Abstract: An optimized GPS detection algorithm is proposed in this paper which can increase the detection speed tremendously. Based on this algorithm, this paper proposes a novel structure of the detection correlator by using HDL. Pipeline technique is introduced in this correlator which can help to reduce the circuit scale and enhance the data throughput on the same parallelism. In this paper, the function and timing simulation have been done on modelsim. The simulation results indicate that function of the correlator is correct and satisfies timing requirement.