Modem GMSK completamente digital com demodulação não-coerente

Programmable Single Board Spread Spectrum Digital Modem

Space Engineering SpA has recently developed a multi-processor, multi-FPGA (Field Programmable Gate Array), compact platform, including a multiple analog interface based on high-speed and high-accuracy ADC (Analog to Digital Converter) and DAC (Digital to Analog Converter). The platform with related software is intended to be a potentially powerful development system for the implementation of s...

Modelagem de Requisitos Organizacionais, Não-Funcionais e Funcionais em Software Legado com Ênfase na Técnica i*

RESUMO: Diversos sistemas computacionais desenvolvidos utilizando metodologias tradicionais como análise estruturada e essencial encontram-se em processo de evolução devido à necessidade de atender novos requisitos, do uso de novas tecnologias, de mudanças na metodologia de desenvolvimento, entre outras motivações. Neste processo, pouca ou nenhuma atenção tem-se dado ao aproveitamento de inform...

Based on DSP Builder of 2PSK Digital Modem Design

Through analysis on principles of Binary Phase Shift Keying(2PSK) modulation and demodulation, the design scheme based on DSP Builder of DDS (Direct Digital frquency Synthesizer) is put forward. By using DSP Builder complete modulation and demodulation model, carrier signal was generated by DDS signal source. The circuit hardware structure of this design is simple and easy to implement. The mod...

GMSK in a nutshell

This report presents a brief overview of the GMSK modulation scheme. 1 What is GMSK ? GMSK stands for Gaussian Minimum Shift Keying. This is a modulation scheme in which the phase of the carrier is instantaneously varied by the \modulating" signal (i.e. the information to transmit). GMSK diiers from MSK (Minimum Shift Keying) in that a Gaussian Filter of an appropriate bandwidth (deened by the ...

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