简介:AHFreceiverfordatatransmissionbasedonKalmanfilterandchannelestimatorisproposed.Thesimulationresultsshowthattheperformanceoftheproposedschemeisabout2dBbetterthanthatofDecision-FeedbackEqualizerbasedonSquare-RootKalmanAlgorithm(SRKA/DFE)anditscomputationalcomplexityislowerthanthatofMaximumLikelihoodSequenceEstimation(MLSE).
简介:摘 要:LIY1HF井是胜利油田东营凹陷利津洼陷首口页岩油预探水平井,钻探目的是了解东营凹陷利津洼陷南次洼沙三下亚段页岩油含油气性。该井完钻井深5288m,水平位移1688.44m,造斜段井眼大,水平段长1262.48m,井身质量的要求高,施工难度大。通过采用优化钻具组合、优选钻头、井身轨迹控制、三开气制油合成基钻井液体系等钻井技术,克服了沙三段段泥岩易垮塌、卡钻等难题,完成了钻井施工任务。