Model Based Design And Implementation Of Coarse Acquisition (C/A) Code Of Irnss Signal On Fpga

Abstract

 IRNSS is an independent regional navigation satellite system being developed by India. It is designed to provide accurate position information service to users in India as well as the regions extending up to 1,500 km from primary service area boundary. An Extended Service Area lies between primary service area & area by rectangle from Latitude 30 degree south to 50 degree north, Longitude 30 degree east to 130 degree east. This paper is focused on developing a software-based Coarse Acquisition for IRNSS satellites. The main reason for choosing Gold code to generate C/A code is the good auto-correlation and cross-correlation it exhibits. Tracking & positioning of IRNSS device is preceded by acquisition stage which uses C/A Code generator. This paper present the C/A code generation for IRNSS Signals constructed on Matlab Simulink, thereafter Model is converted to HDL Verilog code (Xilinx ISE) and implemented on FPGA.