QPSK Modulator on FPGA

Author

Popescu, S.O. ; Gontean, A.S. ; Ianchis, D.

Author_Institution

Appl. Electron. Dept., Politeh. Univ. of Timisoara, Timisoara, Romania

fYear

2011

fDate

8-10 Sept. 2011

Firstpage

359

Lastpage

364

Abstract

The paper presents the theoretical backgrounds of a QPSK Modulation. The QPSK Modulator is then simulated using Matlab/ Simulink environment and System Generator, a tool from Xilinx used for FPGA design as well as implemented on a Spartan 3E Starter Kit board. The modulator algorithm has been implemented on FPGA using the VHDL language on Xilinx ISE 12.3. The local clock oscillator of the board is 50 Mhz which corresponds with a period of 20 ns. The frequency of the QPSK carrier is 31,250 kHz and because the QPSK symbol is made of two bits, the output frequency is 62,50kbps. The modulator has been designed and simulated and its performances were evaluated by measurements.

Keywords

clocks; field programmable gate arrays; hardware description languages; logic design; modulators; oscillators; quadrature phase shift keying; FPGA design; Matlab-Simulink environment; QPSK modulation; QPSK modulator; Spartan 3E Starter as Kit board; VHDL language; Xilinx ISE 12.3; Xilinx tool; bit rate 6250 kbit/s; frequency 31250 kHz; frequency 50 MHz; local clock oscillator; quadrature phase shift keying; system generator; Field programmable gate arrays; Frequency modulation; Generators; Intelligent systems; Oscilloscopes; Phase shift keying;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Systems and Informatics (SISY), 2011 IEEE 9th International Symposium on

Conference_Location

Subotica

Print_ISBN

978-1-4577-1975-2

Type

conf

DOI

10.1109/SISY.2011.6034353

Filename

6034353