Zhang Qiang, W. XianRong, Fu Yan, Rao Yunhua, Gong Ziping
China Digital Radio (CDR) broadcasting is a new standard of digital audio broadcasting of FM frequency (87-108 MHz) based on our research and development efforts. It is compatible with the frequency spectrum in analog FM radio and satisfies the requirements for smooth transition from analog to digital signal in FM broadcasting in China. This paper focuses on the signal characteristics and processing methods of radio-based passive radar. The signal characteristics and ambiguity function of a passive radar illumination source are analyzed. The adverse effects on the target detection of the side peaks owing to cyclic prefix, the Doppler ambiguity strips because of signal synchronization, and the range of side peaks resulting from the signal discontinuous spectrum are then studied. Finally, methods for suppressing these side peaks are proposed and their effectiveness is verified by simulations.
{"title":"Ambiguity Function Analysis and Processing for Passive Radar Based on CDR Digital Audio Broadcasting","authors":"Zhang Qiang, W. XianRong, Fu Yan, Rao Yunhua, Gong Ziping","doi":"10.12000/JR14050","DOIUrl":"https://doi.org/10.12000/JR14050","url":null,"abstract":"China Digital Radio (CDR) broadcasting is a new standard of digital audio broadcasting of FM frequency (87-108 MHz) based on our research and development efforts. It is compatible with the frequency spectrum in analog FM radio and satisfies the requirements for smooth transition from analog to digital signal in FM broadcasting in China. This paper focuses on the signal characteristics and processing methods of radio-based passive radar. The signal characteristics and ambiguity function of a passive radar illumination source are analyzed. The adverse effects on the target detection of the side peaks owing to cyclic prefix, the Doppler ambiguity strips because of signal synchronization, and the range of side peaks resulting from the signal discontinuous spectrum are then studied. Finally, methods for suppressing these side peaks are proposed and their effectiveness is verified by simulations.","PeriodicalId":37701,"journal":{"name":"Journal of Radars","volume":"1 1","pages":"702-710"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"65931125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.3724/SP.J.1300.2014.13147
Chuanlu Huang, Chao Kun, Yun-zhi Mao
: An important bottleneck in spatial spectrum estimation theory is array errors. A new error self-calibration method is presented on the basis of active error calibration and online self-calibration theories. An algorithm combining Direction Of Arrival (DOA) estimation and array complex gain error calibration is developed using an auxiliary source without accurate spatial location information and numerical optimization calculation; the error calibration parameters can be used in the following spatial spectrum estimation. The method has a higher veracity than the active correction algorithm and is an offline calculation procedure, having the advantage of small computation amount, similar to the online self-calibration method, and avoiding accurate spatial location information in classical active calibration method.
{"title":"Error Self-calibration Method in Spatial Spectrum Estimation","authors":"Chuanlu Huang, Chao Kun, Yun-zhi Mao","doi":"10.3724/SP.J.1300.2014.13147","DOIUrl":"https://doi.org/10.3724/SP.J.1300.2014.13147","url":null,"abstract":": An important bottleneck in spatial spectrum estimation theory is array errors. A new error self-calibration method is presented on the basis of active error calibration and online self-calibration theories. An algorithm combining Direction Of Arrival (DOA) estimation and array complex gain error calibration is developed using an auxiliary source without accurate spatial location information and numerical optimization calculation; the error calibration parameters can be used in the following spatial spectrum estimation. The method has a higher veracity than the active correction algorithm and is an offline calculation procedure, having the advantage of small computation amount, similar to the online self-calibration method, and avoiding accurate spatial location information in classical active calibration method.","PeriodicalId":37701,"journal":{"name":"Journal of Radars","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70075366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-02-01DOI: 10.3724/SP.J.1300.2014.13094
Jianbo Du, Dao-jing Li, Ma Meng
: In this study, the performance of three phase-modulated signals used in airborne Synthetic Aperture Ladar (SAL) is investigated. The transmitting and receiving modes and imaging processing methods for these signals are studied. Considering that the swath of the airborne SAL is very narrow, in order to reduce the AD sampling rate of the wideband signal, a “phase-dechirping” receiving mode is proposed for the phase-modulated signal based on the Linear Frequency Modulation (LFM) signal. The imaging simulation results for these three phase-modulated signals validate the effectiveness of the proposed method.
{"title":"Performance Analysis and Image Processing of Phase-modulated Signal on Airborne Synthetic Aperture Ladar","authors":"Jianbo Du, Dao-jing Li, Ma Meng","doi":"10.3724/SP.J.1300.2014.13094","DOIUrl":"https://doi.org/10.3724/SP.J.1300.2014.13094","url":null,"abstract":": In this study, the performance of three phase-modulated signals used in airborne Synthetic Aperture Ladar (SAL) is investigated. The transmitting and receiving modes and imaging processing methods for these signals are studied. Considering that the swath of the airborne SAL is very narrow, in order to reduce the AD sampling rate of the wideband signal, a “phase-dechirping” receiving mode is proposed for the phase-modulated signal based on the Linear Frequency Modulation (LFM) signal. The imaging simulation results for these three phase-modulated signals validate the effectiveness of the proposed method.","PeriodicalId":37701,"journal":{"name":"Journal of Radars","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70075139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-15DOI: 10.3724/SP.J.1300.2013.13041
F. Wang, Jing Li, J. Liu, Xi-xin Chen, Weijun Long
Broadband Digital Beam Forming (DBF) is a key technique for the realization of Digital Array Radar (DAR). We propose the method of combination realization of the channel equalization and DBF time delay filter function by using the adaptive sample matrix inversion algorithm. The broadband DBF function is realized on a new DBF module based on parallel fiber optic engines and Field Program Gate Array (FPGA). When used in some radar products, good performance is achieved.
{"title":"System Realization of Broadband Digital Beam Forming for Digital Array Radar: System Realization of Broadband Digital Beam Forming for Digital Array Radar","authors":"F. Wang, Jing Li, J. Liu, Xi-xin Chen, Weijun Long","doi":"10.3724/SP.J.1300.2013.13041","DOIUrl":"https://doi.org/10.3724/SP.J.1300.2013.13041","url":null,"abstract":"Broadband Digital Beam Forming (DBF) is a key technique for the realization of Digital Array Radar (DAR). We propose the method of combination realization of the channel equalization and DBF time delay filter function by using the adaptive sample matrix inversion algorithm. The broadband DBF function is realized on a new DBF module based on parallel fiber optic engines and Field Program Gate Array (FPGA). When used in some radar products, good performance is achieved.","PeriodicalId":37701,"journal":{"name":"Journal of Radars","volume":"2 1","pages":"314-318"},"PeriodicalIF":0.0,"publicationDate":"2014-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70074329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-15DOI: 10.3724/SP.J.1300.2013.13071
Boyuan Ding, Jinrong Zhong, Conghui Ma, G. Wen
{"title":"SAR Target Reconstruction Visualization Enhancement Based on Attributed Scattering Center Model: SAR Target Reconstruction Visualization Enhancement Based on Attributed Scattering Center Model","authors":"Boyuan Ding, Jinrong Zhong, Conghui Ma, G. Wen","doi":"10.3724/SP.J.1300.2013.13071","DOIUrl":"https://doi.org/10.3724/SP.J.1300.2013.13071","url":null,"abstract":"","PeriodicalId":37701,"journal":{"name":"Journal of Radars","volume":"2 1","pages":"499-506"},"PeriodicalIF":0.0,"publicationDate":"2014-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70074483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-15DOI: 10.3724/SP.J.1300.2013.13005
Xuelian Zhong, M. Xiang, Huadong Guo, Ren-yuan Chen
{"title":"Current Development in Airborne Repeat-pass Interferometric Synthetic Aperture Radar: Current Development in Airborne Repeat-pass Interferometric Synthetic Aperture Radar","authors":"Xuelian Zhong, M. Xiang, Huadong Guo, Ren-yuan Chen","doi":"10.3724/SP.J.1300.2013.13005","DOIUrl":"https://doi.org/10.3724/SP.J.1300.2013.13005","url":null,"abstract":"","PeriodicalId":37701,"journal":{"name":"Journal of Radars","volume":"2 1","pages":"367-381"},"PeriodicalIF":0.0,"publicationDate":"2014-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70073802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-15DOI: 10.3724/SP.J.1300.2013.13080
Huang Li, Qing Xia, Cong Yin, W. Wan
{"title":"The Current Status of Research on GNSS-R Remote Sensing Technology in China and Future Development: The Current Status of Research on GNSS-R Remote Sensing Technology in China and Future Development","authors":"Huang Li, Qing Xia, Cong Yin, W. Wan","doi":"10.3724/SP.J.1300.2013.13080","DOIUrl":"https://doi.org/10.3724/SP.J.1300.2013.13080","url":null,"abstract":"","PeriodicalId":37701,"journal":{"name":"Journal of Radars","volume":"2 1","pages":"389-399"},"PeriodicalIF":0.0,"publicationDate":"2014-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70074505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-15DOI: 10.3724/SP.J.1300.2013.13012
Chong Jin-song, Zhou Xiao-zhong
In recent years, Internal Waves (IWs) detection in a Synthetic Aperture Radar (SAR) image has received considerable attention in the area of marine remote sensing. In fact, IWs detection has already become one of the most important marine applications of SAR. Typical research results from home and abroad are reviewed. In this paper, the parameter inversion method of IWs, the effect of different SAR parameters and wind field conditions on IWs imaging, and the 2-dimentional SAR imaging simulation of IWs are introduced and summarized.
{"title":"Survey of Study on Internal Waves Detection in Synthetic Aperture Radar Image: Survey of Study on Internal Waves Detection in Synthetic Aperture Radar Image","authors":"Chong Jin-song, Zhou Xiao-zhong","doi":"10.3724/SP.J.1300.2013.13012","DOIUrl":"https://doi.org/10.3724/SP.J.1300.2013.13012","url":null,"abstract":"In recent years, Internal Waves (IWs) detection in a Synthetic Aperture Radar (SAR) image has received considerable attention in the area of marine remote sensing. In fact, IWs detection has already become one of the most important marine applications of SAR. Typical research results from home and abroad are reviewed. In this paper, the parameter inversion method of IWs, the effect of different SAR parameters and wind field conditions on IWs imaging, and the 2-dimentional SAR imaging simulation of IWs are introduced and summarized.","PeriodicalId":37701,"journal":{"name":"Journal of Radars","volume":"2 1","pages":"406-421"},"PeriodicalIF":0.0,"publicationDate":"2014-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70073598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-15DOI: 10.3724/SP.J.1300.2013.13086
Daojing Li, X. Teng, Zhou-Hao Pan
{"title":"The Concept and Applications of Distributed POS: The Concept and Applications of Distributed POS","authors":"Daojing Li, X. Teng, Zhou-Hao Pan","doi":"10.3724/SP.J.1300.2013.13086","DOIUrl":"https://doi.org/10.3724/SP.J.1300.2013.13086","url":null,"abstract":"","PeriodicalId":37701,"journal":{"name":"Journal of Radars","volume":"54 1","pages":"400-405"},"PeriodicalIF":0.0,"publicationDate":"2014-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70074058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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