CN112763986A - Radar communication integrated information distribution system - Google Patents
Radar communication integrated information distribution system Download PDFInfo
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- CN112763986A CN112763986A CN202110215498.3A CN202110215498A CN112763986A CN 112763986 A CN112763986 A CN 112763986A CN 202110215498 A CN202110215498 A CN 202110215498A CN 112763986 A CN112763986 A CN 112763986A
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
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Abstract
The invention relates to the field of wireless communication, in particular to a radar communication integrated information distribution system which is simple in structure, reuses radar resources and improves information transmission efficiency. The radar communication system is characterized by sequentially connecting an excitation change-over switch, a radar up-converter, a radar transmitter, a duplexer and a radar antenna, wherein the excitation change-over switch is respectively connected with a radar waveform generation module and a communication model generation module; the communication waveform generation module generates a communication pulse intermediate frequency signal; the radar waveform generating module generates radar pulse intermediate frequency signals. The radar communication integrated information distribution system provided by the invention has the advantages that the communication function and the radar system are integrally designed, the simultaneous work of radar and information distribution is supported, the target information detected by the radar is quickly transmitted to the radar equipment, command vehicles or individual nodes within tens of kilometers of the periphery, the manual input is not needed, the real-time performance and the accuracy of information transmission are ensured, and the rapid and accurate decision making of a commander is facilitated.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a radar communication integrated information distribution system which is simple in structure, reuses radar resources and improves information transmission efficiency.
Background
In modern information wars, a radar system is used as main information equipment, target information detected by the radar system is usually manually or automatically recorded and then transmitted to a rear control center in a wired or wireless communication mode, and the radar system is low in transmission speed and short in distance. At present, the existing method for multiplexing the radio frequency resources of the radar system to realize communication mainly adopts a time-sharing working mode of the radar system and the communication, and cannot realize the simultaneous working of the radar system and the communication.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the radar communication integrated information distribution system which is simple in structure and convenient for loading and unloading.
The technical scheme adopted by the invention is as follows: the radar communication integrated information distribution system comprises an excitation change-over switch, a radar up-converter, a radar transmitter, a duplexer and a radar antenna which are connected in sequence, wherein the excitation change-over switch is respectively connected with a radar waveform generation module and a communication model generation module; the communication waveform generation module generates a communication pulse intermediate frequency signal, and the communication pulse intermediate frequency signal is consistent with the simulated intermediate frequency center frequency and the signal bandwidth of the radar system; the radar waveform generating module generates radar pulse intermediate frequency signals.
In order to better realize the invention, the duplexer is also sequentially connected with a radar down converter, a radar signal processor and a radar comprehensive display and control console, the radar comprehensive display and control console is respectively connected with the radar waveform generation module and the communication model generation module, and the radar signal processor is also connected with the radar waveform generation module.
In order to better realize the invention, the communication pulse intermediate frequency signal and the radar pulse intermediate frequency signal simultaneously enter the excitation change-over switch, and the communication pulse intermediate frequency signal or the radar pulse intermediate frequency signal is controlled to be output in the radar emission period through the excitation change-over switch.
In order to better realize the invention, a single radar transmitting period comprises a shielding pulse, a blind compensating pulse and a main pulse, wherein the shielding pulse is used for transmitting a communication pulse intermediate frequency signal, and the blind compensating pulse and the main pulse are used for transmitting a radar pulse intermediate frequency signal; the communication pulse intermediate frequency signal is positioned before the radar pulse intermediate frequency signal.
In order to better realize the invention, the shielding pulse, the blind-repairing pulse and the main pulse respectively adopt different transmitting frequency tables, and a certain frequency df is arranged between any two pulses.
In order to better implement the invention, df is not less than the minimum frequency interval BW of the transmitting frequency of the radar system, and is an integral multiple of BW, that is, df is N BW (N is 1, 2, 3).
In order to better realize the invention, the communication pulse intermediate frequency signal adopts a constant envelope modulation mode.
In order to better realize the invention, the communication pulse intermediate frequency signal adopts a repeated sending mode in a plurality of sending periods.
In order to better realize the invention, the content of the communication pulse intermediate frequency signal transmission comprises target longitude and latitude, height, recording time, radar station number and batch number information.
The invention has the beneficial effects that: the radar communication integrated information distribution system provided by the invention has the advantages that the communication function and the radar system are integrally designed, the simultaneous work of radar and information distribution is supported, the target information detected by the radar is quickly transmitted to the radar equipment, command vehicles or individual nodes within tens of kilometers of the periphery, the manual input is not needed, the real-time performance and the accuracy of information transmission are ensured, and the rapid and accurate decision making of a commander is facilitated.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a block diagram of a radar communication integrated information distribution system according to the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Example 1:
as shown in fig. 1, the radar communication integrated information distribution system of the present invention includes an excitation switch, a radar up-converter, a radar transmitter, a duplexer, and a radar antenna, which are connected in sequence, wherein the excitation switch is respectively connected to a radar waveform generation module and a communication model generation module; the communication waveform generation module generates a communication pulse intermediate frequency signal, and the communication pulse intermediate frequency signal is consistent with the simulated intermediate frequency center frequency and the signal bandwidth of the radar system; the radar waveform generating module generates radar pulse intermediate frequency signals. The radar communication integrated information distribution system provided by the invention has the advantages that the communication function and the radar system are integrally designed, the simultaneous work of radar and information distribution is supported, the target information detected by the radar is quickly transmitted to the radar equipment, command vehicles or individual nodes within tens of kilometers of the periphery, the manual input is not needed, the real-time performance and the accuracy of information transmission are ensured, and the rapid and accurate decision making of a commander is facilitated.
Example 2:
on the basis of the above embodiment, in order to further implement the present invention, the duplexer further sequentially connects a radar down converter, a radar signal processor, and a radar integrated display and control console, the radar integrated display and control console is respectively connected with the radar waveform generation module and the communication model generation module, and the radar signal processor is further connected with the radar waveform generation module.
Example 3:
on the basis of the above embodiment, in order to further better implement the present invention, the communication pulse intermediate frequency signal and the radar pulse intermediate frequency signal enter the excitation switch at the same time, and the communication pulse intermediate frequency signal or the radar pulse intermediate frequency signal is controlled to be output in the radar transmission period by the excitation switch.
Example 4:
on the basis of the above embodiment, in order to further better implement the present invention, a single radar transmission cycle includes a shield pulse, a blind compensating pulse, and a main pulse, wherein the shield pulse is used for transmitting a communication pulse intermediate frequency signal, and the blind compensating pulse and the main pulse are used for transmitting a radar pulse intermediate frequency signal; the communication pulse intermediate frequency signal is positioned before the radar pulse intermediate frequency signal. After the design, the communication pulse is transmitted firstly, and then the radar pulse is transmitted, so that the influence of the communication pulse on the radar pulse target detection function is avoided.
Example 5:
on the basis of the above embodiment, in order to further better implement the present invention, the shielding pulse, the blind-repairing pulse and the main pulse respectively adopt different transmission frequency tables, and a certain frequency df is arranged between any two pulses. For example, the main pulse of the intermediate frequency signal of the radar pulse adopts the same frequency f0, the blind-fill pulse adopts the frequency f0+ df, and the shield pulse frequency for transmitting the communication signal is f +2 x df, so that each pulse signal can filter the echo signal of the communication pulse, and the target detection and communication information distribution functions of the radar system are prevented from being influenced.
Preferably, df is not less than the minimum frequency interval BW of the radar system transmitting frequency and is an integral multiple of BW, that is, df is N BW (N is 1, 2, 3).
Example 6:
based on the above embodiments, in order to further implement the present invention, the communication pulse intermediate frequency signal adopts a constant envelope modulation mode, including but not limited to a modulation mode such as CFFSK, to adapt to signal distortion caused by saturation amplification in a radar transmission channel.
Preferably, the communication pulse intermediate frequency signal is repeatedly transmitted in a plurality of transmission periods to adapt to the characteristics of narrow lobe and high directivity of a radar transmitting antenna, and the receiving success rate of information distribution is improved.
Preferably, the content of the communication pulse intermediate frequency signal transmission comprises target longitude and latitude, height, recording time, radar station number and batch number information, and rapid distribution of radar target detection information is realized.
As a preferred embodiment, a typical radar system is exemplified by integrating additional radar communication. The radar waveform generating module generates radar simulation intermediate frequency signals with the center frequency of 30MHz and the bandwidth of 3MHz, and sends radar detection pulses to a radar antenna for emission after up-conversion is carried out through a radar up-converter and power amplification is carried out through a transmitter. The channel spacing of the radar system is 5MHz, i.e. the minimum spacing between the two transmission frequencies of a radar pulse is 5 MHz.
The treatment process specifically comprises the following steps:
(1) and the newly-added communication waveform generation module is used for generating communication analog intermediate frequency signals with the same basic parameters as the radar analog intermediate frequency signals, namely the center frequency is 30MHz, the bandwidth is 3MHz, so that radio frequency channels such as up-conversion channels, transmitters and the like of a radar system can be multiplexed.
(2) In order to realize the switching of the radar simulation intermediate frequency signal and the communication simulation intermediate frequency signal, an excitation selector switch is additionally arranged, and the communication simulation intermediate frequency signal and the radar simulation intermediate frequency signal are received as two paths of input; selecting and inputting a radar simulation intermediate frequency signal or a communication simulation intermediate frequency signal through switch control;
(3) each transmission period comprises 3 effective signal pulses, namely a shielding pulse, a blind compensating pulse and a main pulse in sequence; each cycle first transmits a masking pulse of length 60us, and then transmits a supplementary blind pulse and a main pulse of about 20us and 300us for detecting a short-distance target and a long-distance target, respectively. The radar communication system comprises a communication module, a radar module, a communication module and a communication module, wherein the communication pulse is transmitted firstly, and then the radar pulse is transmitted, so that the mutual influence between the communication pulse and the radar pulse is avoided, and the radar and the communication can work simultaneously;
(4) the switch control in (2) above switches the switch to transmit the communication pulse signal according to the pulse transmission sequence and cycle shown in (3), that is, in the shield pulse transmission cycle; transmitting radar pulse signals within the effective time of the blind-filling pulse and the main pulse;
(5) in terms of frequency allocation, a masking pulse of the communication signal is transmitted based on a single transmission period shown in (3), and a frequency different from that of the radar signal pulse is used. For example, the transmission frequency of the blind-filling pulse and the main pulse is 1200MHz, the transmission frequency of the shield pulse is selected from the frequency within the working frequency range of the radar system and the frequency which is different from the blind-filling pulse/the zhu pulse by the minimum frequency interval and is integral multiples of 5MHz, such as 1210MHz or 11900 MHz; based on this, radar system accessible receiving filter, the echo signal of filtering communication pulse signal avoids communication signal to influence radar system normal work.
(6) In the aspect of modulation mode selection, a CPFSK (continuous phase FSK) modulation mode is adopted, the excellent characteristics of continuous phase and constant envelope are achieved, bandwidth expansion caused by phase discontinuity can be eliminated, the problems of frequency spectrum expansion and amplitude phase distortion when a signal passes through a radar transmitting channel band limit, a nonlinear channel or a nonlinear amplifier can be remarkably reduced, and the CPFSK modulation mode has good frequency spectrum characteristics and frequency spectrum utilization rate.
(7) Different from the traditional communication system, the system has the advantages that the content of communication pulse signal transmission is radar detection target information, and a batch of targets are sent in each transmission period; the bit number of the single pulse transmitting information is 100-200 bits, for example, the radar detection target information comprises target longitude and latitude, height, recording time, radar station number, batch number and other information, the length does not exceed 120 bits, and the rapid distribution of the radar target detection information can be realized.
(8) The information transmission content in the above (7) may also be information with a relatively small data amount and a relatively high degree of importance, such as important command information.
(9) In order to adapt to the strong directivity characteristic of the radar antenna (namely, under the condition that the relative positions of the radar transmitting antenna and the communication receiver antenna are uncertain, the communication receiver can receive a communication signal only when a main lobe or a side lobe of the radar transmitting antenna is aligned with the communication receiver), in order to ensure that the effective information transmission of each frame and multiple batches is completed within the effective receiving range of the radar transmitting antenna aligned with the receiving antenna, the communication pulse signal transmission adopts a mode of sequentially and circularly transmitting target information of each batch, so that the targets of each batch have multiple transmitting opportunities, and the effective receiving probability of the receiving end to the targets of each batch is improved.
When only a batch of important targets is detected, the communication pulse circularly sends the target information in each emission period; when multiple lots (e.g., P lots) are found to be important targets, 1 through P lot targets are sent in successive loops.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (9)
1. Radar communication integration information distribution system, its characterized in that: the radar communication system comprises an excitation change-over switch, a radar up-converter, a radar transmitter, a duplexer and a radar antenna which are connected in sequence, wherein the excitation change-over switch is respectively connected with a radar waveform generation module and a communication model generation module; the communication waveform generation module generates a communication pulse intermediate frequency signal, and the communication pulse intermediate frequency signal is consistent with the simulated intermediate frequency center frequency and the signal bandwidth of the radar system; the radar waveform generating module generates radar pulse intermediate frequency signals.
2. The radar communication integration information distribution system according to claim 1, wherein: the duplexer still have connected gradually radar down converter, radar signal processor and radar and synthesize and show the control station, the radar synthesize show the control station respectively with radar waveform generate the module and connect with communication model generation module, radar signal processor still with radar waveform generate the module and connect.
3. The radar communication integration information distribution system according to claim 1, wherein: and the communication pulse intermediate frequency signal and the radar pulse intermediate frequency signal simultaneously enter an excitation switch, and the communication pulse intermediate frequency signal or the radar pulse intermediate frequency signal is controlled to be output in a radar emission period through the excitation switch.
4. The radar communication integration information distribution system according to claim 3, wherein: the single radar transmission cycle comprises a shielding pulse, a blind compensating pulse and a main pulse, wherein the shielding pulse is used for transmitting a communication pulse intermediate frequency signal, and the blind compensating pulse and the main pulse are used for transmitting a radar pulse intermediate frequency signal; the communication pulse intermediate frequency signal is positioned before the radar pulse intermediate frequency signal.
5. The radar communication integration information distribution system according to claim 4, wherein: the shield pulse, the blind-fill pulse and the main pulse respectively adopt different transmitting frequency tables, and a certain frequency df is arranged between any two pulses.
6. The radar communication integration information distribution system according to claim 5, wherein: the df is not less than the minimum frequency interval BW of the transmitting frequency of the radar system and is an integral multiple of BW, that is, df is N BW (N is 1, 2, 3).
7. The radar-communication integrated information distribution system according to claim 6, wherein: the communication pulse intermediate frequency signal adopts a constant envelope modulation mode.
8. The radar-communication-integrated information distribution system according to claim 7, wherein: the communication pulse intermediate frequency signal adopts a repeated sending mode in a plurality of sending periods.
9. The radar-communication-integrated information distribution system according to claim 8, wherein: the content of the communication pulse intermediate frequency signal transmission comprises target longitude and latitude, height, recording time, radar station number and batch number information.
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| WO2023070267A1 (en) * | 2021-10-25 | 2023-05-04 | 华为技术有限公司 | Electronic device and related device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023070267A1 (en) * | 2021-10-25 | 2023-05-04 | 华为技术有限公司 | Electronic device and related device |
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