舰船电子工程
艦船電子工程
함선전자공정
Ship Electronic Engineering
2015年
10期
151-155
,共5页
水下体目标%频率估计%Rife算法%分段相位差算法
水下體目標%頻率估計%Rife算法%分段相位差算法
수하체목표%빈솔고계%Rife산법%분단상위차산법
underwater target%frequency estimation%Rife algorithm%segmented phase difference algorithm
针对鱼雷声引信工作区域内目标回波的体目标效应对回波信号的多普勒频率估计精度的影响,提出了一种幅度比值‐分段相位差联合频率估计方法(简称 RP 方法)。该方法将传统的 Rife 算法和分段相位差算法相结合,通过对所估计的信号频率进行预处理,在不同的频段采用不同的估计算法,使算法的整体性能显著提高,充分保留了两种算法的优点,同时又克服了各自的缺陷,实现了对目标回波信号多普勒频率的高精度估计。仿真结果表明,该方法估计精度高且稳定性较好,能够较好地满足鱼雷在声引信工作区域内提取目标回波多普勒频率信息,实现精确炸点预测,具有一定的工程应用价值。
針對魚雷聲引信工作區域內目標迴波的體目標效應對迴波信號的多普勒頻率估計精度的影響,提齣瞭一種幅度比值‐分段相位差聯閤頻率估計方法(簡稱 RP 方法)。該方法將傳統的 Rife 算法和分段相位差算法相結閤,通過對所估計的信號頻率進行預處理,在不同的頻段採用不同的估計算法,使算法的整體性能顯著提高,充分保留瞭兩種算法的優點,同時又剋服瞭各自的缺陷,實現瞭對目標迴波信號多普勒頻率的高精度估計。倣真結果錶明,該方法估計精度高且穩定性較好,能夠較好地滿足魚雷在聲引信工作區域內提取目標迴波多普勒頻率信息,實現精確炸點預測,具有一定的工程應用價值。
침대어뢰성인신공작구역내목표회파적체목표효응대회파신호적다보륵빈솔고계정도적영향,제출료일충폭도비치‐분단상위차연합빈솔고계방법(간칭 RP 방법)。해방법장전통적 Rife 산법화분단상위차산법상결합,통과대소고계적신호빈솔진행예처리,재불동적빈단채용불동적고계산법,사산법적정체성능현저제고,충분보류료량충산법적우점,동시우극복료각자적결함,실현료대목표회파신호다보륵빈솔적고정도고계。방진결과표명,해방법고계정도고차은정성교호,능구교호지만족어뢰재성인신공작구역내제취목표회파다보륵빈솔신식,실현정학작점예측,구유일정적공정응용개치。
Aiming at that body target effect of target echo has an impact on the estimated Doppler frequency precision of echo signal in work area of torpedo acoustic‐fuze ,the Rife‐Segmented Phase Difference Method is proposed .The high esti‐mation precision of echo signal's Doppler frequency is achieved by the method through combining the traditional Rife algo‐rithm and the Segmented Phase Difference algorithm .It significantly improves the overall performance of the algorithm ,fully retains the advantages of the two algorithms and overcomes the respective defects by the estimated signal frequency is prepro‐cessed and different estimation algorithms are used in different frequency .Simulation result shows it can well extract Doppler frequency information of target echo in work area of the torpedo acoustic‐fuze to achieve precise prediction of burst spot with high estimation precision and good stability ,which has certain engineering application value .