Sefrea - Software e Sistemas

Sefrea - Software e Sistemas SEFREA designs and maintains mission-critical Software. We help businesses thrive by optimizing and automating their internal processes and Web presence.

SEFREA supports businesses with Full Stack Software, Responsive Web, Database and Mobile Application Development, as well as Computer /Communication System design /integration, delivering high-quality, cost-effective integrated solutions to diverse industries. The broad portfolio of solutions provides companies with the latest technology to exceed customers and business needs. SEFREA aims for excellence, high-standards and complete customer satisfaction using the latest technology.

Votos de um Feliz Natal para todos! May your heart and home be filled with all of the joys the festive season brings. Me...
22/12/2017

Votos de um Feliz Natal para todos! May your heart and home be filled with all of the joys the festive season brings. Merry Christmas and a wonderful 2018!

SEFREA has re-crafted its website using the latest HTML5/CSS3 responsive techniques for an optimal viewing experience in...
21/07/2013

SEFREA has re-crafted its website using the latest HTML5/CSS3 responsive techniques for an optimal viewing experience in all devices (desktop computers, tablets and mobile phones). The website was rebuilt from scratch and now supports a fluid layout, media queries, flexible images, as well as beautiful native CSS3 transitions. Feel free to check it out using your iPhone/iPad or Android device: http://www.sefrea.com/

15/05/2013

4-finger CDMA RAKE Receiver (http://www.sefrea.com/en/portfolio/4-finger-cdma-rake-receiver/)

MATLAB/SIMULINK 4-finger RAKE receiver design; this type of receiver is commonly used in CDMA systems and allows for transmitted signal replica combination, yielding an improved signal estimate at the receiver output.

The project goal was to design, implement and test a 1.7 GHz low-noise amplifier (LNA) intended to be the first stage of...
15/05/2013

The project goal was to design, implement and test a 1.7 GHz low-noise amplifier (LNA) intended to be the first stage of a Meteosat System downconverter; The LNA, together with the following stages (such as the baseband filter, the mixer and the local oscillator), would allow the reception of meteorological images from the Meteosat System; Once implemented on a PCB using microstrip technology, the individual components and the overall LNA system were tested using microwave measurement techniques; more specifically, S-parameter measurements were made using a vector network analyser; The design process was assisted by the use of EM simulation software, such as Ansoft Serenade.

http://www.sefrea.com/en/portfolio/meteorological-satellite-earth-station/

15/05/2013

MIMO for 4G Wireless Communications (http://www.sefrea.com/en/portfolio/mimo-for-4g-wireless-communications/)

Derivation of the maximum spectral efficiency of multiple-input multiple-output (MIMO) systems in mobile wireless communication environments; Study, design and validation of advanced transmission and reception techniques in doubly dispersive MIMO LTV systems

Design, implementation (in Java / C) and testbed validation of a passive monitoring system for distributed access networ...
15/05/2013

Design, implementation (in Java / C) and testbed validation of a passive monitoring system for distributed access networks; key results/achievements: real-time identification and tracking of Mobile IPv6 traffic flows; collection of monitoring data based on Cisco IOS NetFlow v9 interface; two-way communication for behavioral control of filtering/sampling of traffic; implementation of a front-end (JFC/Swing) for real-time interactive network monitoring; real-time plotting of the network topology, node mobility detection, display of flow path information and traffic statistics; plotting of high-precision start/finish curves, including high performance 'zooming' techniques for the computation of instantaneous data rates, delays between nodes, retransmissions and packet loss; mobility analysis with real-time metrics.

http://www.sefrea.com/en/portfolio/mobile-ipv6-state-of-the-art-monitoring-system/

client: Daphne Pty. Ltd., Australia (link: http://www.sefrea.com/en/portfolio/customer-relationship-management-crm-syste...
15/05/2013

client: Daphne Pty. Ltd., Australia (link: http://www.sefrea.com/en/portfolio/customer-relationship-management-crm-system/)

Design, implementation and testing of a Web-based Customer Relationship Management (CRM) System; works: Database Design; Microsoft SQL Server setup; 3-tier Management System Development; Web Design/Integration; MYOB Import/Export synchronization; Business Intelligence Reporting; Deployment to SBS 2003/2011 (IIS6/7);

client: Streetdata Pty Ltd., Australia (http://www.sefrea.com/en/portfolio/outlook-mobile-service-oms-system/)Design, im...
15/05/2013

client: Streetdata Pty Ltd., Australia (http://www.sefrea.com/en/portfolio/outlook-mobile-service-oms-system/)

Design, implementation and testing of the Outlook® Mobile Service (OMS) System, namely: OMS SOAP Server (full PHP language implementation), Interface to Streetdata’s HTTPS API, Database for data storage, Web interface for message-level troubleshooting. The system uses sophisticated technologies such as: Web Services, PHP /HTML, MySQL Database, SOAP Client /Server, XML /WSDL, HTTP /HTTPS,Apache HTTP Server, Trusted SSL/TLS (RSA) Certificates/Keys, OMS Technology /Specification

15/05/2013

Consulting | Network Design, Implementation and Management (http://www.sefrea.com/en/services/network-design-implementation-and-management/):

Hardware- and service-level management;
Routing, Switching, Security and Firewalling components;
Windows or Linux environments;
Nagios and Prelude-IDS management platforms.

Hardware- and service-level management, Routing, Switching, Security and Firewalling components, Windows or Linux environments, Nagios and Prelude-IDS management platforms

Endereço

Freamunde
4590-382

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