CN110311724A - A kind of digital front-end based on software definition, physical layer architecture and terminal - Google Patents
A kind of digital front-end based on software definition, physical layer architecture and terminal Download PDFInfo
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- CN110311724A CN110311724A CN201910569470.2A CN201910569470A CN110311724A CN 110311724 A CN110311724 A CN 110311724A CN 201910569470 A CN201910569470 A CN 201910569470A CN 110311724 A CN110311724 A CN 110311724A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
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Abstract
The embodiment of the invention discloses a kind of digital front-end based on software definition, physical layer architecture and terminals, wherein digital front-end includes: satellite communication front-end circuit, land communication front-end circuit and baseband processing circuitry；Satellite communication front-end circuit and land communication front-end circuit are connected with baseband processing circuitry respectively；Satellite communication front-end circuit, for baseband processing circuitry will to be sent to by the received satellite-signal of antenna after front-end processing；Alternatively, antenna will be sent to by the received satellite baseband signal of baseband processing circuitry after front-end processing；Land communication front-end circuit, for baseband processing circuitry will to be sent to by the received land signal of antenna after front-end processing；Alternatively, antenna will be sent to by the received land baseband signal of baseband processing circuitry after front-end processing.The technical solution of the embodiment of the present invention realizes the free switching of satellite communication system and terrestrial communications systems, improves the popularity rate and utilization rate of simple function chip.
Description
Technical field
The present embodiments relate to wireless communication technique more particularly to a kind of digital front-ends based on software definition, physics
Layer structure and terminal.
Background technique
With the raising that the mankind require radio communication quality, satellite communication big, high reliablity, open-minded with its communication range
Circuit is grown rapidly rapidly and the advantages that can realizing multiple access communication.
In the prior art, in order to improve the information handling rate of satellite communication system, field-programmable gate array is generally used
Arrange (Field Programmable Gate Array, FPGA) or specific integrated circuit (Application Spicecific
Integrated Circuit, ASIC) etc. special functions chip, with realize to a kind of effect that signal specific is quickly handled
Fruit.
But current special function chip can only support single communication mode, can not extend other application, cause these high at
The utilization rate of this chip is low, the waste of resource is caused, while maintenance cost is high, without preferable Recycle mechanism environment.
Summary of the invention
The embodiment of the present invention provides a kind of digital front-end based on software definition, physical layer architecture and terminal, is defended with realizing
The free switching of star communication system and terrestrial communications systems in same terminal improves the popularity rate and utilization of simple function chip
Rate.
In a first aspect, the embodiment of the invention provides a kind of digital front-end based on software definition, the digital front-end packet
It includes:
Satellite communication front-end circuit, land communication front-end circuit and baseband processing circuitry；The satellite communication front end electricity
Road and the land communication front-end circuit are connected with the baseband processing circuitry respectively；
The satellite communication front-end circuit and the land communication front-end circuit, in the number by way of software configuration
A gating is selected in word front end；And the circuit structure of the satellite communication front-end circuit and the land communication front-end circuit with
And circuit parameter, the configuration for being customized by way of software configuration；
The satellite communication front-end circuit will be by the received satellite-signal of antenna by front end for after being strobed
After processing, it is sent to the baseband processing circuitry；Alternatively, will be passed through by the received satellite baseband signal of the baseband processing circuitry
After crossing front-end processing, it is sent to the antenna；
The land communication front-end circuit will be by the received land signal of antenna by front end for after being strobed
After processing, it is sent to the baseband processing circuitry；Alternatively, will be passed through by the received land baseband signal of the baseband processing circuitry
After crossing front-end processing, it is sent to the antenna.
Second aspect, the embodiment of the invention also provides a kind of physical layer architecture based on software definition, the physical layer knots
Structure includes:
The first controller, application integrated circuit and the rf processor being sequentially connected；In in the application integrated circuit
The digital front-end of any embodiment of that present invention offer, the rf processor, for being connected with antenna are provided；
The rf processor, the aerial signal for will obtain from the antenna are sent to after radio frequency processing
The digital front-end, alternatively, the signal obtained from the digital front-end is sent to the antenna after radio frequency processing；
First controller, for providing gate control signal, the access configuration of software configuration to the digital front-end
One or more in instruction or parameter configuration instruction.
The third aspect, the embodiment of the invention also provides a kind of terminal based on software definition, the terminal includes this hair
The physical layer architecture that bright any embodiment provides.
The technical solution of the embodiment of the present invention is by will be before satellite communication front-end circuit, land communication front-end circuit, navigation
Terminal circuit and baseband processing circuitry collectively constitute a kind of digital front-end based on software definition, and by the first controller, built-in
There are the application integrated circuit of above-mentioned digital front-end and rf processor to be sequentially connected to form a kind of physical layer architecture, ultimately forms
A kind of terminal comprising above-mentioned physical layer architecture, solving simple function chip can only support a kind of communication mode, chip universal
The low problem of rate realizes the free switching of satellite communication system and terrestrial communications systems in same terminal, improves single function
The effect of energy chip utilization rate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of digital front-end of one of the embodiment of the present invention one based on software definition；
Fig. 2 is the structural schematic diagram of digital front-end of one of the embodiment of the present invention two based on software definition；
Fig. 3 is the structure that a kind of land based on software definition provided by Embodiment 2 of the present invention communicates digital front-end component
Schematic diagram；
Fig. 4 is a kind of structure of the satellite communication digital front-end component based on software definition provided by Embodiment 2 of the present invention
Schematic diagram；
Fig. 5 is the structural schematic diagram of physical layer architecture of one of the embodiment of the present invention three based on software definition；
Fig. 6 a is the structural schematic diagram of terminal of one of the embodiment of the present invention four based on software definition；
Fig. 6 b is a kind of signal for application scenarios that the terminal provided in an embodiment of the present invention based on software definition is applicable in
Figure；
Fig. 6 c is a kind of signal for application scenarios that the terminal provided in an embodiment of the present invention based on software definition is applicable in
Figure；
Fig. 6 d is a kind of signal for application scenarios that the terminal provided in an embodiment of the present invention based on software definition is applicable in
Figure.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is a kind of structural schematic diagram for digital front-end based on software definition that the embodiment of the present invention one provides, this reality
It applies satellite communication front-end circuit that example is applicable in terminal device and land communication front-end circuit is selected according to practical application scene
The situation about being connected with baseband processing circuitry of selecting property, the digital front-end include satellite communication front-end circuit 1, land communication front-end electricity
Road 2 and baseband processing circuitry 3.
Satellite communication front-end circuit 1 and land communication front-end circuit 2 are connected with baseband processing circuitry 3 respectively.
Satellite communication front-end circuit and land communication front-end circuit, select one by way of software configuration in digital front-end
Gating；And and the circuit structure of satellite communication front-end circuit and land communication front-end circuit is configured by software configuration mode
And circuit parameter, it realizes software customized configuration, has achieved the purpose that software definition digital front-end.
Software configuration mode of the invention, refer to can be by software operation configured in the way of, e.g. software
Programmed configurations mode and software instruction configuration mode etc..The present invention is by software configuration mode to selecting a choosing in digital front-end
It is logical；And the circuit structure and circuit parameter of satellite communication front-end circuit and land communication front-end circuit.Specifically, described
Satellite communication front-end circuit and the land communication front-end circuit, through the access configuration-direct of software configuration before the number
A gating is selected in end；And the circuit structure and electricity of the satellite communication front-end circuit and the land communication front-end circuit
Road parameter instructs the configuration for being customized by the parameter configuration of software configuration.
Wherein, baseband processing circuitry 3 and satellite communication front-end circuit 1 and land communication front-end circuit 2 are according to reality
Application scenarios select a connection, and receive and dispatch demand according to actual signal by way of software configuration and configure satellite communication front end
The circuit structure and circuit parameter of circuit 1 and land communication front-end circuit 2.It is exemplary, when using satellite communication system, then
Satellite communication front-end circuit is connected to baseband processing circuitry, at this point, sender, which passes through, wirelessly issues signal, by satellite communication
System is transferred to recipient, and needs to receive and dispatch demand according to actual signal, and adaptability configures such as received signal strength indicator
Statistic unit, DC component eliminate parameter involved in unit etc..
In the present embodiment, satellite communication front-end circuit 1 can pass through a satellite communication transceiver (satellite communication TRx)
Be indirectly connected with the antenna, land communication front-end circuit 2 can by a land communication transceiver (land communicate with TRx) with
The antenna is indirectly connected.Wherein, the satellite communication transceiver is logical for parsing acquisition satellite from antenna received signal
Believe signal, or satellite communication signals are sent out by antenna, the land communication transceiver, for received from antenna
Parsing obtains land signal of communication in signal, or land mobile signal is sent out by antenna.
Satellite communication front-end circuit 1, for front-end processing will to be passed through by the received satellite-signal of antenna after being strobed
Afterwards, it is sent to baseband processing circuitry；Alternatively, front-end processing will be passed through by the received satellite baseband signal of baseband processing circuitry
Afterwards, it is sent to antenna.
Wherein, satellite communication front-end circuit 1 has generally comprised transmission unit and receiving unit (not shown), satellite
The transmission unit of communication front-end circuit 1, for front-end processing will to be passed through by the received satellite baseband signal of baseband processing circuitry
Afterwards, it is sent to antenna.The receiving unit of satellite communication front-end circuit 1 is used for will be by the received satellite-signal of antenna by front end
After processing, it is sent to baseband processing circuitry.
Typically, the main function of the satellite communication front-end circuit 1 is to establish satellite communication transceiver and Base-Band Processing
Connection between circuit, that is, by certain signal is carried out via antenna and the received satellite-signal of satellite communication transceiver
It is sent to baseband processing circuitry after processing, or certain place will be carried out by the received base band satellite-signal of baseband processing circuitry
RF transceiver is sent to after reason.The primary clustering that satellite communication front-end circuit 1 includes can be the signal with satellite-signal
Filtering unit, the direct current signal of characteristic matching eliminate component or frequency offset correction component etc..
Land communication front-end circuit 2, for front-end processing will to be passed through by the received land signal of antenna after being strobed
Afterwards, it is sent to baseband processing circuitry；Alternatively, front-end processing will be passed through by the received land baseband signal of baseband processing circuitry
Afterwards, it is sent to antenna.
Wherein, land communication front-end circuit 2 has generally comprised transmission unit and receiving unit (not shown), land
The transmission unit of communication front-end circuit 2, for front-end processing will to be passed through by the received land baseband signal of baseband processing circuitry
Afterwards, it is sent to antenna.The receiving unit of land communication front-end circuit 2 is used for will be by the received land signal of antenna by front end
After processing, it is sent to baseband processing circuitry.
Typically, the main function of the satellite communication front-end circuit 1 is to establish land communication transceiver and Base-Band Processing
Connection between circuit, that is, by certain signal is carried out via antenna and the received land signal of land communication transceiver
It is sent to baseband processing circuitry after processing, or certain place will be carried out by the received base band satellite-signal of baseband processing circuitry
Land communication transceiver is sent to after reason., including dominant circuit element can for the signal characteristic of land signal it is matched
Filtering unit, direct current signal eliminate component or frequency offset correction component etc..
Optionally, according to the structure of specific used antenna, the land communication transceiver and the satellite communication are received
Hair device can be connected with the same antenna respectively, also can connect different antennae.
In the present embodiment, satellite communication front-end circuit 1 and land communication front-end circuit 2 can be to be completely independent, mutually
Nonoverlapping two circuits, it is possible to have certain public lap, and be made up of one or more gating circuit
Circuit, the present embodiment is to this and is not limited.
The technical solution of the present embodiment, by by satellite communication front-end circuit or land communication front-end circuit selectivity with
Baseband processing circuitry is connected, and is respectively used to send and receive satellite communication signals and land signal of communication, solves special function
Chip only supports the problem of single communication mode, has reached the free switching of satellite communication system and terrestrial communications systems, improves
The popularity rate of simple function chip and the effect of utilization rate.
Embodiment two
Fig. 2 is a kind of structural schematic diagram of the digital front-end based on software definition provided by Embodiment 2 of the present invention, this reality
Apply example be applicable to satellite communication front-end circuit and land communication front-end circuit according to practical application scene selectivity and base band
The connected situation of processing circuit, the digital front-end specifically include the first gating circuit 4 being sequentially connected, public passage component 5 with
And second gating circuit 6, and the satellite communication digital front-end component 7 being connected respectively with the second gating circuit and land communication
Digital front-end component 8.
First gating circuit 4, for being connected with antenna；Before satellite communication digital front-end component 7 and land communication number
Component 8 is held, for being connected respectively with baseband processing circuitry 3.
Wherein, satellite communication transceiver, land communication transceiver are connected with antenna respectively, and the first gating circuit 4 passes through each
Communication transceiver is connected with antenna.First gating circuit 4 is used for the signal type according to the signal received by antenna, gating
The connection between the communication transceiver (TRx) and public passage component 5 being adapted with current demand signal type connecting with antenna is logical
Road.Satellite communication digital front-end component 7 and land communicate digital front-end component 8, are connected respectively with baseband processing circuitry 3.
First gating circuit 4 and the second gating circuit 6 gate day for the gate control signal according to software configuration
Connecting path between line, public passage component 5 and satellite communication digital front-end component 7, to constitute satellite communication front end electricity
Road 1；Alternatively, the connecting path between gating antenna, public passage component 5 and land communication digital front-end component 8, to constitute
Land communication front-end circuit 2.
Wherein, the group of public passage component 5, satellite communication digital front-end component 7 and land communication digital front-end component 8
Part structure is configured by the access configuration-direct of software configuration, and, public passage component 8, satellite communication digital front-end
The component parameter of component 7 and land communication digital front-end component 8 is configured by the parameter configuration instruction of software configuration.
The connection that first gating circuit 4 is used to be gated between antenna and public passage component 5 according to gate control signal is logical
Road, the second gating circuit 6 be used for according to gate control signal gate public passage component 5 with it is each communicate digital front-end component it
Between connecting path.
Wherein, above-mentioned gating signal is determined according to currently processed signal type by controller and is sent to gating circuit,
After satellite communication front-end circuit 1 or land communication front-end circuit 2 are strobed, before sending and receiving signals, need according to parameter
Configuration-direct configures the component ginseng of public passage component, satellite communication digital front-end component and land communication digital front-end component
Number.Illustratively, if the current signal for receiving or sending is satellite baseband signal, the first gating circuit 4 is according to controller
The gating signal of transmission gates the connecting path between the satellite communication transceiver being connected with antenna and public passage component, the
The gating signal that two gating circuits 6 are sent according to controller, gating public passage component and satellite communication digital front-end component 7 it
Between connecting path, finally by antenna, satellite communication transceiver, the first gating circuit 4, public passage component 5, second gate electricity
7 composition satellite communication front-end circuits 1 in road 6 and satellite communication digital front-end group, for sending and receiving satellite-signal；If working as
The signal of preceding reception or transmission is land baseband signal, then the gating signal that the first gating circuit 4 is sent according to controller, choosing
Connecting path between the logical land communication transceiver being connected with antenna and public passage component, the second gating circuit 6 is according to control
The gating signal that device processed is sent, gating public passage component communicate the connecting path between digital front-end component 8 with land, finally
Number is communicated by antenna, land communication transceiver, the first gating circuit 4, public passage component 5, the second gating circuit 6 and land
Word front end assemblies 8 constitute land communication front-end circuit 2, for sending and receiving land signal.
Typically, the first gating circuit 4 and the second gating circuit 6 can be one numerical selector of multiselect, or
Program-controlled variable connector etc..
Wherein, public passage component 5 specifically refers to signal (whether satellite communication signals or the land communication to passing through
Signal) carry out versatility processing component.
Optionally, public passage component 5, may include: the received signal strength indicator being sequentially connected statistic unit 51,
DC component eliminates unit 52 and I/Q data corrects unit 53；
The statistic unit 51 of received signal strength indicator, for carrying out the statistics of signal strength instruction to the signal passed through；
Wherein, received signal strength indicator statistic unit (Received Signal Strength Indicator,
RSSI) 51 the signal strength received can be counted, for determining the first controller 31 according to the signal strength or weakness received
The connecting path and configuration parameter for needing to gate, so that gating signal is sent to gating circuit and public passage component 5, with
It realizes and automatically switches working frequency range, operating mode, modulation /demodulation type, data format, encryption mode and communication protocol.Together
When, user can also be by human-computer interaction interface, according to actual needs, autonomous option and installment.
DC component eliminates unit 52, for carrying out filtering out for DC component to the signal passed through.
In the present embodiment, unit is eliminated to the direct current for not carrying information for including in the signal received by DC component
Component is filtered out.
I/Q data calibration unit 53, for the in-phase component and quadrature component progress mismatch repair to the signal passed through.
In existing communication framework, the signal received has IQ two-way (i.e. in-phase component and quadrature component), due to IQ two-way
There are deviation, need to carry out mismatch school by in-phase component and quadrature component of the I/Q data calibration unit 53 to the signal passed through
Just.
Wherein, at least one unit for including in public passage component by the bypass of the access configuration-direct of software configuration or
Person accesses in the public passage component 5, and/or, the cell parameters at least one unit for including in public passage component 5
It is configured by the parameter configuration instruction of software configuration.
In the present embodiment, each unit in public passage component is determined according to the access configuration-direct that controller provides
Whether access in public passage component 5.Above-mentioned access configuration-direct is to be issued by controller according to the signal received or sent,
DC component elimination unit 52 can be used according to access configuration-direct, bypass or selection.It is also possible to by this first
Controller 31 configures the statistic unit 51 of above-mentioned received signal strength indicator, DC component eliminates unit 52 and I/Q data calibration
Parameter involved in unit 53.Illustratively, DC component, which eliminates unit 52, can use smothing filtering calculation, by going through
The DC component of current time slots is eliminated in the calculating of history data, and the direct current of current time slots can also be calculated using the data of current time slots
Component, and application and current time slots need above controller to configure different calculating parameters in calculating process, in terms of meeting
Calculation demand.
In the present embodiment, different terrestrial communications systems (for example, LTE communication system, wimax communication system or
WCDMA communication system etc.) different, the different satellite communication system (day of the structure of land communication digital front-end component that is adapted to
Communication satellite communication system or Teledesic satellite communication system etc.) structure of satellite communication digital front-end component that is adapted to
Also different.Those skilled in the art can be adapted to adaptable land according to the type of actually required communication system to be used
Communicate digital front-end component or satellite communication digital front-end component.
In a specific example, land communicates digital front-end component 8 and is and long term evolution (Long
TermEvolution, LTE) communication system adaptation component, land communicate digital front-end component 8, comprising: land communication send
Unit 81 and land communications reception unit 82, Fig. 3 are the knot that land provided in an embodiment of the present invention communicates digital front-end component
Structure schematic diagram.
Land communicates transmission unit 81, including liter sampling filter component 811, described liter of sampling filter component, for that will lead to
It crosses after the received land baseband signal of the baseband processing circuitry carries out the processing of liter sampling filter, is sent to described public logical
Road component.
Wherein, when communication transmission unit in land is that land communication digital front-end component works under Tx (signal transmission) mode
The unit of starting, the land baseband signal for will be received by baseband processing circuitry is sent to public passage component, with reality
Now land antenna will be sent to by the signal of public passage component processing.On the land that will be received by baseband processing circuitry
Baseband signal be sent in public passage component process needs according to controller by parameter match, determine rise sampling multiple and
The number for the liter sampling filter to be passed through.
Land communications reception unit 82, comprising: carrier wave the polymerization separation unit 821, down-sampled filter part being sequentially connected
822 and cyclic prefix removing component 823.
Wherein, when communications reception unit in land is that land communication digital front-end component works under Rx (signal reception) mode
The unit of starting, for baseband processing circuitry will to be sent to by the received land signal of land antenna after treatment.
Carrier wave polymerize separation unit 821, for that will pass through received treated the land signal of the public passage component
The separating treatment for carrying out polymerization carrier wave obtains separation signal.
In data transmission procedure, use carrier wave polymerization to increase signal bandwidth, so that signal transmission rate is improved, in land
Ground communications reception unit 82 receives after the signal of carrier wave polymerization, first has to carry out carrier wave polymerization separation, to be separated
Signal.
Down-sampled filter part 822 obtains filtering letter after carrying out down-sampled filtering processing to received separation signal
Number.
For the separation signal obtained by polymerization carrier wave separation unit, down-sampled filtering processing is carried out, to reduce signal
Sample rate is established for cell searching with synchronous.Illustratively, signal sampling rate is reduced to 1.92MHz by 20MHz.
Cyclic prefix removing component 823, for removing cyclic prefix information in received filtering signal, before obtaining circulation
Sew removal signal and is sent to the baseband processing circuitry.
It, be due to guaranteeing preferable time synchronization and Frequency Synchronization in signal transmission process in the present embodiment
It is inserted into cyclic prefix (Cyclic Prefix, CP) in signal, after reception channel signal, needs to cut out CP from data, it will be effective
The channel estimation and channel equalization and conciliation module of data feeding baseband processing circuitry are handled.
Wherein, the access configuration-direct that at least one assembly of elements passes through software configuration in land communication digital front-end component
It bypasses or accesses in the land communication digital front-end component, and/or, include in the land communication digital front-end component
Parameters of operating part at least one assembly of elements is configured by the parameter configuration instruction of software configuration.
Each unit component in the present embodiment in land communication digital front-end component 8 is the access provided according to controller
Configuration-direct determines whether to access in land communication digital front-end component 8.
In a specific example, satellite communication digital front-end component 7 is to lead to the component that satellite is adapted to day；Satellite is logical
Believe digital front-end component 7, comprising: satellite communication transmission unit 71 and Satellite Communication Receive unit 72, Fig. 4 are that the present invention is real
The structural schematic diagram of the satellite communication digital front-end component of example offer is provided.
Satellite communication transmission unit 71, including liter sampling filter component 711, described liter of sampling filter component, for that will lead to
It crosses after the received satellite baseband signal of the baseband processing circuitry carries out the processing of liter sampling filter, is sent to described public logical
Road component；
Wherein, when satellite communication transmission unit is that satellite communication digital front-end component works under Tx (signal transmission) mode
The unit of starting, for the satellite baseband signal received by baseband processing circuitry to be sent to public passage component, with reality
Now satellite antenna will be sent to by the signal of public passage component processing.In the satellite that will be received by baseband processing circuitry
Baseband signal, which is sent in public passage component process, to be needed to be matched according to controller by parameter, is determined and is risen sampling filter,
Including the apolegamy of root raised cosine filter (RRC filter).
Satellite Communication Receive unit 72, comprising: the frequency offset correction component 721 and filtering interpolation component 722 being sequentially connected.
Wherein, when Satellite Communication Receive unit is that satellite communication digital front-end component works under Rx (signal reception) mode
The unit of starting, for baseband processing circuitry will to be sent to by the received satellite-signal of satellite antenna after treatment.
Frequency offset correction component 721, for that will be carried out by received treated the satellite-signal of the public passage component
Frequency offset correction obtains frequency offset correction signal.
In wireless communication system, because the carrier wave frequency deviation of transmitting terminal and receiving end will lead to the phase distortion of reception signal, into
And performance for wireless communications is influenced, therefore frequency offset correction is carried out to the satellite-signal received by frequency offset correction component 721,
Obtain frequency offset correction signal.
Filtering interpolation component 722 for carrying out filtering interpolation to received frequency offset correction signal, and obtained interpolation is filtered
Wave signal is sent to the baseband processing circuitry.
The frequency offset correction signal got by frequency offset correction component 721 is subjected to filtering interpolation, wherein interpolation filter
It needs to be matched according to controller parameter, determines parameter.
Wherein, the access configuration-direct that at least one assembly of elements passes through software configuration in satellite communication digital front-end component
In bypass or access satellite communication digital front-end component, and/or, at least one for including in satellite communication digital front-end component
Parameters of operating part in assembly of elements is configured by the parameter configuration instruction of software configuration.
Each unit component in the present embodiment Satellite communication digital front-end component 7 is the access provided according to controller
Configuration-direct determines whether to access in satellite communication digital front-end component 7.
Optionally, digital front-end, further includes:
Navigate front-end circuit 9, and navigation front-end circuit 9 is connected with baseband processing circuitry.
In the present embodiment, navigation front-end circuit 9, satellite communication front-end circuit 1, land communication front-end circuit 2 respectively with base
Tape handling circuit 3 is connected, and the gate control signal sent according to the first controller 31, is gated by the second gating circuit each
Connecting path between front-end circuit and baseband processing circuitry 3.
Navigate front-end circuit 9, for that will be sent at base band by the received navigation signal of antenna after front-end processing
Manage circuit 3.
In the present embodiment, navigation front-end circuit by the received navigation signal of antenna after front-end processing for that will send out
It send to baseband processing circuitry.The navigation front end assemblies that navigation front-end circuit includes do not need uplink, it can not include Tx work
Mode, only navigational communications receiving unit.
Optionally, digital front-end, further includes:
The navigation digital front-end component 9 being connected with the second gating circuit, first gating circuit are also used to and the day
Line is connected；The navigation digital front-end component 9 is connected with the baseband processing circuitry 3.
The navigation digital front-end component 9 that navigation digital front end circuitry includes is similar to satellite communication digital front-end component 7, packet
Frequency offset correction component and filtering interpolation component are included, but since the good sampling frequency parameters of bandwidth are different, the order of respective filter is not
Together, the number through wave filter is not also identical, needs controller to pass through parameter apolegamy to determine.
First gating circuit 4 and the second gating circuit 6, are also used to: according to the gate control signal of software configuration, choosing
Connecting path between exceedingly high line, public passage component 5, navigation digital front-end component 9 and baseband processing circuitry, to constitute navigation
Front-end circuit.
In the present embodiment, the first gating circuit 4 be used for according to the gate control signal of software configuration gate antenna with it is public
Connecting path between channel components 5, the second gating circuit 6 be used for according to gate control signal gate public passage component 5 with
Connecting path between navigation digital front-end component 9.Finally, navigation antenna, the first gating circuit 4, public passage component 5,
Two gating circuits 6 and navigation digital front-end component 9 constitute navigation front-end circuit, for sending navigation signal.
The technical solution of the present embodiment, by will satellite communication front-end circuit, land communication front-end circuit and navigation before
Being connected with baseband processing circuitry for terminal circuit selectivity, is respectively used to send and receive satellite communication signals, land signal of communication
And navigational communications signal, it solves the problems, such as that special function chip only supports single communication mode, realizes and only increase newly soft
Part module can realize the technical effect of new business or modulation system, reach satellite communication system, land communication system
The free switching of system and navigation communication system improves the popularity rate of simple function chip and the effect of utilization rate.
Embodiment three
Fig. 5 is a kind of structural schematic diagram for physical layer architecture based on software definition that the embodiment of the present invention three provides, this
Embodiment be applicable to satellite communication front-end circuit and land communication front-end circuit according to practical application scene selectivity and base
The connected situation of tape handling circuit, the physical layer architecture include the first controller 31 being sequentially connected, application integrated circuit 32 with
And rf processor 33；The digital front-end that built-in any embodiment of that present invention provides in application integrated circuit 32, rf processor
33, for being connected with antenna.
Rf processor 33, the aerial signal for will obtain from the antenna are sent to institute after radio frequency processing
Digital front-end is stated, alternatively, the signal obtained from the digital front-end is sent to the antenna after radio frequency processing.
Wherein, radio frequency is a kind of high-frequency ac power transformation magnetic wave, and frequency range is between 300KHZ-300GHz, radio frequency processing
Device (Radio Frequency, RF) can will pass through radio frequency by digital front-end treated signal in receiving signal process
Be sent to antenna after processing, at the same can in receiving signal process, by the aerial signal obtained from antenna after radio frequency processing,
It is sent to digital front-end and carries out the processing such as frequency offset correction, filtering interpolation.
Typically, be integrated with satellite communication transceiver as shown in Figure 2 in rf processor, land communication transceiver with
And navigation signal transceiver.
First controller 31, for providing the gate control signal of software configuration to the digital front-end, access configuration refers to
One or more in order or parameter configuration instruction.
Wherein, the first controller 31 for complete physical layer synchronization, timing adjustment system number, channel estimation, channel coding,
Send the configuration-direct of digital front-end and the control etc. to rf processor.Firstly, being taken out from shared random access memory
By the signal that second controller 35 is handled, after coding, modulation, demodulation, framing, application integration electricity is sent the data to
Road.Illustratively, the first controller can be dsp processor, and the control to rf processor includes that (sender increases APC automatically
Benefit control), AFC calibration (automatic frequency control), AGC calibrate (receiver automatic growth control) configuration parameter or coefficient.
Optionally, physical layer architecture, further includes:
Second controller 35, shared random access memory 34 and timing control module 36；
The shared random access memory is connected with the second controller and first controller respectively, described
Timing control module is connected with first controller, application integrated circuit and rf processor respectively, second control
Device, for being connected with application layer structure；
The second controller 35, for application layer complete information butt joint, complete with the matched information of upper-layer protocol at
Reason.
Second controller 35 with application layer relevant device for docking, completion upper-layer protocol relevant treatment, illustratively, the
Two controllers 35 can be arm processor, and the digital audio that arm processor can send the audio collection module received is believed
Number, and need to complete associated transport protocol conversion according to user, finally by treated, shared random access memory is written in data
Device 34, while data notice of delivery is sent to the first controller 31.
The shared random access memory, for realizing between first controller 31 and the second controller 35
Information exchange.
In the present embodiment, the physical layer architecture can also include Double Data Rate synchronous DRAM (Double
Data Rate Synchronous Dynamic Random Access Memory, abbreviation DDR), as shared arbitrary access
The supplement of memory 34, while being connect with the first controller 31 and second controller 35.
The timing control module 36, for for the second controller 35, the application integrated circuit 32 and described
Rf processor 33 provides accurate timing.
The present invention by will satellite communication front-end circuit, land communication front-end circuit, navigation front-end circuit and base band at
Reason circuit collectively constitutes a kind of digital front-end, and by the first controller, be built-in with the application integrated circuit of above-mentioned digital front-end with
And rf processor is sequentially connected to form a kind of physical layer architecture, ultimately forms a kind of terminal comprising above-mentioned physical layer architecture,
A kind of communication mode can only be supported by solving simple function chip, can by increase new software module realize new business or
Person's modulation system, simultaneously because the terminal comprising above-mentioned physical structure can form different modulating waveform and communication protocol, it can be real
It is now compatible with the station telecommunication of old system, extend radio station service life, save the cost.
Example IV
Fig. 6 is a kind of structural schematic diagram for terminal based on software definition that the embodiment of the present invention four provides, the terminal
Including the physical layer architecture that any embodiment of that present invention provides, the physical layer architecture, comprising:
The first controller 31, application integrated circuit 32 and the rf processor 33 being sequentially connected；The application integration electricity
The digital front-end that built-in any embodiment of that present invention provides in road 32, the rf processor 33, for being connected with antenna；
The rf processor 33, the aerial signal for will obtain from the antenna are sent after radio frequency processing
To the digital front-end, alternatively, the signal obtained from the digital front-end is sent to the day after radio frequency processing
Line；
First controller 31, for the digital front-end provide gate control signal, access configuration-direct or
One or more in parameter configuration instruction.
The digital front-end includes:
Satellite communication front-end circuit, land communication front-end circuit and baseband processing circuitry；The satellite communication front end electricity
Road and the land communication front-end circuit are connected with the baseband processing circuitry respectively；
The satellite communication front-end circuit and the land communication front-end circuit, in the number by way of software configuration
A gating is selected in word front end；And the circuit structure of the satellite communication front-end circuit and the land communication front-end circuit with
And circuit parameter, the configuration for being customized by way of software configuration；
The satellite communication front-end circuit will be by the received satellite-signal of antenna by front end for after being strobed
After processing, it is sent to the baseband processing circuitry；Alternatively, will be passed through by the received satellite baseband signal of the baseband processing circuitry
After crossing front-end processing, it is sent to the antenna；
The land communication front-end circuit will be by the received land signal of antenna by front end for after being strobed
After processing, it is sent to the baseband processing circuitry；Alternatively, will be passed through by the received land baseband signal of the baseband processing circuitry
After crossing front-end processing, it is sent to the antenna.
Fig. 6 b is a kind of schematic diagram for application scenarios that terminal provided in an embodiment of the present invention is applicable in, and it is particularly applicable to defend
The voice transfer of star system point-to-point transmission, concrete signal transmission process are as follows:
1) digital audio and video signals from audio collection module are received by the second controller of transmitting terminal 35, user can basis
It needs to complete the conversion of associated transport agreement in above-mentioned second controller 35, and shared arbitrary access is written in signal by treated
Memory 34, while data notice of delivery is sent to the first controller 31；
2) the first controller 31 takes out from shared random access memory 34 by second in response to the data notice of delivery
The signal to be processed that controller 35 is written, and the signal encoded, is modulated, after framing, it is sent to application integrated circuit
32, application integrated circuit 32 is that the first controller 31 provides communication link common IP, for example, FFT, TURBO, VITERB, POLAR
The type (for example, satellite-signal) according to currently transmitted signal is also needed Deng, the first controller 31, determines the circuit for needing to gate
(by antenna, satellite communication transceiver, the first gating circuit 4, public passage component 5, the second gating circuit 6 and satellite communication
7 composition satellite communication front-end circuits 1 of digital front-end group), and gating is sent to the first gating circuit 4 and the second gating circuit 6
Signal, while the first controller 31 it is also required to provide the corresponding ginseng of the needs of each Signal Processing Element in public passage component
Number, the transmitting-receiving control parameter of rf processor；
3) data received are sent into and rise sampling filter component 711 by application integrated circuit 32, will finally be up-sampled,
Treated that data are sent to rf processor 33 for filtering processing, modulation, framing and digital auto-gain compensative etc..
4) after the digital information received is completed digital-to-analogue conversion (DA conversion) by rf processor 33, by analog signal frequency conversion
It is sent to satellite communication frequency range.
Specific satellite signal receiving process is as follows:
1) satellite-signal received is passed through analog filtering, down coversion, analog-to-digital conversion by the rf processor 33 of receiving end
The digital signal that (AD conversion) obtains is sent to application integrated circuit 32, before the satellite communication number in application integrated circuit 32
End component 7 carries out the processing such as frequency offset correction and filtering interpolation to the digital signal received, and digital signal is sent out by treated
It is sent to the first controller 31；
2) the first controller 31 writes information after carrying out channel estimation, equilibrium and decoding according to the digital signal received
Enter shared random access memory 34；
3) after sharing the completion upper-layer protocol conversion of random access memory 34, audio player is sent information to；
4) the first controller 31 calculate time delay thresholding (Timing offset) after, adjust timing control module 36.
Fig. 6 c is a kind of schematic diagram for application scenarios that terminal provided in an embodiment of the present invention is applicable in, and it is particularly applicable to lands
Voice transfer between ground communication terminal is sent to receiving end after the data transmission between land terminal needs to handle by core net,
Rather than point-to-point transmission, concrete signal transmission process are as follows:
1) land communication receiver receives data from rf processor 33, by analog-to-digital conversion (AD conversion), according to first
The gating signal that processor 31 provides gates the connecting path between land communication front-end component 8 and baseband processing circuitry 3, will
Data are sent into land by public passage component 5 and are communicated in digital front-end component 8；
2) the digital signal progress carrier wave polymerization received is separated by land communication digital front-end component 8, is down-sampled, gone
After CP, baseband processing circuitry 3 is sent by valid data.Wherein, the mode for removing CP is configured by the first controller 31, can be with
The position for removing CP is determined according to the normal subframe of long term evolution communication system or extended format.It is worth noting that,
If the signal received is not carrier aggregation signal, do not need to carry out carrier wave polymerization separating treatment；If the signal received
It is 20MHz bandwidth, does not then need to carry out down-sampled processing, directly carries out CP processing (i.e. in land communication digital front-end component 8
Each unit be the access configuration-direct issued according to the first controller 31, selective access land communicates digital front-end group
In part 8)；
3) transmitting terminal is communicated for land, carries out a liter sampling processing also according to needs.
Fig. 6 d is a kind of schematic diagram for application scenarios that terminal provided in an embodiment of the present invention is applicable in, and it is particularly applicable to lead
System data transmission of navigating since following scene only realizes navigation feature does not need that uplink baseband processing circuit 3 is supported only to need to connect
The navigator fix signal for receiving multi-satellite, completes the positioning and navigation of present terminal, concrete signal receive process are as follows:
1) terminal receives data from rf processor 33 and is mentioned by analog-to-digital conversion (AD conversion) according to first processor 31
The gating signal of confession, the connecting path between gating navigation front end assemblies 8 and baseband processing circuitry 3, and by data by public
Channel components 5, feeding should navigate in digital front-end component 9；
2) frequency offset correction is carried out to the digital signal received by navigation digital front-end component 9 and filtering interpolation is handled
Afterwards, baseband processing circuitry 3 is sent by valid data.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of digital front-end based on software definition characterized by comprising satellite communication front-end circuit, before the communication of land
Terminal circuit and baseband processing circuitry；The satellite communication front-end circuit and the land communication front-end circuit respectively with it is described
Baseband processing circuitry is connected；
The satellite communication front-end circuit and the land communication front-end circuit, by way of software configuration before the number
A gating is selected in end；And the circuit structure and electricity of the satellite communication front-end circuit and the land communication front-end circuit
Road parameter, the configuration for being customized by way of software configuration；
The satellite communication front-end circuit, for front-end processing will to be passed through by the received satellite-signal of antenna after being strobed
Afterwards, it is sent to the baseband processing circuitry；Alternatively, before being passed through by the received satellite baseband signal of the baseband processing circuitry
After the processing of end, it is sent to the antenna；
The land communication front-end circuit, for front-end processing will to be passed through by the received land signal of antenna after being strobed
Afterwards, it is sent to the baseband processing circuitry；Alternatively, before being passed through by the received land baseband signal of the baseband processing circuitry
After the processing of end, it is sent to the antenna.
2. digital front-end according to claim 1, which is characterized in that the digital front-end specifically includes:
The first gating circuit, public passage component and the second gating circuit being sequentially connected, and selected respectively with described second
The connected satellite communication digital front-end component of circuit passband and land communicate digital front-end component；
First gating circuit, for being connected with the antenna；The satellite communication digital front-end component and land communication
Digital front-end component, for being connected respectively with baseband processing circuitry；
First gating circuit and second gating circuit, for the gate control signal according to software configuration, gating
Connecting path between the antenna, the public passage component and the satellite communication digital front-end component, to constitute
State satellite communication front-end circuit；Alternatively, gating the antenna, the public passage component and land communication digital front-end
Connecting path between component, to constitute the land communication front-end circuit；
Wherein, the component of the public passage component, satellite communication digital front-end component and land communication digital front-end component
Structure is configured by the access configuration-direct of software configuration, and, the public passage component, satellite communication digital front-end
The component parameter of component and land communication digital front-end component is configured by the parameter configuration instruction of software configuration.
3. digital front-end according to claim 2, which is characterized in that the public passage component, comprising: be sequentially connected
The statistic unit of received signal strength indicator, DC component eliminate unit and I/Q data corrects unit；
The statistic unit of the received signal strength indicator, for carrying out the statistics of signal strength instruction to the signal passed through；
The DC component eliminates unit, for carrying out filtering out for DC component to the signal passed through；
The I/Q data calibration unit, for the in-phase component and quadrature component progress mismatch repair to the signal passed through；
Wherein, at least one unit for including in the public passage component by the bypass of the access configuration-direct of software configuration or
Person accesses in the public passage component, and/or, the unit ginseng at least one unit for including in the public passage component
Number is configured by the parameter configuration instruction of software configuration.
4. digital front-end according to claim 2, which is characterized in that land communication digital front-end component be with it is long-term
The component of evolution communication systems adaptation, the land communicate digital front-end component, comprising: land communicates transmission unit, Yi Jilu
Ground communications reception unit；
The land communicates transmission unit, including liter sampling filter component, and described liter of sampling filter component, being used for will be by described
After the received land baseband signal of baseband processing circuitry carries out liter sampling filter processing, it is sent to the public passage group
Part；
The land communications reception unit, comprising: the carrier wave being sequentially connected polymerize separation unit, down-sampled filter part and follows
Ring prefix removing component；
The carrier wave polymerize separation unit, for will received treated that land signal carries out by the public passage component
It polymerize the separating treatment of carrier wave, obtains separation signal；
The down-sampled filter part obtains filtering signal after carrying out down-sampled filtering processing to received separation signal；
The cyclic prefix removing component obtains cyclic prefix for removing cyclic prefix information in received filtering signal
Removal signal is sent to the baseband processing circuitry；
Wherein, the access configuration-direct that at least one assembly of elements passes through software configuration in the land communication digital front-end component
It bypasses or accesses in the land communication digital front-end component, and/or, include in the land communication digital front-end component
Parameters of operating part at least one assembly of elements is configured by the parameter configuration instruction of software configuration.
5. digital front-end according to claim 2, which is characterized in that the satellite communication digital front-end component is logical with day
The component of satellite communication system adaptation；The satellite communication digital front-end component, comprising: satellite communication transmission unit, Yi Jiwei
Star communications reception unit；
The satellite communication transmission unit, including liter sampling filter component, described liter of sampling filter component, being used for will be by described
After the received satellite baseband signal of baseband processing circuitry carries out liter sampling filter processing, it is sent to the public passage group
Part；
The Satellite Communication Receive unit, comprising: the frequency offset correction component and filtering interpolation component being sequentially connected；
The frequency offset correction component, for frequency deviation will to be carried out by received treated the satellite-signal of the public passage component
Correction, obtains frequency offset correction signal；
The filtering interpolation component, for carrying out filtering interpolation, and the filtering interpolation that will be obtained to received frequency offset correction signal
Signal is sent to the baseband processing circuitry；
Wherein, the access configuration-direct that at least one assembly of elements passes through software configuration in the satellite communication digital front-end component
It bypasses or accesses in the satellite communication digital front-end component, and/or, include in the satellite communication digital front-end component
Parameters of operating part at least one assembly of elements is configured by the parameter configuration instruction of software configuration.
6. according to the described in any item digital front-ends of claim 2-5, which is characterized in that further include: navigation front-end circuit；It is described
Navigation front-end circuit is connected with the baseband processing circuitry；
The navigation front-end circuit, for institute will to be sent to by the received navigation signal of the antenna after front-end processing
State baseband processing circuitry.
7. digital front-end according to claim 6, which is characterized in that the digital front-end is specific further include: with the second choosing
The connected navigation digital front-end component of circuit passband, first gating circuit are also used to be connected with the antenna；The navigation number
Word front end assemblies are connected with the baseband processing circuitry；
First gating circuit and second gating circuit, are also used to: according to the gate control signal of software configuration,
Gate the company between the antenna, the public passage component, the navigation digital front-end component and the baseband processing circuitry
Road is connected, to constitute the navigation front-end circuit.
8. a kind of physical layer architecture based on software definition characterized by comprising the first controller for being sequentially connected, application
Integrated circuit and rf processor；In the application integrated circuit before built-in described in any item numbers such as claim 1-7
End, the rf processor, for being connected with antenna；
The rf processor, the aerial signal for will obtain from the antenna are sent to described after radio frequency processing
Digital front-end, alternatively, the signal obtained from the digital front-end is sent to the antenna after radio frequency processing；
First controller, for providing gate control signal, the access configuration-direct of software configuration to the digital front-end
Or the one or more in parameter configuration instruction.
9. physical layer architecture according to claim 8, which is characterized in that further include: second controller, shared arbitrary access
Memory and timing control module；
The shared random access memory is connected with the second controller and first controller respectively, the timing
Control module is connected with first controller, application integrated circuit and rf processor respectively, the second controller, uses
It is connected in application layer structure；
The second controller is completed and the matched information processing of upper-layer protocol for completing information butt joint with application layer；
The shared random access memory is handed over for realizing the information between first controller and the second controller
Mutually；
The timing control module, for being the second controller, the application integrated circuit and the rf processor
Accurate timing is provided.
10. a kind of terminal based on software definition, which is characterized in that including physical layer architecture as claimed in claim 8 or 9.
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