WO2016109949A1

WO2016109949A1 - Radio frequency front-end system, terminal device and base station

Info

Publication number: WO2016109949A1
Application number: PCT/CN2015/070274
Authority: WO
Inventors: 石小红; 徐佳; 车翔; 王立杰
Original assignee: 华为技术有限公司
Priority date: 2015-01-07
Filing date: 2015-01-07
Publication date: 2016-07-14
Also published as: CN105940760B; CN105940760A

Abstract

Provided are a radio frequency front-end system, a terminal device and a base station. The radio frequency front-end system comprises: a main card RFIC, a secondary card RFIC, a first and a second switching switch, a single-pole N-throw switch, a multi-mode antenna and a multi-mode multi-band power amplifier (MMPA), wherein N is a positive integer not less than 5; the MMPA contains a GSM-PA; by means of controlling the switching of the first switching switch and the second switching switch, the secondary card RFIC or the main card RFIC is selectively used to transmit GSM low-frequency and high-frequency signals using the GSM-PA in the MMPA; and the low-frequency and high-frequency output ends of the GSM-PA are correspondingly connected to two fixed ends of the single-pole N-throw switch, and a movable end of the single-pole N-throw switch is connected to the multi-mode antenna for gating a signal channel between the MMPA and the multi-mode antenna. The present invention can solve the problems of relatively high costs and a tight PCB layout.

Description

RF front-end systems, terminal equipment and base stations

Technical field

Embodiments of the present invention relate to the field of integrated circuit design, and in particular, to a radio frequency front end system, a terminal device, and a base station.

Background technique

At present, with the continuous development of the fourth generation of mobile phone mobile communications standards (abbreviation: 4G), more and more terminal devices and base stations can support multiple communication systems for communication. Among them, a plurality of communication systems may include: Time Division Duplexing Long Term Evolution (English: Time Division Duplexing Long Term Evolution, abbreviation: TDD-LTE), Frequency Division Duplexing Long Term Evolution (abbreviation: FDD) -LTE), Global System for Mobile Communication (GSM), Time Division-Synchronous Code Division Multiple Access (English: Time Division-Synchronous Code Division Multiple Access, TD-SCDMA) and Wideband Code Division Multiple access (English: Wideband Code Division Multiple Access, abbreviation: WCDMA). Currently, 4G terminals use the Voice Switched Fallback (English: Circuit Switched Fallback, abbreviated: CSFB) scheme. The terminals using the CSFB scheme have poor quality during voice calls and cannot use the LTE standard network during a call. In order to solve such problems, a voice and data concurrency (English: Simultaneous GSM and LTE, abbreviation: SG-LTE) scheme is proposed, that is, voice is transmitted using GSM system, and data is used in TD-SCDMA, WCDMA, TDD-LTE or FDD-LTE system transmission.

In the existing SG-LTE technical solution, as shown in FIG. 1 , for the RF front-end system, the main components are: two radio frequency integrated circuits (English: Radio Frequency Integrated Circuit, abbreviation: RFIC), that is, in FIG. The main card RFIC1 and the secondary card RFIC2, a multi-mode multi-band power amplifier (English: Multi-mode Multi-band Power Amplifier, abbreviation: MMPA) is PA2 in Figure 1, a power amplifier with a switch is PA1 in Figure 1, Two single-pole and twelve-throw switches are two SP12Ts in Figure 1, one single-pole six-throw switch, namely SP6T in Figure 1, two main card multimode antennas and one secondary card antenna.

The existing technical solutions have the following problems: the cost is relatively high: two PAs are required; the printed circuit board (English: Printed Circuit Board, abbreviated: PCB) has a tight layout: the use of two PAs increases the PCB layout pressure, and the secondary card antenna Larger size, taking up more PCB space and space in the device.

Summary of the invention

The radio frequency front-end system, the terminal device and the base station provided by the embodiments of the present invention can solve the problems of high cost and tight PCB layout.

In a first aspect, the radio frequency front-end system provided by the embodiment of the present invention includes: a main card radio frequency integrated circuit chip RFIC, a sub-card radio frequency integrated circuit chip RFIC, a first switch, a second switch, and a single-pole N-throw switch, and N is not a positive integer less than 5, a multimode antenna for transmitting and receiving multimode radio frequency signals, a multimode multiband power amplifier MMPA, and the MMPA includes a power amplifier GSM-PA for the global mobile communication system GSM;

Wherein the first switch is coupled to a transmitting end of the secondary card RFIC for transmitting a GSM low frequency signal, a transmitting end of the primary card RFIC for transmitting a GSM low frequency signal, and a low frequency signal of the GSM-PA Inputting, by controlling switching of the first switching switch, selectively coupling a transmitting end of the secondary card RFIC for transmitting a GSM low frequency signal or a transmitting end of the primary card RFIC for transmitting a GSM low frequency signal To the low frequency signal input end of the GSM-PA;

The second switching switch is coupled to a transmitting end of the secondary card RFIC for transmitting a GSM high frequency signal, a transmitting end of the primary card RFIC for transmitting a GSM high frequency signal, and a high frequency of the GSM-PA a signal input end selectively controlling a transmitting end of the secondary card RFIC for transmitting a GSM high frequency signal or the primary card RFIC for transmitting a GSM high frequency signal by controlling switching of the second switching switch a transmitting end coupled to the high frequency signal input end of the GSM-PA;

The low frequency signal output end and the high frequency signal output end of the GSM-PA are connected to two of the N non-moving ends of the single-pole N-throw switch, and the movable end of the single-pole N-throw switch and the multi-mode antenna Connected to strobe a signal path between the MMPA and the multimode antenna.

With reference to the first aspect, in a first possible implementation, a receiving end of the secondary card RFIC for receiving a signal of a GSM first preset frequency band, and a secondary card RFIC for receiving a GSM second preset The receiving end of the signal of the frequency band and the receiving end of the signal for receiving the GSM third preset frequency band in the secondary card RFIC respectively pass the respective corresponding band filter and the single-pole N-throw switch Any three fixed ends are connected, and the band filter is used to pass the received signal conforming to its own frequency band and shield the signals received in other frequency bands.

In conjunction with the first aspect, in a second possible implementation, the first switch and the second switch are both single-pole and double-throw switches.

In combination with the first aspect, in a third possible implementation manner, the frequency bands supported by the MMPA include:

Time division duplex long-term evolution TDD-LTE standard frequency band, frequency division duplex long-term evolution FDD-LTE standard frequency band, wideband code division multiple access WCDMA standard frequency band, and at least one of time division synchronous code division multiple access TD-SCDMA standard frequency band and GSM Standard frequency band.

In conjunction with the first possible implementation of the first aspect, in a fourth possible implementation, the GSM first preset frequency band is a GSM900 MHz frequency band, and the GSM second preset frequency band is a GSM 1800 MHz frequency band, the GSM The third preset frequency band is the GSM1900MHz frequency band.

In a second aspect, the terminal device provided by the embodiment of the present invention includes the radio frequency front end system and the logic control chip corresponding to any possible implementation manner of the first aspect, wherein the control end of the single-pole N-throw switch and the radio frequency front end The logic control chips outside the device are connected.

In conjunction with the second aspect, in a first possible implementation, the logic control chip includes a processor CPU.

In a third aspect, the base station provided by the embodiment of the present invention includes the radio frequency front end system and the logic control chip corresponding to any possible implementation manner of the first aspect, wherein the control end of the single-pole N-throw switch and the radio frequency front-end device The logic control chips outside are connected.

In conjunction with the third aspect, in a first possible implementation, the logic control chip includes a processor CPU.

The radio frequency front-end system, the terminal device and the base station provided by the embodiment of the invention include: a main card RFIC, a sub-card RFIC, first and second switch switches, a single-pole N-throw switch, N is a positive integer not less than 5, and a multi-mode antenna And multi-mode multi-band power amplifier MMPA, MMPA includes GSM-PA; wherein, by controlling the switching of the first switching switch and the second switching switch, the secondary card RFIC or the primary card RFIC is selectively utilized by the GSM-PA in the MMPA To transmit GSM low frequency and high frequency signals; the low frequency and high frequency output terminals of GSM-PA are connected to the two fixed ends of the single-pole N-throw switch, and the single-pole N-throw switch is connected to the multi-mode antenna for gating Signal path between MMPA and multimode antenna. The invention can solve the problems of high cost and tight PCB layout. Compared to the prior art, on the PCB By reducing one PA and the secondary card antenna, the present invention can solve the problem of high cost and tight PCB layout.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic structural diagram of a conventional SG-LTE solution;

2 is a schematic structural diagram of a radio frequency front end system according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to enable a person skilled in the art to more clearly understand the technical solutions provided by the embodiments of the present invention, before the technical solutions provided by the embodiments of the present invention are introduced, the structure diagram of the existing SG-LTE solution shown in FIG. 1 is first performed. Detailed introduction.

It should be noted that TX in Figure 1 indicates reception, RX indicates transmission, TRX indicates transmission/reception, DP4T is double-pole four-throw switch, DP6T is double-pole and six-throw switch, SP2T indicates single-pole double-throw switch, and SP12T indicates single-pole twelve-throw switch. Toss a switch, Band is abbreviated as B. For example, B7 represents Band7, and the logic control chip can be a CPU. In addition, only one band filter is marked in FIG. 1. To simplify the marking, the remaining band filters are not marked.

The structure shown in FIG. 1 may be implemented in a terminal device or implemented in a base station, where the terminal device or the base station including the structure can simultaneously support TDD-LTE, FDD-LTE, and TD-SCDMA. , WCDMA, GSM five communication modes, support TDD-LTE Band38/39/40, TD-SCDMA Band 34/39/41, WCDMA Band 1/2/5, FDD-LTE Band 1/3/7 and GSM Band 2/3/5/8 and other dozens of frequency bands.

As shown in Figure 1, the frequency band used by the primary card RFIC is divided into three parts: the WCDMA/GSM part of the primary card, the TD-SCDMA/LTE main set part of the primary card, and the LTE diversity part of the primary card. The WCDMA/GSM part of the main card, including WCDMA Band1/2/5, GSM Band2/3/8 six bands; the main card TD-SCDMA/LTE main set part, including TDD-LTE Band38/39/40, FDD- LTE Band7, TD-SCDMA Band34/39 five frequency bands; main card LTE diversity part, including TDD-LTE Band38/39/40, FDD-LTE Band3/7 five frequency bands. The frequency band used by the secondary card RFIC is GSM Band3/8.

For the radio frequency front end portion of the transmit and receive channels of the secondary card GSM in FIG. 1 : the secondary card RFIC transmits the low frequency signal and the high frequency signal of the GSM from the transmit ports TX-LB and TX-HB, respectively, and the GSM low frequency signal and the high frequency signal respectively Entering the low frequency input terminal GSM-LB of the secondary card PA1 and the high frequency input terminal GSM-HB, the GSM low frequency signal and the high frequency signal are amplified by the PA1 power, and then reach the secondary card antenna via the switch in the PA1, and the secondary card antenna will be The signal is transmitted; correspondingly, the GSM signal received by the secondary card antenna passes through the switch in PA1, filters out the out-of-band signal through the corresponding band filter, and then enters the secondary card RFIC. It can be seen from Fig. 1 that the channel for transmitting and receiving the GSM signal by the secondary card RFIC is independent of the channel for transmitting and receiving the GSM signal by the primary card RFIC, and the primary card RFIC and the secondary card RFIC use PA2 (MMPA) and PA1, respectively. . It is worth mentioning that the switch in PA1 can also realize the signals of the five sub-bands of the shared card antenna receiving part of the main card LTE diversity part TDD-LTE Band38/39/40 and FDD-LTE Band3/7.

The radio frequency front-end system provided by the embodiment of the present invention is described in detail below by way of a specific embodiment. For example, the single-pole twelve-throw switch SP12T is selected as a single-pole N-throw switch, and the single-pole double-throw switch SP2T-1 and SP2T-2 are respectively performed. As the first switch and the second switch, as shown in FIG. 2, the RF front-end system includes:

Main card RFIC, sub-card RFIC, SP2T-1, SP2T-2, SP12T, multi-mode antenna for transmitting and receiving multi-mode radio frequency signals and multi-mode multi-band power amplifier MMPA, MMPA includes power amplifier for GSM GSM- PA;

Wherein, SP2T-1 is coupled to the transmitting end of the secondary card RFIC for transmitting the GSM low frequency signal, the transmitting end of the primary card RFIC for transmitting the GSM low frequency signal, and the low frequency signal input end of the GSM-PA, by controlling the SP2T-1 Switching, selectively enabling the secondary card RFIC to be used to transmit GSM low frequencies The transmitting end of the signal or the transmitting end of the main card RFIC for transmitting the GSM low frequency signal is coupled to the low frequency signal input end of the GSM-PA;

SP2T-2 is coupled to the transmitting end of the secondary card RFIC for transmitting GSM high-frequency signals, the transmitting end of the main card RFIC for transmitting GSM high-frequency signals, and the high-frequency signal input terminal of GSM-PA, by controlling SP2T-2 Switching, selectively enabling the transmitting end of the secondary card RFIC for transmitting the GSM high frequency signal or the transmitting end of the primary card RFIC for transmitting the GSM high frequency signal to be coupled to the high frequency signal input end of the GSM-PA;

The low frequency signal output end and the high frequency signal output end of the GSM-PA are connected to the two fixed ends of the SP12T, and the mobile end of the SP12T is connected to the multimode antenna for gating the signal path between the MMPA and the multimode antenna.

It should be noted that, in Figure 2, TX indicates reception, RX indicates transmission, TRX indicates reception/transmission, DP4T is double-pole and four-throw switch, DP6T is double-pole and six-throw switch, SP2T indicates single-pole double-throw switch, and SP12T indicates single-pole and twelve-throw switch. Toss a switch, Band is abbreviated as B. For example, B7 represents Band7, and the logic control chip can be a CPU. In addition, only one band filter is marked in FIG. 2. To simplify the marking, the remaining band filters are not marked.

Optionally, as shown in FIG. 2, the receiving end of the signal for receiving the first preset frequency band of the GSM in the secondary card RFIC, the receiving end of the signal for receiving the second preset frequency band of the GSM in the secondary card RFIC, and the secondary card The receiving end of the signal for receiving the GSM third preset frequency band in the RFIC is respectively connected to the fixed terminals TRX9, TRX10, and TRX11 of the SP12T through respective corresponding band filters, and the band filter is used to pass the received signal conforming to the own frequency band. And shielding signals received by other frequency bands, wherein the first preset frequency band of GSM is GSM900MHz frequency band, the second preset frequency band of GSM is GSM1800MHz frequency band, and the third preset frequency band of GSM is GSM1900MHz frequency band.

Optionally, the frequency bands supported by MMPA include:

Exemplarily, as shown in FIG. 2, the frequency bands supported by MMPA include: WCDMA Band1/2/5 and GSM Band2/3.

For the radio frequency front end portion of the transmit and receive channels of the secondary card GSM in FIG. 2: the RFIC transmits the low frequency signal and the high frequency signal of the GSM from the transmit ports TX-LB and TX-HB, respectively, the GSM low The frequency signal and the high-frequency signal respectively enter the main card GSM PA for power amplification through SP2T-1 and SP2T-1, and then are transmitted by the multimode antenna through TRX6 and TRX5 in SP12T; correspondingly, the GSM received by the multimode antenna The signal, after TRX9, TRX10 and TRX11 in the SP12T, filters out the out-of-band signal through the corresponding band filter and enters the secondary card RFIC. It can be seen from Fig. 1 that the channel for transmitting and receiving the GSM signal by the secondary card RFIC and the channel for transmitting and receiving the GSM signal by the primary card RFIC are shared by the GSM-PA in the MMPA, by controlling the switching of the SP2T-1 and the SP2T-2, Switching between the primary card RFIC transmitting and receiving GSM signals and the secondary card RFIC transmitting and receiving GSM signals can be achieved.

The radio frequency front-end system provided by the embodiment of the invention includes: a main card RFIC, a sub-card RFIC, a first and a second switch, a single-pole N-throw switch, N is a positive integer not less than 5, a multi-mode antenna and a multi-mode multi-band The power amplifier MMPA, MMPA includes GSM-PA; wherein, by controlling the switching of the first switching switch and the second switching switch, the secondary card RFIC or the primary card RFIC is selectively enabled to transmit the GSM low frequency using the GSM-PA in the MMPA. High-frequency signal; the low-frequency and high-frequency outputs of GSM-PA are connected to the two fixed ends of the single-pole N-throw switch. The single-pole N-throw switch is connected to the multi-mode antenna for gating MMPA and multimode antennas. The signal path between. The invention can solve the problems of high cost and tight PCB layout. Compared with the prior art, reducing one PA and the secondary card antenna on the PCB, the present invention can solve the problem of high cost and tight PCB layout.

An embodiment of the present invention provides a terminal device. As shown in FIG. 3, the terminal device includes a radio frequency front end system and a logic control chip as shown in FIG. 2, wherein a single-knife N-throw switch and a logic control chip other than the RF front-end device are provided. Connected, exemplary, as shown in FIG. 3, the single-pole N-throw switch may be SP12T, and the logic control chip may be a processor CPU.

It should be noted that, in FIG. 3, TX indicates reception, RX indicates transmission, TRX indicates reception/transmission, DP4T is double-pole and four-throw switch, DP6T is double-pole and six-throw switch, SP2T indicates single-pole double-throw switch, and SP12T indicates single-pole twelve-throw switch. To throw a switch, Band is abbreviated as B. For example, B7 represents Band7, and the logic control chip can be a CPU. In addition, only one band filter is marked in FIG. 3. To simplify the marking, the remaining band filters are not marked.

According to the terminal device provided by the embodiment of the present invention, in the radio frequency front end system of the terminal device, the secondary card RFIC and the primary card RFIC transmit the GSM low frequency signal and the high by controlling the two switches to share a GSM-PA and a multimode antenna in the MMPA. Frequency signal, compared with the prior art, reducing one PA and the secondary card antenna on the PCB, the invention can solve the problem of high cost and tight PCB layout question.

The embodiment of the present invention provides a base station. As shown in FIG. 4, the base station includes a radio frequency front end system and a logic control chip as shown in FIG. 2, wherein the single-pole N-throw switch is connected to a logic control chip other than the RF front-end device. Illustratively, as shown in FIG. 4, the single-pole N-throw switch may be SP12T, and the logic control chip may be a processor CPU.

It should be noted that, in FIG. 4, TX indicates reception, RX indicates transmission, TRX indicates reception/transmission, DP4T is double-pole and four-throw switch, DP6T is double-pole and six-throw switch, SP2T indicates single-pole double-throw switch, and SP12T indicates single-pole twelve-throw switch. Toss a switch, Band is abbreviated as B. For example, B7 represents Band7, and the logic control chip can be a CPU. In addition, only one band filter is marked in FIG. 4, and the remaining band filters are not marked to simplify the labeling.

According to the base station provided by the embodiment of the present invention, in the radio frequency front end system of the base station, the secondary card RFIC and the primary card RFIC transmit the GSM low frequency signal and the high frequency signal by controlling the two switching switches to share a GSM-PA and a multimode antenna in the MMPA. Compared with the prior art, reducing one PA and the secondary card antenna on the PCB, the present invention can solve the problem of high cost and tight PCB layout.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above integrated unit implemented in the form of a software functional unit can be stored in a calculation The machine can be read from the storage medium. The above software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present invention. Part of the steps. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

A person skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed, that is, the device is installed. The internal structure is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the device described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

An RF front-end system, comprising: a main card radio frequency integrated circuit chip RFIC, a sub-card radio frequency integrated circuit chip RFIC, a first switch, a second switch, a single-pole N-throw switch, and N is not less than 5 An integer, a multimode antenna for transmitting and receiving multimode radio frequency signals, and a multimode multiband power amplifier MMPA, wherein the MMPA includes a power amplifier GSM-PA for the global mobile communication system GSM;

Wherein the first switch is coupled to a transmitting end of the secondary card RFIC for transmitting a GSM low frequency signal, a transmitting end of the primary card RFIC for transmitting a GSM low frequency signal, and a low frequency signal of the GSM-PA Inputting, by controlling switching of the first switching switch, selectively coupling a transmitting end of the secondary card RFIC for transmitting a GSM low frequency signal or a transmitting end of the primary card RFIC for transmitting a GSM low frequency signal To the low frequency signal input end of the GSM-PA;

The second switching switch is coupled to a transmitting end of the secondary card RFIC for transmitting a GSM high frequency signal, a transmitting end of the primary card RFIC for transmitting a GSM high frequency signal, and a high frequency of the GSM-PA a signal input end selectively controlling a transmitting end of the secondary card RFIC for transmitting a GSM high frequency signal or the primary card RFIC for transmitting a GSM high frequency signal by controlling switching of the second switching switch a transmitting end coupled to the high frequency signal input end of the GSM-PA;

The low frequency signal output end and the high frequency signal output end of the GSM-PA are connected to two of the N non-moving ends of the single-pole N-throw switch, and the movable end of the single-pole N-throw switch and the multi-mode antenna Connected to strobe a signal path between the MMPA and the multimode antenna.
The system according to claim 1, wherein a receiving end of the secondary card RFIC for receiving a signal of a GSM first preset frequency band, and a secondary card RFIC for receiving a second preset frequency band of the GSM are used. The receiving end of the signal and the receiving end of the signal for receiving the GSM third preset frequency band in the secondary card RFIC are respectively connected to any remaining three fixed ends of the single-pole N-throw switch through respective corresponding band filters, The band filter is used to pass and block signals received in other frequency bands for signals that are received in accordance with its own frequency band.
The system of claim 1 wherein said first changeover switch and said second changeover switch are both single pole double throw switches.
The system of claim 1 wherein the frequency bands supported by the MMPA comprise:

Time division duplex long-term evolution TDD-LTE standard frequency band, frequency division duplex long-term evolution FDD-LTE standard At least one of the quasi-band and the time division synchronous code division multiple access TD-SCDMA standard frequency band and the GSM standard frequency band.
The system according to claim 2, wherein the GSM first preset frequency band is a GSM900 MHz frequency band, the GSM second predetermined frequency band is a GSM 1800 MHz frequency band, and the GSM third predetermined frequency band is a GSM 1900 MHz frequency band.
A terminal device, comprising the radio frequency front end system and the logic control chip according to any one of claims 1-5, wherein a control end of the single-pole N-throw switch and a logic other than the radio frequency front-end device The control chip is connected.
The terminal device according to claim 6, wherein the logic control chip comprises a processor CPU.
A base station, comprising the radio frequency front end system and the logic control chip according to any one of claims 1-5, wherein a control end of the single-pole N-throw switch and logic control outside the radio frequency front-end device The chips are connected.
The base station according to claim 8, wherein said logic control chip comprises a processor CPU.