Software Defined Radio Implementation of a QPSK Modulator/Demodulator in an Extensive Hardware Platform Based on FPGAs Xilinx ZYNQ

Abstract

Software Defined Radio (SDR) technology enables wireless devices deployment with support to multiple interfaces in modulation formats and it has gained importance due to the current wireless standards proliferation. In order to activate these functionalities it is necessary to apply SDR inside a reconfigurable hardware such as the Field Programmable Gate Array (FPGA). In this study, design procedures developments are presented resulting in a Quadrature Phase Shift Keying (QPSK) modulator/demodulator based on a hardware architecture of the Xilinx FPGA Zynq family. Also in the modem's conception it was employed the Xilinx Vivado-tool combined with Matlab, Simulink and development with ISE/EDK apparatuses. As for the reconfigurable hardware platform applied to this, it was utilized the ZedBoard along with the Analog Devices FMCCOMMS1 radio module. In addition, it is noteworthy to indicate that the entire software-hardware solution was initially carried out through a simulation that achieved the system scheme, including the hardware platform, before any hard implementation of the QPSK modem itself. The central goal in this investigation is to fully demonstrate how to construct a feasible radio system through software as close to the state of the art as possible.

Software Defined Antenna Testing

“…The QPSK modulator converts the input bit stream into a digital signal which can be transmitted over the communication channel. The modulated symbols are up sampled by four and fed through a Raised Cosine Transmit Filter with a roll off factor 0.5 [32], as shown in Fig.9. Fig.9.…”

“…The receiver section consists of Automatic Gain Control (AGC), coarse frequency compensation, fine frequency compensation and time recovery [32]. The Fig.10 shows the functional block diagram of the QPSK receiver.…”

Design and simulation of optimized QPSK transmitter using HDL code in MATALB

“…These comparative steps of software are equivalent to inherent massive parallelism of FPGA which allow implementing the abstraction design by so called co-simulation adoptions [19,20]. The SIMULINK block set in MATLAB programs is an environments used for different area to design a active and entrenched systems [21,22]. The system generator represent high level tool could be used to facilitate the FPGA kits design [23,24].…”

Rádios Definidos por Software com aplicações GNU Radio

“…Os Rádios Definidos por Software (Software Defined Radio -SDR), são um conjunto de tecnologias implementadas em hardware e software (1), dentre estas tecnologias as aplicações em software de um Rádio Definido por Software são implementadas de maneira parcial ou total de forma reconfigurável (10) (23). Esta funcionalidade se aplica em circuitos integrados com capacidade de programação como o Field Programmable Gate Array (FPGA) e Advanced Reduced Instruction set Computer (RISC) Machine (ARM).…”

“…Esta funcionalidade se aplica em circuitos integrados com capacidade de programação como o Field Programmable Gate Array (FPGA) e Advanced Reduced Instruction set Computer (RISC) Machine (ARM). Existem outras linhas de pesquisa sobre o critério que se aplica para definir um SDR, neste aspecto pode ser citado (2) que um SDR é um sistema de comunicação de rádio em que os componentes que eram implementados em hardware como filtros digitais, moduladores, demodulares estes passam a ser implementados em software utilizando computadores pessoais ou sistemas embarcados (23).…”