A Novel Method of GPS Real-Time Pseudo Range Measurement Based on FPGA

The synchronization detection plays an important role in pseudo range measurement. A new synchronization detection method was proposed that the real-time property of detection was improved by combining the string matching with parity check, and the reliability was raised by enhancing the condition of keeping synchronous state. Furthermore, a proposal for real-time pseudo range measurement was given that consisted of the proposed synchronization detection method and multi-channel parallel Coarse Acquisition (C/A) code tracking. The real-time pseudo range measurement was implemented based on Filed Programmable Gate Array (FPGA). The simulations results show that the proposed method of synchronization detection has the advantage of low mistaken detection rate and short delay. Finally the test results show that the Global Position System (GPS) receiver based on the novel proposal for real-time pseudo range measurement can position effectively and they indicate the novel proposal for improved real-time pseudo range measurement can provide precise and real-time pseudo range information for position.