Abstract

RODRIGUEZ SUAREZ, Juan R; CORVEA ARMENTEROS, Carlos  and  TORRES GOMEZ, Jorge. Implementation of a costas loop IP module to demodulate BPSK signals in Xilinx FPGA Circuits. Rev. cienc. tecnol. [online]. 2014, n.22, pp.45-52. ISSN 1851-7587.

This paper is about the design and implementation of a Costas Loop IP Module to demodulate BPSK. It was designed using theMatlab Simulink XSG Library.The starting point was the design of a Simulink model of the Costas Loop Circuit to adjust the parameters needed to demodulate a BPSK signal. This model is transformed to an equivalent but it was built only with blocks of Xilinx XSG library in order to generate the IP module to be used with a MicroBlaze embedded microprocessor. A three stages procedure is presented to demodulate a BPSK signal: a pre-processing of the BPSK signal, the Costas Loop application to obtain the in- phase signal and the post-processing of this signal to recover the bit sequence. Results with simulated and real signals are analyzed.

Keywords : Lazo de Costas; BPSK de-modulation; IP Module; FPGA; MicroBlaze.

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