Digital GPS Signal Generator for L1 Band

Abstract

This paper deals with the generation of GPS signals using FPGA based Xilinx System Generator 9.2. We have considered L1 frequency band as it is mainly used for commercial, civil aviation and other purposes. Once the GPS signals are generated in the simulated laboratory environment we can test the proper working of multichannel GPS receiver which is an extension of this project. After we obtain accurate laboratory results, we can go for real GPS signals. The board that has been used for the hardware implementation is Lyrtech SFF-SDR board, which is having three functional layers. The bottom layer is the digital signal-processing layer, middle layer is the ADAC MASTER III layer and the upper layer is RF layer having a transmission and receiving capacity of 1 GHz. This will lead to the development of indigenous digital GPS signal generator using reconfiguration.