Abstract: The small area GPS accurate communication problems.When GPS signal through the ionosphere,will be affected by a large number of electric ion in the ionosphere,the influence of cause multiplicative noise.In the city center contour strength multipath effect condition,GPS signal may be affected by multiplicative noise interference caused attenuation.The traditional GPS communication method in by the multiplicative noise interference caused by the GPS communication signal attenuation,sharply reduced communication robustness.Proposed based on markov small area GPS communication optimization algorithm.GPS signal to collect particle filter processing,get GPS signal transfer in the process of degradation degree,and carries on the compensation.According to markov correlation theory,the establishment of GPS communication model,so as to realize the small area GPS enhance communication.The experimental results show that this algorithm can effectively improve the multiplicative noise signal interference small area under the accuracy of GPS communication.