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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 9. Отображено 9.
15-07-2009 дата публикации

Self-adapting special interference restraint technology for phased array radar

Номер: CN0101482610A
Автор: WANG YONGLIANG, CHEN HUI, CHEN FENGBO, XIE WENCHONG, WU ZHIWEN, YONGLIANG WANG, HUI CHEN, FENGBO CHEN, WENCHONG XIE, ZHIWEN WU
Принадлежит:

The invention discloses a self-adapting special interference suppressing technology aim at phased array radar. The conventional phased array radar can suppress the noise to inhibit the interference by self-adapting, firstly the interference data received by the radar receiver can be learned then to form a zero point on the interference direction. The zero point depth and width generated by the conventional processing method all can be influenced by the array error and are not suitable for the special interferences, such as the dense cheating interference, the movement interference, the fast transforming clearance type interference or the composite interference and so on complicated interference forms. Adopting the ultra-lower secondary lobe aerial is the most effective anti-interference method, but under the present technology and technological level, the over-high secondary lobe requirement for the phased array aerial is impractical. The invention can implement the estimations of the interference ...

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Номер записи: 1
18-07-2023 дата публикации

Method and device for resisting main lobe suppressing noise interference based on intra-pulse multi-carrier frequency signal radar

Номер: CN116449313A
Автор: CHEN WEI, XIE WENCHONG, WANG YONGLIANG, XIONG YUANYI, LIU CHENGYIN
Принадлежит:

The invention discloses a radar main lobe suppression noise interference resisting method based on intra-pulse multi-carrier frequency signals, and the method comprises the steps: 1, transmitting the intra-pulse multi-carrier frequency signals through a radar, and receiving radar echo signals; wherein the intra-pulse multi-carrier frequency signal is composed of LFM signals with non-overlapped frequencies; step 2, performing frequency domain filtering processing on the radar echo signal, and extracting LFM signals with different frequencies by using orthogonality of each signal frequency; 3, performing spectral analysis on the LFM signals with different frequencies in the step 2 by adopting short-time Fourier transform to obtain a time-frequency spectrogram of the LFM signals; 4, the time-frequency spectrogram in the step 3 is detected, signals with noise characteristics in the time-frequency spectrogram are removed, and signals with time-frequency spectrums being oblique lines are reserved ...

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Номер записи: 2
01-08-2023 дата публикации

Airborne early warning radar interference identification method and device based on deep learning

Номер: CN116520256A
Автор: XIE WENCHONG, XIONG YUANYI, WANG YONGLIANG, CHEN WEI, LIU CHENGYIN
Принадлежит:

The invention relates to the technical field of airborne radars, and provides an airborne early warning radar interference identification method and device based on deep learning. The method comprises the following steps: calculating signal power of each type of interference according to airborne early warning radar echo data; according to the signal power of each type of interference, echo signal vectors of each type of interference are constructed; calculating the minimum variance spectrum of each type of interference according to the echo signal vector of each type of interference; performing data marking on the minimum variance spectrum of each type of interference to generate a training data set, and training the convolutional neural network by using the training data set; and performing interference identification by using the trained convolutional neural network. According to the method, the airborne radar signals are processed in advance to obtain different types of interferences ...

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Номер записи: 3
02-05-2023 дата публикации

Method and device for selecting optimal array element number and array element spacing of end-fire array airborne radar

Номер: CN116047462A
Автор: XIE WENCHONG, CHEN WEI, WANG YONGLIANG, XIONG YUANYI, LIU CHENGYIN
Принадлежит:

The invention relates to a method for selecting the optimal array element number and array element spacing of an end-fire array airborne radar, and the method comprises the steps: 1, calculating the gain of an end-fire array antenna under the conditions of different array element numbers and array element spacing, and constructing the clutter noise echo data of the airborne radar; 2, carrying out clutter suppression processing on the data constructed in the step 1 by adopting space-time adaptive processing; 3, the clutter residual power processed in the step 2 is compared with target power, and a constant false alarm detection result is obtained; 4, obtaining a distance-speed two-dimensional blind area graph under each group of repetition frequencies by using a detection result in the step 3; step 5, performing multi-frequency detection on the blind area image in the step 4, and calculating a radar detection distance under a fixed clear area proportion; and 6, according to the farthest ...

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Номер записи: 4
08-08-2023 дата публикации

Knowledge-assisted color loading clutter suppression method and device for airborne radar

Номер: CN116559819A
Автор: XIE WENCHONG, XIONG YUANYI, CHEN WEI, LIU CHENGYIN, CHEN FENGBO
Принадлежит:

The invention relates to the technical field of airborne radars, and provides an airborne radar knowledge auxiliary color loading clutter suppression method and device. The method comprises the following steps: processing and estimating a space domain error parameter by using a channel pair of priori knowledge, and constructing a space-time tapering matrix; constructing a prior covariance matrix by using the space-time tapering matrix, and constructing a sample estimation covariance matrix according to a distance unit echo to be detected; constructing an optimization function according to the distance unit echo to be detected, the prior covariance matrix and the sample estimation covariance matrix, and searching by using the optimization function to obtain an optimal color loading coefficient; and according to the color loading coefficient, clutter suppression is carried out on the echo of the distance unit to be detected. According to the method, the maximum likelihood estimation covariance ...

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Номер записи: 5
11-08-2023 дата публикации

Airborne radar refined clutter simulation method and device based on priori knowledge

Номер: CN116577734A
Автор: XIE WENCHONG, LI HU, WANG YONGLIANG, XIONG YUANYI, CHEN WEI
Принадлежит:

The invention relates to a priori knowledge-based airborne radar refined clutter simulation method, which comprises the following steps of: 1, mapping each information point in a geographic database in a radar beam irradiation range into a corresponding distance unit based on priori knowledge and airborne/radar system parameters; 2, clutter scattering coefficients of all the information points are obtained based on prior knowledge, and the distinguishing unit areas of all the information points are calculated; 3, clutter signals of all information points are calculated; 4, performing terrain shielding judgment on each information point; 5, constructing a space-time error matrix by using priori knowledge; and step 6, calculating a final airborne radar clutter signal. The invention further provides a corresponding airborne radar refined clutter simulation device based on priori knowledge.

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Номер записи: 6
22-08-2023 дата публикации

Method and device for designing in-pulse non-uniform large-frequency-offset signal waveform

Номер: CN116626604A
Автор: CHEN WEI, XIE WENCHONG, WANG YONGLIANG, XIONG YUANYI, LIU CHENGYIN
Принадлежит:

The invention discloses an intra-pulse non-uniform large-frequency-offset signal waveform design method. The method comprises the steps that 1, an airborne early warning radar transmits an intra-pulse non-uniform large-frequency-offset signal and receives a target echo signal; 2, performing frequency mixing and matched filtering processing on the target echo signal, and establishing a carrier frequency domain steering vector of the echo signal; 3, constructing an expression of a carrier frequency domain static directional diagram according to the carrier frequency domain steering vector of the echo signal in the step 2, and further determining an optimization target function; 4, designing a fitness function optimization model according to the optimization objective function in the step 3 and other constraint conditions; and 5, solving the fitness function optimization model in the step 4 by using a genetic algorithm to obtain an individual with a minimum fitness function value, and taking ...

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Номер записи: 7
30-06-2023 дата публикации

Airborne early warning radar space-time frequency adaptive main lobe deception jamming resisting method and device

Номер: CN116359857A
Автор: CHEN WEI, XIE WENCHONG, WANG YONGLIANG, XIONG YUANYI, LIU CHENGYIN
Принадлежит:

The invention discloses a space-time frequency self-adaptive main lobe deception jamming resisting method for an airborne early warning radar. The method comprises the steps that the airborne early warning radar transmits an intra-pulse multi-carrier frequency signal and receives a radar echo signal; performing frequency mixing and matched filtering processing on the radar echo signal, extracting echo signals with different frequencies by using the orthogonal characteristic of signal waveforms, and further constructing a receiving signal comprising a target, clutter and interference; constructing a compensation vector according to the real distance of each distance unit, and carrying out carrier frequency domain distance dependence compensation on a received signal containing a target, clutter and interference; constructing a space-time frequency dimension reduction matrix according to the distance section, the angle and the speed of the preset target, and performing space-time frequency ...

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Номер записи: 8
21-11-2012 дата публикации

Self-adapting special interference restraint technology for phased array radar

Номер: CN0101482610B
Автор: HUI CHEN, WENCHONG XIE, YONGLIANG WANG, ZHIWEN WU, FENGBO CHEN, CHEN HUI, XIE WENCHONG, WANG YONGLIANG, WU ZHIWEN, CHEN FENGBO
Принадлежит:

The invention discloses a self-adapting special interference suppressing technology aim at phased array radar. The conventional phased array radar can suppress the noise to inhibit the interference by self-adapting, firstly the interference data received by the radar receiver can be learned then to form a zero point on the interference direction. The zero point depth and width generated by the conventional processing method all can be influenced by the array error and are not suitable for the special interferences, such as the dense cheating interference, the movement interference, the fast transforming clearance type interference or the composite interference and so on complicated interference forms. Adopting the ultra-lower secondary lobe aerial is the most effective anti-interference method, but under the present technology and technological level, the over-high secondary lobe requirement for the phased array aerial is impractical. The invention can implement the estimations of theinterference ...

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Номер записи: 9