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Model-based software-defined radio(SDR) design using FPGA

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4 Author(s)
Rodriguez, A.S. ; Dept. of Electr. & Comput. Eng., Bradley Univ., Peoria, IL, USA ; Mensinger, M.C. ; In Soo Ahn ; Yufeng Lu

A software-defined radio (SDR) allows for digital communication systems to easily adopt more sophisticated coding and modulation technologies, which is extremely important in meeting the ever-increasing demands of the wireless communication industry. In this study, an SDR has been constructed using Xilinx system generator tools and implemented on the Virtex-II Field Programmable Gate Array (FPGA). The Xilinx system generator allows for fixed-point logic system design, hardware/software co-simulation, and board implementation through a model-based approach. In the SDR, Quadrature Phase Shift Keying (QPSK) is chosen as the modulation scheme for demonstration. Through a wireless link, the QPSK signal experiences amplitude attenuation, frequency and phase shifts causing rotation of the signal constellation. A phase-locked loop (PLL) circuit is designed for carrier and symbol synchronization for recovery of data from the received signal. In order to resolve the phase ambiguity of the QPSK system, a differential encoding scheme is also implemented.

Published in:

Electro/Information Technology (EIT), 2011 IEEE International Conference on

Date of Conference:

15-17 May 2011