CN109639609B - Multi-rate multi-modulation mode commercial data transmission transmitting device based on CCSDS transmission structure - Google Patents
Multi-rate multi-modulation mode commercial data transmission transmitting device based on CCSDS transmission structure Download PDFInfo
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- CN109639609B CN109639609B CN201811545884.3A CN201811545884A CN109639609B CN 109639609 B CN109639609 B CN 109639609B CN 201811545884 A CN201811545884 A CN 201811545884A CN 109639609 B CN109639609 B CN 109639609B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
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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
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18582—Arrangements for data linking, i.e. for data framing, for error recovery, for multiple access
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Abstract
The invention discloses a multi-rate multi-modulation mode commercial data transmission transmitting device based on a CCSDS (consultative committee for space data system) transmission structure, which comprises a clock management module, a control module, a data receiving module, an encoding module, a CCSDS framing module, a mapping module, a forming filtering module, a digital up-conversion module and a parallel amplitude adjusting module. The invention is divided into three systems: clock system, control system and data processing system. The clock system is completed by a clock management module and is used for providing a clock. The control system is completed by the control module and is used for controlling. The data processing system firstly identifies and receives baseband input data by the interface management module, the received data is sent to the coding module to be coded under the control of the control signal, and then framing, mapping module, forming filtering and digital up-conversion processing are carried out. The invention has the advantages of universal frame structure, flexible data processing, good portability and the like. The method is particularly suitable for civil satellite-borne data transmission under various environmental conditions and various different types of data communication.
Description
Technical Field
The invention can provide data transmission with high, medium and low rates for users with different platforms and different purposes, and can select a proper modulation mode according to the channel condition. The multi-rate multi-modulation mode commercial data transmission transmitting device based on the CCSDS transmission structure is realized by using a parallel processing idea and a packet coding technology, and transmission is carried out based on a standard CCSDS frame structure, so that the transmission capability is improved to the greatest extent on the existing hardware platform, and the anti-interference capability of signals is improved.
Background
With the increasing data volume of images and videos collected by satellites and the short working time of low-orbit satellites, the transmission rate of the satellites is required to be increased, and under the condition of effectively improving the bandwidth utilization rate and the anti-interference capacity, the commercial data transmission transmitting device based on the CCSDS transmission structure and adopting a multi-rate multi-modulation mode realizes high-gain, high-rate, large-bandwidth, multi-mode and high-efficiency communication by using a high-speed interface bus technology, a variable-rate technology, a high-order modulation technology, a packet coding technology and a parallel processing technology.
Disclosure of Invention
The invention aims to avoid the defects in the background technology, and the multi-rate multi-modulation mode commercial data transmission transmitting device based on the CCSDS transmission structure can solve the defects. The invention has the advantages of various transmission rates, selectable modulation modes, high-speed safety of data interfaces, good portability and the like. The method is particularly suitable for satellite-ground data transmission devices.
The purpose of the invention is realized as follows:
the commercial data transmission transmitting device based on the CCSDS transmission structure and adopting the multi-rate multi-modulation mode comprises a clock management module 1, a control module 2, a data receiving module 3, an encoding module 4, a CCSDS framing module 5, a mapping module 6 and a forming filtering module 7, and further comprises a digital up-conversion module 8 and a parallel amplitude adjusting module 9;
the clock management module 1 receives a clock signal, generates a multi-path clock, and respectively outputs the multi-path clock to the control module 2, the data receiving module 3, the coding module 4, the CCSDS framing module 5, the mapping module 6, the shaping filtering module 7, the digital up-conversion module 8 and the parallel amplitude adjusting module 9; the control module 2 receives the instruction signal, analyzes various control instructions, and respectively outputs the control instructions to the data receiving module 3, the coding module 4, the CCSDS framing module 5, the mapping module 6 and the shaping and filtering module 7; the data receiving module 3 receives the baseband signal, stores the baseband signal according to the control instruction sent by the control module 2, and forwards the baseband signal to the encoding module 4; the encoding module 4 encodes the baseband signal according to the control instruction sent by the control module 2 and outputs the encoded data to the CCSDS framing module 5; the CCSDS framing module 5 frames the coded data according to the control instruction sent by the control module 2 and outputs the framed data to the mapping module 6; the mapping module 6 receives the framing data, performs QPSK, 8PSK and 16QAM mapping quantization on the framing data according to the control command sent by the control module 2, and outputs the data after mapping quantization to the forming filtering module 7; the shaping filtering module 7 carries out signal shaping of five carrier wave rates of 300Msps, 150Msps, 75Msps, 37.5Msps and 18.75Msps on the data after mapping quantization according to a control command sent by the control module 2, and outputs the shaped data to the digital up-conversion module 8; the digital up-conversion module 8 receives the forming data, generates up-conversion data and outputs the up-conversion data to the parallel amplitude adjustment module 9; the parallel amplitude adjustment module 9 performs amplitude adjustment on the up-conversion data and outputs a digital intermediate frequency signal.
The digital up-conversion module 8 comprises an NCO control module 8-1, a frequency table module 8-2 and an orthogonal frequency conversion module 8-3;
the NCO control module 8-1, the frequency table module 8-2 and the orthogonal frequency conversion module 8-3 work under a clock signal sent by the clock management module 1; the NCO control module 8-1 generates a control signal of a frequency table and outputs the control signal to the frequency table module 8-2; the frequency table module 8-2 receives the control signal of the frequency table sent by the NCO control module 8-1, generates single carrier data without stray, and outputs the single carrier data to the orthogonal frequency conversion module 8-3; the orthogonal frequency conversion module 8-3 receives the shaping data sent by the shaping filtering module 7 and the single carrier data sent by the frequency table module 8-2, and performs orthogonal operation on the two data to generate up-conversion data and output the up-conversion data to the parallel amplitude adjustment module 9.
The parallel amplitude adjusting module 9 comprises a parallel control module 9-1, a parallel data processing module 9-2 and a parallel amplitude filtering module 9-3;
the parallel control module 9-1, the parallel data processing module 9-2 and the parallel amplitude filtering module 9-3 work under the clock signal sent by the clock management module 1; the parallel control module 9-1 receives the up-conversion data sent by the up-conversion module 8, generates parallel data with control information and outputs the parallel data to the parallel data processing module 9-2; the parallel data processing module 9-2 carries out conversion processing of a parallel filter on the parallel data to enable the parallel data to adapt to parallel filtering, generates parallel processing data and outputs the parallel processing data to the parallel amplitude filtering module 9-3; the parallel amplitude filtering module 9-3 receives the parallel processing data, performs parallel convolution filtering operation on the parallel processing data, and generates and outputs a digital intermediate frequency signal.
Compared with the background technology, the invention has the following advantages:
1. the invention can complete the data receiving of the highest 1.2Gbps, can complete the data sending of five carrier wave rates of 300Msps, 150Msps, 75Msps, 37.5Msps and 18.75Msps, can complete the selection of three modulation modes of QPSK, 8PSK and 16QAM, and simultaneously scrambles and encodes the data and frames the data according to the CCSDS frame structure for outputting, and has simple protocol and strong adaptability.
2. The invention adopts the form of block code to encode uncoded data, improves gain under the condition of ensuring transmission efficiency, can adapt to different requirements of users, sends corresponding bandwidth information according to different use environment requirements, and can improve the availability and transmission efficiency of a transmission link.
The components of the invention are made of large-scale field programmable devices, and the invention has the advantages of simple hardware circuit, small volume, low cost, stable and reliable performance and the like, and has strong usability in engineering.
Drawings
FIG. 1 is an electrical schematic of an embodiment of the invention.
Fig. 2 is an electrical schematic of an embodiment of a digital up-conversion module.
Fig. 3 is an electrical schematic of an embodiment of a parallel amplitude adjustment module.
Detailed Description
Referring to fig. 1, the multi-rate multi-modulation mode commercial data transmission transmitting device based on the CCSDS transmission structure of the present invention includes a clock management module 1, a control module 2, a data receiving module 3, an encoding module 4, a CCSDS framing module 5, a mapping module 6, a shaping filtering module 7, a digital up-conversion module 8, and a parallel amplitude adjustment module 9, fig. 1 is an electrical schematic diagram of an embodiment of the multi-rate multi-modulation mode commercial data transmission transmitting device based on the CCSDS transmission structure of the present invention, and the embodiment connects lines according to fig. 1.
The clock management module 1 receives clock signals, generates various clocks, and sends the clocks to the control module 2, the data receiving module 3, the coding module 4, the CCSDS framing module 5, the mapping module 6, the shaping filtering module 7, the digital up-conversion module 8 and the parallel amplitude adjusting module 9; the control module 2 receives the instruction signal, analyzes various control instructions, and sends the control instructions to the data receiving module 3, the coding module 4, the CCSDS framing module 5, the mapping module 6 and the shaping filtering module 7; the data receiving module 3 receives the baseband signal, stores and forwards the baseband signal according to the control instruction sent by the control module 2, and forwards the baseband signal to the encoding module 4; the coding module 4 receives the data sent by the data receiving module 3, codes the data, and sends the coded data to the CCSDS framing module 5; the CCSDS framing module 5 receives the coded data sent by the coding module 4, frames the coded data according to the control instruction sent by the control module 2, and then sends the framed data to the mapping module 6; the mapping module 6 receives the framing data, performs QPSK, 8PSK and 16QAM mapping quantization on the framing data according to the control command sent by the control module 2, and then sends the mapped and quantized data to the forming filtering module 7; the shaping filtering module 7 receives the mapping quantization data, carries out signal shaping of five carrier wave rates of 300Msps, 150Msps, 75Msps, 37.5Msps and 18.75Msps on the mapping quantization data according to a control command sent by the control module 2, and then sends the shaped data to the digital up-conversion module 8; the digital up-conversion module 8 receives the forming data, generates frequency band data and sends the frequency band data to the parallel amplitude adjustment module 9, the parallel amplitude adjustment module 9 adjusts the amplitude of the frequency band signal sent by the digital up-conversion module 8, and then outputs the signal after the amplitude adjustment.
The digital up-conversion module 8 comprises an NCO control module 8-1, a frequency table module 8-2 and an orthogonal frequency conversion module 8-3; the NCO control module 8-1, the frequency table module 8-2 and the orthogonal frequency conversion module 8-3 work under the clock signal sent by the clock management module 1; the NCO control module 8-1 generates a control signal of a frequency meter and sends the control signal to the frequency meter module 8-2; receiving a control signal of the frequency table sent by the NCO control module 8-1, generating single carrier data without stray, and sending the single carrier data to the orthogonal frequency conversion module 8-3; the orthogonal frequency conversion module 3-3 receives the shaping data sent by the shaping filtering module 7 and the single carrier data sent by the frequency table module 8-2, and carries out orthogonal operation on the two data to generate up-conversion data and sends the up-conversion data to the parallel amplitude adjustment module 9.
The parallel amplitude adjusting module 9 comprises a parallel control module 9-1, a parallel data processing module 9-2 and a parallel amplitude filtering module 9-3; the parallel control module 9-1, the parallel data processing module 9-2 and the parallel amplitude filtering module 9-3 work under the clock signal sent by the clock management module 1; the parallel control module 9-1 receives the up-conversion data sent by the up-conversion module 8, generates parallel data with control information and sends the parallel data to the parallel data processing module 9-2; the parallel data processing module 9-2 carries out conversion processing of a parallel filter on the parallel data to enable the parallel data to adapt to parallel filtering, and generates parallel processing data to be sent to the parallel amplitude filtering module 9-3; the parallel amplitude filtering module 9-3 receives the parallel processing data, performs parallel convolution filtering operation on the parallel processing data, generates frequency domain data and sends the frequency domain data.
In the embodiment, each functional module can be realized on an FPGA series product XC5VFX130T model produced by Xilinx original factories.
The invention has the following brief working principle:
the clock management module 1 of the commercial data transmission transmitting device based on the multi-rate multi-modulation mode of the CCSDS transmission structure receives clock signals, generates various clocks, and sends the clocks to the control module 2, the data receiving module 3, the coding module 4, the CCSDS framing module 5, the mapping module 6, the shaping filtering module 7, the digital up-conversion module 8 and the parallel amplitude adjusting module 9; the control module 2 receives the instruction signal, analyzes various control instructions, and sends the control instructions to the data receiving module 3, the coding module 4, the CCSDS framing module 5, the mapping module 6 and the shaping filtering module 7; the data receiving module 3 receives the baseband signal, stores and forwards the baseband signal according to the control instruction sent by the control module 2, and forwards the baseband signal to the encoding module 4; the coding module 4 receives the data sent by the data receiving module 3, codes the data, and sends the coded data to the CCSDS framing module 5; the CCSDS framing module 5 receives the coded data sent by the coding module 4, frames the coded data according to the control instruction sent by the control module 2, and then sends the framed data to the mapping module 6; the mapping module 6 receives the framing data, performs QPSK, 8PSK and 16QAM mapping quantization on the framing data according to the control command sent by the control module 2, and then sends the mapped and quantized data to the forming filtering module 7; the shaping filtering module 7 receives the mapping quantization data, carries out signal shaping of five carrier wave rates of 300Msps, 150Msps, 75Msps, 37.5Msps and 18.75Msps on the mapping quantization data according to a control command sent by the control module 2, and then sends the shaped data to the digital up-conversion module 8; the digital up-conversion module 8 receives the forming data, generates frequency band data and sends the frequency band data to the parallel amplitude adjustment module 9, the parallel amplitude adjustment module 9 adjusts the amplitude of the frequency band signal sent by the digital up-conversion module 8, then outputs the signal after the amplitude adjustment to the DAC device for analog forming, and finally converts the signal into a C-band intermediate frequency signal for output.
Claims (3)
1. Commercial data transmission transmitting device of multirate multiple modulation mode based on CCSDS transmission structure, including clock management module (1), control module (2), receive data module (3), coding module (4), CCSDS framing module (5), mapping module (6) and shaping filtering module (7), its characterized in that: the device also comprises a digital up-conversion module (8) and a parallel amplitude adjustment module (9);
the clock management module (1) receives a clock signal, generates a multi-path clock, and respectively outputs the multi-path clock to the control module (2), the data receiving module (3), the coding module (4), the CCSDS framing module (5), the mapping module (6), the shaping filtering module (7), the digital up-conversion module (8) and the parallel amplitude adjusting module (9); the control module (2) receives the instruction signals, analyzes various control instructions, and respectively outputs the control instructions to the data receiving module (3), the coding module (4), the CCSDS framing module (5), the mapping module (6) and the shaping and filtering module (7); the data receiving module (3) receives the baseband signal, stores the baseband signal according to the control instruction sent by the control module (2), and forwards the baseband signal to the coding module (4); the encoding module (4) encodes the baseband signal according to the control instruction sent by the control module (2) and outputs the encoded data to the CCSDS framing module (5); the CCSDS framing module (5) frames the coded data according to the control instruction sent by the control module (2) and outputs the framed data to the mapping module (6); the mapping module (6) receives the framing data, performs QPSK, 8PSK and 16QAM mapping quantization on the framing data according to the control command sent by the control module (2), and outputs the data after mapping quantization to the shaping filtering module (7); the shaping filtering module (7) carries out signal shaping of five carrier wave rates of 300Msps, 150Msps, 75Msps, 37.5Msps and 18.75Msps on the mapping quantized data according to a control command sent by the control module (2), and outputs the shaped data to the digital up-conversion module (8); the digital up-conversion module (8) receives the forming data, generates up-conversion data and outputs the up-conversion data to the parallel amplitude adjustment module (9); and the parallel amplitude adjusting module (9) adjusts the amplitude of the up-conversion data and outputs a digital intermediate frequency signal.
2. The multi-rate multi-modulation format commercial data transmission transmitting device based on the CCSDS transmission structure of claim 1, wherein: the digital up-conversion module (8) comprises an NCO control module (8-1), a frequency table module (8-2) and an orthogonal frequency conversion module (8-3);
the NCO control module (8-1), the frequency table module (8-2) and the orthogonal frequency conversion module (8-3) work under a clock signal sent by the clock management module (1); an NCO control module (8-1) generates a control signal of a frequency table and outputs the control signal to a frequency table module (8-2); the frequency table module (8-2) receives the control signal of the frequency table sent by the NCO control module (8-1), generates single carrier data without stray, and outputs the single carrier data to the orthogonal frequency conversion module (8-3); and the orthogonal frequency conversion module (8-3) receives the shaping data sent by the shaping filtering module (7) and the single-carrier data sent by the frequency table module (8-2), performs orthogonal operation on the two types of data, generates up-conversion data and outputs the up-conversion data to the parallel amplitude adjustment module (9).
3. The multi-rate multi-modulation format commercial data transmission transmitting device based on the CCSDS transmission structure of claim 1, wherein: the parallel amplitude adjusting module (9) comprises a parallel control module (9-1), a parallel data processing module (9-2) and a parallel amplitude filtering module (9-3);
the parallel control module (9-1), the parallel data processing module (9-2) and the parallel amplitude filtering module (9-3) work under the clock signal sent by the clock management module (1); the parallel control module (9-1) receives the up-conversion data sent by the up-conversion module (8), generates parallel data with control information and outputs the parallel data to the parallel data processing module (9-2); the parallel data processing module (9-2) carries out conversion processing of a parallel filter on the parallel data to enable the parallel data to adapt to parallel filtering, generates parallel processing data and outputs the parallel processing data to the parallel amplitude filtering module (9-3); the parallel amplitude filtering module (9-3) receives the parallel processing data, performs parallel convolution filtering operation on the parallel processing data, and generates and outputs a digital intermediate frequency signal.
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| CN110492975B (en) * | 2019-08-27 | 2022-03-18 | 上海航天测控通信研究所 | Coded modulator for spaceflight |
| CN113726406B (en) * | 2021-08-25 | 2022-06-21 | 中国电子科技集团公司第五十四研究所 | Multi-rate Ku communication transmitting device with variable frequency points based on block coding |
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