CN112039554A - Terminal equipment and method for railway wireless communication - Google Patents
Terminal equipment and method for railway wireless communication Download PDFInfo
- Publication number
- CN112039554A CN112039554A CN202010775479.1A CN202010775479A CN112039554A CN 112039554 A CN112039554 A CN 112039554A CN 202010775479 A CN202010775479 A CN 202010775479A CN 112039554 A CN112039554 A CN 112039554A
- Authority
- CN
- China
- Prior art keywords
- power
- signal
- module
- circuit
- terminal device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
Abstract
The application relates to a terminal device and a method for railway wireless communication, wherein the terminal device comprises: the device comprises a 5G-R signal transceiver module, a power amplification circuit module, a duplex module and a receiving access module which are connected in sequence; the 5G-R signal transceiver module is used for transmitting a first 5G-R signal and receiving a second 5G-R signal; the power amplifying circuit is used for amplifying the output power of the power amplifying circuit; the duplex module is used for isolating the first 5G-R signal after power amplification from the second 5G-R signal after power amplification; the receiving access module is used for feeding the isolated second 5G-R signal back to the 5G-R signal transceiver module; by the method and the device, the problem of poor quality of railway wireless communication is solved, and railway wireless communication based on 5G-R is realized.
Description
Technical Field
The application relates to the technical field of wireless communication, in particular to terminal equipment and a method for railway wireless communication.
Background
A Railway wireless communication System (Global System for Mobile Communications-Railway, abbreviated as GSM-R) is a comprehensive special digital Mobile communication System specially designed for Railway communication, and is widely applied to various Railway lines; the high-speed railway communication spans 3G/4G from 2G GSM-R technology, and the 5G-quasi 5G-R technology is directly developed; compared with the GSM-R, the 5G-R has advantages in the aspects of frequency spectrum utilization rate, service rate, transmission delay and the like, and the evolution of the GSM-R to the 5G-R becomes necessary.
At present, the railway standard of 5G-R does not specify a specific frequency band, the preliminary intention is 2155 plus 2165MHz, and in terms of frequency spectrum characteristics, a high frequency spectrum has larger bandwidth, so that higher transmission flow can be provided to contribute to the improvement of the transmission rate; if the 5G-R operates in a high frequency spectrum, the requirement on the building density of the base stations is higher, because the high frequency spectrum has higher propagation loss and information receiving fading is serious, the distance between the 5G-R base stations is preliminarily evaluated to be less than 2 kilometers, but the number of the base stations is increased, the investment cost is increased rapidly due to too close distance, and the frequency between the base stations also needs to be switched frequently; if the distance between stations of the original GSM-R needs to be 3 kilometers, or the distance between stations of the 5G-R is extended to 6 kilometers in order to save investment cost, the transmitting power of the uplink communication equipment needs to be increased.
Under the current situation, 2155-2165MHz 5G-R modules come into force, however, in the related art, the 5G-R modules are all transmitting power of about 250mW or less, for the on-board modules, the power is small, because the power of the base station is much larger than that of the mobile phone, if the mobile phone is far away from the base station, the uplink signal of the mobile phone cannot be analyzed without enhancement, the uplink power of the 5G-R is low, the uplink and downlink coverage of the system are unbalanced, and especially in the case of a high-speed railway, single pass, poor quality, call drop and the like of the signal are caused.
Aiming at the problem of poor quality of railway wireless communication in the related art, no effective solution is provided at present.
Disclosure of Invention
The embodiment of the application provides terminal equipment and a method for railway wireless communication, and aims to at least solve the problem of poor quality of railway wireless communication in the related technology.
In a first aspect, an embodiment of the present application provides a terminal device for railway wireless communication, where the terminal device includes: the device comprises a 5G-R signal transceiver module, a power amplification circuit module, a duplex module and a receiving access module which are connected in sequence;
the 5G-R signal transceiver module is used for transmitting a first 5G-R signal and receiving a second 5G-R signal;
the power amplifying circuit is used for amplifying the output power of the power amplifying circuit;
the duplex module is used for isolating the first 5G-R signal after power amplification from the second 5G-R signal after power amplification;
and the receiving access module is used for feeding back the isolated second 5G-R signal to the 5G-R signal transceiver module.
In a possible embodiment, the terminal device further comprises a driving amplification circuit;
the driving amplification circuit is arranged between the 5G-R signal transceiver module and the power amplification circuit, and is used for amplifying the first 5G-R signal and the second 5G-R signal.
In a feasible embodiment, the power amplifying circuit comprises an amplifying link gain control unit, a power amplifying unit, a power coupling detection unit and a power analyzing unit which are connected in sequence;
the amplification link gain control unit is used for controlling the signal intensity of the first 5G-R signal and the second 5G-R signal so as to control the gain performance of the power amplification circuit;
the power amplification unit is used for amplifying the power of the first 5G-R signal and the power of the second 5G-R signal;
the power coupling detection unit is used for protecting the signal stability of the output end of the power amplification unit and coupling the detection power;
and the power analysis unit is used for sampling and analyzing the detection power, feeding back a control command to the amplification link gain control unit and further adjusting the gain of the power amplification circuit.
In one possible embodiment, the power amplifier unit includes a gallium nitride (GaN) power amplifier for amplifying the power of the first 5G-R signal and the power of the second 5G-R signal to a power level of 2W to 8W; and/or the presence of a gas in the gas,
the drive amplifying circuit is realized based on a CLASS DPD output module.
In one possible embodiment, the amplification chain gain control unit comprises an attenuator; wherein the attenuator is configured to adjust the strength of the first 5G-R signal and the second 5G-R signal.
In one possible embodiment, the duplex module comprises an isolator and a duplexer connected in sequence; wherein the isolator and the duplexer are configured to isolate the first 5G-R signal and the second 5G-R signal.
In one possible embodiment, the duplexer is configured as a 5G-R duplexer of a 2W to 8W power class.
In a possible embodiment, the terminal device performs railway wireless communication based on a 5G Time Division Duplex (TDD) system.
In one possible embodiment, the duplexing module is replaced with an antenna switching module; the terminal device further includes: the device comprises a gain control module, a temperature detection circuit, a power detection and analysis circuit and a voltage monitoring and alarming circuit;
the 5G-R signal transceiver module, the gain control module, the power amplification circuit module and the antenna switch module are sequentially connected; or, under the condition that the terminal device further includes a driving amplification circuit, the 5G-R signal transceiver module, the driving amplification circuit, the gain control module, the power amplification circuit module and the antenna switch module are sequentially connected;
the gain control module is used for amplifying the gain of the circuit; the antenna switch module is used for connecting or disconnecting the first 5G-R signal and connecting or disconnecting the second 5G-R signal;
the temperature detection circuit is connected with a control module, and the control module is connected and communicated with the 5G-R signal transceiver module; the temperature detection circuit is used for detecting the temperature of a circuit of the terminal equipment;
the power detection and analysis circuit is respectively connected with the control module and the antenna switch module and is used for detecting the power of the circuit;
the voltage monitoring and alarming circuit is respectively connected with the control module and the power amplification module, and is used for monitoring the voltage of the circuit and sending an alarming instruction when the voltage exceeds a preset threshold value.
In a second aspect, an embodiment of the present application provides a method for railway wireless communication, where the method is applied to a terminal device for railway wireless communication in the first aspect, and the method includes:
transmitting a first 5G-R signal and receiving a second 5G-R signal based on a 5G-R signal transceiver module, and amplifying the output power of a power amplifying circuit based on the power amplifying circuit;
isolating the first power-amplified 5G-R signal from the second power-amplified 5G-R signal based on a duplexing module;
feeding back the isolated second 5G-R signal to the 5G-R signal transceiver module based on a receiving path module;
the 5G-R signal transceiver module, the power amplification circuit module, the duplex module and the receiving access module are sequentially connected.
Compared with the related art, the embodiment of the application provides a terminal device and a method for railway wireless communication, wherein the terminal device comprises: the device comprises a 5G-R signal transceiver module, a power amplification circuit module, a duplex module and a receiving access module which are connected in sequence; the 5G-R signal transceiver module is used for transmitting a first 5G-R signal and receiving a second 5G-R signal; the power amplifying circuit is used for amplifying the output power of the power amplifying circuit; the duplex module is used for isolating the first 5G-R signal after power amplification from the second 5G-R signal after power amplification; the receiving access module is used for feeding the second isolated 5G-R signal back to the 5G-R signal transceiver module, so that the problem of poor quality of railway wireless communication is solved, and railway wireless communication based on 5G-R is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a railway wireless communication terminal device according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of another railway wireless communication terminal device according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a power amplification circuit according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an amplifier chain gain control circuit according to an embodiment of the present application;
fig. 5 is a schematic diagram of a power amplifier circuit and a power coupling detection circuit according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a duplexing module circuit according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a terminal device circuit according to an embodiment of the present application;
fig. 8 is a flowchart of a railway wireless communication method according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference herein to "a plurality" means greater than or equal to two. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
In this embodiment, a terminal device for railway wireless communication is provided, and fig. 1 is a schematic structural diagram of a terminal device for railway wireless communication according to an embodiment of the present application, as shown in fig. 1, the device includes: the device comprises a 5G-R signal transceiver module, a power amplification circuit module, a duplex module and a receiving access module which are connected in sequence;
the 5G-R signal transceiver module is used for transmitting a first 5G-R signal and receiving a second 5G-R signal; the 5G-R signal transceiver module mainly modulates and demodulates 5G-R signals, modulates the 5G-R IQ signals to a transmitting frequency band, and demodulates the 5G-R received signals into IQ signals;
the power amplifying circuit is used for amplifying the output power of the power amplifying circuit; it should be noted that, in the embodiment of the present application, the adopted 5G-R signal module has amplified the signal to 23dBm, so that a driving amplification circuit can be omitted, and a power amplification circuit is directly used, thereby saving the hardware structure cost;
the duplex module is used for isolating the first 5G-R signal after power amplification from the second 5G-R signal after power amplification so as to ensure that the transmitting and receiving can work normally at the same time; the duplex module comprises an isolator and a duplexer which are connected in sequence; wherein the isolator and the duplexer are used for isolating the first 5G-R signal and the second 5G-R signal; the duplexer can be set as a 2W/8W 5G-R duplexer; the receiving access module is used for feeding the isolated second 5G-R signal back to the 5G-R signal transceiver module.
In the related art, the 5G-R module usually has too small transmission power, resulting in poor signal quality, but in the present application, through the above-mentioned embodiment, the 5G-R signal transceiver module transmits and receives signals, the power of the circuit is amplified through the power amplification circuit, the transmitted signal and the received signal are isolated through the duplex module, and then the received signal is fed back to the 5G-R signal transceiver module through the receiving path module, thereby achieving the purpose of amplifying the uplink power of the 5G-R terminal device, solving the problem of poor quality of railway wireless communication, and realizing railway wireless communication based on 5G-R.
In a possible embodiment, a terminal device for railway wireless communication is provided, fig. 2 is a schematic structural diagram of another terminal device for railway wireless communication according to an embodiment of the present application, and as shown in fig. 2, the device further includes a driving amplifying circuit; the driving amplifying circuit is arranged between the 5G-R signal transceiver module and the power amplifying circuit and is used for carrying out proper amplification processing on the first 5G-R signal and the second 5G-R signal; the drive amplifying circuit can be realized based on a CLASS DPD output module; through the embodiment, the 5G-R signal has higher peak-to-average ratio, so that the driving amplification circuit is additionally arranged in the terminal equipment, the linearity of the next-stage amplification circuit can be ensured, and the accuracy of railway wireless communication is improved.
In a feasible embodiment, a power amplifying circuit of a terminal device is provided, fig. 3 is a schematic diagram of a power amplifying circuit according to an embodiment of the present application, and as shown in fig. 3, the power amplifying circuit includes an amplifying link gain control unit, a power amplifying unit, a power coupling detection unit, and a power analysis unit, which are connected in sequence;
the amplifying link gain control unit is used for controlling the signal intensity of the first 5G-R signal and the second 5G-R signal so as to control the gain performance of the power amplifying circuit; in one possible embodiment, fig. 4 is a schematic diagram of an amplification chain gain control circuit according to an embodiment of the present application, and as shown in fig. 4, the amplification chain gain control unit mainly includes an attenuator for adjusting the strength of the first 5G-R signal and the second 5G-R signal; wherein, the attenuation multiple of the attenuator can be controlled by a Serial Peripheral Interface (SPI for short); in the embodiment of the application, the attenuator and other parts are added in the design module of the terminal equipment, so that the harmonic performance is effectively inhibited;
the power amplification unit is used for amplifying the power of the first 5G-R signal and the power of the second 5G-R signal; the power amplifier circuit part belongs to a main amplifying part, the power amplifier unit comprises a GaN power amplifier, and the GaN power amplifier is used for amplifying the power of the first 5G-R signal and the power of the second 5G-R signal to 2W/8W or above;
the power coupling detection unit is used for protecting the signal stability of the output end of the power amplification unit and coupling detection power; the power analysis unit is used for sampling and analyzing the detection power, feeding back a control instruction to the amplification link gain control unit and further adjusting the gain of the power amplification circuit;
fig. 5 is a schematic diagram of a power amplifier circuit and a power coupling detection circuit according to an embodiment of the present application, and as shown in fig. 5, a power amplifier circuit part and a power coupling detection circuit part amplify a 5G-R signal to a power level of 2W/8W on the premise of ensuring good linearity performance; the coupling circuit is used for power detection, and is connected with a silicon-based radio frequency Laterally Diffused Metal Oxide Semiconductor (LDMOS) power transistor, and the LDMOS is used for improving radio frequency performance; in addition, a direct current bias is added in the circuit, so that signals can be deviated; in addition to the main operation modules in the above sections, the impedance matching elements between the modules play a crucial role in the whole rf link, and may even determine whether the terminal device in the embodiment of the present application can operate normally.
Through the embodiment, the amplifying link gain control unit, the power amplification unit, the power coupling detection unit and the power analysis unit which are sequentially connected are arranged in the power amplifying circuit, so that after the 5G-R signal is amplified by the preceding stage, the gain of the power amplifying circuit can be ensured to be accurately controlled and the power can be detected.
In a feasible embodiment, in order to amplify the 5G-R signal to 2W/8W or above, a 2W/8W 5G-R duplexer is adopted in the duplex module of the terminal device, or other duplexers with consistent or better performance can be adopted; there are, among others, three main problems in the application of duplex dies: the three problems of high gain, high linearity and high isolation all put forward high requirements on an amplifying device, and the high gain and the high linearity need to be met firstly, because the modulation modes of 5G and GSM are different, enough power back-off must be reserved to ensure enough peak-to-average power ratio; the power back-off of more than 10dBm to 15dBm is needed, and the good linearity can be kept only when the gain of the selected amplifier is about 20 dB;
fig. 6 is a schematic diagram of a circuit of a duplex module according to an embodiment of the present application, and as shown in fig. 6, the duplex module includes an isolator and a duplexer connected in sequence, so as to effectively isolate a transmission signal and a reception signal of the circuit; the duplexer in the duplex module circuit ensures the characteristics of large input dynamic range, high port isolation and the like, and can realize high-performance long-term operation under the condition of 2W/8W input.
In one possible embodiment, the terminal device employs non-signaling authentication and signaling authentication; wherein, the non-signaling verification test is carried out from 2155MHz to 2165MHz, and the signal source is used for generating an analog input signal, and the specific test data is as follows: when VGG is 4V and VDD is 12.5V, the test data is shown in table 1:
table 1 test data table one
When 2dBm is input, the output power of the duplexer is 34.3dBm, the power of a receiving end is-27.2 dBm, and the isolation degree is about 60 dB; after the whole system is built and verified, starting to perform TDD signaling test and using CMW500 to perform test; when VGG is 3.8V and VDD is 12.5V, the power supply current is about 500mA, the current at the VDD terminal is 1.6A, and the test data are shown in table 2:
TABLE 2 test data TABLE II
The above test data completely meet the expected target, especially when the power level reaches the state of 2W/8W, the linear indexes such as Spectrum Emission Mask (SEM), Adjacent Channel Leakage Ratio (ACLR) and the like are still at good level, and from the index of sensitivity, the isolation performance has good performance, so the feasibility of the application can be proved.
The method and the device have the advantages that the very remarkable performance is finally obtained, the effect is obvious in the aspect of 5G-R terminal power improvement, and the performance is improved; under the condition of increasing the signal from 200mW to 2W/8W, the linear indexes of adjacent channel leakage ratio, Error Vector Magnitude (EVM for short), SEM and the like still ensure good characteristics, and the limit requirement of maximum power in 3GPP 36521.1 is met. Meanwhile, the 2W/8W uplink power is more suitable for the application of long-distance and high-speed scenes such as railways. In the aspect of receiving performance, due to the adoption of the design of an isolator, a high-power duplexer and the like, the isolation performance of transmitting to receiving is well guaranteed, the sensitivity can reach-98 dBm under the bandwidth of 10MHz, and the requirement of 3GPP specification is completely met.
In the harmonic suppression, the amplification device itself generates harmonics due to nonlinear characteristics, in addition to amplifying the original harmonic signal, and thus the harmonic suppression is an important index of the amplification system. In the embodiment of the invention, the design module of the terminal equipment is added with parts such as an attenuator, an isolator and the like, so that the harmonic performance is effectively inhibited, and after the matching optimization of each link, the harmonic performance meets the requirement; therefore, the embodiment of the application achieves 2W/8W uplink power on the basis of 2W/8W 5G-R, and the performance after amplification meets the limitation requirement of 3GPP at the maximum power, so that the 5G-R terminal equipment can be better applied and developed.
In one possible embodiment, a terminal device for railway wireless communication is provided, wherein the embodiment of the application is mainly applied to a railway communication market; fig. 7 is a schematic diagram of a circuit of a terminal device according to an embodiment of the present application, as shown in fig. 7, the terminal device is used in the aspect of 5G TDD communication system; the terminal equipment replaces a duplex module with an antenna switch module, and also comprises a gain control module, a temperature detection circuit, a power detection analysis circuit and a voltage monitoring alarm circuit; the 5G-R signal transceiver module, the gain control module, the power amplification circuit module and the antenna switch module are connected in sequence; or, under the condition that the terminal device further includes a driving amplification circuit, the 5G-R signal transceiver module, the driving amplification circuit, the gain control module, the power amplification circuit module and the antenna switch module are connected in sequence;
the gain control module is used for amplifying the gain of the circuit; the antenna switch module is used for connecting or disconnecting the first 5G-R signal and connecting or disconnecting the second 5G-R signal; the selection of the antenna switch also needs to pay attention to the characteristics of input dynamic range, isolation, ESD, time delay and the like;
the temperature detection circuit is connected with a control module, and the control module is connected and communicated with the 5G-R signal transceiver module; wherein, the control module can be set as a singlechip; the temperature detection circuit is used for detecting the temperature of the circuit of the terminal equipment;
one end of the power detection and analysis circuit is connected with the control module, the other end of the power detection and analysis circuit is connected with the antenna switch module through a coupler, and the power detection and analysis circuit is used for detecting the power of the circuit; the voltage monitoring alarm circuit is respectively connected with the control module and the power amplification module, and is used for monitoring the voltage of the circuit and sending an alarm instruction when the voltage exceeds a preset threshold value; it should be noted that, compared with the above embodiments, the operation principle of the whole terminal device in this embodiment is not changed.
Through the embodiment, the duplex module is replaced by the antenna switch module, and the original analog duplex device is replaced by the electronic switch device through the change of the duplex mode, so that the control of the terminal equipment for railway wireless communication is more convenient and faster in the application process.
In a possible embodiment, a method for railway wireless communication is provided, and fig. 8 is a flowchart of a railway wireless communication method according to an embodiment of the present application, as shown in fig. 8, the flowchart includes the following steps:
step S802, transmitting a first 5G-R signal and receiving a second 5G-R signal based on a 5G-R signal transceiver module, and amplifying the output power of a power amplifying circuit based on the power amplifying circuit;
step S804, isolating the first 5G-R signal after power amplification and the second 5G-R signal after power amplification based on a duplex module;
step S806, based on the receiving path module, feeding back the isolated second 5G-R signal to the 5G-R signal transceiver module; the 5G-R signal transceiver module, the power amplification circuit module, the duplex module and the receiving access module are connected in sequence.
Through the steps from S802 to S806, signals are transmitted and received through the 5G-R signal transceiver module, the power of the circuit is amplified through the power amplifying circuit, the transmitted signals and the received signals are isolated through the duplex module, and then the received signals are fed back to the 5G-R signal transceiver module through the receiving access module, so that the purpose of amplifying the uplink power of the 5G-R terminal equipment is achieved, the problem of poor quality of railway wireless communication is solved, and the railway wireless communication based on 5G-R is realized.
It should be understood by those skilled in the art that various features of the above-described embodiments can be combined in any combination, and for the sake of brevity, all possible combinations of features in the above-described embodiments are not described in detail, but rather, all combinations of features which are not inconsistent with each other should be construed as being within the scope of the present disclosure.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. Terminal device for railway wireless communication, characterized in that the terminal device comprises: the device comprises a 5G-R signal transceiver module, a power amplification circuit module, a duplex module and a receiving access module which are connected in sequence;
the 5G-R signal transceiver module is used for transmitting a first 5G-R signal and receiving a second 5G-R signal;
the power amplifying circuit is used for amplifying the output power of the power amplifying circuit;
the duplex module is used for isolating the first 5G-R signal after power amplification from the second 5G-R signal after power amplification;
and the receiving access module is used for feeding back the isolated second 5G-R signal to the 5G-R signal transceiver module.
2. The terminal device according to claim 1, wherein the terminal device further comprises a drive amplification circuit;
the driving amplification circuit is arranged between the 5G-R signal transceiver module and the power amplification circuit, and is used for amplifying the first 5G-R signal and the second 5G-R signal.
3. The terminal device of claim 2, wherein the power amplifier circuit comprises an amplifier link gain control unit, a power amplifier unit, a power coupling detection unit and a power analysis unit, which are connected in sequence;
the amplification link gain control unit is used for controlling the signal intensity of the first 5G-R signal and the second 5G-R signal so as to control the gain performance of the power amplification circuit;
the power amplification unit is used for amplifying the power of the first 5G-R signal and the power of the second 5G-R signal;
the power coupling detection unit is used for protecting the signal stability of the output end of the power amplification unit and coupling the detection power;
and the power analysis unit is used for sampling and analyzing the detection power, feeding back a control command to the amplification link gain control unit and further adjusting the gain of the power amplification circuit.
4. The terminal device of claim 3, wherein the power amplifier unit comprises a GaN power amplifier for amplifying the power of the first 5G-R signal and the power of the second 5G-R signal to a power level of 2W to 8W; and/or the presence of a gas in the gas,
the driving amplification circuit is realized based on a CLASSDPD output module.
5. A terminal device according to claim 3, wherein the amplification link gain control unit comprises an attenuator; wherein the attenuator is configured to adjust the strength of the first 5G-R signal and the second 5G-R signal.
6. A terminal device according to claim 1 or 2, characterized in that the duplex module comprises an isolator and a duplexer connected in series; wherein the isolator and the duplexer are configured to isolate the first 5G-R signal and the second 5G-R signal.
7. A terminal device according to claim 6, characterized in that the diplexer is arranged as a 5G-R diplexer with a power class of 2W to 8W.
8. The terminal device according to claim 1 or 2, wherein the terminal device performs railway wireless communication based on a 5G time division duplex TDD scheme.
9. The terminal device of claim 8, wherein the duplexing module is replaced with an antenna switching module; the terminal device further includes: the device comprises a gain control module, a temperature detection circuit, a power detection and analysis circuit and a voltage monitoring and alarming circuit;
the 5G-R signal transceiver module, the gain control module, the power amplification circuit module and the antenna switch module are sequentially connected; or, under the condition that the terminal device further includes a driving amplification circuit, the 5G-R signal transceiver module, the driving amplification circuit, the gain control module, the power amplification circuit module and the antenna switch module are sequentially connected;
the gain control module is used for amplifying the gain of the circuit; the antenna switch module is used for connecting or disconnecting the first 5G-R signal and connecting or disconnecting the second 5G-R signal;
the temperature detection circuit is connected with a control module, and the control module is connected and communicated with the 5G-R signal transceiver module; the temperature detection circuit is used for detecting the temperature of a circuit of the terminal equipment;
the power detection and analysis circuit is respectively connected with the control module and the antenna switch module and is used for detecting the power of the circuit;
the voltage monitoring and alarming circuit is respectively connected with the control module and the power amplification module, and is used for monitoring the voltage of the circuit and sending an alarming instruction when the voltage exceeds a preset threshold value.
10. A method for railway wireless communication, wherein the method is applied to the terminal device of any one of claims 1 to 9, and the method comprises:
transmitting a first 5G-R signal and receiving a second 5G-R signal based on a 5G-R signal transceiver module, and amplifying the output power of a power amplifying circuit based on the power amplifying circuit;
isolating the first power-amplified 5G-R signal from the second power-amplified 5G-R signal based on a duplexing module;
feeding back the isolated second 5G-R signal to the 5G-R signal transceiver module based on a receiving path module;
the 5G-R signal transceiver module, the power amplification circuit module, the duplex module and the receiving access module are sequentially connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010775479.1A CN112039554A (en) | 2020-08-05 | 2020-08-05 | Terminal equipment and method for railway wireless communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010775479.1A CN112039554A (en) | 2020-08-05 | 2020-08-05 | Terminal equipment and method for railway wireless communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112039554A true CN112039554A (en) | 2020-12-04 |
Family
ID=73582351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010775479.1A Pending CN112039554A (en) | 2020-08-05 | 2020-08-05 | Terminal equipment and method for railway wireless communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112039554A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114665903A (en) * | 2020-12-23 | 2022-06-24 | 大唐移动通信设备有限公司 | Millimeter wave front end processing circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988897A (en) * | 2018-07-25 | 2018-12-11 | 深圳市桑达无线通讯技术有限公司 | A kind of railway LTE-R radio communication terminal |
| CN110518943A (en) * | 2019-08-02 | 2019-11-29 | 北京交通大学 | Extensive antenna channel detection method based on wave beam tracking under high-speed mobile scene |
-
2020
- 2020-08-05 CN CN202010775479.1A patent/CN112039554A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988897A (en) * | 2018-07-25 | 2018-12-11 | 深圳市桑达无线通讯技术有限公司 | A kind of railway LTE-R radio communication terminal |
| CN110518943A (en) * | 2019-08-02 | 2019-11-29 | 北京交通大学 | Extensive antenna channel detection method based on wave beam tracking under high-speed mobile scene |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114665903A (en) * | 2020-12-23 | 2022-06-24 | 大唐移动通信设备有限公司 | Millimeter wave front end processing circuit |
| WO2022134835A1 (en) * | 2020-12-23 | 2022-06-30 | 大唐移动通信设备有限公司 | Millimeter wave front-end processing circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2775781B1 (en) | Mobile communication terminal | |
| CN102461007B (en) | Method for transmission/reception timing of control base station antenna and the antenna for base station using this method | |
| US6122488A (en) | Method and apparatus for increasing an output impedance of a transmit amplifier during receive mode of a two-way communication unit | |
| US7873330B2 (en) | Transceiver for reducing current consumption in a wireless communications network | |
| US9071975B2 (en) | Radio-frequency power amplifier circuitry with linearity optimization capabilities | |
| US20180302047A1 (en) | Power amplifier module and radio frequency module | |
| EP2846602A1 (en) | Mobile communication terminal | |
| WO2020155872A1 (en) | Inter-band uplink carrier aggregation radio frequency circuit, antenna apparatus, and electronic device | |
| CN109743063A (en) | A kind of baseband processing unit, wireless communication system and equipment based on FPGA | |
| CN100574479C (en) | A kind of antenna feeder sharing method and system | |
| CN108988897B (en) | Railway LTE-R wireless communication terminal equipment | |
| CN112039554A (en) | Terminal equipment and method for railway wireless communication | |
| CN201639582U (en) | Repeater solving mobile object coverage | |
| CN112491434A (en) | Radio frequency front-end circuit, radio frequency signal receiving method, communication method and communication equipment | |
| CN101742631B (en) | Repeater for solving covering of moving body and control method thereof | |
| CN103079292A (en) | High-performance radio frequency channel for TDD LTE (time division duplexing long term evolution) tower mounted amplifier | |
| CN109861717A (en) | A kind of wireless communication signals processing system and method based on FPGA | |
| US11870538B2 (en) | Amplifier networks in a repeater | |
| CN110545114B (en) | Railway wireless communication terminal based on LTE-R | |
| CN100349389C (en) | Communication signal bidirection amplifier | |
| CN217693260U (en) | Radio frequency power amplifier | |
| CN215871424U (en) | Optical fiber radio frequency signal zooming device | |
| Balteanu et al. | Enabling RF Circuit Techniques for 5G and beyond | |
| US20240048172A1 (en) | Signal communication terminal and signal communication system | |
| CN111654307B (en) | Radio frequency front end protection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201204 |