{"title":"Effect of interchannel mismatches upon adaptive array cancellation","authors":"R. Nitzberg","doi":"10.1109/NRC.1989.47627","DOIUrl":null,"url":null,"abstract":"The author analyzes the effect of interchannel mismatch on adaptive array interference cancellation for an arbitrary number of channels and arbitrary bandwidth waveforms for a partially adaptive array used in a multiple sidelobe canceller (MSLC). A general equation giving the residue power as a function of the interchannel mismatch, the radar bandwidth, and the array parameters is derived. To aid in clarifying the dependence of cancellation on interchannel errors, a Taylor series expansion is obtained. It shows that the ratio of adapted power to the unadapted main power is greater than 1- mu (where mu is the average interchannel mismatch correlation coefficient) for all interferer locations and power levels and any number of auxiliary antennas. The special, simple-geometry case of narrowband orthogonal direction vectors is evaluated. For this case, the ratio of adapted to unadapted power is approximately equal to (1- mu )(1+K/N) for K interferers and N auxiliary antennas.<<ETX>>","PeriodicalId":167059,"journal":{"name":"Proceedings of the IEEE National Radar Conference","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1989-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the IEEE National Radar Conference","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/NRC.1989.47627","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
The author analyzes the effect of interchannel mismatch on adaptive array interference cancellation for an arbitrary number of channels and arbitrary bandwidth waveforms for a partially adaptive array used in a multiple sidelobe canceller (MSLC). A general equation giving the residue power as a function of the interchannel mismatch, the radar bandwidth, and the array parameters is derived. To aid in clarifying the dependence of cancellation on interchannel errors, a Taylor series expansion is obtained. It shows that the ratio of adapted power to the unadapted main power is greater than 1- mu (where mu is the average interchannel mismatch correlation coefficient) for all interferer locations and power levels and any number of auxiliary antennas. The special, simple-geometry case of narrowband orthogonal direction vectors is evaluated. For this case, the ratio of adapted to unadapted power is approximately equal to (1- mu )(1+K/N) for K interferers and N auxiliary antennas.<>