Abstract
In the process of analog modulation, carrier leakage will be possible if the carrier of orthogonal modulator leak to its output, with additional carrier appear at carrier frequency. What is more, transmitter filters and power amplifier saturation may lead to spectral asymmetry. To further study the impact of these distortions on navigation signals performance, this paper begins to introduce the mechanism of carrier leakage and spectral asymmetry. Then based on a new Matlab platform and mathematical models, the impact of these distortions on signal performance is comprehensively demonstrated from different aspects from Signal-Noise-Ratio (SNR), acquisition and tracing, to ranging accuracy, etc. Results show that low degree of carrier leakage and spectral asymmetry will not significantly affect signal performance, but when it deteriorates to a certain degree, the performance of navigation signals would exponentially decline. Those results and data we have obtained from this paper can also be used as a valuable reference for signal-on-board-generation designers in the process of signal design and optimization.
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Acknowledgments
Special thanks to all those involved at Navigation and Communication Department of National Time Service Center, Chinese Academy of Sciences. And thanks to relevant researchers of Xi’an branch courts of Chinese Academy of Sciences. Thanks for their support and useful helping.
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© 2012 Springer-Verlag Berlin Heidelberg
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He, Cy., Guo, J., Lu, Xc., Wang, X., Liu, F. (2012). The Impact of Carrier Leakage and Spectral Asymmetry Distortions on the Performance of Navigation Signals. In: Sun, J., Liu, J., Yang, Y., Fan, S. (eds) China Satellite Navigation Conference (CSNC) 2012 Proceedings. Lecture Notes in Electrical Engineering, vol 161. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-29193-7_13
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DOI: https://doi.org/10.1007/978-3-642-29193-7_13
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Publisher Name: Springer, Berlin, Heidelberg
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Online ISBN: 978-3-642-29193-7
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