CN103199880A - Self-adaptation zero-setting antenna system - Google Patents
Self-adaptation zero-setting antenna system Download PDFInfo
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- CN103199880A CN103199880A CN201310062917XA CN201310062917A CN103199880A CN 103199880 A CN103199880 A CN 103199880A CN 201310062917X A CN201310062917X A CN 201310062917XA CN 201310062917 A CN201310062917 A CN 201310062917A CN 103199880 A CN103199880 A CN 103199880A
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Abstract
The invention provides a self-adaptation zero-setting antenna system. The self-adaptation zero-setting antenna system comprises an antenna unit, an amplifying unit, a local oscillator unit, a filtering unit, a self-adaptation anti-interference processing module, a first frequency mixing unit and a second frequency mixing unit, wherein the antenna unit receives interference radio-frequency signals sent by a satellite, the amplifying unit is used for denoising and amplifying the interference radio-frequency signals, the local oscillator unit generates a first local oscillator and a second local oscillator signal, the first frequency mixing unit carries out down conversion on denoising gaining signals through the first local oscillator signal, the filtering unit carries out band-pass filtering on interference intermediate-frequency signals, the self-adaptation anti-interference processing module carries out automatic gaining, digital/analog conversion, differential processing and analog/digital conversion on band-pass filtering intermediate-frequency signals, and the second frequency mixing unit carries out up conversion processing on self-adaptation anti-interference intermediate-frequency gaining analog signals and then sends the signals to a satellite receiving device. The self-adaptation zero-setting antenna system has the advantages of being strong in anti-interference capacity, low in energy consumption, strong in stability, small in size and the like, and is applicable to the military industry.
Description
Technical field
The present invention relates to signal processing technology, particularly relate to a kind of self adaptation zeroing antenna system.
Background technology
In Fog of War, accurately the location is the key of winning the war.Ground panzer and transport vehicle, unmanned plane, missile-borne platform etc. all need satellite navigation signals accurately to command.In the practical application, power was very little when the band of satellite emission disturbed radiofrequency signal to arrive ground as navigation signal, and band disturbs the level of radiofrequency signal usually under the level of noise signal.The satellite receiving instrument can receive navigation signal and obtain information such as current orientation result, but its antijamming capability very a little less than.Adopt self adaptation zeroing technology to suppress interference signal in the practical application.Here, self adaptation zeroing technology is to utilize many array antennas, signal processing technology, forms antenna null in the interference signal direction, realizes carrying out filtering from the spatial domain to interference signal.At present, count the exploitation that company all is devoted to self adaptation zeroing antenna system both at home and abroad.In the practical application, existing self adaptation zeroing antenna system is still needed at aspects such as antijamming capability, stability and power consumptions and is further promoted, and size reaches the mixed use problem of many stars multiband more greatly.
This shows problem such as in the prior art, antenna system exists that antijamming capability is poor, power consumption is big, poor stability, size are bigger.
Summary of the invention
In view of this, main purpose of the present invention be to provide that a kind of antijamming capability is strong, power consumption is little, good stability, self adaptation zeroing antenna system that size is little.
In order to achieve the above object, the technical scheme of the present invention's proposition is:
A kind of self adaptation zeroing antenna system comprises: antenna element, amplifying unit, local oscillator unit, filter unit, Adaptive Anti-jamming processing module, the first mixing unit, the second mixing unit; Wherein,
Antenna element is used for directivity and frequency characteristic according to antenna, and the band that receives outside satellite emission disturbs radiofrequency signal, and will be with and disturb radiofrequency signal to be sent to amplifying unit.
Amplifying unit, the band that is used to antenna element to send disturb radiofrequency signal to fall hot-tempered processing successively, amplify and handle, and the hot-tempered gain signal that falls that will obtain is sent to the first mixing unit.
The local oscillator unit is used for generating first local oscillation signal, second local oscillation signal, and first local oscillation signal, second local oscillation signal is sent to the first mixing unit, the second mixing unit respectively.
The first mixing unit is used for first local oscillation signal by the transmission of local oscillator unit, and the hot-tempered gain signal that falls that amplifying unit is sent carries out down-converted, and the band that will obtain disturbs intermediate-freuqncy signal to be sent to filter unit.
Filter unit, the band that is used for that the first mixing unit is sent is sent to the Adaptive Anti-jamming processing module with the bandpass filtering intermediate-freuqncy signal after disturbing intermediate-freuqncy signal to carry out bandpass filtering treatment.
The Adaptive Anti-jamming processing module is used for the bandpass filtering intermediate-freuqncy signal that filter unit sends is carried out automatic gain processing, mould/number conversion processing successively, obtains the intermediate-frequency gain digital signal; After adopting difference method to remove interference signal in the intermediate-frequency gain digital signal, the anti-interference intermediate-frequency gain digital signal that obtains is carried out D/A switch handle, and the anti-interference intermediate-frequency gain analog signal that will obtain is sent to the second mixing unit.
The second mixing unit is used for second local oscillation signal that sends by the local oscillator unit, Adaptive Anti-jamming intermediate-frequency gain analog signal is carried out upconversion process after, the anti-interference radiofrequency signal that obtains is sent to outside satellite receiving instrument.
In sum, self adaptation zeroing antenna system of the present invention forms antenna null by direction and the frequency characteristic of adjusting antenna, at first from spatial domain filtering part interference signal; Secondly, the bandpass filtering effect of the noise reduction of self adaptation zeroing antenna system of the present invention by amplifying unit and amplification, the filter unit a part of interference signal of filtering again; Again, Adaptive Anti-jamming processing module in the self adaptation of the present invention zeroing antenna system is handled, behind the further filtering interference signals of difference method, has been improved stability, anti-interference and the receiving sensitivity of self adaptation zeroing antenna system of the present invention by automatic gain.The integrated level of each part is all very high in the self adaptation zeroing antenna system of the present invention, so its size is less.In addition, self adaptation zeroing antenna system of the present invention is when supply power voltage is 12V, and its power consumption only is 15W, so its power consumption is less.
Description of drawings
Fig. 1 is the composition structural representation of self adaptation zeroing antenna system of the present invention.
Fig. 2 is the composition structural representation of self adaptation zeroing antenna system embodiment of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Fig. 1 is the composition structural representation of self adaptation zeroing antenna system of the present invention.As shown in Figure 1, self adaptation zeroing antenna system of the present invention comprises: antenna element 1, amplifying unit 2, local oscillator unit 3, filter unit 4, Adaptive Anti-jamming processing module 5, the first mixing unit 6, the second mixing unit 7; Wherein,
Antenna element 1 is used for directivity and frequency characteristic according to antenna self, and the band that receives outside satellite emission disturbs radiofrequency signal, and will be with and disturb radiofrequency signal to be sent to amplifying unit 2.
Amplifying unit 2, the band that is used to antenna element 1 to send disturb radiofrequency signal to fall hot-tempered processing successively, amplify and handle, and the hot-tempered gain signal that falls that will obtain is sent to the first mixing unit 6.
Local oscillator unit 3 is used for generating first local oscillation signal, second local oscillation signal, and first local oscillation signal, second local oscillation signal is sent to the first mixing unit 6, the second mixing unit 7 respectively.
The first mixing unit 6 is used for first local oscillation signal by 3 transmissions of local oscillator unit, and the hot-tempered gain signal that falls that amplifying unit 2 is sent carries out down-converted, and the band that will obtain disturbs intermediate-freuqncy signal to be sent to filter unit 4.
Filter unit 4 after the band interference intermediate-freuqncy signal of the first mixing unit, 6 transmissions is carried out bandpass filtering treatment, is sent to Adaptive Anti-jamming processing module 5 with the bandpass filtering intermediate-freuqncy signal.
Adaptive Anti-jamming processing module 5 is used for the bandpass filtering intermediate-freuqncy signal that filter unit 4 sends is carried out automatic gain processing, mould/number conversion processing successively, obtains the intermediate-frequency gain digital signal; After adopting difference method to remove interference signal in the intermediate-frequency gain digital signal, the anti-interference intermediate-frequency gain digital signal that obtains is carried out D/A switch handle, and the anti-interference intermediate-frequency gain analog signal that will obtain is sent to the second mixing unit 7.
The second mixing unit is used for second local oscillation signal that sends by the local oscillator unit, Adaptive Anti-jamming intermediate-frequency gain analog signal is carried out upconversion process after, the anti-interference radiofrequency signal that obtains is sent to outside satellite receiving instrument.
Among the present invention, described automatic gain is handled by automatic gain controller and is realized, its gain size is realized automatically by the size of automatic gain controller according to the bandpass filtering intermediate-freuqncy signal.
Among the present invention, adopting the difference method filtering interference signals is prior art, repeats no more herein.
The second mixing unit 7 is used for second local oscillation signal that sends by local oscillator unit 3, Adaptive Anti-jamming intermediate-frequency gain analog signal is carried out upconversion process after, the anti-interference radiofrequency signal that obtains is sent to outside satellite receiving instrument.
Among the present invention, the wideband gain ranging of the anti-interference radiofrequency signal after handling through the second mixing unit 7 is 40db～60db.
In a word, self adaptation zeroing antenna system of the present invention forms antenna null by direction and the frequency characteristic of adjusting antenna, at first from spatial domain filtering part interference signal; Secondly, the bandpass filtering effect of the noise reduction of self adaptation zeroing antenna system of the present invention by amplifying unit and amplification, the filter unit a part of interference signal of filtering again; Again, Adaptive Anti-jamming processing module in the self adaptation of the present invention zeroing antenna system is handled, behind the further filtering interference signals of difference method, has been improved stability, anti-interference and the receiving sensitivity of self adaptation zeroing antenna system of the present invention by automatic gain.The integrated level of each part is all very high in the self adaptation zeroing antenna system of the present invention, so its size is less.In addition, self adaptation zeroing antenna system of the present invention is when supply power voltage is 12V, and its power consumption only is 15W, so its power consumption is less.
Fig. 2 is the composition structural representation of self adaptation zeroing antenna system embodiment of the present invention.As shown in Figure 2, antenna element 1 comprises first antenna 11, second antenna 12, ..., the n antenna, amplifying unit 2 comprises first low noise amplifier 21, second low noise amplifier 22, ..., n low noise amplifier 2n, filter unit 4 comprises first band pass filter 41, second band pass filter 42, ..., n band pass filter 4n, first local oscillation signal, second local oscillation signal is the n road, the first mixing unit 6 comprises first subtracter 61, second subtracter 62, ..., n subtracter 6n, the second mixing unit 7 comprises first adder 71, second subtracter 72, ..., n adder 7n; Wherein, first antenna 11, first low noise amplifier 21, the first via in first local oscillation signal, first band pass filter 41, the first via in second local oscillation signal, first subtracter 61, first adder 71 is corresponding one by one, second antenna 12, second low noise amplifier 22, in first local oscillation signal the second tunnel, second band pass filter 42, in second local oscillation signal the second tunnel 1, second subtracter 62, second subtracter 72 is corresponding one by one, ..., n antenna 1n, n low noise amplifier 2n, n road in first local oscillation signal, n band pass filter 4n, n road in second local oscillation signal, n subtracter 6n, n adder 7n is corresponding one by one; N is natural number.
Among the present invention, it is 1575MHz ± 2MHz, 1561MHz ± 2MHz, 1268MHZ ± 2MHz that described band disturbs the frequency of radiofrequency signal, it is 4MHz～26MHz that described band disturbs the frequency of intermediate-freuqncy signal, and the frequency of described anti-interference radiofrequency signal is 1575MHz ± 2MHz, 1561MHz ± 2MHz, 1268MHZ ± 2MHz.In the practical application, self adaptation of the present invention zeroing antenna not only can be applied in the radiofrequency signal receiving system of multiband of single satellite emission, also can be applied in the radiofrequency signal receiving system of multiband of a plurality of satellites emissions.
In sum, more than be preferred embodiment of the present invention only, be not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a self adaptation zeroing antenna system is characterized in that described antenna system comprises: antenna element, amplifying unit, local oscillator unit, filter unit, Adaptive Anti-jamming processing module, the first mixing unit, the second mixing unit; Wherein,
Antenna element is used for directivity and frequency characteristic according to antenna, and the band that receives outside satellite emission disturbs radiofrequency signal, and will be with and disturb radiofrequency signal to be sent to amplifying unit;
Amplifying unit, the band that is used to antenna element to send disturb radiofrequency signal to fall hot-tempered processing successively, amplify and handle, and the hot-tempered gain signal that falls that will obtain is sent to the first mixing unit;
The local oscillator unit is used for generating first local oscillation signal, second local oscillation signal, and first local oscillation signal, second local oscillation signal is sent to the first mixing unit, the second mixing unit respectively;
The first mixing unit is used for first local oscillation signal by the transmission of local oscillator unit, and the hot-tempered gain signal that falls that amplifying unit is sent carries out down-converted, and the band that will obtain disturbs intermediate-freuqncy signal to be sent to filter unit;
Filter unit, the band that is used for that the first mixing unit is sent is sent to the Adaptive Anti-jamming processing module with the bandpass filtering intermediate-freuqncy signal after disturbing intermediate-freuqncy signal to carry out bandpass filtering treatment;
The Adaptive Anti-jamming processing module is used for the bandpass filtering intermediate-freuqncy signal that filter unit sends is carried out automatic gain processing, mould/number conversion processing successively, obtains the intermediate-frequency gain digital signal; After adopting difference method to remove interference signal in the intermediate-frequency gain digital signal, the anti-interference intermediate-frequency gain digital signal that obtains is carried out D/A switch handle, and the anti-interference intermediate-frequency gain analog signal that will obtain is sent to the second mixing unit;
The second mixing unit is used for second local oscillation signal that sends by the local oscillator unit, Adaptive Anti-jamming intermediate-frequency gain analog signal is carried out upconversion process after, the anti-interference radiofrequency signal that obtains is sent to outside satellite receiving instrument.
2. self adaptation according to claim 1 zeroing antenna system, it is characterized in that, described antenna element comprises n antenna, described amplifying unit comprises n low noise amplifier, described filter unit comprises n band pass filter, first local oscillation signal, second local oscillation signal are the n road, and the described first mixing unit comprises n subtracter, and the described second mixing unit comprises n adder; Wherein, n antenna, a n low noise amplifier, a n band pass filter, the n road of first local oscillation signal, the n road of second local oscillation signal, a n subtracter, a n adder are distinguished corresponding one by one; N is natural number.
3. self adaptation according to claim 1 zeroing antenna system, it is characterized in that, it is 1575MHz ± 2MHz, 1561MHz ± 2MHz, 1268MHZ ± 2MHz that described band disturbs the frequency of radiofrequency signal, it is 4MHz～26MHz that described band disturbs the frequency of intermediate-freuqncy signal, and the frequency of described anti-interference radiofrequency signal is 1575MHz ± 2MHz, 1561MHz ± 2MHz, 1268MHZ ± 2MHz.
4. self adaptation zeroing antenna system according to claim 1 is characterized in that the wideband gain ranging of described anti-interference radiofrequency signal is 40db～60db.
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