Patents by Inventor Chunyi Song
Chunyi Song has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240004032Abstract: The embodiment of the present disclosure provides a deep neural network (DNN)-based multi-target constant false alarm rate (CFAR) detection method. The method includes: obtaining target values to be measured based on radar IF (IF) signals to be detected, the target values to be measured including a measured frequency value and a measured intensity value of the radar IF signals; obtaining peak sequences based on the target values to be measured; generating a target detection result by processing the peak sequences based on a DNN detector, the DNN detector being a machine learning model; generating approximated maximum likelihood estimation (AMLE) of a scale parameter based on an approximated maximum likelihood estimator; generating a false alarm adjustment threshold based on a preset false alarm rate and the AMLE; and generating a constant false alarm detection result by processing the target detection result based on the false alarm adjustment threshold.Type: ApplicationFiled: August 17, 2023Publication date: January 4, 2024Applicants: ZHEJIANG UNIVERSITY, DONGHAI LABORATORYInventors: Chunyi SONG, Zhihui CAO, Zhiwei XU, Yuying SONG, Fuyuan AI, Jingxuan WU
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Publication number: 20230378909Abstract: The present disclosure provides a voltage controlled oscillator for flipped and complementary low noise. The voltage controlled oscillator includes a first resonant cavity, a second resonant cavity, and an associated circuit. The associated circuit is configured to connect the first resonant cavity and the second resonant cavity in series and couple the first resonant cavity and the second resonant cavity. A resonant frequency of the first resonant cavity and a resonant frequency of the second resonant cavity satisfy a first preset condition.Type: ApplicationFiled: June 14, 2023Publication date: November 23, 2023Applicant: ZHEJIANG UNIVERSITYInventors: Zhiwei XU, Quanyong LI, Jiangbo CHEN, Likang DU, Shengjie WANG, Chunyi SONG
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Patent number: 11764864Abstract: The present disclosure discloses an adaptive satellite-aiming method for a low-orbit mobile satellite communication network. The method first receives signals through an array antenna, estimates an offset angle between an array antenna and a satellite beam using a MUSIC-based angle estimation method; then, based on the estimated offset angle, tracks a satellite direction using the adaptive coupling model and achieves tracking and alignment of an antenna direction based on feature parameters extracted during a tracking process; finally, based on the obtained feature parameters, adjusts parameters in the MUSIC-based angle estimation method, and repeats the above steps, to achieve real-time estimation of the offset angle and real-time tracking and alignment of the antenna direction.Type: GrantFiled: September 4, 2019Date of Patent: September 19, 2023Assignee: ZHEJIANG UNIVERSITYInventors: Chunyi Song, Qin Chen, Yuying Xu, Zhiwei Xu
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Patent number: 11705908Abstract: The present disclosure discloses an on-chip synchronous self-repairing system based on a low-frequency reference signal. The system adopts a dual-input PLL stellate coupled structure or a dual-input PLL butterfly-shaped coupled structure, and delay of the whole loop is made to be an integral multiple of the reference signal by synchronizing the transmitted reference signal with the received reference signal, so as to ensure synchronization of local oscillation signal of each IC chip. The transmission wire based on an adjustable left-handed material is used as a delay wire to connect the dual-input PLL, thereby achieving low loss and reducing the physical distance of the delay wire. The system has the advantages of small area, low loss, strong adaptability and strict synchronization in various environments.Type: GrantFiled: April 9, 2020Date of Patent: July 18, 2023Assignee: ZHEJIANG UNIVERSITYInventors: Zhiwei Xu, Shengjie Wang, Jiabing Liu, Liang Qiu, Yue Gong, Kailong Zhao, Chunyi Song
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Publication number: 20230216210Abstract: The present disclosure provides a method for generate array element excitation of a conformal array based on an iterative algorithm, the method comprises obtaining a first index of a pattern of an array antenna by a processor; obtaining multiple optimization objectives according to design indexes of the array antenna by the processor; based on the first index, iteratively determining, by the processor, a first array element excitation satisfying a dynamic range ratio (DRR) of an array element excitation amplitude under the first index through a preset conversion relationship and a preset approach; based on the first array element excitation, obtaining, by the processor, a second array element excitation satisfying the multiple optimization objectives under a constraint of the DRR of the array element excitation amplitude through a solution algorithm; based on the second array element excitation, the design indexes, and basic parameters, generating, by the processor, the array antenna, the basic parameters incType: ApplicationFiled: March 13, 2023Publication date: July 6, 2023Applicant: ZHEJIANG UNIVERSITYInventors: Chunyi SONG, Zhiwei XU, Xin WANG, Dingke YU, Wenwei FANG, Huan LI
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Publication number: 20230155670Abstract: The present disclosure discloses an adaptive satellite-aiming method for a low-orbit mobile satellite communication network. The method first receives signals through an array antenna, estimates an offset angle between an array antenna and a satellite beam using a MUSIC-based angle estimation method; then, based on the estimated offset angle, tracks a satellite direction using the adaptive coupling model and achieves tracking and alignment of an antenna direction based on feature parameters extracted during a tracking process; finally, based on the obtained feature parameters, adjusts parameters in the MUSIC-based angle estimation method, and repeats the above steps, to achieve real-time estimation of the offset angle and real-time tracking and alignment of the antenna direction.Type: ApplicationFiled: September 4, 2019Publication date: May 18, 2023Inventors: Chunyi SONG, Qin CHEN, Yuying XU, Zhiwei XU
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Patent number: 11641207Abstract: Disclosed is a fast lock phase-locked loop circuit for avoiding cycle slip, which belongs to the technical field of integrated circuits. The fast lock phase-locked loop circuit includes a phase frequency detector, a charge pump, an intermediate stage circuit, a loop filter, a voltage-controlled oscillator and a frequency divider. The phase frequency detector, the charge pump, the intermediate stage circuit, the loop filter and the voltage-controlled oscillator are connected in sequence; an output OUT end of the voltage-controlled oscillator is connected with an input IN end of frequency divider, and an output OUT end of the frequency divider is connected with an input IN end of the phase frequency detector to form a feedback path. The output clock frequency of the VCO and the expected frequency, i.e., the reference clock frequency and the feedback clock frequency, are prevented from being too close when the loop is started.Type: GrantFiled: February 10, 2022Date of Patent: May 2, 2023Assignee: ZHEJIANG UNIVERSITYInventors: Zhiwei Xu, Jiangbo Chen, Jiabing Liu, Hui Nie, Zhihao Lv, Chunyi Song
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Patent number: 11624817Abstract: The present disclosure provides a method for conformal array pattern synthesis based on a solution space pruning particle swarm optimization algorithm (PSO), the method comprises taking a suppression index of a peak side lobe level (SLL) as a first index, obtaining the first array element excitation satisfying the first index under the constraint of the dynamic range ratio (DRR) of the array element excitation amplitude through iterations; obtaining a second array element excitation satisfying the multiple optimization objectives under the constraint of the DRR of the array element excitation amplitude by a solution algorithm according to the first array element excitation.Type: GrantFiled: May 30, 2022Date of Patent: April 11, 2023Assignee: ZHEJIANG UNIVERSITYInventors: Chunyi Song, Xin Wang, Dingke Yu, Yuzhang Xi, Wenwei Fang, Zhiwei Xu, Huan Li
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Patent number: 11463096Abstract: Disclosed is a zero-delay phase-locked loop frequency synthesizer based on multi-stage synchronization, which belongs to the technical field of integrated circuits. The zero-delay phase-locked loop frequency synthesizer comprises: a phase frequency detector, a charge pump, a loop pass filter, a voltage control oscillator and a multi-stage synchronization divider, wherein the phase frequency detector, the charge pump, the loop pass filter and the voltage control oscillator are connected in sequence; an output OUT of the voltage control oscillator is connected to an input IN of the multi-stage synchronization divider; and an output OUT of the multi-stage synchronization divider is connected to an input IN of the phase frequency detector, so as to form a feedback path.Type: GrantFiled: September 30, 2021Date of Patent: October 4, 2022Assignee: ZHEJIANG UNIVERSITYInventors: Zhiwei Xu, Jiangbo Chen, Jiabing Liu, Hui Nie, Kaijie Ding, Chunyi Song
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Publication number: 20220308150Abstract: Disclosed is a method for direction-of-arrival estimation based on sparse reconstruction in the presence of gain-phase error, which comprises the following steps: firstly, estimating a noise power and an gain error from an array received signal by adopting a characteristic decomposition method; then, based on a compensated covariance matrix, transforming a direction-of-arrival estimation problem into a non-convex optimization problem in a sparse frame by a method of sparse reconstruction; finally, estimating a grid angle and a deviation angle by using an alternate optimization method. This estimation method can effectively eliminate the influence of a phase error in direction-of-arrival estimation, and has better adaptability, which improves the resolution and estimation accuracy of the algorithm.Type: ApplicationFiled: June 1, 2022Publication date: September 29, 2022Inventors: Chunyi SONG, Dingke YU, Qin CHEN, Yuzhang XI, Xin WANG, Wenwei FANG, Zhiwei XU, Bing LAN, Huan LI
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Publication number: 20220311444Abstract: Disclosed is a fast lock phase-locked loop circuit for avoiding cycle slip, which belongs to the technical field of integrated circuits. The fast lock phase-locked loop circuit includes a phase frequency detector, a charge pump, an intermediate stage circuit, a loop filter, a voltage-controlled oscillator and a frequency divider. The phase frequency detector, the charge pump, the intermediate stage circuit, the loop filter and the voltage-controlled oscillator are connected in sequence; an output OUT end of the voltage-controlled oscillator is connected with an input IN end of frequency divider, and an output OUT end of the frequency divider is connected with an input IN end of the phase frequency detector to form a feedback path. The output clock frequency of the VCO and the expected frequency, i.e., the reference clock frequency and the feedback clock frequency, are prevented from being too close when the loop is started. (FIG.Type: ApplicationFiled: February 10, 2022Publication date: September 29, 2022Inventors: Zhiwei XU, Jiangbo CHEN, Jiabing LIU, Hui NIE, Zhihao LV, Chunyi SONG
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Publication number: 20220308163Abstract: Disclosed is a multitarget constant false alarm rate detection method based on the signal proxy, which belongs to the technical field of radar constant false alarm rate detection. The method realizes target detection by utilizing the correlation between linear measurements of the radar intermediate frequency signal and the sensing matrix. To achieve a desired false alarm rate, the method determines the threshold by estimating the distributed parameters of the reduced sample set obtained by removing the detected targets from the original sample set. The method provided by the present disclosure can adapt to the sparsity of the signals, realize target detection without relying on the pre-estimated environmental background level, and effectively mitigate the multitarget shadowing effect.Type: ApplicationFiled: June 8, 2022Publication date: September 29, 2022Inventors: Chunyi SONG, Zhihui CAO, Junjie LI, Yuying SONG, Zhiwei XU
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Publication number: 20220299623Abstract: The present disclosure provides a method for conformal array pattern synthesis based on a solution space pruning particle swarm optimization algorithm (PSO), the method comprises taking a suppression index of a peak side lobe level (SLL) as a first index, obtaining the first array element excitation satisfying the first index under the constraint of the dynamic range ratio (DRR) of the array element excitation amplitude through iterations; obtaining a second array element excitation satisfying the multiple optimization objectives under the constraint of the DRR of the array element excitation amplitude by a solution algorithm according to the first array element excitation.Type: ApplicationFiled: May 30, 2022Publication date: September 22, 2022Applicant: ZHEJIANG UNIVERSITYInventors: Chunyi SONG, Xin WANG, Dingke YU, Yuzhang XI, Wenwei FANG, Zhiwei XU, Huan LI
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Publication number: 20220286199Abstract: The present disclosure provides a method for predicting co-channel interference (CCI) of a satellite-to-ground downlink under a low-orbit satellite constellation. The method includes: obtaining CCI values in a first time period and CCI values in a second time period; constructing a CCI model based on the CCI values in the first time period and a dropout wavelet neural network (WNN); updating parameters of the CCI model; inputting the CCI values in the second time period into an updated CCI model to obtain accuracy; determining whether the accuracy is greater than an accuracy threshold; and if the accuracy is greater than the accuracy threshold, reconstructing the CCI model; or if the accuracy is less than or equal to the accuracy threshold, outputting the updated CCI model; and predicting CCI values of each link at a next moment based on the updated CCI model.Type: ApplicationFiled: June 12, 2020Publication date: September 8, 2022Inventors: Chunyi Song, Yuying Xu, Qin Chen, Zhiwei Xu
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Publication number: 20220052695Abstract: The present disclosure discloses an on-chip synchronous self-repairing system based on a low-frequency reference signal. The system adopts a dual-input PLL stellate coupled structure or a dual-input PLL butterfly-shaped coupled structure, and delay of the whole loop is made to be an integral multiple of the reference signal by synchronizing the transmitted reference signal with the received reference signal, so as to ensure synchronization of local oscillation signal of each IC chip. The transmission wire based on an adjustable left-handed material is used as a delay wire to connect the dual-input PLL, thereby achieving low loss and reducing the physical distance of the delay wire. The system has the advantages of small area, low loss, strong adaptability and strict synchronization in various environments.Type: ApplicationFiled: April 9, 2020Publication date: February 17, 2022Inventors: Zhiwei XU, Shengjie WANG, Jiabing LIU, Liang QIU, Yue GONG, Kailong ZHAO, Chunyi SONG
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Publication number: 20220021394Abstract: Disclosed is a zero-delay phase-locked loop frequency synthesizer based on multi-stage synchronization, which belongs to the technical field of integrated circuits. The zero-delay phase-locked loop frequency synthesizer comprises: a phase frequency detector, a charge pump, a loop pass filter, a voltage control oscillator and a multi-stage synchronization divider, wherein the phase frequency detector, the charge pump, the loop pass filter and the voltage control oscillator are connected in sequence; an output OUT of the voltage control oscillator is connected to an input IN of the multi-stage synchronization divider; and an output OUT of the multi-stage synchronization divider is connected to an input IN of the phase frequency detector, so as to form a feedback path.Type: ApplicationFiled: September 30, 2021Publication date: January 20, 2022Inventors: Zhiwei XU, Jiangbo CHEN, Jiabing LIU, Hui NIE, Kaijie DING, Chunyi SONG
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Patent number: 10634930Abstract: An aerial imaging element in a teleprompter system, a teleprompter and a teleprompter device includes one or more optical elements that bend incident light of an image and form a real image in the air, and further includes one or more translucent reflectors. The aerial imaging element is convenient to manufacture and is low in cost; the aerial imaging element enables an image displayed therein to form a real image in the air, which can be seen only at a certain angle. The aerial imaging element is applied to the prompt of aspects, such as news broadcasting and lecture giving, which is convenient and does not influence viewing or video recording at the scene.Type: GrantFiled: November 28, 2018Date of Patent: April 28, 2020Assignee: Feixiang Technology Co., Ltd.Inventors: Bing Zhang, Chunyi Song, Lin Shan, Kan Wang
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Publication number: 20190094563Abstract: An aerial imaging element in a teleprompter system, a teleprompter and a teleprompter device includes one or more optical elements that bend incident light of an image and form a real image in the air, and further includes one or more translucent reflectors. The aerial imaging element is convenient to manufacture and is low in cost; the aerial imaging element enables an image displayed therein to form a real image in the air, which can be seen only at a certain angle. The aerial imaging element is applied to the prompt of aspects, such as news broadcasting and lecture giving, which is convenient and does not influence viewing or video recording at the scene.Type: ApplicationFiled: November 28, 2018Publication date: March 28, 2019Inventors: Bing Zhang, Chunyi Song, Lin Shan, Kan Wang
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Patent number: 8929315Abstract: One wireless communication network 3 determines an interference degree with the corresponding other wireless communication network 3 for each channel by accessing a CMDB 2 storing positional information, channel information, and respective coexistence methods of other wireless communication networks 3, selects other wireless communication network 3 to coexist, a coexisting channel, and a coexisting method thereof based on the interference degree for each determined channel, and reflects the selected network, channel, and coexistence method to the CMDB 2, and transmits a signal for requesting coexistence with respect to selected wireless communication network, to the CMDB 2, and the selected wireless communication network 3 performs a control for coexistence in the communication space between one wireless communication network and the selected wireless communication network based on the channel reflected to the CMDB 2 and the coexisting method thereof.Type: GrantFiled: February 28, 2011Date of Patent: January 6, 2015Assignee: National Institute of Information and Communications TechnologyInventors: Mohammad Azizur Rahman, Gabriel Porto Villardi, Zhou Lan, Tuncer Baykas, Chang-Woo Pyo, Chunyi Song, Chin-Sean Sum, Junyi Wang, Hiroshi Harada