Generation and implementation of IRNSS Standard Positioning Signal

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Abstract

The two sorts of services given by the Indian Regional Navigational Satellite System (IRNSS) satellites are Standard Positioning Service (SPS) and Restricted Service (RS). Both services will be given at two frequencies of L5 (1164.5 MHz) and S (2472.5 MHz) band. The code sequences utilized as a part of SPS are Pseudo Ranging Noise (PRN) codes. They utilize gold codes for navigational data transmission in SPS downlink. PRN sequence code is the secondary code and the gold code is the primary code. The greater part of the global positioning system works on Code Division Multiple Access (CDMA), in which Pseudo Random Code (PRN) sequences are required for the systems. In this paper a study is made on the generation and properties of the PRN codes from the navigational system viewpoint. This paper additionally shows the design and implementation of PRN code on Spartan-II FPGA hardware. The generated SPS PRN code results are approved from hardware with the simulation results and examination of the properties of the PRN codes positively acquired. This paper likewise exhibits the execution analysis and simulation of Auto-Correlation Function (ACF) and Cross-Correlation Function (CCF) properties for PRN sequence. The simulations of SPS PRN codes were completed utilizing the Xilinx ISE test system and MATLAB apparatus. The simulated test outcomes are within the theoretical limits.

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Yashaswini, A. R., Siva Nagendra Reddy, P., & Kodanda Ramaiah, G. N. (2016). Generation and implementation of IRNSS Standard Positioning Signal. Engineering Science and Technology, an International Journal, 19(3), 1381–1389. https://doi.org/10.1016/j.jestch.2016.01.005

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