CN105338666B - Portable multiband base station equipment - Google Patents
Portable multiband base station equipment Download PDFInfo
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- CN105338666B CN105338666B CN201510804044.4A CN201510804044A CN105338666B CN 105338666 B CN105338666 B CN 105338666B CN 201510804044 A CN201510804044 A CN 201510804044A CN 105338666 B CN105338666 B CN 105338666B
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- signal
- radio frequency
- base station
- baseband
- band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
Abstract
The present invention relates to a kind of portable multiband base station equipments, including metal shell, Radio Frequency Subsystem board and baseband board.Radio Frequency Subsystem is emitted by external broad-band antenna and is received UL or DL signal, transmitting is isolated by circulator and receives signal, receiving path is made of wideband low noise amplifier, power splitter, band logical mode filter and front and back stages SPnT RF switch, signal will be received and send two-way transceiver to, transmitting path is connected to circulator by power amplifier.Two-way transceiver connects baseband by FMC interface, and radio frequency and baseband board card are encapsulated in a complete metal shell, and the FPGA of baseband is connect by PCI-E interface with user PC.Beneficial effect is the whole communication standards and frequency range that can support domestic all operators, has expanded application range of the portable base station equipment under external field environment significantly.It can also realize and more directly and easily apply by PCI-E interface directly and the integrated assembly of desktop computer or laptop.
Description
Technical field
The present invention relates to a kind of portable frequency range base station equipment, in particular to a kind of portable multiband base station equipment.
Background technique
Existing portable base station equipment currently on the market can only support the specific single frequency of some operator mostly
Section, this is mainly due to it to use duplexer (Duplexer) as the hinge of separation uplink/downlink signal, the band of duplexer itself
Width is relatively narrow, this becomes a hardware bottleneck for limiting existing portable base station.With domestic 4G LTE mobile communication network
Formal commercial, China's mobile communication frequency range becomes increasingly abundant, and wireless environment is also increasingly sophisticated.Existing portable base station equipment without
Method meets the live use demand of the engineers and technicians such as operator, the network optimization and network supervision, and existing portable base
Station equipment can only carry out the two-way communication of uplink/downlink with the mobile phone in cell, cannot receive other base stations in this cell simultaneously
Downlink signal can not carry out the complicated applications such as the monitoring of pseudo-base station.
Summary of the invention
In order to improve the bandwidth of operation of portable base station equipment, expand its application field, the present invention provides a kind of portable
Multiband base station equipment, can support the National Radio committee and Ministry of Industry and Information is China Mobile, China Unicom and China Telecom
Whole 2G/3G/4G LTE frequency ranges of three big operator's planning, can also receive the downlink signal of other base stations in cell simultaneously,
Specific technical solution is a kind of portable multiband base station equipment, including metal shell, Radio Frequency Subsystem and Base-Band Processing subsystem
System, Radio Frequency Subsystem and baseband are respectively individual boards, it is characterised in that: the Radio Frequency Subsystem, most before
End is external broad-band antenna, and external antenna is connect by RF cable with Radio Frequency Subsystem board, transmitting and received two phases
Opposite direction signal is isolated by circulator and is assigned on its respective radio frequency path, and receiving path first passes through broadband low noise
Acoustic amplifier amplification, wideband low noise amplifier control its gain, amplified letter by the ARM or FPGA of Base-Band Processing board
Number by a power splitter mean allocation at two receiving paths of RX1 and RX2, RX1 and RX2 receiving path is penetrated using prime SPnT
Frequency switch is distributed into n branch and receives sub-channel, and every receives the band logical mode filter for different frequency range of connecting on sub-channel, and n branch receives
Sub-channel selects the signal of one of frequency band to send two-way transceiver to through rear class SPnT RF switch again, and every grade of SPnT is penetrated
Frequency switch by Base-Band Processing board ARM or FPGA control the selection of its logic wherein a certain branch sub-channel carry out signal biography
Defeated, two-way transceiver connects baseband FPGA by FMC interface, and is encapsulated in a complete metal shell,
The FPGA of baseband is connect by PCI-E interface with user PC.
The sub-channel of the RX1 and RX2 access receives being divided into for frequency range, and RX1 access is mainly responsible for reception with the side FDD
The UL signal of the terminal transmission of formula work, while the UL/DL letter for the terminal and Base Transmitter that also receiving portion is worked in a manner of TDD
Number；RX2 access is mainly responsible for the DL signal of the reception Base Transmitter to work in a manner of FDD corresponding with RX1 access, while also connecing
Receive the UL/DL signal of terminal and Base Transmitter that another part is worked in a manner of TDD.
The beneficial effects of the invention are as follows the whole communication standards and frequency range that can support domestic all operators, expand significantly
Application range of the portable base station equipment under external field environment.It can also and desktop computer direct by PCI-E interface or pen
Remember the integrated assembly of this computer, realizes more direct and easily application.
Detailed description of the invention
Fig. 1 is system hardware architecture diagram of the invention.
Fig. 2 is ten frequency range division figure of RX1 access of the invention.
Fig. 3 is ten frequency range division figure of RX2 access of the invention.
Fig. 4 is the hardware architecture diagram of conventional portable base station equipment.
Fig. 5 is domestic three big operator's major mobile communication frequency range division tables.
Specific embodiment
It is described further below with reference to embodiment.
As shown in Figure 1, system is broadly divided into radio frequency and the big subsystem of Base-Band Processing two, baseband is by FPGA+
The modulation /demodulation and encoding and decoding of digital signal are completed in DSP collocation, and the control by ARM chip microcontroller to each unit in circuit should
Board is connected with PC machine mainboard by PCI-E high speed digital interface to realize the transmission of modulating/demodulating digital signal.Due to the portion
It is point consistent with the band processing system hardware structure of traditional base station equipment, it is not belonging to unique technology main points of the invention, therefore
This is not set forth in detail.The hardware structure of Radio Frequency Subsystem is the basic place for being different from traditional portable base station equipment, with
Under discuss in detail.
Radio Frequency Subsystem and baseband are respectively individual boards, and the two is connected by FMC interface, and is encapsulated in
In one complete metal shell.
The front end of Radio Frequency Subsystem is received using the external broad-band antenna of a 800MHz to 2.7GHz and transmitting is wireless
Signal, external antenna turn N-type radio frequency cable by SMA and connect with Radio Frequency Subsystem board.Two opposite directions of transmitting and reception
Signal be isolated by circulator and be assigned on its respective radio frequency path, circulator is customized product, work frequency
Rate range is 800MHz to 2.7GHz, and bandwidth 60MHz, isolation is 40dB or more.Receiving path first passes through wideband low noise
Amplifier (LNA) amplification, LNA control its gain by the ARM or FPGA of Base-Band Processing board, and adjustable gain range is 0dB
The ADL5523 of ADI company is used herein as to 20dB, stepping 0.5dB.Amplified signal passes through a power splitter mean allocation
At two receiving paths of RX1 and RX2, RX1 receiving path is mainly used for receiving with the terminal transmission of frequency division duplex mode work
Uplink (UL) signal and certain UL/DL signals with the terminal of time division duplex work and base station equipment transmitting.RX2
Receiving path is used to receive downlink (DL) signal of other base station equipment transmittings with frequency division duplex mode work in cell, with
And supplement receive RX1 access do not support some other with time division duplex work terminal and base station equipment emit
UL/DL signal.RX1 and RX2 receiving path is distributed into 10 reception sub-channels, every reception using prime SP10T RF switch
The filtering frequency of every sub-channel of the bandpass-type SAW filter (SAW) of series connection different frequency range on sub-channel, RX1 and RX2
The division of section is as shown in Figure 3 and Figure 4, and the frequency range division mode of these sub-channels is the object that this patent is laid special stress on protecting.10 connect
Receive sub-channel selects the signal of one of frequency band to send two-way transceiver to through rear class SP10T RF switch again
(Transceiver), every grade of SP10T RF switch by Base-Band Processing board ARM or FPGA control its logic and select it
In a certain branch sub-channel open and carry out signal transmission.
The core component of Radio Frequency Subsystem is the Transceiver chip of one piece of two-way transmitting-receiving, used here as ADI company
AD9361 RF transceiver, the working frequency of chip range are 70MHz to 6GHz, and bandwidth is 200kHz to 56MHz, pass through RX1
The reasonable frequencies segmentation of different sub-channels with RX2 access, can each mobile communication described in directly whole section of receptions table 1 frequently
Section.Such as the analog signal of the total 50MHz bandwidth of 2320MHz to 2370MHz of China Mobile TDD-LTE Band 40, passing through
Enter the port RX1 of AD9361 after the 9th sub-channel filtering of RX1 access.AD9361 is internally integrated up/down frequency converter, can will connect
Receive to obtain the intermediate-freuqncy signal that samples at suitable ADC of analog signal Direct Conversion.The port RX1 and RX2 of AD9361, can be same respectively
When receive base station DL signal and mobile phone UL signal；It can also be in the inscribed UL/DL letter for receiving time division duplex of a port
Number, then the clock synchronization module separating reducing controlled by FPGA is at UL and DL bit stream.TX1 is external as emission port
The wideband power amplifer (PA) of 800MHz to 2.7GHz forms transmitting path, is controlled by the ARM or FPGA of Base-Band Processing board
Transmitting gain processed realizes the transmitting of base station DL signal.
Main application scenarios have following several.
(1) by receiving the DL signal of fixed base stations transmitting in cell, whether normal its operating status is detected.
(2) if exception occurs in the fixed base station equipment in cell, the portable base station equipment can be used temporarily to replace solid
Fixed pattern base station equipment, for the communication with the mobile terminals such as mobile phone.
(3) it can search for and monitor the signal of the illegality equipments such as pseudo-base station transmitting.
The working principle of the portable base station equipment is introduced with three kinds of different modes below.
Formula communication is interacted with the terminal to work with frequency division duplex mode
Illustrate its course of work by taking 1 frequency range of China Unicom 3G WCDMA Band as an example.Certain terminal transmission one belongs to
The UL signal of some channel of the 1940MHz into 1955MHz frequency range, channel width 5MHz.Since there are other bases in cell
The noise signal of the various standards and each frequency range of station equipment and terminal transmission, so the signal will be mingled in a very broadband
Noise signal in.Antenna will receive all signals from 800MHz to 2.7GHz, include useful signal and noise signal, then
The broadband signal is transferred to circulator.Circulator, which directs it, is transferred to receiving path.It is transferred to function after LNA amplifies
Divide device.Power splitter uniformly assigns them to RX1 and RX2 access.The prime SP10T RF switch of RX2 is controlled by baseband system
It is in close state, the signal will be blocked in the transmission of RX2 access.The SP10T RF switch of RX1 access is controlled by baseband system
In 6 open state of channel.SAW filter range on 6th sub-channel is 1940MHz to 1955MHz, after its filtering, will be had
It is come out with signal extraction and is transferred to rear class SP10T RF switch.Rear class SP10T RF switch is controlled by baseband system in channel
Useful signal is transferred to the port RX1 of Transceiver by 6 open states.It completes to believe the radio frequency inside Transceiver
Number be further amplified/filter with after down coversion, through FMC interface be transferred to baseband FPGA and DSP complete letter
Number demodulation/decoding form useful data steam, then data are transferred to PC by PCI-E interface and are further processed.
The portable base station equipment opposite direction will belong to respective channels of the 2130MHz into 2145MHz frequency range simultaneously
DL signal is transmitted to terminal.The portable base station equipment is just completed with the terminal device in frequency division duplex mode and cell in this way
Interactive type communication.
Formula communication is interacted with the terminal to work with time division duplex
Illustrate its course of work by taking 39 frequency range of China Mobile 4G LTE Band as an example.Certain terminal transmission one
The UL signal of 1880MHz some channel into 1900MHz frequency range, channel width 10MHz.The signal will also be mingled in one very
In wide band noise signal.Antenna is to power splitter to the conditioning process of the broadband signal and conditioning process and " with frequency division pair
It is identical that the terminal that work mode works interacts formula communication.Power splitter uniformly assigns them to RX1 and RX2 access.Herein,
The prime SP10T RF switch of RX2 is controlled by baseband system to be in close state, and the signal will be blocked in the transmission of RX2 access.
The SP10T RF switch of RX1 access is controlled by baseband system in 7 open state of channel.SAW on 7th sub-channel filters model
Enclosing is 1880MHz to 1900MHz, after its filtering, useful signal is extracted and is transferred to rear class SP10T RF switch.Afterwards
Grade SP10T RF switch is controlled by baseband system in 7 open state of channel, and useful signal is transferred to Transceiver's
The port RX1.Complete inside Transceiver to the radiofrequency signal be further amplified/filter and down coversion after, through FMC interface
It is transferred to the FPGA of baseband, FPGA controls the letter that clock synchronization circuit extracts UL time slot in the signal first
Number, then the signal demodulate/decode forming useful data steam through FPGA and DSP, data are transferred to PC by PCI-E interface
It is further processed.
The portable base station equipment will belong to 1880MHz to 1900MHz frequency range under the control of clock synchronization circuit simultaneously
In respective channels DL signal, under the control of FPGA and clock synchronization circuit, in DL slot transmission to terminal.This is just in this way
The formula base station equipment of taking just completes interactive type communication with the terminal device in time division duplex and cell.
Receive the base station DL signal to work with frequency division or time division duplex
Illustrate its course of work by taking 6 frequency range of China Telecom 3G CDMA2000/1xEV-DO Band Class as an example.Certain is pseudo-
The Base Transmitter DL signal of one 2110MHz some channel into 2125MHz frequency range, channel width 5MHz.The signal will
It is mingled in a very wide band noise signal.Antenna is to power splitter to the conditioning process of the broadband signal and conditioning process
" it is identical that formula communication is interacted with the terminal that frequency division duplex mode works.Power splitter uniformly assigns them to RX1 and RX2
Access.The prime SP10T RF switch of RX1 is controlled by baseband system to be in close state, and the signal will be blocked in RX1 access
Transmission.The SP10T RF switch of RX2 access is controlled by baseband system in 5 open state of channel.SAW filter on 5th sub-channel
Wave range is 2110MHz to 2125MHz, after its filtering, useful signal is extracted and is transferred to rear class SP10T radio frequency and opens
It closes.Rear class SP10T RF switch is controlled by baseband system in 5 open state of channel, and useful signal is transferred to
The port RX2 of Transceiver.The down coversion to the radiofrequency signal is completed inside Transceiver and is further amplified/is filtered
Afterwards, demodulation/decoding that the FPGA and DSP for being transferred to baseband through FMC interface complete signal forms useful data steam,
Data PC is transferred to by PCI-E interface again to be further processed.
Claims (2)
1. a kind of portable multiband base station equipment, including metal shell, Radio Frequency Subsystem and baseband, radio frequency
System and baseband are respectively individual boards, it is characterised in that: the Radio Frequency Subsystem, front end are external width
Band antenna, external broad-band antenna are connect by RF cable with Radio Frequency Subsystem board, transmitting and received two opposite directions
Signal is isolated by circulator and is assigned on its respective radio frequency path, and receiving path first passes through wideband low noise amplification
Device amplification, wideband low noise amplifier control its gain by the ARM or FPGA of Base-Band Processing board, and amplified signal passes through
One power splitter mean allocation utilizes prime SPnT RF switch at two receiving paths of RX1 and RX2, RX1 and RX2 receiving path
It is distributed into n branch and receives sub-channel, every receives the band logical mode filter for different frequency range of connecting on sub-channel, and n branch receives sub-channel
The signal of one of frequency band is selected to send two-way transceiver, and every grade of SPnT RF switch to through rear class SPnT RF switch again
By on Base-Band Processing board ARM or FPGA control the selection of its logic wherein a certain branch sub-channel carry out signal transmission, two-way
Transceiver connects baseband FPGA by FMC interface, and is encapsulated in a complete metal shell, Base-Band Processing
The FPGA of subsystem is connect by PCI-E interface with user PC.
2. portable multiband base station equipment as described in claim 1, it is characterised in that: the son of the RX1 and RX2 access
Access receives being divided into for frequency range, and RX1 access is mainly responsible for the UL signal for receiving the terminal transmission to work in a manner of FDD, simultaneously
Also the UL/DL signal of receiving portion is worked in a manner of TDD terminal and Base Transmitter；RX2 access is mainly responsible for reception and RX1 is logical
The DL signal of the corresponding Base Transmitter to be worked in a manner of FDD in road, while also receiving the terminal that another part is worked in a manner of TDD
With the UL/DL signal of Base Transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510804044.4A CN105338666B (en) | 2015-11-20 | 2015-11-20 | Portable multiband base station equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510804044.4A CN105338666B (en) | 2015-11-20 | 2015-11-20 | Portable multiband base station equipment |
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| CN105338666A CN105338666A (en) | 2016-02-17 |
| CN105338666B true CN105338666B (en) | 2019-01-22 |
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| CN201510804044.4A Active CN105338666B (en) | 2015-11-20 | 2015-11-20 | Portable multiband base station equipment |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108702552B (en) * | 2016-02-19 | 2021-12-28 | 脸谱公司 | Modular base station |
| CN105897281A (en) * | 2016-05-06 | 2016-08-24 | 厦门市合佳兴电子有限公司 | Software-defined radio platform based on radio-frequency agile transceiver |
| CN106059618B (en) * | 2016-05-13 | 2018-10-19 | 湖南基石通信技术有限公司 | Signal transmit-receive method and device in a kind of radio frequency link |
| CN107070482A (en) * | 2017-02-09 | 2017-08-18 | 杭州柏乐尼通信设备有限公司 | The power amplification system of full operator full system type pictorial covering |
| CN107395218A (en) * | 2017-07-10 | 2017-11-24 | 西安电子科技大学 | R-T unit and design method based on FPGA and radio frequency agile transceiver |
| CN113285748B (en) * | 2021-04-07 | 2022-12-30 | 上海利正卫星应用技术有限公司 | Miniature radio frequency front-end device of satellite-borne communication system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101801122A (en) * | 2009-12-30 | 2010-08-11 | 华为技术有限公司 | Base-band signal processing device, method and multi-mode base station |
| JP2011182101A (en) * | 2010-02-26 | 2011-09-15 | Anritsu Corp | Base station evaluation device and received frequency control method thereof |
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2015
- 2015-11-20 CN CN201510804044.4A patent/CN105338666B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101801122A (en) * | 2009-12-30 | 2010-08-11 | 华为技术有限公司 | Base-band signal processing device, method and multi-mode base station |
| JP2011182101A (en) * | 2010-02-26 | 2011-09-15 | Anritsu Corp | Base station evaluation device and received frequency control method thereof |
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