CN106772467B - L frequency range uplink injection transmitting signal generating apparatus - Google Patents
L frequency range uplink injection transmitting signal generating apparatus Download PDFInfo
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- CN106772467B CN106772467B CN201611034794.9A CN201611034794A CN106772467B CN 106772467 B CN106772467 B CN 106772467B CN 201611034794 A CN201611034794 A CN 201611034794A CN 106772467 B CN106772467 B CN 106772467B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
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- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention discloses L frequency range uplinks to inject transmitting signal generating apparatus, is related to satellite navigation system.It is mainly made of monitoring computer, network transmission module, dsp processor, FPGA, D/A conversion module, radio-frequency modulations module and filter.The present invention mainly uses FPGA+DSP embedded program modular form to realize the real-time operation of high-speed figure broadband signal and output, setting output analog differential orthogonal signalling are converted by high-speed d/a, radio-frequency modulations module carries out direct quadrature up-conversion, and frequency point is exported using digital control scheme setting radio frequency, flexibility is high, can be with outputting high quality radiofrequency signal using filter；The present invention has many advantages, such as that hardware configuration is simple, integrated level is high, versatility is good, flexibility ratio is high and application's expansibility, it is widely applied and verifies in Beidou satellite navigation system, especially suitable for the broadband in satellite navigation system, high-precision L frequency range uplink injection transmitting signal generating device.
Description
Technical field
The present invention relates to broadband signal generating means a kind of in field of satellite navigation, especially suitable for Beidou satellite navigation system
The real-time generation of high-precision L frequency range uplink injection transmitting signal in system.
Background technique
L frequency range uplink injection transmitting signal utilizes mainly to satellite injection navigation message and management data in navigation system
Uplink injection transmitting signal completes precise distance measurement and guidance satellite platform time between star ground, is the urban satellite navigation service and platform management
And Satellite Orbit Determination provides safeguard, while ensuring that the time system of satellite platform is reliable and stable.Beidou Global Satellite Navigation System
Number biography reliability, range accuracy, time guiding function, safety and anti-interference ability etc. of uplink injection are proposed higher
Performance requirement propose reasonable, efficient, advanced, feasible L frequency range uplink injection in conjunction with China's technical level and system environments
Transmitting Design of Signal scheme is particularly important.
It is higher and higher to the required precision of navigation neceiver with the development that satellite technology is applied, therefore, to navigation signal
The requirement of emitter is also higher and higher, not only needs to generate the navigation signal for being similar to satellite, is also required to analog satellite
Relative motion and multipath effect generate error, high-precision Dynamic Signal is generated, to examine the dynamic of navigation neceiver
Capturing and tracking performances and precision, traditional method are to calculate Doppler by given emulation data using DDS integrated chip
Offset updates the frequency control word and phase control words of external DDS according to certain intervals, and it is integrated that Adjustment precision is limited to DDS
The parameter of chip, and be likely to result in the discontinuous of time adjustment frequency is jumped larger, occupy hardware board area also compared with
Greatly.
Summary of the invention
It is an object of the invention to according in above-mentioned background technique to uplink inject transmitting signal high performance index require and
Overcome the shortcomings of that conventional method realizes analog satellite Doppler motion using DDS integrated chip and provides a kind of L of low complex degree
Frequency range uplink injection transmitting signal generating apparatus.The present invention has enough versatilities, flexibility and certain scalability, hardware
Structure is simply easily achieved.
The object of the present invention is achieved like this: L frequency range uplink injection transmitting signal generating apparatus, including monitoring calculate
Machine, network transmission module, dsp processor, FPGA, D/A conversion module, radio-frequency modulations module and filter, FPGA output reset
For signal to dsp processor, the FPGA includes data management module, text memory module, spreading code generation module, control word
It is memory module, time frequency signal generation module, message coding and correction verification module, band spectrum modulation module, numerically-controlled oscillator, orthogonal
Modulation module and signal switching module；
Monitoring computer is exported for generating a variety of instructions, by each instruction by network transmission module and data management module
To dsp processor；Monitoring computer is also used to receive dsp processor and is sent by data management module and network transmission module
Status information；A variety of instructions include that control signal generates format, modulation intelligence, link setup target, modulation bandwidth, modulation
The instruction of mode, dynamic delay, output state and watt level；
Each instruction that network transmission module is used to monitor computer output is exported according to network UDP transport protocol to data
Management module；It is also used to export the status information that data management module exports to monitoring computer；
Each instruction that data management module is used to receive carries out data transmit-receive and differentiates management and connect by external memory
Mouth is exported to dsp processor；It is also used to export the status information that dsp processor exports to network transmission module；It is also used to connect
Receive the status information that signal switching module, D/A conversion module, time frequency signal generation module and radio-frequency modulations module export respectively；
Dsp processor will be for that will control signal modulation information, link setup target, modulation bandwidth, modulation system and dynamic delay
Instruction parse and corresponding to generate two branch textual information of I, Q, temporal information, satellite ID, spreading code clock control word, carrier wave
Two branch textual information of I, Q is exported by data management module to text and is stored by control word and time and frequency standards enable signal
Module is stored, and temporal information and satellite ID is exported by data management module to spreading code generation module, by spreading code
Clock control word and carrier Control word, which are exported by data management module to control word memory module, to be stored, by time and frequency standards
Enable signal is exported by data management module to time frequency signal generation module；Dsp processor is also used to obtain status information simultaneously
Monitoring computer is sent to by data management module and network transmission module；The status information includes that time frequency signal generates
The output of the working condition, signal switching module of module, the output of the working condition of D/A conversion module and radio-frequency modulations module；
Text memory module is used to the two branch textual information of I, Q of input being stored in respective RAM memory space respectively, and
It exports under the driving of 1PPS reference signal and text clock signal to message coding and correction verification module；
Spreading code generation module is used for satellite ID and temporal information according to input, and control periodic spreading code generates multinomial
Formula and no periodic nonlinear precise code module generate two branch of I, Q respectively under the driving of 1PPS reference signal and spreading code clock
Spreading codes information is simultaneously exported to band spectrum modulation module；
Control word memory module is used to that spreading code clock control word will to be inputted and carrier Control word is stored in respective RAM respectively
Memory space is simultaneously exported respectively under the driving that control word reads clock signal and 1PPS reference signal to numerically-controlled oscillator；
Time frequency signal generation module is used for spreading code clock, time and frequency standards enable signal and the reference clock that will be inputted
10MHz and 1PPS generates control word reading clock letter after carrying out frequency multiplication and scaling down processing by Time and Frequency Synchronization and frequency phase lock ring
Number, 1PPS reference signal, text clock signal and system work clock, control word reading clock signal is exported to control word and is deposited
Module is stored up, 1PPS reference signal is exported to text memory module, spreading code generation module, control word memory module, text and is compiled
Code and correction verification module and numerically-controlled oscillator, text clock signal is exported to text memory module and message coding and verification
Module exports system work clock to numerically-controlled oscillator, orthogonal modulation module and D/A conversion module；
Message coding and correction verification module will be for that will input two branch textual information of I, Q in 1PPS reference signal and text clock
Under the driving of signal complete channel coding and calculate CRC check, and export two branch of I, Q coding after textual information to spread adjust
Molding block；
Text letter after two branch spreading codes information of I, Q and two branch of I, Q coding that band spectrum modulation module is used to input
Breath carries out digital spread spectrum operation under the driving of spreading code clock and obtains two branch spread-spectrum signal of I, Q, and exports to orthogonal modulation
Module；
Numerically-controlled oscillator is used for spreading code clock control word, system work clock and the 1PPS reference signal that will be inputted
Spreading code clock is generated under Direct Digital Synthesizer effect and is exported to band spectrum modulation module, spreading code generation module
With time frequency signal generation module, carrier Control word, system work clock and 1PPS reference signal are in direct digital frequency synthesier
Device effect is lower to be generated sinusoidal carrier and cosine carrier and is exported respectively to orthogonal modulation module；
Two branch spread-spectrum signal of I, Q, sinusoidal carrier and the cosine carrier that orthogonal modulation module is used to input are in system work
Make to carry out under the driving of clock after digital modulation obtains one phase of big-dipper satellite system signal and global system signal, by big-dipper satellite
One phase system signal and global system signal are exported respectively to signal switching module；
Signal switching module is used to one phase of the big-dipper satellite system signal of input and global system signal switching over choosing
It selects, and exports one of system signal to D/A conversion module；It is also used to export oneself state information to data management mould
Block；
D/A conversion module is for being converted into analogue difference for the Beidou system signal of input under the driving of system work clock
After dividing orthogonal signalling, analog differential orthogonal signalling are exported to radio-frequency modulations module；It is also used to for oneself state information being output to
Data management module；
Radio-frequency modulations module under reference clock 10MHz signal function for carrying out the analog differential orthogonal signalling of input
After orthogonal modulation, up-conversion obtain up-conversion signal, output up-conversion signal to filter；It is also used to oneself state information is defeated
Data management module is arrived out；
The interference signal that filter is used to filter out up-conversion signal obtains radiofrequency signal.
The present invention realizes that signal generates using the embedded-type modularized program form of FPGA+DSP, and hardware configuration is simply easy to real
Now, flexibility is high and application's expansibility is strong, to adapt to Beidou satellite navigation system construction, can generate two kinds of signal system lattice
Formula totally four channel signals, can output signal under analog satellite real motion state, dynamic range speed ± 8000m/s adds
Speed ± 500m/s2, 700~2700MHz of rf frequency output area is supported to effectively inhibit using digital arrays
The generation of image frequency components, avoids biggish spurious components, and output power signal uses numerical control accurate attenuation.
The present invention has the advantages that for background technique
(1) present invention uses software radio framework, realizes high speed by the embedded-type modularized program form of FPGA+DSP
Digital broadband signal real-time operation processing is converted and defeated by good digital device and high-speed A/D converter realization signal
Out, compatible multi-signal system format uplink transmitting signal generates, and has good versatility.
(2) analog satellite Doppler's dynamic delay is realized using numerically-controlled oscillator in the present invention, using in FPGA piece
Resource completes multistage DDS adjustment, generates dynamic clock, improve efficiency, while overcoming traditional scheme and integrating core using DDS
Piece Adjustment precision is limited, and the frequency of time adjustment is discontinuous, jump is larger, occupies the big disadvantage of hardware board area.
(3) present invention supports to generate two kinds of signal system formats of Beidou navigation totally four channel signals, being capable of analog satellite
Output signal under real motion state, velocity interval ± 8000m/s, acceleration range ± 500m/s2, rf frequency output area
700~2700MHz effectively inhibits the generation of image frequency components using digital arrays, avoids biggish spuious point
Amount, output power signal use numerical control accurate attenuation.
(4) under the premise of guaranteeing to generate uplink injection transmitting signal high performance index, the signal generating apparatus complexity
It is low, program is expansible, software and hardware is easily realized, reliable and low in cost.
Detailed description of the invention
Fig. 1 is control signal generating apparatus modular functionality block diagram of the invention.
Fig. 2 is that dsp processor of the invention completes numerical calculation and signal control block diagram.
Specific embodiment
Below with reference to Fig. 1 and Fig. 2, the present invention is described further.
L frequency range uplink injection transmitting signal generating apparatus, including monitoring computer, network transmission module, dsp processor,
FPGA, D/A conversion module, radio-frequency modulations module and filter, FPGA output reset signal to dsp processor, FPGA include number
It is compiled according to management module, text memory module, spreading code generation module, control word memory module, time frequency signal generation module, text
Code and correction verification module, band spectrum modulation module, numerically-controlled oscillator, orthogonal modulation module and signal switching module；
Monitoring computer is exported for generating a variety of instructions, by each instruction by network transmission module and data management module
To dsp processor；Monitoring computer is also used to receive dsp processor and is sent by data management module and network transmission module
Status information；A variety of instructions include that control signal generates format, modulation intelligence, link setup target, modulation bandwidth, modulation
The instruction of mode, dynamic delay, output state and watt level；
Each instruction that network transmission module is used to monitor computer output is exported according to network UDP transport protocol to data
Management module；It is also used to export the status information that data management module exports to monitoring computer；
Each instruction that data management module is used to receive carries out data transmit-receive and differentiates management and connect by external memory
Mouth is exported to dsp processor；It is also used to export the status information that dsp processor exports to network transmission module；It is also used to connect
Receive the status information that signal switching module, D/A conversion module, time frequency signal generation module and radio-frequency modulations module export respectively；
Dsp processor will be for that will control signal modulation information, link setup target, modulation bandwidth, modulation system and dynamic delay
Instruction parse and corresponding to generate two branch textual information of I, Q, temporal information, satellite ID, spreading code clock control word, carrier wave
Two branch textual information of I, Q is exported by data management module to text and is stored by control word and time and frequency standards enable signal
Module is stored, and temporal information and satellite ID is exported by data management module to spreading code generation module, by spreading code
Clock control word and carrier Control word, which are exported by data management module to control word memory module, to be stored, by time and frequency standards
Enable signal is exported by data management module to time frequency signal generation module；Dsp processor is also used to obtain status information simultaneously
Monitoring computer is sent to by data management module and network transmission module；The status information includes that time frequency signal generates
The output of the working condition, signal switching module of module, the output of the working condition of D/A conversion module and radio-frequency modulations module；
Text memory module is used to the two branch textual information of I, Q of input being stored in respective RAM memory space respectively, and
It exports under the driving of 1PPS reference signal and text clock signal to message coding and correction verification module；
Spreading code generation module is used for satellite ID and temporal information according to input, and control periodic spreading code generates multinomial
Formula and no periodic nonlinear precise code module generate two branch of I, Q respectively under the driving of 1PPS reference signal and spreading code clock
Spreading codes information is simultaneously exported to band spectrum modulation module；
Control word memory module is used to that spreading code clock control word will to be inputted and carrier Control word is stored in respective RAM respectively
Memory space is simultaneously exported respectively under the driving that control word reads clock signal and 1PPS reference signal to numerically-controlled oscillator；
Time frequency signal generation module is used for spreading code clock, time and frequency standards enable signal and the reference clock that will be inputted
10MHz and 1PPS generates control word reading clock letter after carrying out frequency multiplication and scaling down processing by Time and Frequency Synchronization and frequency phase lock ring
Number, 1PPS reference signal, text clock signal and system work clock, control word reading clock signal is exported to control word and is deposited
Module is stored up, 1PPS reference signal is exported to text memory module, spreading code generation module, control word memory module, text and is compiled
Code and correction verification module and numerically-controlled oscillator, text clock signal is exported to text memory module and message coding and verification
Module exports system work clock to numerically-controlled oscillator, orthogonal modulation module and D/A conversion module；
Message coding and correction verification module will be for that will input two branch textual information of I, Q in 1PPS reference signal and text clock
Under the driving of signal complete channel coding and calculate CRC check, and export two branch of I, Q coding after textual information to spread adjust
Molding block；Message coding and correction verification module using Turbo coding, LDPC coding and CRC check generator polynomial carry out coding and
Verification.
Text letter after two branch spreading codes information of I, Q and two branch of I, Q coding that band spectrum modulation module is used to input
Breath carries out digital spread spectrum operation under the driving of spreading code clock and obtains two branch spread-spectrum signal of I, Q, and exports to orthogonal modulation
Module；Band spectrum modulation module carries out band spectrum modulation using the two addend word arithmetic of binary system mould.
Numerically-controlled oscillator is used for spreading code clock control word, system work clock and the 1PPS reference signal that will be inputted
Spreading code clock is generated under Direct Digital Synthesizer effect and is exported to band spectrum modulation module, spreading code generation module
With time frequency signal generation module, carrier Control word, system work clock and 1PPS reference signal are in direct digital frequency synthesier
Device effect is lower to be generated sinusoidal carrier and cosine carrier and is exported respectively to orthogonal modulation module；
Two branch spread-spectrum signal of I, Q, sinusoidal carrier and the cosine carrier that orthogonal modulation module is used to input are in system work
Make to carry out under the driving of clock after digital modulation obtains one phase of big-dipper satellite system signal and global system signal, by big-dipper satellite
One phase system signal and global system signal are exported respectively to signal switching module；Orthogonal modulation module uses binary phase-shift key
Control and quadrature phase shift keying carry out orthogonal modulation.
Signal switching module is used to one phase of the big-dipper satellite system signal of input and global system signal switching over choosing
It selects, and exports one of system signal to D/A conversion module；It is also used to export oneself state information to data management mould
Block；
D/A conversion module is for being converted into analogue difference for the Beidou system signal of input under the driving of system work clock
After dividing orthogonal signalling, analog differential orthogonal signalling are exported to radio-frequency modulations module；It is also used to for oneself state information being output to
Data management module；
Radio-frequency modulations module under reference clock 10MHz signal function for carrying out the analog differential orthogonal signalling of input
After orthogonal modulation, up-conversion obtain up-conversion signal, output up-conversion signal to filter；It is also used to oneself state information is defeated
Data management module is arrived out；
The interference signal that filter is used to filter out up-conversion signal obtains radiofrequency signal.
Dsp processor completes numerical calculation and signal controls: dsp processor includes data transmit-receive module, text processing mould
Block, control word computing module, signal control module and equipment condition monitoring module；
Data transmit-receive module, which is used to receive data management module according to data interface protocol, exports each instruction, the control that will be received
Signal processed generates format and modulation intelligence instruction output to text processing module, and modulation bandwidth and dynamic delay instruction are exported extremely
Control word computing module, by link setup target, modulation system, output state and watt level instruction output to signal control module；
It is also used to receiving device state monitoring module output state information and data management module output state information, according to data-interface
Status information is sent after protocol integration to data management module；
The control signal that text processing module is used to input generates format and modulation intelligence is instructed according to information frame structure
Specification, information category formatting, information define and the layout and real-time update of information injection and processing strategie completion content,
It obtains two branch textual information of I, Q and is exported respectively to data management module；
Control word computing module is used to be instructed according to the modulation bandwidth and dynamic delay of input calculates Doppler frequency in real time
Offset obtains spreading code clock control word and carrier Control word, and is exported respectively to data management module；
Link setup target, modulation system, output state and the watt level instruction that signal control module is used to input carry out
It is parsed signal control, and is exported to data management module；
Equipment condition monitoring module is for exporting the status information of input to data transmit-receive module.
The present invention realizes that signal generates using the embedded-type modularized program form of FPGA+DSP, and hardware configuration is simply easy to real
Now, flexibility is high and application's expansibility is strong, to adapt to Beidou satellite navigation system construction, can generate two kinds of signal system lattice
Formula totally four channel signals, can output signal under analog satellite real motion state, dynamic range speed ± 8000m/s adds
Speed ± 500m/s2, 700~2700MHz of rf frequency output area is supported to effectively inhibit using digital arrays
The generation of image frequency components, avoids biggish spurious components, and output power signal uses numerical control accurate attenuation.
Claims (5)
1.L frequency range uplink injection transmitting signal generating apparatus, including monitoring computer, network transmission module, dsp processor,
FPGA, D/A conversion module, radio-frequency modulations module and filter, FPGA output reset signal to dsp processor, which is characterized in that
The FPGA includes data management module, text memory module, spreading code generation module, control word memory module, time-frequency letter
Number generation module, message coding and correction verification module, band spectrum modulation module, numerically-controlled oscillator, orthogonal modulation module and signal
Switching module；
Monitoring computer for generating a variety of instructions, by each instruction by network transmission module and data management module export to
Dsp processor；Monitoring computer is also used to receive what dsp processor was sent by data management module and network transmission module
Status information；A variety of instructions include that control signal generates format, modulation intelligence, link setup target, modulation bandwidth, modulation methods
The instruction of formula, dynamic delay, output state and watt level；
Each instruction that network transmission module is used to monitor computer output is exported according to network UDP transport protocol to data management
Module；It is also used to export the status information that data management module exports to monitoring computer；
Data management module is used for each instruction that will receive and carries out that data transmit-receive differentiates management and to pass through external memory interface defeated
Out to dsp processor；It is also used to export the status information that dsp processor exports to network transmission module；It is also used to receive letter
The status information that number switching module, D/A conversion module, time frequency signal generation module and radio-frequency modulations module export respectively；
Dsp processor is used to control the finger of signal modulation information, link setup target, modulation bandwidth, modulation system and dynamic delay
Order carries out parsing corresponding generation two branch textual information of I, Q, temporal information, satellite ID, spreading code clock control word, carrier Control
Word and time and frequency standards enable signal export two branch textual information of I, Q to text memory module by data management module
It is stored, temporal information and satellite ID is exported by data management module to spreading code generation module, by spreading code clock
Control word and carrier Control word, which are exported by data management module to control word memory module, to be stored, and time and frequency standards are enabled
Signal is exported by data management module to time frequency signal generation module；Dsp processor is also used to obtain status information and passes through
Data management module and network transmission module are sent to monitoring computer；The status information includes time frequency signal generation module
Working condition, the output of signal switching module, the output of the working condition of D/A conversion module and radio-frequency modulations module；
Text memory module is used to the two branch textual information of I, Q of input being stored in respective RAM memory space respectively, and
It exports under the driving of 1PPS reference signal and text clock signal to message coding and correction verification module；
Spreading code generation module is used for according to the satellite ID and temporal information of input, control periodic spreading code generator polynomial and
No periodic nonlinear precise code module generates two branch of I, Q spread spectrum respectively under the driving of 1PPS reference signal and spreading code clock
Code information is simultaneously exported to band spectrum modulation module；
Control word memory module is stored in respective RAM storage for that will input spreading code clock control word and carrier Control word respectively
Space is simultaneously exported respectively under the driving that control word reads clock signal and 1PPS reference signal to numerically-controlled oscillator；
Time frequency signal generation module is used for spreading code clock, time and frequency standards enable signal and the reference clock 10MHz that will be inputted
With 1PPS by Time and Frequency Synchronization and frequency phase lock ring generate after frequency multiplication and scaling down processing control word read clock signal,
Control word reading clock signal is exported to control word and is stored by 1PPS reference signal, text clock signal and system work clock
Module exports 1PPS reference signal to text memory module, spreading code generation module, control word memory module, message coding
With correction verification module and numerically-controlled oscillator, text clock signal is exported to text memory module and message coding and calibration mode
Block exports system work clock to numerically-controlled oscillator, orthogonal modulation module and D/A conversion module；
Message coding and correction verification module will be for that will input two branch textual information of I, Q in 1PPS reference signal and text clock signal
Driving under complete channel coding and calculate CRC check, and export the textual information after two branch of I, Q coding to band spectrum modulation mould
Block；
Textual information after two branch spreading codes information of I, Q and two branch of I, Q coding that band spectrum modulation module is used to input exists
Digital spread spectrum operation is carried out under the driving of spreading code clock and obtains two branch spread-spectrum signal of I, Q, and is exported to orthogonal modulation module；
Spreading code clock control word, system work clock and the 1PPS reference signal that numerically-controlled oscillator is used to input are straight
Connect digital frequency synthesizer effect it is lower generate spreading code clock and export to band spectrum modulation module, spreading code generation module and when
Frequency signal generator module, carrier Control word, system work clock and 1PPS reference signal are made in Direct Digital Synthesizer
It exports with lower generation sinusoidal carrier and cosine carrier and respectively to orthogonal modulation module；
Two branch spread-spectrum signal of I, Q, sinusoidal carrier and the cosine carrier that orthogonal modulation module is used to input are in system work
After progress digital modulation obtains one phase of big-dipper satellite system signal and global system signal under the driving of clock, by one phase of big-dipper satellite
System signal and global system signal are exported respectively to signal switching module；
Signal switching module is used to one phase of the big-dipper satellite system signal of input and global system signal switching over selection, and
One of system signal is exported to D/A conversion module；It is also used to export oneself state information to data management module；
D/A conversion module is for being converted into analog differential just for the Beidou system signal of input under the driving of system work clock
After handing over signal, analog differential orthogonal signalling are exported to radio-frequency modulations module；It is also used to oneself state information being output to data
Management module；
Radio-frequency modulations module is orthogonal for carrying out the analog differential orthogonal signalling of input under reference clock 10MHz signal function
After modulation, up-conversion obtain up-conversion signal, output up-conversion signal to filter；It is also used to for oneself state information being output to
Data management module；
The interference signal that filter is used to filter out up-conversion signal obtains radiofrequency signal.
2. L frequency range uplink injection transmitting signal generating apparatus according to claim 1, it is characterised in that: the DSP processing
Device includes data transmit-receive module, text processing module, control word computing module, signal control module and equipment condition monitoring mould
Block；
Data transmit-receive module is used to receive each instruction of data management module output, the control that will be received according to data interface protocol
Signal generates format and modulation intelligence instructs output to text processing module, and modulation bandwidth and dynamic delay instruction are exported to control
Word computing module processed, by link setup target, modulation system, output state and watt level instruction output to signal control module；Also
For receiving device state monitoring module output state information and data management module output state information, assisted according to data-interface
Status information is sent after view integration to data management module；
Text processing module be used for the control signal that will input generate format and modulation intelligence instruct according to information frame specification for structure,
Information category formatting, information define and the layout and real-time update of information injection and processing strategie completion content, obtains
I, it two branch textual information of Q and is exported respectively to data management module；
Control word computing module is used to be instructed according to the modulation bandwidth and dynamic delay of input calculates Doppler shift in real time
Spreading code clock control word and carrier Control word are obtained, and is exported respectively to data management module；
Signal control module is used to parse the instruction of the link setup target of input, modulation system, output state and watt level
Signal control is completed, and is exported to data management module；
Equipment condition monitoring module is for exporting the status information of input to data transmit-receive module.
3. L frequency range uplink injection transmitting signal generating apparatus according to claim 1 or 2, it is characterised in that: message coding
It is encoded and is verified using Turbo coding, LDPC coding and CRC check generator polynomial with correction verification module.
4. L frequency range uplink injection transmitting signal generating apparatus according to claim 1 or 2, it is characterised in that: band spectrum modulation
Module carries out band spectrum modulation using the two addend word arithmetic of binary system mould.
5. L frequency range uplink injection transmitting signal generating apparatus according to claim 1 or 2, it is characterised in that: orthogonal modulation
Module carries out orthogonal modulation using binary phase shift keying and quadrature phase shift keying.
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| CN102131129A (en) * | 2010-04-28 | 2011-07-20 | 华为技术有限公司 | Method, device and system for receiving uplink signal in passive optical network (PON) |
| CN103383460A (en) * | 2012-05-02 | 2013-11-06 | 中国人民解放军国防科学技术大学 | High-accuracy high-dynamic uplink injection signal generating method |
| CN103792552A (en) * | 2014-03-11 | 2014-05-14 | 北京华力创通科技股份有限公司 | System and method for generating satellite navigation baseband signal |
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| US9151843B2 (en) * | 2011-10-28 | 2015-10-06 | Maxlinear, Inc. | Method and system for indoor global navigation satellite system detection utilizing low-earth orbit satellite signals |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102131129A (en) * | 2010-04-28 | 2011-07-20 | 华为技术有限公司 | Method, device and system for receiving uplink signal in passive optical network (PON) |
| CN103383460A (en) * | 2012-05-02 | 2013-11-06 | 中国人民解放军国防科学技术大学 | High-accuracy high-dynamic uplink injection signal generating method |
| CN103792552A (en) * | 2014-03-11 | 2014-05-14 | 北京华力创通科技股份有限公司 | System and method for generating satellite navigation baseband signal |
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