It is urgent to research and develop new reconnaissance receiver with the properties of wide band , high sensibility , wide dynamic range and accuracy signal parameter estimation 为了侦察超宽带雷达信号,迫切需要研制带宽大、灵敏度高、动态范围大、参数估计精度高的雷达侦察接收机。
This new measurement can decline the number of probe packets at the basic of insuring the accuracy . secondly , based on the two - leaf tree mode , we proposed the three - leaf tree mode 三叉树模型中,由于增加方程数目提高了解的精度,因而也可以发送相对较少数目的探测包而得到一定估计精度的解。
Dft method can be fast implemented on dsp platform by the use of fft algorithm , while the method of cyclic correlation has better noise immunity performance and high estimation accuracy 离散傅立叶变换方法能够在dsp平台上通过fft快速实现，而循环相关方法则具有很高的频率估计精度和很好的抗噪性能。
As the measure noise has much effect on estimate precision and convergence speed , when noise increases abruptly , the position estimation converges slowly and the precision becomes poor 由于观测噪声对估计精度和算法收敛速度有较大影响,当观测噪声突然增大时, ukf方法在位置估计时收敛变慢,而且精度变差。
Simulation shows that ukf algorithm can estimate missile trajectory with satisfying precision and convergence speed , the method ’ s availability and feasibility for missile estimation is validated 仿真结果表明ukf滤波能够得到较为满意的估计精度和收敛速度,验证了该方法的有效性和对弹道估计问题的可行性。
A method , called r / s analysis , is employed to improve the estimate accuracy of the hurst exponent . the simulation results show the method mentioned above is also an efficient filter 针对hurst指数的估计误差较大的问题，本文引入r s分析法，仿真研究表明该方法在提高hurst指数估计精度的同时提高了wls法的滤波效果。
How the proficiency of estimation is affected is analyzed . how to choose optimal number of observations and how to determine the order of model are also studied and practical method is presented for each 讨论分析了影响估计精度的因素，也对最佳的数据数量和模型阶数的确定方法进行了研究，分别提出了一种行之有效的方法。
In order to improve the precision of the direction of arrival estimation , the direct average and weighted average are used to process the multiply linear spectrum in analyzing multiply linear spectrum method 其中，在分析多线谱法方位估计时，采用了直接平均和加权平均两种处理方法对多线谱进行处理，旨在提高目标方位估计精度。
This method detected the rotor position from almost zero speed to high speed , made reliable and precise commutation , simplified the hardware circuit and enhanced the estimation precision of rotor position 该方法能在转子转速接近为零到高速时较好地确定转子的位置，可靠准确地换相，从而简化了硬件电路，提高了转子的位置估计精度。
The simulated estimation indicated that this observer not only have high estimated precise in kinds of maneuvering fly , but also have good robustness to atmosphere turbulence or the change of flight stat 经过理论分析和仿真验证，这种观测器不仅在各种机动飞行下具有很好的估计精度，而且具有很好的抗大气紊流干扰及飞行状态变化的鲁棒性。
