Abstract
The proper management of resources available in FPGA’s is one of the main issues that designers must consider when implementing a high bandwidth communications system. For this reason, we report the hardware-efficient implementation, for mapping stages and pulse shaping, of broadband multi-level QAM signals, in Field-Programmable Gate Array (FPGA) devices. The process for designing the system is based on the large capacity of analog-digital (ADC) converters that exist today, in this case the ADC has a sampling rate of 5 GSPS, which allows the transmission of signals with bandwidths of about 2.5 GHz. The model implements in the same polyphase FIR structure multiplier-less the mapping schemes Q-PSK, 16-QAM, 64-QAM y 256-QAM together with the RRC filter. As a result, this implementation shows that the proposed architecture eliminates the use of dedicated multipliers which would be around 3150 if conventional methods were used. The Error Vector Module is used as a figure of merit in the selection of the RRC filter and the digital quantization levels. We achieved the target frequency for hardware operation at 312.5 MHz con un factor de interpolation de 16 and an EVM < 2%. Also, Hardware Description Language (HDL) models are validates in test benches with reference to the finite precision models of Simulink.
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References
Rishad, A., Shahriar, R., Razibul, I., Nabil, S.: On the error vector magnitude as a performance metric and comparative analysis. In: International Conference on Emerging Technologies, pp. 27–31 (2006)
Gentile, K.: The care and feeding of digital, pulse-shaping filters. RF Mixed Signal 25, 50–61 (2002)
Mehra, R., Devi, S.: FPGA implementation of high speed pulse shaping filter for SDR applications. In: Meghanathan, N., Boumerdassi, S., Chaki, N., Nagamalai, D. (eds.) ASUC/NeCoM/VLSI/WeST/WiMoN -2010. CCIS, vol. 90, pp. 214–222. Springer, Heidelberg (2010). https://doi.org/10.1007/978-3-642-14493-6_23
Matworks: “rcosdesign,” Matworks Documentation. https://www.mathworks.com/help/signal/ref/rcosdesign.html. Accessed 21 Oct 2019
Anderson, J.B.: Digital Transmission Engineering. IEEE Press Editorial Board, Piscataway (2005)
Zoltowski, M.: Equations for the raised cosine and square-root raised cosine shapes. Communication Systems Division (2013)
Dehner, G., Rudolf, R., Schafer, M., Strobl, C.: Analysis of the quantization error in digital multipliers with small wordlength. In: Processing Conference (EUSIPCO), pp. 848–1852 (2016)
Chan, D., Rabiner, L.: Analysis of quantization errors in the direct form for finite impulse response digital filters. IEEE Trans. Audio Electroacust. 4(AU-21), 354–366 (2016)
Denis, D., Cordeiro, R., Oliveira, R., Viera, J., Silva, J., Silva, T.: Fully Parallel architecture for designing frequency-agile and real-time reconfigurable FPGA-based RF digital transmitters. IEEE Trans. Microw. Theory Tech. 3(66), 1489–1499 (2008)
Milic, L.: Multirate Filtering for Digital Signal Processing Matlab Applications. IGI Global, New York (2009). Information Science Reference
Zhen-dog, Z., Bin, W., Yu-mei, Z.: Multipath pipelined polyphase structures for FIR interpolation and decimation in MIMO OFDM systems. ISRN Signal Process. 2011 (2011). 4 pages
Nguyen, B., Shwedyk, E.: A First Course in Digital Communications. Cambridge University Press, Cambridge (2009)
Klymyshyn, D., Haluzan, D.: FPGA implementation of multiplierless M-QAM modulator. Electron. Lett. 38(10), 461–462 (2002)
Dehner, G., Rabenstein, R., Schafer M., Strobl, C.: Analysis of the quantization error in digital multipliers with small wordlength. In: European Signal Processing Conference (EUSIPCO), pp. 1848–1852 (2016)
Marin-Roig, J., Angarita, F., Valls, J., Almenar, V.: Diseno de Moduladores Basados en Tablas para Software Radio (2014)
Vivado Design Suite User Guide: Using Constraints, Xilinx (2017)
Acknowledgments
The authors thank the Technical University of Ambato and the “Dirección de Investigación y Desarrollo” (DIDE) for their support in carrying out this research, in the execution of the project “Plataforma Móvil Omnidireccional KUKA dotada de Inteligencia Artificial utilizando estrategias de Machine Learning para Navegación Segura en Espacios no Controlados”, project code: PFISEI27.
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Castro, C., Gordón, C., Encalada, P., Cumbajín, M. (2020). Multiband Broadband Modulator Implementation on Field-Programmable Gate Array. In: Botto-Tobar, M., Zambrano Vizuete, M., Torres-Carrión, P., Montes León, S., Pizarro Vásquez, G., Durakovic, B. (eds) Applied Technologies. ICAT 2019. Communications in Computer and Information Science, vol 1195. Springer, Cham. https://doi.org/10.1007/978-3-030-42531-9_26
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DOI: https://doi.org/10.1007/978-3-030-42531-9_26
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