欢迎来到天天文库
浏览记录
ID:34843870
大小:192.25 KB
页数:9页
时间:2019-03-12
《Signal Processing at 250 MHz Using.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、238IEEETRANSACTIONSONVERYLARGESCALEINTEGRATION(VLSI)SYSTEMS,VOL.6,NO.2,JUNE1998SignalProcessingat250MHzUsingHigh-PerformanceFPGA'sBrianVonHerzenAbstractÐThispaperdescribesanapplicationinhigh-perform-ofcomplexcomputations.Reconfiguringthecomputeronde-ancesignalprocessingusi
2、ngreconfigurablecomputingengines:mandprovidesauniqueflexibilitythathasnotexistedbefore.a250-MHzcrosscorrelatorforradioastronomy.Experimentalresultsindicatethatcomplementarymetal±oxide±semiconductor(CMOS)fieldprogrammablegatearrays(FPGA's)canper-II.CORRELATIONSPECTROMETERSfor
3、musefulcomputationat250MHz.ThenotionofanªeventhorizonºforFPGA'sleadstocleardesignconstraintsforhigh-Radioastronomersanalyzespectrausinghigh-performancespeedapplicationdevelopers,andcanbeappliedtoavarietyofreal-timecomputers[3].High-frequencyradioastronomy,real-timesignalp
4、rocessingalgorithms.Recentestimatesindicateparticularlymillimeter-waveandsubmillimeterastronomy,thathigherperformanceFPGA'savailableearlyin1998canutilizeswide-bandspectrometerswithatleast1±2GHzofattainspeedsofover300MHzusing20%fewerlogicelementsspectrometerbandwidth.Weaka
5、stronomicalsignalsrequirethancurrentdesigns.TheresultsofthisdesignworkprovideimportantcluesonhowtoimproveFPGAarchitecturesforsignalfull-parallelintegrationonallofthechannelstodetectmeasur-processingathundredsofMHz.Directroutingchannelsbetweenablesignals.Therefore,scanning
6、spectrometersdonotworklogicelementscansignificantlyincreaseperformance.Routingforthisapplication.Acoustoopticspectrometerscanachievearchitectureswithfour-waysymmetryallowforrotationsandthebroadbandwidth,butbecomeproblematicinlargearraysreflectionsofsubcircuitsneededforoptim
7、alpackingdensity.andforspace-borneapplicationswhereadjustmentsoftheExperimentalresultsindicatethatclockbufferingoftenlimitsthetopspeedoftheFPGA.Wavepipeliningofclockdistributionanalogelementsbecomeverydifficult.networkmayimproveFPGAperformance.Anotheralternativeusesaparall
8、eldigitalcorrelatorthatcomputestheautocorrelationfunctionoftheincomingbase-IndexTermsÐCorrelator
此文档下载收益归作者所有