三频载波相位伪距平滑算法分析与比较

Analysis and Comparison on algorithms of carrier phase smoothing pseudorange in three-frequency GNSS

针对现代化卫星导航系统的三频新特点,本文推导了利用多频载波相位平滑单频伪距及组合伪距的一般算法,提出通用的计算方程和解析表达式,比对了三频GNSS系统中的3种平滑算法,并进行实测数据验证和分析。理论分析表明三频二阶伪距平滑算法噪声方差性能最差,三频一阶伪距平滑算法噪声方差性能与双频伪距平滑算法相当。

According to the new property of three-frequency in modem GNSS, general algorithm of smoothing single pseudorange and combined pseudorange using multi-frequency carriers phase was provided, general equations and analytical expression was presented, and three smooth algorithms were compared. It was illuminated by theoretic analyzing that three carriers-second order has the worst standard variance of residual error and three carriers-first order has almost equal standard variance of residual error with dual carriers-first or- der.