中文摘要：

在单频GYS快速定位中，相位双差法方程严重病态，为了能够正确快速固定模糊度，必须采用合理的数据处理方法得到偏差较小的模糊度浮点解和有效的模糊度固定算法。对ARCE算法从解算线性方程组的角度重新做了推导，并对其在顾及基线先验信息的条件下做了改进。实践证明改进后的ARCE算法能有效地提高固定模糊度的正确率且编程简单。

英文摘要：

For the more efficient use the ARCE, a method for fixing ambiguity has been improved. Firstly, the ARCE is rededuced based on the solving a set of linear equations, then the constraint of initial baseline is used for searching ambiguity. Experiments show that it is easier to make program using this formulae given out here and the improved ARCE can obviously increase the rate of correctly fixing ambiguity.