噪声密度 meaning in English

noise density

Present a modified particle filter ( pf ) algorithm based on the los / nlos binary state information of propagation environment using the numerical method of the probability density function ( pdf ) about the hybrid noise . the key idea is using numerical method to calculate the hybrid noise pdf , and integrating binary environment information to get filtering result
2 .给出了应用粒子滤波器改进直达波与非直达波混合环境中移动终端跟踪性能的新算法,特色是利用数值方法计算混合噪声密度函数,结合二元环境信息完成滤波估计。