In multi-sensor information fusion,the studied track fusion algorithm is based on the optimal Kalman filter with noise covariance. But noise variance is scarce knowledge in practice.

• 在多传感器信息融合中；已有的航迹融合算法都是在噪声方差已知情况下基于最优的卡尔曼滤波算法的；而实际应用中噪声方差往往是未知的.