Characterization of Phase and Amplitude Quantization Effects in a Direct Digital Synthesis-based Waveform Generator for Future Software-Defined GPS Payloads

Pranav R. Patel, Sanjeev Gunawardena, Richard K. Martin

Peer Reviewed

Abstract:	This paper describes a software-defined GPS signal generator with a direct digital synthesis (DDS) architecture to examine the effects of quantization on a signal. We explore the power and cardinality of spurious frequency components due to phase and amplitude quantization on the generated signal. MATLAB® models are developed to match the hardware that is implemented in a field programmable gate array (FPGA) with a high speed digital-to-analog converter (DAC). Once the MATLAB model is validated against hardware, it is used to determine the optimal phase and amplitude resolution for given implementation.
Published in:	Proceedings of the 2018 International Technical Meeting of The Institute of Navigation January 29 - 1, 2018 Hyatt Regency Reston Reston, Virginia
Pages:	857 - 868
Cite this article:	Patel, Pranav R., Gunawardena, Sanjeev, Martin, Richard K., "Characterization of Phase and Amplitude Quantization Effects in a Direct Digital Synthesis-based Waveform Generator for Future Software-Defined GPS Payloads," Proceedings of the 2018 International Technical Meeting of The Institute of Navigation, Reston, Virginia, January 2018, pp. 857-868. https://doi.org/10.33012/2018.15559
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