CN107332605B - Measurement and control method based on Ka-S frequency band relay integrated measurement and control system - Google Patents
Measurement and control method based on Ka-S frequency band relay integrated measurement and control system Download PDFInfo
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- CN107332605B CN107332605B CN201710479032.8A CN201710479032A CN107332605B CN 107332605 B CN107332605 B CN 107332605B CN 201710479032 A CN201710479032 A CN 201710479032A CN 107332605 B CN107332605 B CN 107332605B
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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
- H04B7/18502—Airborne stations
- H04B7/18504—Aircraft used as relay or high altitude atmospheric platform
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
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Abstract
The invention provides a measurement and control method based on a Ka-S frequency band relay integrated measurement and control system, which comprises two communication links of S frequency band relay measurement and control and Ka frequency band relay measurement and control, wherein the relays of the two frequency bands adopt an integrated association design technology; the S frequency band relay measurement and control communication link adopts a wide beam antenna to transmit and receive antenna-to-ground array, so that wide beam coverage is realized; the Ka frequency band relay measurement and control communication link adopts a phased array antenna, so that the Ka relay link is quickly tracked and maintained under the condition that the attitude of the platform continuously changes, and the antenna-to-ground array is received and transmitted to realize wide beam coverage. The invention solves the problems of lower communication rate of relay measurement and control by singly using the S frequency band, small real-time coverage range of relay measurement and control by singly using the Ka frequency band and lower efficiency of the relay measurement and control in two forms.
Description
Technical Field
The invention belongs to the technical field of aircraft measurement and control communication, and particularly relates to a measurement and control method based on a Ka-S frequency band relay integrated measurement and control system.
Background
With the development of the measurement and control communication technology of the spacecraft, relay measurement and control are applied to the spacecraft, and currently, the relay measurement and control adopted by the spacecraft are S frequency bands and Ka frequency bands. The S-band relay measurement and control mainly adopts a fixed beam antenna to realize low-speed wide-coverage communication. The Ka frequency range relay measurement and control mainly adopts a parabolic antenna with mechanical servo to realize high-speed communication.
The existing aircraft only adopts S frequency band relay measurement and control, and cannot realize high-speed communication; some relay measurement and control only adopt Ka frequency band, can't realize the real-time wide beam to cover; the relay measurement and control in the two existing forms are independently arranged and are not related to each other, so that the resource waste is realized, and the efficiency is lower.
Disclosure of Invention
In order to solve the problems, the invention provides a measurement and control method based on a Ka-S frequency band relay integrated measurement and control system, which comprises two communication links of S frequency band relay measurement and control and Ka frequency band relay measurement and control, wherein the relays of the two frequency bands adopt an integrated association design technology; the S frequency band relay measurement and control communication link adopts a wide beam antenna to transmit and receive antenna-to-ground array, so that wide beam coverage is realized; the Ka frequency band relay measurement and control communication link adopts a phased array antenna, so that the Ka relay link is quickly tracked and maintained under the condition that the attitude of the platform continuously changes, and the antenna-to-ground array is received and transmitted to realize wide beam coverage. The invention solves the problems of lower communication rate of relay measurement and control by singly using the S frequency band, small real-time coverage range of relay measurement and control by singly using the Ka frequency band and lower efficiency of the relay measurement and control in two forms.
A measurement and control method based on a Ka-S frequency band relay integrated measurement and control system comprises a Ka frequency band phased array antenna, a relay measurement and control terminal, a ground S receiving antenna, a skyhook S receiving antenna, a ground S transmitting antenna and a skyhook S transmitting antenna;
the measurement and control method is divided into a forward measurement and control communication link mode and a return measurement and control communication link mode, wherein the measurement and control method of the forward measurement and control communication link mode comprises the following steps:
the relay satellite forwards an S-frequency band forward remote control signal sent by the ground command center to the ground S receiving antenna and the sky S receiving antenna, and the ground S receiving antenna and the sky S receiving antenna send the S-frequency band forward remote control signal received in real time to the relay measurement and control terminal;
the relay measurement and control terminal generates a remote control instruction a according to the two S frequency band forward remote control signals and then sends the remote control instruction a to the aircraft platform so as to control the aircraft platform;
meanwhile, the relay satellite forwards a Ka frequency band forward remote control signal sent by the ground command center to the Ka frequency band phased array antenna, and the relay measurement and control terminal controls whether the Ka frequency band phased array antenna is started or not according to a remote control instruction a: if the relay terminal is started, the Ka frequency band phased array antenna sends the received Ka frequency band forward remote control signal to the relay measurement and control terminal;
the relay measurement and control terminal generates a remote control instruction b according to the Ka frequency band forward remote control signal and then sends the remote control instruction b to the aircraft platform so as to control the aircraft platform;
if the relay measurement and control terminal generates a remote control command a and a remote control command b at the same time, the relay measurement and control terminal selects one path of remote control command to control the aircraft platform according to the set priority;
the measurement and control method of the return measurement and control communication link mode comprises the following steps:
the relay measurement and control terminal receives the telemetering data of the aircraft platform, simultaneously acquires the telemetering data generated by the relay measurement and control terminal and the telemetering data of the Ka frequency band phased array antenna, and generates low-speed telemetering data and high-speed telemetering data according to the three telemetering data;
and the ground command center controls whether the Ka frequency band phased array antenna is started or not according to the low-speed telemetering data: if the system is started, the Ka frequency band phased array antenna transmits the high-speed telemetering data to the relay satellite, and finally the relay satellite forwards the high-speed telemetering data to the ground command center;
meanwhile, the relay measurement and control terminal sends the low-speed telemetering data to a ground S transmitting antenna and a skyward S transmitting antenna, the low-speed telemetering data are further transmitted to the relay satellite, and finally the relay satellite forwards the low-speed telemetering data to the ground command center.
Furthermore, the relay measurement and control terminal is always in a working state and comprises a Ka baseband module, a Ka radio frequency receiving module, a Ka radio frequency transmitting module, an S baseband module, an S radio frequency receiving module and an S radio frequency transmitting module;
the relay measurement and control terminal generates a remote control instruction a according to the two S frequency band forward remote control signals and then sends the remote control instruction a to the aircraft platform, and the method specifically comprises the following steps:
step 1-1: the S radio frequency receiving module synthesizes the received two S frequency band forward remote control signals into one signal, and sequentially carries out filtering, low-noise amplification, down-conversion, intermediate frequency filtering and AGC (automatic gain control) amplification on the signal to obtain an intermediate frequency signal;
step 1-2: the S baseband module receives the intermediate frequency signal output by the S radio frequency receiving module, carries out AD sampling on the intermediate frequency signal, sends the signal subjected to AD sampling into the S baseband module to be sequentially subjected to capturing, tracking, bit synchronization, demodulation and decoding to obtain a remote control command a, and finally transmits the remote control command a to the aircraft platform through a self remote control 422 interface;
the relay measurement and control terminal controls whether the Ka frequency band phased array antenna is started or not according to the remote control instruction a, and the method comprises the following specific steps:
step 2-1: the Ka baseband module receives a remote control command a obtained by decoding the S baseband module and controls whether the Ka frequency band phased array antenna is started or not according to the remote control command a; if the remote control command a is effective, the Ka frequency band phased array antenna is started, and if the remote control command a is ineffective, the Ka frequency band phased array antenna is not started;
the relay measurement and control terminal generates a remote control instruction b according to the Ka frequency band forward remote control signal and then sends the remote control instruction b to the aircraft platform, and the method specifically comprises the following steps:
step 3-1: the Ka radio frequency receiving module sequentially carries out filtering, low-noise amplification, down-conversion, intermediate frequency filtering and AGC (automatic gain control) amplification on the received Ka frequency band forward remote control signal to obtain an intermediate frequency signal;
step 3-2: the Ka baseband module receives the intermediate frequency signal output by the Ka radio frequency receiving module, carries out AD sampling on the intermediate frequency signal, sends the AD sampled signal into the Ka baseband module to be sequentially captured, tracked, bit synchronized, demodulated and decoded to obtain a remote control command b, and finally sends the remote control command b to the S baseband module, and the S baseband module sends the remote control command b to the aircraft platform through a self remote control 422 interface;
the relay measurement and control terminal receives the telemetering data of the aircraft platform, simultaneously acquires the telemetering data generated by the relay measurement and control terminal and the telemetering data of the Ka frequency band phased array antenna, and generates low-speed telemetering data and high-speed telemetering data according to the three telemetering data, and the specific steps are as follows:
step 4-1: the Ka baseband module receives telemetry data transmitted by the aircraft platform through a telemetry 422 interface of the Ka baseband module, and then frames, codes and forms and filters the three types of telemetry data to obtain high-speed telemetry data; then, the Ka baseband module extracts the telemetry data of the aircraft platform and the telemetry data of the Ka baseband module from the high-speed telemetry data, forms the 2 telemetry data into low-speed telemetry data and transmits the low-speed telemetry data to the S baseband module;
the ground command center controls whether the Ka frequency band phased array antenna is started or not according to the low-speed telemetering data so as to transmit the high-speed telemetering data to the relay satellite, and the method specifically comprises the following steps:
step 5-1: the Ka radio frequency transmitting module receives the high-speed telemetering data output by the Ka baseband module, sequentially carries out carrier modulation, small signal amplification and filtering on the high-speed telemetering data, and then transmits the filtered high-speed telemetering data to the Ka frequency band phased array antenna; meanwhile, the ground command center generates a corresponding control instruction according to the low-speed telemetering data and the preset corresponding relation between the low-speed telemetering data and the control instruction in the step 4-1, so that whether the Ka-band phased array antenna is started or not is controlled, if the control instruction is effective, the Ka-band phased array antenna is started, and the Ka-band phased array antenna transmits the filtered high-speed telemetering data to the relay satellite; if the control command is invalid, the Ka frequency band phased array antenna keeps a power-off state;
the relay measurement and control terminal sends the low-speed telemetering data to a ground S transmitting antenna and a skyward S transmitting antenna, and then transmits the low-speed telemetering data to a relay satellite, and the specific steps are as follows:
step 6-1: the S baseband module receives low-speed telemetering data output by the Ka baseband module in real time;
step 6-2: the S baseband module sequentially performs framing, coding and spread spectrum modulation on the low-speed telemetering data and then transmits the data after spread spectrum modulation to the S radio frequency transmitting module; and the S radio frequency transmitting module performs up-conversion, amplification and filtering on the received data, outputs the data to the ground S transmitting antenna and the skyward S transmitting antenna, and transmits the data to the relay satellite.
Further, the transmission rate of the high-speed telemetry data in the step 4-1 is Mbps, and the transmission rate of the low-speed telemetry data is kbps.
Furthermore, the Ka frequency band phased array antenna, the ground-to-S receiving antenna, the skyward-S receiving antenna, the ground-to-S transmitting antenna and the skyward-S transmitting antenna are connected with the relay measurement and control terminal through radio frequency cables.
Further, the remote control command b in the step 3-2 and the low-speed telemetry data in the step 4-1 are transmitted to the S baseband module through an internal bus.
Further, the ground S receiving antenna and the sky S receiving antenna are fixed wide beam antenna arrays.
Further, the measurement and control method based on the Ka-S frequency band relay integrated measurement and control system is characterized by further comprising an S power module and a Ka power module, wherein the Ka power module provides electric energy for the Ka baseband module, the Ka radio frequency receiving module and the Ka radio frequency transmitting module, and the S power module provides electric energy for the S baseband module, the S radio frequency receiving module and the S radio frequency transmitting module.
Further, the measurement and control method based on the Ka-S frequency band relay integrated measurement and control system is characterized in that the capturing, tracking, bit synchronization, demodulation and decoding operations in the step 1-2 and the step 3-2 are respectively completed in baseband signal processing units (FPGA) in an S baseband module and a Ka baseband module.
Has the advantages that:
according to the invention, a Ka-S multi-band relay integrated design technology is adopted, global real-time continuous measurement and control of a wide beam of an S frequency band of an aircraft and high-code-rate long-time data transmission of the Ka frequency band are realized, a section antenna is adopted in a traditional Ka frequency band relay measurement and control communication link, and the section antenna is driven by a motor to generate mechanical motion so as to realize beam switching; in addition, the invention improves the efficiency and reliability of the aircraft platform measurement and control through the Ka-S frequency band relay association design, and also solves the problems of lower communication rate when the S frequency band relay measurement and control is singly used, small real-time coverage range when the Ka frequency band relay measurement and control is singly used, and lower non-association efficiency of the two relay measurement and control modes in the aircraft platform relay measurement and control.
Drawings
FIG. 1 is a schematic diagram of the Ka-S multi-band relay integrated measurement and control system of the present invention.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
As shown in fig. 1, a schematic diagram of a Ka-S multi-band relay integrated measurement and control system of the present invention, a measurement and control method based on a Ka-S band relay integrated measurement and control system, the measurement and control system includes a Ka band phased array antenna, a relay measurement and control terminal, an S receiving antenna for ground, an S receiving antenna for sky, an S transmitting antenna for ground, and an S transmitting antenna for sky;
the measurement and control method is divided into a forward measurement and control communication link mode and a return measurement and control communication link mode, wherein the measurement and control method of the forward measurement and control communication link mode comprises the following steps:
the relay satellite forwards an S-frequency band forward remote control signal sent by the ground command center to the ground S receiving antenna and the sky S receiving antenna, and the ground S receiving antenna and the sky S receiving antenna send the S-frequency band forward remote control signal received in real time to the relay measurement and control terminal;
the relay measurement and control terminal generates a remote control instruction a according to the two S frequency band forward remote control signals and then sends the remote control instruction a to the aircraft platform so as to control the aircraft platform;
meanwhile, the relay satellite forwards a Ka frequency band forward remote control signal sent by the ground command center to the Ka frequency band phased array antenna, and the relay measurement and control terminal controls whether the Ka frequency band phased array antenna is started or not according to a remote control instruction a: if the relay terminal is started, the Ka frequency band phased array antenna sends the received Ka frequency band forward remote control signal to the relay measurement and control terminal;
the relay measurement and control terminal generates a remote control instruction b according to the Ka frequency band forward remote control signal and then sends the remote control instruction b to the aircraft platform so as to control the aircraft platform;
if the relay measurement and control terminal generates a remote control command a and a remote control command b at the same time, the relay measurement and control terminal selects one path of remote control command to control the aircraft platform according to the set priority;
the measurement and control method of the return measurement and control communication link mode comprises the following steps:
the relay measurement and control terminal receives the telemetering data of the aircraft platform, simultaneously acquires the telemetering data generated by the relay measurement and control terminal and the telemetering data of the Ka frequency band phased array antenna, and generates low-speed telemetering data and high-speed telemetering data according to the three telemetering data; the remote measuring data of the Ka frequency band phased array antenna are received from the Ka baseband module in real time;
and the ground command center controls whether the Ka frequency band phased array antenna is started or not according to the low-speed telemetering data: if the system is started, the Ka frequency band phased array antenna transmits the high-speed telemetering data to the relay satellite, and finally the relay satellite forwards the high-speed telemetering data to the ground command center;
meanwhile, the relay measurement and control terminal sends the low-speed telemetering data to a ground S transmitting antenna and a skyward S transmitting antenna, the low-speed telemetering data are further transmitted to the relay satellite, and finally the relay satellite forwards the low-speed telemetering data to the ground command center.
Furthermore, the relay measurement and control terminal is always in a working state and comprises a Ka baseband module, a Ka radio frequency receiving module, a Ka radio frequency transmitting module, an S baseband module, an S radio frequency receiving module and an S radio frequency transmitting module;
the relay measurement and control terminal generates a remote control instruction a according to the two S frequency band forward remote control signals and then sends the remote control instruction a to the aircraft platform, and the method specifically comprises the following steps:
step 1-1: the S radio frequency receiving module synthesizes the received two S frequency band forward remote control signals into one signal, and sequentially carries out filtering, low-noise amplification, down-conversion, intermediate frequency filtering and AGC (automatic gain control) amplification on the signal to obtain an intermediate frequency signal;
step 1-2: the S baseband module receives the intermediate frequency signal output by the S radio frequency receiving module, carries out AD sampling on the intermediate frequency signal, sends the signal subjected to AD sampling into the S baseband module to be sequentially subjected to capturing, tracking, bit synchronization, demodulation and decoding to obtain a remote control command a, and finally transmits the remote control command a to the aircraft platform through a self remote control 422 interface;
the relay measurement and control terminal controls whether the Ka frequency band phased array antenna is started or not according to the remote control instruction a, and the method comprises the following specific steps:
step 2-1: the Ka baseband module receives a remote control command a obtained by decoding the S baseband module and controls whether the Ka frequency band phased array antenna is started or not according to the remote control command a; if the remote control command a is effective, the Ka frequency band phased array antenna is started, and if the remote control command a is ineffective, the Ka frequency band phased array antenna is not started;
the relay measurement and control terminal generates a remote control instruction b according to the Ka frequency band forward remote control signal and then sends the remote control instruction b to the aircraft platform, and the method specifically comprises the following steps:
step 3-1: the Ka radio frequency receiving module sequentially carries out filtering, low-noise amplification, down-conversion, intermediate frequency filtering and AGC (automatic gain control) amplification on the received Ka frequency band forward remote control signal to obtain an intermediate frequency signal;
step 3-2: the Ka baseband module receives the intermediate frequency signal output by the Ka radio frequency receiving module, carries out AD sampling on the intermediate frequency signal, sends the AD sampled signal into the Ka baseband module to be sequentially captured, tracked, bit synchronized, demodulated and decoded to obtain a remote control command b, and finally sends the remote control command b to the S baseband module, and the S baseband module sends the remote control command b to the aircraft platform through a self remote control 422 interface;
the relay measurement and control terminal receives the telemetering data of the aircraft platform, simultaneously acquires the telemetering data generated by the relay measurement and control terminal and the telemetering data of the Ka frequency band phased array antenna, and generates low-speed telemetering data and high-speed telemetering data according to the three telemetering data, and the specific steps are as follows:
step 4-1: the Ka baseband module receives telemetry data transmitted by the aircraft platform through a telemetry 422 interface of the Ka baseband module, and then frames, codes and forms and filters the three types of telemetry data to obtain high-speed telemetry data; then, the Ka baseband module extracts the telemetry data of the aircraft platform and the telemetry data of the Ka baseband module from the high-speed telemetry data, forms the 2 telemetry data into low-speed telemetry data and transmits the low-speed telemetry data to the S baseband module;
the ground command center controls whether the Ka frequency band phased array antenna is started or not according to the low-speed telemetering data so as to transmit the high-speed telemetering data to the relay satellite, and the method specifically comprises the following steps:
step 5-1: the Ka radio frequency transmitting module receives the high-speed telemetering data output by the Ka baseband module, sequentially carries out carrier modulation, small signal amplification and filtering on the high-speed telemetering data, and then transmits the filtered high-speed telemetering data to the Ka frequency band phased array antenna; meanwhile, the ground command center generates a corresponding control instruction according to the low-speed telemetering data and the preset corresponding relation between the low-speed telemetering data and the control instruction in the step 4-1, so that whether the Ka-band phased array antenna is started or not is controlled, if the control instruction is effective, the Ka-band phased array antenna is started, and the Ka-band phased array antenna transmits the filtered high-speed telemetering data to the relay satellite; if the control command is invalid, the Ka frequency band phased array antenna keeps a power-off state;
the relay measurement and control terminal sends the low-speed telemetering data to a ground S transmitting antenna and a skyward S transmitting antenna, and then transmits the low-speed telemetering data to a relay satellite, and the specific steps are as follows:
step 6-1: the S baseband module receives low-speed telemetering data output by the Ka baseband module in real time;
step 6-2: the S baseband module sequentially performs framing, coding and spread spectrum modulation on the low-speed telemetering data and then transmits the data after spread spectrum modulation to the S radio frequency transmitting module; and the S radio frequency transmitting module performs up-conversion, amplification and filtering on the received data, outputs the data to the ground S transmitting antenna and the skyward S transmitting antenna, and transmits the data to the relay satellite.
Further, the transmission rate of the high-speed telemetry data in the step 4-1 is Mbps, and the transmission rate of the low-speed telemetry data is kbps.
Furthermore, the Ka frequency band phased array antenna, the ground-to-S receiving antenna, the skyward-S receiving antenna, the ground-to-S transmitting antenna and the skyward-S transmitting antenna are connected with the relay measurement and control terminal through radio frequency cables.
Further, the remote control command b in the step 3-2 and the low-speed telemetry data in the step 4-1 are transmitted to the S baseband module through an internal bus.
Further, the ground S receiving antenna and the sky S receiving antenna are fixed wide beam antenna arrays.
Furthermore, the measurement and control system further comprises an S power module and a Ka power module, wherein the Ka power module provides electric energy for the Ka baseband module, the Ka radio frequency receiving module and the Ka radio frequency transmitting module, and the S power module provides electric energy for the S baseband module, the S radio frequency receiving module and the S radio frequency transmitting module.
Further, the capturing, tracking, bit synchronization, demodulation and decoding operations in the step 1-2 and the step 3-2 are respectively completed in the baseband signal processing units FPGA in the S baseband module and the Ka baseband module.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A measurement and control method based on a Ka-S frequency band relay integrated measurement and control system is characterized in that the measurement and control system comprises a Ka frequency band phased array antenna, a relay measurement and control terminal, a ground S receiving antenna, a skyhook S receiving antenna, a ground S transmitting antenna and a skyhook S transmitting antenna;
the measurement and control method is divided into a forward measurement and control communication link mode and a return measurement and control communication link mode, wherein the measurement and control method of the forward measurement and control communication link mode comprises the following steps:
the relay satellite forwards an S-frequency band forward remote control signal sent by the ground command center to the ground S receiving antenna and the sky S receiving antenna, and the ground S receiving antenna and the sky S receiving antenna send the S-frequency band forward remote control signal received in real time to the relay measurement and control terminal;
the relay measurement and control terminal generates a remote control instruction a according to the two S frequency band forward remote control signals and then sends the remote control instruction a to the aircraft platform so as to control the aircraft platform;
meanwhile, the relay satellite forwards a Ka frequency band forward remote control signal sent by the ground command center to the Ka frequency band phased array antenna, and the relay measurement and control terminal controls whether the Ka frequency band phased array antenna is started or not according to a remote control instruction a: if the relay terminal is started, the Ka frequency band phased array antenna sends the received Ka frequency band forward remote control signal to the relay measurement and control terminal;
the relay measurement and control terminal generates a remote control instruction b according to the Ka frequency band forward remote control signal and then sends the remote control instruction b to the aircraft platform so as to control the aircraft platform;
if the relay measurement and control terminal generates a remote control command a and a remote control command b at the same time, the relay measurement and control terminal selects one path of remote control command to control the aircraft platform according to the set priority;
the measurement and control method of the return measurement and control communication link mode comprises the following steps:
the relay measurement and control terminal receives the telemetering data of the aircraft platform, simultaneously acquires the telemetering data generated by the relay measurement and control terminal and the telemetering data of the Ka frequency band phased array antenna, and generates low-speed telemetering data and high-speed telemetering data according to the three telemetering data;
and the ground command center controls whether the Ka frequency band phased array antenna is started or not according to the low-speed telemetering data: if the system is started, the Ka frequency band phased array antenna transmits the high-speed telemetering data to the relay satellite, and finally the relay satellite forwards the high-speed telemetering data to the ground command center;
meanwhile, the relay measurement and control terminal sends the low-speed telemetering data to a ground S transmitting antenna and a skyward S transmitting antenna, the low-speed telemetering data are further transmitted to a relay satellite, and finally the relay satellite forwards the low-speed telemetering data to a ground command center;
the relay measurement and control terminal controls whether the Ka frequency band phased array antenna is started or not according to the remote control instruction a, and the method comprises the following specific steps:
step 2-1: the Ka baseband module receives a remote control command a obtained by decoding the S baseband module and controls whether the Ka frequency band phased array antenna is started or not according to the remote control command a; if the remote control command a is effective, the Ka frequency band phased array antenna is started, and if the remote control command a is ineffective, the Ka frequency band phased array antenna is not started;
the relay measurement and control terminal receives the telemetering data of the aircraft platform, simultaneously acquires the telemetering data generated by the relay measurement and control terminal and the telemetering data of the Ka frequency band phased array antenna, and generates low-speed telemetering data and high-speed telemetering data according to the three telemetering data, and the specific steps are as follows:
step 4-1: the Ka baseband module receives telemetry data transmitted by the aircraft platform through a telemetry 422 interface of the Ka baseband module, and then frames, codes and forms and filters the three types of telemetry data to obtain high-speed telemetry data; then, the Ka baseband module extracts the telemetry data of the aircraft platform and the telemetry data of the Ka baseband module from the high-speed telemetry data, forms the 2 telemetry data into low-speed telemetry data and transmits the low-speed telemetry data to the S baseband module;
the ground command center controls whether the Ka frequency band phased array antenna is started or not according to the low-speed telemetering data so as to transmit the high-speed telemetering data to the relay satellite, and the method specifically comprises the following steps:
step 5-1: the Ka radio frequency transmitting module receives the high-speed telemetering data output by the Ka baseband module, sequentially carries out carrier modulation, small signal amplification and filtering on the high-speed telemetering data, and then transmits the filtered high-speed telemetering data to the Ka frequency band phased array antenna; meanwhile, the ground command center generates a corresponding control instruction according to the low-speed telemetering data and the preset corresponding relation between the low-speed telemetering data and the control instruction in the step 4-1, so that whether the Ka-band phased array antenna is started or not is controlled, if the control instruction is effective, the Ka-band phased array antenna is started, and the Ka-band phased array antenna transmits the filtered high-speed telemetering data to the relay satellite; and if the control command is invalid, the Ka frequency band phased array antenna keeps the power-off state.
2. The measurement and control method based on the Ka-S frequency band relay integrated measurement and control system as claimed in claim 1, wherein the relay measurement and control terminal is always in a working state and comprises a Ka baseband module, a Ka radio frequency receiving module, a Ka radio frequency transmitting module, an S baseband module, an S radio frequency receiving module and an S radio frequency transmitting module;
the relay measurement and control terminal generates a remote control instruction a according to the two S frequency band forward remote control signals and then sends the remote control instruction a to the aircraft platform, and the method specifically comprises the following steps:
step 1-1: the S radio frequency receiving module synthesizes the received two S frequency band forward remote control signals into one signal, and sequentially carries out filtering, low-noise amplification, down-conversion, intermediate frequency filtering and AGC (automatic gain control) amplification on the signal to obtain an intermediate frequency signal;
step 1-2: the S baseband module receives the intermediate frequency signal output by the S radio frequency receiving module, carries out AD sampling on the intermediate frequency signal, sends the signal subjected to AD sampling into the S baseband module to be sequentially subjected to capturing, tracking, bit synchronization, demodulation and decoding to obtain a remote control command a, and finally transmits the remote control command a to the aircraft platform through a self remote control 422 interface;
the relay measurement and control terminal controls whether the Ka frequency band phased array antenna is started or not according to the remote control instruction a, and the method comprises the following specific steps:
step 2-1: the Ka baseband module receives a remote control command a obtained by decoding the S baseband module and controls whether the Ka frequency band phased array antenna is started or not according to the remote control command a; if the remote control command a is effective, the Ka frequency band phased array antenna is started, and if the remote control command a is ineffective, the Ka frequency band phased array antenna is not started;
the relay measurement and control terminal generates a remote control instruction b according to the Ka frequency band forward remote control signal and then sends the remote control instruction b to the aircraft platform, and the method specifically comprises the following steps:
step 3-1: the Ka radio frequency receiving module sequentially carries out filtering, low-noise amplification, down-conversion, intermediate frequency filtering and AGC (automatic gain control) amplification on the received Ka frequency band forward remote control signal to obtain an intermediate frequency signal;
step 3-2: the Ka baseband module receives the intermediate frequency signal output by the Ka radio frequency receiving module, carries out AD sampling on the intermediate frequency signal, sends the AD sampled signal into the Ka baseband module to be sequentially captured, tracked, bit synchronized, demodulated and decoded to obtain a remote control command b, and finally sends the remote control command b to the S baseband module, and the S baseband module sends the remote control command b to the aircraft platform through a self remote control 422 interface;
the relay measurement and control terminal receives the telemetering data of the aircraft platform, simultaneously acquires the telemetering data generated by the relay measurement and control terminal and the telemetering data of the Ka frequency band phased array antenna, and generates low-speed telemetering data and high-speed telemetering data according to the three telemetering data, and the specific steps are as follows:
step 4-1: the Ka baseband module receives telemetry data transmitted by the aircraft platform through a telemetry 422 interface of the Ka baseband module, and then frames, codes and forms and filters the three types of telemetry data to obtain high-speed telemetry data; then, the Ka baseband module extracts the telemetry data of the aircraft platform and the telemetry data of the Ka baseband module from the high-speed telemetry data, forms the 2 telemetry data into low-speed telemetry data and transmits the low-speed telemetry data to the S baseband module;
the ground command center controls whether the Ka frequency band phased array antenna is started or not according to the low-speed telemetering data so as to transmit the high-speed telemetering data to the relay satellite, and the method specifically comprises the following steps:
step 5-1: the Ka radio frequency transmitting module receives the high-speed telemetering data output by the Ka baseband module, sequentially carries out carrier modulation, small signal amplification and filtering on the high-speed telemetering data, and then transmits the filtered high-speed telemetering data to the Ka frequency band phased array antenna; meanwhile, the ground command center generates a corresponding control instruction according to the low-speed telemetering data and the preset corresponding relation between the low-speed telemetering data and the control instruction in the step 4-1, so that whether the Ka-band phased array antenna is started or not is controlled, if the control instruction is effective, the Ka-band phased array antenna is started, and the Ka-band phased array antenna transmits the filtered high-speed telemetering data to the relay satellite; if the control command is invalid, the Ka frequency band phased array antenna keeps a power-off state;
the relay measurement and control terminal sends the low-speed telemetering data to a ground S transmitting antenna and a skyward S transmitting antenna, and then transmits the low-speed telemetering data to a relay satellite, and the specific steps are as follows:
step 6-1: the S baseband module receives low-speed telemetering data output by the Ka baseband module in real time;
step 6-2: the S baseband module sequentially performs framing, coding and spread spectrum modulation on the low-speed telemetering data and then transmits the data after spread spectrum modulation to the S radio frequency transmitting module; and the S radio frequency transmitting module performs up-conversion, amplification and filtering on the received data, outputs the data to the ground S transmitting antenna and the skyward S transmitting antenna, and transmits the data to the relay satellite.
3. The measurement and control method based on the Ka-S frequency band relay integrated measurement and control system as claimed in claim 2, wherein the transmission rate of the high-speed telemetering data in the step 4-1 is Mbps, and the transmission rate of the low-speed telemetering data is kbps.
4. The measurement and control method based on the Ka-S frequency band relay integrated measurement and control system as claimed in claim 2, wherein the Ka frequency band phased array antenna, the S receiving antenna for the ground, the S receiving antenna for the sky, the S transmitting antenna for the ground and the S transmitting antenna for the sky are connected with the relay measurement and control terminal through radio frequency cables.
5. The measurement and control method based on the Ka-S frequency band relay integrated measurement and control system as claimed in claim 2, wherein the remote control command b in step 3-2 and the low-speed telemetry data in step 4-1 are transmitted to the S baseband module through an internal bus.
6. The measurement and control method based on the Ka-S frequency band relay integrated measurement and control system as claimed in claim 2, wherein the ground S receiving antenna and the skyward S receiving antenna are fixed wide beam antenna arrays.
7. The measurement and control method based on the Ka-S frequency band relay integrated measurement and control system as claimed in any one of claims 2-6, wherein the measurement and control system further comprises an S power module and a Ka power module, wherein the Ka power module provides electric energy for the Ka baseband module, the Ka radio frequency receiving module and the Ka radio frequency transmitting module, and the S power module provides electric energy for the S baseband module, the S radio frequency receiving module and the S radio frequency transmitting module.
8. The measurement and control method based on the Ka-S frequency band relay integrated measurement and control system as claimed in any one of claims 2-6, wherein the capturing, tracking, bit synchronization, demodulation and decoding operations in steps 1-2 and 3-2 are respectively completed in the baseband signal processing units FPGA in the S baseband module and Ka baseband module.
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| CN109831245B (en) * | 2019-03-22 | 2019-12-27 | 中国人民解放军军事科学院国防科技创新研究院 | Space-based data chain device and space-based data chain transmission method |
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