{"title":"Implementation of the corrector of I&Q errors in coherent processor with DSP","authors":"Xinggan Zhang, Zhaoda Zhu","doi":"10.1109/ICICS.1997.647072","DOIUrl":null,"url":null,"abstract":"Modern radars are mostly dependent upon coherent digital signal processing. This paper describes the implementation of a corrector of in-phase and quadrature errors in a coherent processor. The correcting network consists of a combination logic circuit and it can correct the gain and phase imbalances and the bias errors of the in-phase and quadrature channels in coherent signal processing. The correcting coefficients are computed with DSP using a test signal. The image level without correction is about -30 dB if the errors of gain and phase in the coherent processor are 0.5 dB and 1 degree respectively. The experimental results show that the image level is reduced to -50 dB from -30 dB after correcting the errors.","PeriodicalId":71361,"journal":{"name":"信息通信技术","volume":"83 1","pages":"130-132 vol.1"},"PeriodicalIF":0.0000,"publicationDate":"1997-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"信息通信技术","FirstCategoryId":"1093","ListUrlMain":"https://doi.org/10.1109/ICICS.1997.647072","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Modern radars are mostly dependent upon coherent digital signal processing. This paper describes the implementation of a corrector of in-phase and quadrature errors in a coherent processor. The correcting network consists of a combination logic circuit and it can correct the gain and phase imbalances and the bias errors of the in-phase and quadrature channels in coherent signal processing. The correcting coefficients are computed with DSP using a test signal. The image level without correction is about -30 dB if the errors of gain and phase in the coherent processor are 0.5 dB and 1 degree respectively. The experimental results show that the image level is reduced to -50 dB from -30 dB after correcting the errors.