CN201600450U - Intra-pulse phase modulation anti-jamming radar receiver - Google Patents
Intra-pulse phase modulation anti-jamming radar receiver Download PDFInfo
- Publication number
- CN201600450U CN201600450U CN2009201225562U CN200920122556U CN201600450U CN 201600450 U CN201600450 U CN 201600450U CN 2009201225562 U CN2009201225562 U CN 2009201225562U CN 200920122556 U CN200920122556 U CN 200920122556U CN 201600450 U CN201600450 U CN 201600450U
- Authority
- CN
- China
- Prior art keywords
- phase
- modulation
- phase shifter
- radar
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
The utility mode provides an intra-pulse phase modulation anti-jamming radar receiver, which realizes radar intra-pulse phase modulation anti-jamming reception via a special structure of sharing a phase shifter for receiving and transmitting. The receiver includes a local oscillator, a phase shifter, pulse modulation, an LNA, lower frequency conversion and an optimization code table, wherein an output end of the optimization code table is connected to a control input end of the phase shifter, an output end of the phase shifter is connected to a signal input end of the pulse modulation, and an output end of the pulse modulation is connected to a radar transmitting system. Echo signals sequentially pass the LNA and the lower frequency conversion, and are transmitted to a sequential signal processing system after being output and restored, an anti-jamming function is independently completed at a front end, and no phase code word synchronous connection is required between receiving and transmitting.
Description
Technical field
The utility model relates to the radar communication technology, relates in particular to phase modulation (PM) unjammable radar receiver between a kind of arteries and veins.
Background technology
The main effect of radar receiver is amplification and handles the echo that the radar emission back reflection is returned.For weak reflectivity target radar, as weather radar, wind profile radar, many times since echo strength a little less than, be easy to be subjected to environmental interference, especially wind profile radar, its sensitivity need than the high 40 ~ 50dBm of general radar, and its employed frequency range is UHF or pattern-band simultaneously, comparatively approaching with the frequency that communication system is adopted, very easily be subjected to the Active Jamming of communication facilities.For solving the contradiction of wind profile system's high sensitivity and anti-interference, wind profile radar must adopt Anti-interference Design.Weather radar when surveying the clear sky wind field, echo also very a little less than, be interfered easily.Currently carried out a large amount of anti-interference research both at home and abroad, two kinds of methods are arranged in essence: a kind of is by structural design or transmitted waveform control method, interference is not entered or enters in the radar receiver less; Another kind is after interference enters radar receiver, utilizes the different qualities of target echo and interference to be distinguished.From the Radar Receiver Technology angle, it is frequency agility and clutter analysis and emission selection control (JATS) technology that radar anti-active disturbs the most frequently used technology, receiver is at first analyzed interfering frequency and is distributed, the control system transmission frequency is avoided interfering frequency then, thereby interference can not be entered or enters radar receiver (referring to list of references 1) less.The signal Processing digital filtering mode is generally adopted in the anti-passive interference of receiver, and promptly moving-target shows that (MTI) or moving-target detect (MTD) technology.
Adopt the anti-Active Jamming of frequency agility, realize comparatively complexity, need local oscillator to have frequency modulation function, frequency source is realized comparatively complicated, for Electro Magnetic Compatibility, the transmission frequency of radar is subjected to the restriction of demand frequency allocated bandwidth, does not many times allow transmission frequency to have bigger span simultaneously.Adopt MTI or the anti-Active Jamming of MTD and inapplicable,, can't adopt filtering mode because Active Jamming and radar return are non-coherents.In order to overcome the shortcoming of said method, the anti-Active Jamming of employing phase encoding mode has appearred, its advantage is to keep the transmission frequency of radar constant, only utilizes the analog or digital phase shift to carry out in the arteries and veins and phase shift between arteries and veins, improves signal interference ratio by signal processing means such as digital pulse compressions then.In order to make full use of accumulation effect between the radar arteries and veins, prior art produces pseudo-random code sequence between arteries and veins at transmitting terminal, utilize such code word that transponder pulse is carried out phase modulation (PM), preserve corresponding modulation code word simultaneously, the code word that the signal processor utilization is preserved during received signal is carried out rightabout phase shift to echo and is handled, reduction coherent echo signal, subsequent treatment has improved the signal interference ratio of echo, thereby reaches the purpose that suppresses Active Jamming.
Conventional phase modulation unjammable radar receiver product implementation structure as shown in Figure 1, at first the phase code output that is produced by M sequence pseudo-noise code generator (7) is connected to the input end of phase shifter (2), local oscillator (1) output terminal is connected to the input end of phase shifter, the phase shifter output terminal is connected to pulsed modulation (3) input end, and modulator produces driving pulse and is connected to the radar emission system.Echo then passes through LNA (5) low noise amplifier successively, down coversion (6), and digital phase shift is reduced to normal echoed signal after (8).Local oscillation signal output is connected to phase shifter input end and down coversion input end respectively.
The shortcoming of this realization be need to receive and the emission code word between synchronously, the processing power of consumption signal processor simultaneously, and different phase shifter characteristics needs different phase meters, has increased the complexity of radar receiver.
The utility model content
The purpose of this utility model is to provide phase modulation (PM) unjammable radar receiver between a kind of arteries and veins, realizes phase modulation (PM) anti-interference reception between the arteries and veins of radar by the special construction that receives and launch a shared phase shifter.The local oscillator reference signal that this radar receiver down coversion is adopted is the local oscillation signal after the phase shift, utilize simulation trial to realize the reduction of unjammable radar receiver echoed signal, with respect to existing unjammable radar receiver scheme, only do not increase system unit by structural change, and the system of transmitting and receiving need not synchro control, and anti-interference function is independently finished at receiving front-end, need not the participation of signal processor, simplify radar receiver greatly, reduced cost.
Phase modulation (PM) unjammable radar receiver can be realized by following mode between the utility model arteries and veins, comprises local oscillator, phase shifter, pulsed modulation, LNA, down coversion, optimization code table.The output terminal of described optimization code table is connected to the control input end of phase shifter, and the output terminal of described phase shifter is connected to pulse modulated signal input part, and pulsed modulation output terminal output drive signal is connected to the radar emission system.Synchronizing signal from radar system inputs to optimization code table and pulsed modulation control input end respectively, optimizes the phase shifter phase control code of code table generation and impulsive synchronization.Echoed signal is successively by LNA, and down coversion is exported reduction back echo signal to the follow-up signal disposal system.Local oscillation signal output after the phase shifter phase shift is connected to the local oscillator reference input of down coversion.The principal character of this product is that local oscillation signal also is connected to pulsed modulation and down coversion respectively after the phase shift of phase shifter output two-way, the emission excitation pulse signal is from phase shift afterpulse modulation output, down coversion local oscillator reference-input signal is a local oscillation signal after the phase shift, anti-interference function is independently finished at front end, need not the phase place code word between reception and the emission and connects existence synchronously.
Description of drawings
Fig. 1 is a phase modulation (PM) unjammable radar receiver structure between traditional arteries and veins
Fig. 2 is a phase modulation (PM) unjammable radar receiver structure between the utility model arteries and veins
Embodiment
The realization of phase modulation (PM) unjammable radar receiver as shown in Figure 2 between the utility model arteries and veins.Describe in further detail below in conjunction with 2 pairs of embodiments of the present utility model of accompanying drawing.
The utility model unjammable radar receiver can be realized by following mode, comprises local oscillator (1), phase shifter (2), pulsed modulation (3), LNA (5), down coversion (6), optimizes code table (4).
The output terminal of described optimization code table is connected to the control input end of phase shifter, and the output terminal of described phase shifter is connected to pulse modulated signal input part, and pulsed modulation output terminal output drive signal is connected to the radar emission system.Synchronizing signal from radar system inputs to optimization code table and pulsed modulation respectively, optimizes the phase shifter phase place of code table generation and impulsive synchronization.At receiving end, echoed signal is successively by the LNA low noise amplifier, and down coversion is exported reduction back echo signal to follow-up signal and handled.Local oscillation signal output after the phase shifter phase shift is connected to the local oscillator reference input of down coversion.Local oscillation signal also was connected to pulsed modulation and down coversion respectively after phase shifter was output as the two-way phase shift, and the emission excitation pulse signal is from phase shift afterpulse modulation output, and down coversion local oscillator reference-input signal is a local oscillation signal after the phase shift.
Described optimization code table phase code adopts the frequency spectrum white noise to optimize fixed sequence program, and the code table synchronous input end is connected to radar system synchronous 1.Optimize the synchronous down output respective phase control code of code table in the radar synchronous triggering, the control phase shifter is sent to pulsed modulation and down coversion to the local oscillation signal phase shift simultaneously through the local oscillation signal after the phase shifter phase shift.Described pulse modulated signal input part is connected to the output terminal of phase shifter, and it is synchronous 2 that pulse modulated control input end is connected to radar system, is subjected to the driving pulse after its control produces phase shift.The continuous wave radiofrequency signal of local oscillator output inputs to phase shifter, and the local oscillation signal of phase shifter after with phase shift is divided into two-way, and one the tunnel gives pulsed modulation, and another road is connected to the reception down coversion.
Described down coversion adopts the local oscillation signal after the phase shift to carry out the down coversion of echoed signal as the reference signal, realizes the reduction of echoed signal phase place simultaneously, finishes anti-interference reception.Current echoed signal is connected to the LNA low noise amplifier and amplifies, LNA output is connected to down coversion and carries out down-frequency conversion, the local oscillation signal of exporting after the phase shift of process phase shifter is connected to the reference signal input end of down coversion, and is different with the original local oscillation signal that general radar receiver is connect.Low-converter has outside the general frequency down-conversion function in the utility model connected mode, also has echoed signal phase place restoring function simultaneously.For echo and reference local oscillator signal, because the phase shift phase angle that phase shifter produced is identical, in mixing beat process, Analogue mixer mixing principle has realized that two phase angles subtract each other and offset, finished the reverse phase shift in the receiving course, reduce echoed signal, realized the anti-interference reception of radar.
List of references:
1. Radar Receiver Technology is shooted a retrievable arrow steady volume, the Electronic Industry Press, and print in April, 2005 for the first time.
Claims (2)
1. phase modulation (PM) unjammable radar receiver between an arteries and veins, comprise local oscillator, phase shifter, pulsed modulation, LNA, down coversion, optimization code table, its principal character is that local oscillation signal also is connected to pulsed modulation and down coversion respectively after the phase shift of phase shifter output two-way, and the emission excitation pulse signal is from phase shift afterpulse modulation output.
2. phase modulation (PM) unjammable radar receiver between a kind of arteries and veins according to claim 1 is characterized in that the down coversion input end is connected to the phase shifter output terminal, and the local oscillation signal after the phase shift is as the down coversion reference signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201225562U CN201600450U (en) | 2009-06-16 | 2009-06-16 | Intra-pulse phase modulation anti-jamming radar receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201225562U CN201600450U (en) | 2009-06-16 | 2009-06-16 | Intra-pulse phase modulation anti-jamming radar receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201600450U true CN201600450U (en) | 2010-10-06 |
Family
ID=42811514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201225562U Expired - Lifetime CN201600450U (en) | 2009-06-16 | 2009-06-16 | Intra-pulse phase modulation anti-jamming radar receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201600450U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110149286A (en) * | 2015-05-11 | 2019-08-20 | 蒋华丽 | The signal processing method of the raising signal-to-noise ratio of digital communication under additive noise environment |
| WO2021197065A1 (en) * | 2020-03-30 | 2021-10-07 | 华为技术有限公司 | Interference suppression method and detection device |
-
2009
- 2009-06-16 CN CN2009201225562U patent/CN201600450U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110149286A (en) * | 2015-05-11 | 2019-08-20 | 蒋华丽 | The signal processing method of the raising signal-to-noise ratio of digital communication under additive noise environment |
| WO2021197065A1 (en) * | 2020-03-30 | 2021-10-07 | 华为技术有限公司 | Interference suppression method and detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212433393U (en) | Radar interference simulation equipment | |
| CN213210458U (en) | Radar target simulation and interference countermeasure training system | |
| CN107064956B (en) | A kind of ground Terahertz cloud detection radar system and its detection method | |
| CN101324666A (en) | Method for detecting concealed target life trace and concealed target detection device | |
| CN104199025B (en) | Ultra-wideband pseudo-random encoding radar system | |
| EP1929327B1 (en) | Signal acquisition system and method for ultra-wideband (uwb) radar | |
| CN113093123B (en) | Jammer for resisting pulse Doppler radar and interference method thereof | |
| CN101089653A (en) | Short-range frequency-modulation continuous wave FMCW radar anti-interference method | |
| CN101470202A (en) | Pulse Doppler radar system and its signal processing method | |
| CN101021561A (en) | Wide band rader utilizing multi-transmitting and multi-receiving frequency division signal and imaging method thereof | |
| CN202794515U (en) | Navigation radar for FMCW (frequency-modulated continuous wave) ship | |
| CN110146892A (en) | A kind of dual polarization radar | |
| CN109633758B (en) | Multi-frequency composite ground penetrating radar system | |
| CN103728593A (en) | Method for allowing ground wave over-the-horizon radar to achieve multifrequency transmission and reception simultaneously | |
| CN114355310B (en) | Multimode agile waveform generation and processing method of cognitive radar | |
| CN107045148A (en) | A kind of GPR | |
| CN201600450U (en) | Intra-pulse phase modulation anti-jamming radar receiver | |
| CN103728620B (en) | A kind of polarization sensitive synthetic aperture radar system based on transmitting-receiving ALT pulse group | |
| CN103954933A (en) | Radar signal processing method based on terahertz wave band | |
| KR100940918B1 (en) | Method of transmitting pulse waveform in pulse-compression radar for detection of blind zone, pulse-compression radar using the same and radar network thereof | |
| CN203465419U (en) | Communication satellite reflection signal remote sensing monitoring system | |
| CN114994687B (en) | Dual-frequency atmospheric radar system and control method thereof | |
| CN102830388A (en) | Method for generating real-time simulation signals of two-dimensional space moving target in digital domain | |
| CN205232206U (en) | S wave band wave observation radar frequency synthesizer | |
| CN201594137U (en) | Main wave multiplexing pulse radar receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101006 |
|
| CX01 | Expiry of patent term | ||
| DD01 | Delivery of document by public notice |
Addressee: Hangzhou Mintan Technology Co., Ltd. Document name: Notification of Expiration of Patent Right Duration |
|
| DD01 | Delivery of document by public notice |