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channel error CORRECTION FOR WIDEBAND SAR-A JOINT MULTIPLE SUBPULSES PROCESSING METHOD

Journal of Electronics(China) 2011年第1期28卷 134-140页

作者： Chen Shuxuan Jiang Limin Xiang Maosheng National Key Lab of Microwave Imaging Technology Institute of Electronics Chinese Academy of Sciences Beijing 100190 China Graduate School of Chinese Academy of Sciences Beijing 100190 China

A novel method,referred to as joint multiple subpulses processing,is developed to calibrate the nonideal transfer function of radio frequency front-end and I/Q imbalance in quadrature modulate/demodulate systems simultaneously,which frequently occur in wideband Synthetic Aperture Radar(SAR) *** on the time-frequency relation of the chirp signal and the analyses of the channel errors in wideband SAR,joint multiple subpulses processing method is adopted to separate the image frequency component due to the I/Q channel ***,the complete description of the channel error is acquired for building the correction function,which is used to correct the radar raw echo in frequency *** validity and capability of this method are demonstrated by the experiments of the channel error correction on the high resolution SAR system with the effective bandwidth of 500 MHz.

关键词： Wideband Synthetic Aperture Radar(SAR) channel error Joint multiple subpulses processing Weighted least squares Correction function

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METHOD FOR ALONG-TRACK DUAL-ANTENNA AIRBORNE RADAR'S GMTI WHEN THE ATENNA error CHANGES PULSE TO PULSE

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Journal of Electronics(China) 2005年第3期22卷 248-254页

作者： NingWei LiaoGuisheng KeyLaboratoryforRadarSignalProcessing XidianUniversityXi＇an710071China

This paper presents a joint method of Doppler Beam Sharpen (DBS) imaging and Signal Subspace Processing (SSP) to achieve Ground Moving Target Indication(GMTI) for along- track dual-antenna airborne radar. When the error of the two antennas (also refers to channels) changes pulse to pulse, the method SSP is used to precisely calibrate the two antennas’ DBS images, then to detect the ground moving targets in the difference image of the two calibrated images. The method DBS-SSP is proved to offer performance improvement on the actually measured data and simulated data.

关键词： Airborne radar channel error Moving Target Indication (MTI) Signal Subspace Processing (SSP)

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维普期刊数据库

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An RFID Tag Identification Protocol Considering Capture Effect

An RFID Tag Identification Protocol Considering Capture Effe...

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2012 International Conference on Networks and Information(ICNI 2012)

作者： Jaeyoung Lee Jongho Park Tae-Jin Lee College of Information and Communication Engineering Sungkyunkwan University

In radio frequency identification （RFID） systems, tag anti-collision is important to mitigate the collision problem. channel error and capture effect may occur due to distance and channel state between a reader and tags and it causes some unidentified tags. Conventional tag anti-collision protocols have been studied under ideal channel condition. In this paper, we propose an efficient tree-based anti-collision protocol considering capture effect. Simulation results show that the proposed tag anti-collision protocol improves performance of RFID systems.

关键词： RFID anti-collision tree-based channel error capture effect

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