Software Defined Navigation Signal Generator

M.F. Ryba

Abstract:	The author has developed a prototype navigation signal generator system on a software defined radio platform. The platform chosen is a component/framework architecture that provides a standardized object-oriented means for developing and managing RF signal processing functions. This platform’s ability to dynamically reallocate functions lends its use to numerous communications, signals intelligence, and information warfare missions. Signal processing steps can be allocated among numerous processors on a network; they can also be deployed in Field Programmable Gate Arrays (FPGAs). Both the software and FPGA frameworks provide standardized interfaces that support easy insertion of new COTS hardware, and ready adaptation of the payload to various host platforms. The Adaptive Joint C4ISR Node (AJCN) Advanced Concept Technology Demonstrator is a particular example of the overall system architecture at work. This paper describes the AJCN concept in military operations, and how GPS augmentation functions such as a military pseudolite have been implemented in this architecture. Pseudolites have been studied for numerous applications, and we describe how this system can be flexibly commanded to perform these various missions. The paper emphasizes how stringent signal timing and control requirements are maintained within the constraints of a software defined radio platform.
Published in:	Proceedings of the 19th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2006) September 26 - 29, 2006 Fort Worth Convention Center Fort Worth, TX
Pages:	176 - 181
Cite this article:	Ryba, M.F., "Software Defined Navigation Signal Generator," Proceedings of the 19th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2006), Fort Worth, TX, September 2006, pp. 176-181.
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