator typically has multiple frequency bands, used for both TDD and FDD standards. Please refer to [link / reference]. Figure 3The operator's frequency bands include FDD uplink bands, FDD downlink bands, and TDD uplink and downlink bands. Among these, there are both continuous, high-bandwidth main frequency bands and scattered, narrow-bandwidth fragmented frequency bands. In this application embodiment, one or more frequency bands from the fragmented uplink frequency bands can be flexibly selected for uplink signal reception according to different uplink rate requirements, uplink coverage requirements, and spectrum interference requirements. Uplink resources in the digital intermediate frequency module are flexibly allocated to each fragmented uplink frequency band. In the uplink time slot, the system receives uplink signals through the main frequency band and the fragmented frequency bands, or through any one of the main frequency band and the fragmented frequency bands. In the downlink time slot, the system transmits downlink signals through the main frequency band and receives uplink signals through the fragmented frequency bands.

[0086] Please see Figure 4 The RRU and antenna in this embodiment can be applied to a communication system:

[0087] The communication system includes a digital intermediate frequency module 401, an RF integrated chip 402, a power amplifier 403, a circulator 404, a main frequency filter 405, a main frequency antenna 406, a switch 408, a multi-frequency antenna 407, a multiplexer 409, and a broadband low-noise amplifier 410. The RF integrated chip 402 also includes an RF analog-to-digital converter 4021.

[0088] It should be noted that in this communication system, the RRU provided in this application embodiment includes a digital intermediate frequency module 401, an RF integrated chip 402, a power amplifier 403, a circulator 404, a main frequency filter 405, a switch 408, a multiplexer 409, and a broadband low noise amplifier 410. The antenna provided in this application embodiment includes a main frequency antenna 406 and a multi-frequency antenna 407. It should be noted that the above classification is only an example. In actual applications, there may be other classification methods. For example, some modules can be classified as antennas. This application does not limit this.

[0089] The following is an introduction to this communication system:

[0090] Taking the downlink time slot as an example:

[0091] The digital intermediate frequency module 401 is used to convert the baseband signal transmitted by the base station into a digital intermediate frequency signal and send the digital intermediate frequency signal to the radio frequency integrated chip 402. Here, the frequency of the baseband signal is the frequency of the main frequency band.

[0092] The radio frequency analog-to-digital converter 4021 in the radio frequency integrated chip 402 is used to convert the digital intermediate frequency signal into a radio frequency signal and send the radio frequency signal to the power amplifier 403;

[0093] Power amplifier 403 is used to amplify the radio frequency signal and send it to circulator 404;

[0094] Circulator 404 is used to transmit radio frequency signals to main frequency filter 405;

[0095] The main frequency filter 405 is used to filter the radio frequency signal and send it to the main frequency antenna 406;

[0096] The main frequency antenna 406 is used to transmit radio frequency signals into free space. The radio frequency signals are transmitted to the user equipment through free space. It should be noted that the radio frequency signals are the main frequency downlink signals.

[0097] The multi-frequency antenna 407 is used to receive uplink signals sent by user equipment, which include signals of N frequency bands, and to send the uplink signals to the multiplexer 409. Here, the multi-frequency antenna can be a broadband antenna, and the N frequency bands are scattered frequency bands.

[0098] The multiplexer 409 has N corresponding filters 4091 used to filter the signals of N frequency bands in the uplink signal to obtain the filtered uplink signal, and then sends the filtered uplink signal to the broadband low noise amplifier. In this process, the signals of N frequency bands in the uplink signal correspond to the same antenna port.

[0099] The broadband low-noise amplifier 410 is used to amplify the filtered uplink signal to obtain the amplified filtered uplink signal, and then sends it to the radio frequency integrated chip 4021.

[0100] The radio frequency analog-to-digital converter 4021 in the radio frequency integrated chip 402 is also used to convert the amplified filtered uplink signal into a first digital intermediate frequency signal and send it to the digital intermediate frequency module 401;

[0101] The digital intermediate frequency module 401 is also used to process the first digital intermediate frequency signal.

[0102] It should be noted that switch 408 is in the off state during the downlink time slot.

[0103] Taking the uplink time slot as an example:

[0104] It should be noted that during the uplink time slot, switch 408 is in the closed state, connecting circulator 404, main frequency filter 405 and multiplexer 409.

[0105] The main frequency antenna 406 is also used to receive the main frequency uplink signal sent by the user equipment and send it to the main frequency filter 405. The frequency of the main frequency uplink signal is the frequency of the main frequency band.

[0106] The main frequency filter 405 is also used to filter the main frequency uplink signal to obtain the filtered main frequency uplink signal, and then send it to the circulator 404.

[0107] Circulator 404 is used to send the filtered main frequency uplink signal to the multiplexer;

[0108] The multi-frequency antenna 407 is used to receive uplink signals sent by user equipment, which include signals of N frequency bands, and to send the uplink signals to the multiplexer 409. Here, the multi-frequency antenna 407 can be a broadband antenna, and the N frequency bands are scattered frequency bands.

[0109] The multiplexer 409 is used to filter the signals of N frequency bands in the uplink signal using N corresponding filters to obtain the filtered uplink signal, and then sends the filtered uplink signal and the filtered main frequency uplink signal to the broadband low noise amplifier.

[0110] The broadband low-noise amplifier 410 is also used to amplify the filtered uplink signal and the filtered main frequency uplink signal, and send them to the radio frequency integrated chip 402.

[0111] The radio frequency analog-to-digital converter 4021 in the radio frequency integrated chip 402 is also used to convert the amplified uplink signals of N frequency bands and the amplified main frequency uplink signal into a second digital intermediate frequency signal and send it to the digital intermediate frequency module 401.

[0112] The digital intermediate frequency module 401 is also used to process the second digital intermediate frequency signal.

[0113] In this embodiment, uplink signals can be received via multi-frequency antenna 407 during downlink time slots. During uplink time slots, both the main frequency uplink signal and the uplink signal can be received, or only the main frequency uplink signal can be received during uplink time slots. This fully utilizes the idle receiving resources in downlink time slots, improves uplink speed, and reduces latency. Furthermore, since there are low-frequency and mid-frequency bands in the scattered frequency bands, such as the 700MHz or 900MHz low-frequency band, signal transmission using the low-frequency band has the characteristics of low path loss and strong propagation capability, thus solving the uplink coverage problem in the prior art.

[0114] Please see Figure 5 Based on the above Figure 4 Based on this, the RRU and antenna provided in the embodiments of this application can also be applied to another communication system. In this communication system, the multi-frequency antenna in the antenna can include N independent antenna elements, wherein each antenna element corresponds to an antenna port.

[0115] The following is a description of the communication system:

[0116] Within the uplink and downlink time slots, N independent antenna elements 507 are used to receive uplink signals transmitted by user equipment. The uplink signals include signals in N frequency bands, and the N independent antenna elements correspond to the signals in the N frequency bands of the uplink signals.

[0117] The rest of the communication system is the same as described above. Figure 4 Similar to what was described in the previous article, the specifics will not be repeated here.

[0118] Please see Figure 6 Based on the above Figure 4 Based on the above, the RRU and antenna provided in this application embodiment can also be applied to another communication system. In this communication system, the multi-frequency antenna can include a first antenna 608 and a second antenna 607. The first antenna 608 includes an independent antenna element and is used to receive signals from M frequency bands out of N frequency bands, where N frequency bands are fragmented frequency bands. The second antenna 607 includes (NM) antenna elements, where M is an integer greater than or equal to 2. These (NM) antenna elements are used to receive signals from (NM) frequency bands out of N frequency bands, and there is a correspondence between the (NM) antenna elements and the signals from the (NM) frequency bands. It should be noted that the M frequency bands received by the first antenna 608 can correspond to M different antenna ports. In this case, the first antenna 608 can be a multi-frequency resonant antenna element. Alternatively, the M frequency bands can correspond to only one antenna port. In this case, the first antenna 608 can be a broadband antenna element. The specific situation is not limited here.

[0119] The following is a description of the communication system:

[0120] During the uplink and downlink time slots, the first antenna 608 receives uplink signals from M of the N frequency bands sent by the user equipment and sends the signals of the M frequency bands to the multiplexer 610.

[0121] The second antenna 607 is used to receive signals from (NM) frequency bands sent by the user equipment and to send the signals from the (NM) frequency bands to the multiplexer 610.

[0122] The rest of the communication system is the same as described above. Figure 4 Similar to what was described in the previous article, the specifics will not be repeated here.

[0123] Please see Figure 7 Based on the above Figure 4Based on the above, the RRU and antenna provided in this application embodiment can be applied to another communication system. In this communication system, the multi-frequency antenna may include a first antenna 707 and a second antenna 708. The first antenna 707 includes one antenna element, which is shared with the main frequency antenna 706. The first antenna 707 is used to receive signals from S frequency bands out of N frequency bands, where N frequency bands are fragmented frequency bands. The second antenna 708 includes (NS) antenna elements, where S is an integer greater than or equal to 1. These (NS) antenna elements are used to receive signals from (NS) frequency bands out of N frequency bands, and there is a correspondence between the (NS) antenna elements and the (NS) frequency band signals. It should be noted that the S frequency band signals received by the first antenna 707 may correspond to S different antenna ports. In this case, the first antenna 707 can be a multi-frequency resonant antenna element. Alternatively, the S frequency band signals may correspond to only one antenna port. In this case, the first antenna 707 can be a broadband antenna element. Specific cases are not limited here.

[0124] The architecture of this communication system is described below:

[0125] During the uplink and downlink time slots, the first antenna 707 receives uplink signals from S of the N frequency bands sent by the user equipment and sends the signals of the S frequency bands to the multiplexer 710.

[0126] The second antenna 708 is used to receive signals from (NS) frequency bands sent by the user equipment and to send the signals from the (NS) frequency bands to the multiplexer 710.

[0127] The rest are the same as above. Figure 4 Similar to what was described in the previous article, the specifics will not be repeated here.

[0128] Please see Figure 8 Based on the above Figure 4 Based on this, the RRU and antenna provided in the embodiments of this application can also be used in another communication system. In this communication system, the RRU also includes a single-pole multi-throw switch 810, and the broadband low-noise amplifier 811 can be connected to any filter 8091 in the multiplexer 809 through the single-pole multi-throw switch 810.

[0129] The following description of the communication system uses the downlink time slot as an example:

[0130] The multi-frequency antenna 808 is used to receive the uplink signal sent by the user equipment and send the uplink signal to the multiplexer 809. The uplink signal can be the signal of the target frequency band among N frequency bands. The multi-frequency antenna 808 can be a broadband antenna, and the N frequency bands are the scattered frequency bands.

[0131] The multiplexer 809 is used to filter the uplink signal using the filter 8091 corresponding to the target frequency band to obtain the target uplink filtered signal, and then send the target uplink filtered signal to the broadband low noise amplifier 811.

[0132] A single-pole multi-throw switch 810 is used to connect the filter 8091 to the broadband low-noise amplifier 811;

[0133] The broadband low-noise amplifier 811 is used to amplify the target uplink filtered signal to obtain the amplified target uplink filtered signal, and then send it to the radio frequency integrated chip 802.

[0134] The radio frequency integrated chip 802 is used to convert the amplified target uplink filtered signal into a third digital intermediate frequency signal using the radio frequency analog-to-digital converter 8021, and then send it to the digital intermediate frequency module 801.

[0135] The digital intermediate frequency module 801 is used to process the third digital intermediate frequency signal.

[0136] The rest are the same as above. Figure 4 Similar to what was described in the previous article, the specifics will not be repeated here.

[0137] The following description of the communication system uses the uplink time slot as an example:

[0138] Please see Figure 9 The single-pole multi-throw switch 910 is used to connect the circulator 904, the main frequency filter 905, and the broadband low-noise amplifier 911;

[0139] The main frequency antenna 906 is used to receive the main frequency uplink signal sent by the user equipment and send the main frequency uplink signal to the main frequency filter 905. The main frequency uplink signal is the signal of the main frequency band.

[0140] The main frequency filter 905 is used to filter the main frequency uplink signal to obtain a filtered main frequency uplink signal, and then sends the filtered main frequency uplink signal to the circulator 904.

[0141] Circulator 904 is used to send the filtered uplink signal to broadband low-noise amplifier 911 through single-pole multi-throw switch 910;

[0142] The broadband low-noise amplifier 911 is used to amplify the filtered main frequency uplink signal to obtain the amplified filtered main frequency uplink signal, and then send it to the RF integrated chip 902.

[0143] The radio frequency integrated chip 902 is used to convert the filtered main frequency uplink signal into a digital intermediate frequency signal using the radio frequency analog-to-digital converter 9021, and then send the digital intermediate frequency signal to the digital intermediate frequency module 901;

[0144] The digital intermediate frequency module 901 is used to process digital intermediate frequency signals.

[0145] Please see Figure 10 Based on the above Figure 4 Based on this, the RRU and antenna provided in the embodiments of this application can also be applied to another communication system in which the RRU removes the receiving channel used to receive the main frequency uplink signal in the switch and multiplexer. This communication system is an FDD architecture.

[0146] The following is a description of the communication system:

[0147] The digital intermediate frequency module 1001 is used to convert the baseband signal transmitted by the base station into a digital intermediate frequency signal, and send the digital intermediate frequency signal to the radio frequency integrated chip 1002. Here, the frequency of the baseband signal is the frequency of the main frequency band.

[0148] The radio frequency analog-to-digital converter 10021 in the radio frequency integrated chip 1002 is used to convert the digital intermediate frequency signal into a radio frequency signal and send the radio frequency signal to the power amplifier 1003;

[0149] The power amplifier 1003 is used to amplify the radio frequency signal and send it to the circulator 1004;

[0150] Circulator 1004 is used to transmit radio frequency signals to main frequency filter 1005;

[0151] The main frequency filter 1005 is used to filter the radio frequency signal and send it to the main frequency antenna 1006;

[0152] The main frequency antenna 1006 is used to transmit radio frequency signals into free space. The radio frequency signals are transmitted to the user equipment through free space. It should be noted that the radio frequency signals are the main frequency downlink signals.

[0153] The multi-frequency antenna 1007 is used to receive uplink signals sent by user equipment, which include signals of N frequency bands, and to send the uplink signals to the multiplexer 1009. Here, the multi-frequency antenna 1007 can be a broadband antenna, and the N frequency bands are scattered frequency bands.

[0154] The multiplexer 1009 is used to filter the signals of N frequency bands in the uplink signal using N corresponding filters 10091 respectively, to obtain the filtered uplink signal, and sends the filtered uplink signal to the broadband low noise amplifier 1010. Here, the signals of N frequency bands in the uplink signal correspond to the same antenna port.

[0155] The broadband low-noise amplifier 1011 is used to amplify the filtered uplink signal to obtain the filtered uplink signal, and then send the filtered uplink signal to the radio frequency integrated chip 1002.

[0156] The radio frequency analog-to-digital converter 10021 in the radio frequency integrated chip 1002 is also used to convert the amplified and filtered uplink signal into a digital intermediate frequency signal and send it to the digital intermediate frequency module 1001;

[0157] The digital intermediate frequency module 1001 is also used to process the digital intermediate frequency signal.

[0158] In this embodiment, the downlink signal is sent to the user equipment via the main frequency antenna, and the uplink signal sent by the user equipment is received in multiple frequency bands via the multi-frequency antenna, thus improving downlink performance.

[0159] Please see Figure 11 In the above Figure 4 Based on this, the RRU and antenna in the embodiments of this application can be applied to another communication system in which the switch is removed and the main frequency filter is replaced with a duplexer 1005.

[0160] The following is a description of the communication system:

[0161] The digital intermediate frequency module 1101 is used to convert the baseband signal transmitted by the base station into a digital intermediate frequency signal and send the digital intermediate frequency signal to the radio frequency integrated chip 1102. Here, the frequency of the baseband signal is the frequency of the main frequency band.

[0162] The radio frequency analog-to-digital converter 11021 in the radio frequency integrated chip 1102 is used to convert the digital intermediate frequency signal into a radio frequency signal and send the radio frequency signal to the power amplifier 1103;

[0163] Power amplifier 1103 is used to amplify the radio frequency signal and send it to circulator 1104;

[0164] Circulator 1104 is used to transmit radio frequency signals to duplexer 1105;

[0165] The duplexer 1105 is used to filter the radio frequency signal and send it to the main frequency antenna 1106;

[0166] The main frequency antenna 1106 is used to transmit radio frequency signals into free space, and the radio frequency signals are transmitted to the user equipment through free space.

[0167] It should be noted that the frequency of this radio frequency signal is as described above. Figure 3 The frequency of any one of the downlink frequency bands in the FDD system shown is also the frequency of the first main frequency band, and this radio frequency signal is the main frequency downlink signal;

[0168] The main frequency antenna 1106 is also used to receive the main frequency uplink signal sent by the user equipment and transmit it to the duplexer 1105. It should be noted that the frequency of this main frequency uplink signal is as described above. Figure 3 The frequency of any one of the uplink frequency bands in the FDD system shown is also the frequency of the second main frequency band.

[0169] The duplexer 1105 is also used to filter the main frequency uplink signal to obtain a filtered main frequency uplink signal, and send it to the multiplexer 1108.

[0170] The multi-frequency antenna 1107 is used to receive uplink signals sent by user equipment, the uplink signals including signals of N frequency bands, and send the uplink signals to the multiplexer 1108. Here, the multi-frequency antenna 1107 can be a broadband antenna, and the N frequency bands are scattered frequency bands.

[0171] The multiplexer 1108 is used to filter the N different frequency bands of the uplink signal using N corresponding filters 11081 to obtain the filtered uplink signal, and sends the filtered uplink signal and the filtered main frequency uplink signal to the broadband low noise amplifier 1109. Here, the N different frequency bands of the uplink signal correspond to one antenna port.

[0172] The broadband low-noise amplifier 1109 is also used to amplify the filtered uplink signal and the filtered main frequency uplink signal to obtain the amplified filtered uplink signal and the amplified filtered main frequency uplink signal, and send them to the radio frequency integrated chip 1102.

[0173] The radio frequency analog-to-digital converter 11021 in the radio frequency integrated chip 1102 is also used to convert the amplified filtered uplink signal and the amplified main frequency uplink signal into digital intermediate frequency signals and send them to the digital intermediate frequency module 1101.

[0174] The digital intermediate frequency module 1101 is also used to process the digital intermediate frequency signal.

[0175] In this embodiment, the main frequency antenna 1106 can transmit downlink signals and receive uplink signals through two different frequency bands, and the multi-frequency antenna 1107 can receive uplink signals through scattered frequency bands, thus improving uplink speed and uplink coverage.

[0176] Please see Figure 12 In the above Figures 4 to 11 Based on the RRU, this application embodiment also provides a combination of a multiplexer and an adjustable gain low-noise amplifier:

[0177] An adjustable gain low-noise amplifier 1202 is integrated after the filter 1201 of the different frequency band filtering channels in the multiplexer 1200 to improve the received noise figure. The broadband low-noise amplifier will be removed, and the signal will directly enter the RF integrated chip after passing through the multiplexer 1200.

[0178] Please see Figure 12 In the above Figures 4 to 11 Based on the RRU, this application embodiment further provides a combination of a multiplexer and a broadband low-noise amplifier:

[0179] Optionally, please refer to Figure 13 The multiplexer in this embodiment can also adopt a similar architecture to multiplexer 1300. A broadband low-noise amplifier 1302 is integrated after the filters 1301 of the different frequency band filtering channels in multiplexer 1300. A bypass selectable circuit 1305 is added to the broadband low-noise amplifier 1302. When the signal power of the target frequency band is too high, the switch 1303 on the bypass selectable circuit 1305 is closed, so the signal of that target frequency band is not amplified by the broadband low-noise amplifier 1302. When the signal power of the target frequency band is too low, the switch 1303 on the bypass selectable circuit 1305 is opened, so the signal of that frequency band is amplified by the broadband low-noise amplifier 1302, making the power of the signals in each frequency band similar. Alternatively, a filter 1304 can be connected after each broadband low-noise amplifier 1302; the specific connection is not limited here. This filter is used for further filtering of the signal.

[0180] Optionally, in the above Figures 4 to 11 Based on the multiplexer in the present application, the internal structure of the multiplexer in this embodiment may also employ a bulk acoustic wave filter or a surface acoustic wave filter to reduce insertion loss.

[0181] Optionally, please see Figure 14 In the above Figures 4 to 11 Based on the multiplexer in the present application embodiment, when the multiplexer 1400 internally uses a bulk acoustic wave filter 1402 or a surface acoustic wave filter 1402, a main frequency band stop filter 1401 can be added before the receiving channel of the multiplexer 1400 to filter the radio frequency signal transmitted by the main frequency antenna.

[0182] Optionally, in the above Figures 4 to 11 Based on the multiplexer in the present application, the multiplexer module in this embodiment can be an integrated chip or a combination of multiple separate devices.

[0183] Please see Figure 15The RRU and antenna provided in this application embodiment can also be applied to another communication system, which includes a digital intermediate frequency module 1501, an RF integrated chip 1502, a power amplifier 1503, a circulator 1504, a main frequency filter 1505, a main frequency antenna 1506, a multi-frequency antenna 1507, a filter 1508, a single-pole double-throw switch 1509, and a broadband low-noise amplifier 1510. The RF integrated chip 1502 also includes an RF analog-to-digital converter 15021.

[0184] It should be noted that in this communication system, the RRU includes a digital intermediate frequency module 1501, an RF integrated chip 1502, a power amplifier 1503, a circulator 1504, a main frequency filter 1505, a filter 1508, a single-pole double-throw switch 1509, and a broadband low-noise amplifier 1510. Among these, the RF integrated chip 1502 also includes an RF analog-to-digital converter 15021.

[0185] The antennas include the main frequency antenna 1506 and the multi-frequency antenna 1507.

[0186] It should be noted that the above classification is only an example. In actual applications, there may be other classification methods. For example, some modules can be classified as antennas. This application does not limit this.

[0187] The following description of the communication system uses the downlink time slot as an example:

[0188] The digital intermediate frequency module 1501 is used to convert the baseband signal transmitted by the base station into a digital intermediate frequency signal and send the digital intermediate frequency signal to the radio frequency integrated chip 1502. Here, the frequency of the baseband signal is the frequency of the main frequency band.

[0189] The radio frequency analog-to-digital converter 15021 in the radio frequency integrated chip 1502 is used to convert the digital intermediate frequency signal into a radio frequency signal and send the radio frequency signal to the power amplifier 1503;

[0190] Power amplifier 1503 is used to amplify the radio frequency signal and send it to circulator 1504;

[0191] Circulator 1504 is used to transmit radio frequency signals to main frequency filter 1505;

[0192] The main frequency filter 1505 is used to filter the radio frequency signal and send it to the main frequency antenna 1506.

[0193] The main frequency antenna 1506 is used to transmit radio frequency signals into free space. The radio frequency signals are transmitted to the user equipment through free space. It should be noted that the radio frequency signals are the main frequency downlink signals.

[0194] The multi-frequency antenna 1507 is used to receive uplink signals sent by user equipment, which include signals of the target frequency band among N frequency bands, and sends the uplink signal to the filter 1508. Here, the N frequency bands are scattered frequency bands, and the multi-frequency antenna 1507 can be a broadband antenna.

[0195] Filter 1508 is used to filter the uplink signal to obtain a filtered uplink signal, and then send it to broadband low-noise amplifier 1510.

[0196] The single-pole double-throw switch 1509 is used to connect the filter 1508 and the broadband low-noise amplifier 1510;

[0197] The broadband low-noise amplifier 1509 is used to amplify the filtered uplink signal to obtain the amplified filtered uplink signal, and then send it to the radio frequency integrated chip 1502.

[0198] The radio frequency analog-to-digital converter 15021 in the radio frequency integrated chip 1502 is used to convert the amplified filtered uplink signal into a digital intermediate frequency signal and send it to the digital intermediate frequency module 1501.

[0199] The digital intermediate frequency module 1501 is used to process the digital intermediate frequency signal.

[0200] The communication system of this application embodiment is described below using uplink time slot as an example:

[0201] In the uplink time slot, the single-pole double-throw switch 1509 is used to connect the broadband low-noise amplifier 1510, the circulator 1504 and the main frequency filter 1506.

[0202] The main frequency antenna 1506 is also used to receive the main frequency uplink signal sent by the user equipment and send it to the main frequency filter 1505. The frequency of the main frequency uplink signal is the frequency of the main frequency band.

[0203] The main frequency filter 1505 is also used to filter the main frequency uplink signal to obtain a filtered main frequency uplink signal;

[0204] Circulator 1504 is also used to transmit the filtered main frequency uplink signal to broadband low noise amplifier 1510;

[0205] The broadband low-noise amplifier 1510 is also used to amplify the filtered main frequency uplink signal to obtain the amplified filtered main frequency uplink signal, and send it to the RF integrated chip 1502.

[0206] The radio frequency analog-to-digital converter 15021 in the radio frequency integrated chip 1502 is used to convert the amplified filtered main frequency uplink signal into a digital intermediate frequency signal and send it to the digital intermediate frequency module 1501.

[0207] The digital intermediate frequency module 1501 is used to process digital intermediate frequency signals.

[0208] In this embodiment, within the downlink time slot, the base station can flexibly select a frequency band from the scattered frequency bands to receive the uplink signal sent by the user equipment. Within the uplink time slot, it can receive the main frequency uplink signal sent by the user equipment through the main frequency band, making full use of the receiving resources that are idle in the downlink time slot, reducing latency. Since uplink signals can also be received through scattered frequency bands within the uplink time slot, the uplink rate is improved. Since there are low-frequency bands and mid-frequency bands in the scattered frequency bands, such as the 700MHz or 900MHz low-frequency band, transmitting signals through the low-frequency band has the characteristics of low path loss and strong propagation capability, thus solving the uplink coverage problem of the original TDD system.

[0209] Please see Figure 16 The RRU and antenna provided in this application embodiment can be applied to another communication system, which includes a digital intermediate frequency module 1601, a radio frequency integrated chip 1602, a power amplifier 1603, a circulator 1604, an antenna 1606, a duplexer 1605, a single-pole double-throw switch 1607, and a broadband low-noise amplifier 1608. The radio frequency integrated chip 1602 also includes a radio frequency analog-to-digital converter 16021.

[0210] It should be noted that the RRU in this communication system includes a digital intermediate frequency module 1601, an RF integrated chip 1602, a power amplifier 1603, a circulator 1604, a duplexer 1605, a single-pole double-throw switch 1607, and a broadband low-noise amplifier 1608. Among these, the RF integrated chip 1602 also includes an RF analog-to-digital converter 16021.

[0211] Antenna 1606 includes a main frequency antenna and a multi-frequency antenna, with the main frequency antenna and the multi-frequency antenna corresponding to one antenna element;

[0212] It should be noted that the above classification is only an example. In actual applications, there may be other classification methods. For example, some modules can be classified as antennas. This application does not limit this.

[0213] The communication system of this application embodiment is described below using downlink time slots as an example:

[0214] The digital intermediate frequency module 1601 is used to convert the baseband signal transmitted by the base station into a digital intermediate frequency signal and send the digital intermediate frequency signal to the radio frequency integrated chip 1602. Here, the frequency of the baseband signal is the frequency of the main frequency band.

[0215] The radio frequency analog-to-digital converter 16021 in the radio frequency integrated chip 1602 is used to convert the digital intermediate frequency signal into a radio frequency signal and send the radio frequency signal to the power amplifier 1603;

[0216] Power amplifier 1603 is used to amplify the radio frequency signal and send it to circulator 1604;

[0217] Circulator 1604 is used to transmit radio frequency signals to duplexer 1605;

[0218] The duplexer 1605 is used to filter the radio frequency signal and send it to the antenna 1606;

[0219] Antenna 1606 is used to send the filtered radio frequency signal to free space. The radio frequency signal is transmitted to the user equipment through free space. It should be noted that the radio frequency signal is the main frequency downlink signal.

[0220] Antenna 1606 is also used to receive uplink signals sent by user equipment, which include signals of the target frequency band among N frequency bands, and send the uplink signals to duplexer 1605. Here, the N frequency bands are fragmented frequency bands, and antenna 1606 can be a broadband antenna.

[0221] The duplexer 1605 is also used to filter the uplink signal to obtain a filtered uplink signal and send it to the broadband low-noise amplifier 1608.

[0222] The single-pole double-throw switch 1607 is used to connect the duplexer 1605 and the broadband low-noise amplifier 1608;

[0223] The broadband low-noise amplifier 1608 is used to amplify the filtered uplink signal to obtain the amplified filtered uplink signal, and then send it to the radio frequency integrated chip 1602.

[0224] The radio frequency analog-to-digital converter 16021 in the radio frequency integrated chip 1602 is used to convert the amplified filtered uplink signal into a digital intermediate frequency signal and send it to the digital intermediate frequency module 1601.

[0225] The digital intermediate frequency module 1601 is used to process the digital intermediate frequency signal.

[0226] Please see Figure 16 The following description of the communication system uses the uplink time slot as an example:

[0227] Antenna 1606 is also used to receive the main frequency uplink signal sent by the user equipment and send it to duplexer 1605. The frequency of the main frequency uplink signal is the frequency of the main frequency band.

[0228] The duplexer 1605 is also used to filter the main frequency uplink signal to obtain a filtered main frequency uplink signal, and send it to the broadband low noise amplifier 1608.

[0229] The single-pole double-throw switch 1607 is also used to connect a duplexer 1605, a circulator 1604, and a broadband low-noise amplifier 1608.

[0230] The broadband low-noise amplifier 1608 is also used to amplify the filtered main frequency uplink signal to obtain the amplified filtered main frequency uplink signal, and send it to the RF integrated chip 1602.

[0231] The radio frequency analog-to-digital converter 16021 in the radio frequency integrated chip 1602 is also used to convert the amplified filtered main frequency uplink signal into a digital intermediate frequency signal and send it to the digital intermediate frequency module 1601;

[0232] The digital intermediate frequency module 1601 is also used to process the digital intermediate frequency signal.

[0233] In this embodiment, within the downlink time slot, the base station can flexibly select a frequency band from the scattered frequency bands to receive the uplink signal sent by the user equipment. Within the uplink time slot, it can receive the main frequency uplink signal sent by the user equipment through the main frequency band, making full use of the receiving resources that are idle in the downlink time slot, reducing latency. Since uplink signals can also be received through scattered frequency bands within the uplink time slot, the uplink rate is improved. Since there are low-frequency bands and mid-frequency bands in the scattered frequency bands, such as the 700MHz or 900MHz low-frequency band, transmitting signals through the low-frequency band has the characteristics of low path loss and strong propagation capability, thus solving the uplink coverage problem of the original TDD system.

[0234] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0235] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0236] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0237] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0238] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A radio frequency unit, characterized by The radio frequency unit comprises a multiplexer, a low noise amplifier, a radio frequency analog-to-digital converter and a digital intermediate frequency module. The multiplexer comprises N filters, and N is an integer greater than 1. The multiplexer is configured to perform filtering processing on the uplink signal from the antenna in a downlink time slot to obtain a filtered uplink signal, and the uplink signal comprises signals of N frequency bands. The low noise amplifier is configured to perform amplification processing on the filtered uplink signal to obtain an amplified filtered uplink signal. The radio frequency analog-to-digital converter is configured to convert the amplified filtered uplink signal into a first digital intermediate frequency signal. The digital intermediate frequency module is configured to process the first digital intermediate frequency signal.

2. The radio unit of claim 1, wherein, The radio frequency unit further comprises a main frequency filter. The main frequency filter is configured to perform filtering processing on a main frequency uplink signal from the antenna in an uplink time slot to obtain a filtered main frequency uplink signal, and the main frequency uplink signal is a signal of a main frequency band. The multiplexer is further configured to perform filtering processing on the uplink signal in the uplink time slot to obtain the filtered uplink signal. The low noise amplifier is configured to perform amplification processing on the filtered uplink signal and the uplink signal to obtain the amplified filtered uplink signal and an amplified filtered main frequency uplink signal. The radio frequency analog-to-digital converter is configured to convert the amplified filtered uplink signal and the amplified filtered main frequency uplink signal into a second digital intermediate frequency signal. The digital intermediate frequency module is configured to process the second digital intermediate frequency signal.

3. The radio unit of claim 2, wherein, The radio frequency unit further comprises a single-pole multi-throw switch. The single-pole multi-throw switch is configured to connect a target filter in the multiplexer in a downlink time slot, and the target filter is configured to perform filtering processing on a signal of a target frequency band in the uplink signal to obtain a target uplink filtered signal. The low noise amplifier is further configured to perform amplification processing on the target uplink filtered signal to obtain an amplified target uplink filtered signal. The radio frequency analog-to-digital converter is configured to convert the amplified target uplink filtered signal into a third digital intermediate frequency signal. The digital intermediate frequency module is configured to process the third digital intermediate frequency signal.

4. The radio unit of any one of claims 1 to 3, wherein, The low noise amplifier comprises a wideband low noise amplifier and any one of a set of adjustable gain amplifiers. Each adjustable gain amplifier in the set of adjustable gain amplifiers has a corresponding relationship with each filter in the N filters.

5. A radio unit, characterized by The application is applied to a frequency division duplex (FDD) system, and the system comprises a multiplexer, a low noise amplifier, a radio frequency analog-to-digital converter, a digital intermediate frequency module, a power amplifier and a duplexer. The multiplexer is configured to perform filtering processing on an uplink signal from an antenna to obtain a filtered uplink signal, and the uplink signal comprises signals of N frequency bands, and N is an integer greater than 1. The duplexer is configured to perform filtering processing on a main frequency uplink signal from the antenna to obtain a filtered main frequency uplink signal, and the main frequency uplink signal is a signal of a first main frequency band. The low noise amplifier is configured to perform amplification processing on the filtered uplink signal and the main frequency uplink signal to obtain an amplified filtered uplink signal and an amplified main frequency uplink signal. The radio frequency analog-to-digital converter is configured to convert the amplified filtered uplink signal and the amplified main frequency uplink signal into a first digital intermediate frequency signal. The digital intermediate frequency module is configured to process the first digital intermediate frequency signal. The digital intermediate frequency module is further configured to convert a baseband signal into a second digital intermediate frequency signal. The radio frequency analog-to-digital converter is further configured to convert the second digital intermediate frequency signal into a radio frequency signal. The power amplifier is configured to amplify the radio frequency signal to obtain an amplified radio frequency signal. The duplexer is configured to filter the amplified radio frequency signal to obtain a main frequency downlink signal, the main frequency downlink signal being a signal of a second main frequency band.

6. The radio unit of claim 5, wherein, The low noise amplifier includes any one of a wideband low noise amplifier and a set of adjustable gain amplifiers. The multiplexer includes N filters. Each adjustable gain amplifier in the set of adjustable gain amplifiers has a corresponding relationship with each filter in the N filters.

7. An antenna, characterized by The main frequency antenna and the multi-frequency antenna are included. The multi-frequency antenna is configured to receive an uplink signal in a downlink time slot, the uplink signal including signals of N frequency bands, N being an integer greater than 1. The multi-frequency antenna is further configured to receive the uplink signal in an uplink time slot. The main frequency antenna is configured to transmit a main frequency downlink signal in a downlink time slot, the main frequency downlink signal being a signal of a main frequency band.

8. The antenna according to claim 7, characterized in that The multi-frequency antenna includes N independent antenna units, the N independent antenna units corresponding to N antenna ports, and each of the N independent antenna units having a corresponding relationship with a signal of each frequency band in the uplink signal.

9. The antenna according to claim 7, characterized in that, The multi-frequency antenna includes a first antenna and a second antenna, the first antenna including one antenna unit, and the second antenna including (N-M) antenna units. The first antenna is configured to receive signals of M frequency bands in the N frequency bands, the signals of the M frequency bands corresponding to the same antenna port or the signals of the M frequency bands corresponding to M different antenna ports, M being an integer greater than or equal to 2. The second antenna is configured to receive signals of (N-M) frequency bands in the N frequency bands, the signals of the (N-M) frequency bands corresponding to (N-M) different antenna ports.

10. The antenna according to claim 7, wherein, The multi-frequency antenna includes a first antenna and a second antenna. The first antenna and the main frequency antenna correspond to the same antenna unit, and the first antenna is configured to receive signals of S frequency bands in the N frequency bands, the signals of the S frequency bands corresponding to the same antenna port or the signals of the S frequency bands corresponding to S different antenna ports, S being an integer greater than or equal to 1. The second antenna includes (N-S) antenna units, and the second antenna is configured to receive signals of (N-S) frequency bands in the N frequency bands, the signals of the (N-S) frequency bands corresponding to (N-S) different antenna ports.

11. A signal processing method, characterized by, The uplink signal from the antenna is filtered in a downlink time slot to obtain a filtered uplink signal, the uplink signal including signals of N frequency bands, N being an integer greater than 1. ​ amplify the filtered uplink signal to obtain an amplified filtered uplink signal; convert the amplified filtered uplink signal into a first digital intermediate frequency signal; process the first digital intermediate frequency signal.

12. The method of claim 11, wherein, The method further comprises: filter the main frequency uplink signal from the antenna and the uplink signal in the uplink time slot to obtain a filtered main frequency uplink signal and the filtered uplink signal, the main frequency uplink signal being a signal of a main frequency band; amplify the filtered main frequency uplink signal and the filtered uplink signal to obtain the amplified filtered main frequency uplink signal and the amplified filtered uplink signal; convert the amplified filtered main frequency uplink signal and the amplified filtered uplink signal into a second digital intermediate frequency signal; process the second digital intermediate frequency signal.

13. The method of claim 12, wherein, The filtering the uplink signal from the antenna in the downlink time slot comprises: filter a signal of a target frequency band in the uplink signal from the antenna in the downlink time slot to obtain a target uplink filtered signal; The method further comprises: amplify the target uplink filtered signal to obtain an amplified target uplink filtered signal; convert the amplified target uplink filtered signal into a third digital intermediate frequency signal; process the third digital intermediate frequency signal.

14. The method according to any one of claims 11-13, characterized in that, The method is applied in a radio frequency unit.

15. A communication system, characterized by The communication system comprises a radio frequency unit as claimed in any one of claims 1 to 6, and / or an antenna as claimed in any one of claims 7 to 10.

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