Research of energy characteristics of QAM modulation techniques for modern broadband radio systems

2016 ◽  
Author(s):  
Olexander Solomentsev ◽  
Maksym Zaliskyi ◽  
Roman Odarchenko ◽  
Sergiy Gnatyuk
Keyword(s):  
Energy Characteristics ◽  
Broadband Radio ◽  
Modulation Techniques ◽  
Qam Modulation ◽  
Radio Systems

scholarly journals Baseband Signal Generation for Multi-Function Phased Array Radar

2020 ◽  
Vol 9 (1) ◽  
pp. 416-419
Keyword(s):  
Traffic Control ◽  
Phased Array ◽  
Frequency Signal ◽  
High Data ◽  
Rf Transmitter ◽  
Phased Array Radar ◽  
Baseband Signal ◽  
Modulation Techniques ◽  
Qam Modulation ◽  
Quadrature Phase

The multi-function phased array radar (MPAR) is used for weather monitoring, air-traffic control requirements and non-cooperative elements monitoring in a parallel manner. The amplitude of the radio frequency signal is varied depending on the location of the target from the radar. The proposed work generates a signal which is used as a input for RF transmitter of Multifunction Phased Array Radar. To achieve this MPAR requirement, the in-phase and quadrature-phase samples are generated for a high data rate using MATLAB and then VHDL output was obtained from Xilinx for QPSK and QAM modulation techniques.

scholarly journals Efficiency and effectiveness video on demand over worldwide interoperability for microwave access

2019 ◽  
Vol 9 (3) ◽  
pp. 1919
Author(s):  
Muthanna Jaafar Abbas ◽  
Abeer Abd Al Hameed Mahmood
Keyword(s):  
Video On Demand ◽  
Mobility Patterns ◽  
Alternative Technologies ◽  
On Demand ◽  
Modulation Techniques ◽  
Qam Modulation ◽  
Efficiency And Effectiveness ◽  
Overall Performance ◽  
Wimax Network ◽  
Better Than

<p>(WiMAX) is another solution for readiness broadband networks inside the region, covered or not, by alternative technologies like (ADSL) or cable through this paper by deploying many mobility patterns such as static, random and path for Video on Demand (VoD) over (WiMAX) Network. The performance of varied (QPSK) and (QAM) modulation techniques, by applying the (OPNET) simulator version 17.5. This work is finished in terms of the transmitted traffic and received traffic. Simulation result indicates that once nodes are moving by (SVC) code schema in (WiMAX). The result is an effective and attainable overall performance of (QPSK) which is better than (QAM) modulation technique.</p>

Vision for Beyond 4G broadband radio systems

2011 ◽  
Author(s):  
Bernhard Raaf ◽  
Wolfgang Zirwas ◽  
Karl-Josef Friederichs ◽  
Esa Tiirola ◽  
Matti Laitila ◽  
...  
Keyword(s):  
Broadband Radio ◽  
Radio Systems

scholarly journals Plataforma educativa para desarrollo de sistemas de software radio mediante modulación QPSK en Octave y Arduino

2020 ◽  
pp. 22-31
Author(s):  
Eric Mario Silva-Cruz ◽  
Franco Gabriel Caballero-Julián ◽  
Miguel Ángel Pérez-Solano ◽  
Cristian Pérez-Ojeda
Keyword(s):  
Software Radio ◽  
Quadrature Modulation ◽  
Radio System ◽  
High Speeds ◽  
Front End ◽  
Modulation Techniques ◽  
Analog Approach ◽  
Radio Systems ◽  
Web Platform

Nowadays, the development of software radio based systems has allowed the transmission of data at high speeds and frequencies in the order of Gigahertz (Jovanovic, 2018). For this, the digital system is characterized by using digital modulation techniques in software through transmission symbols in the DigitalEnd stage, applying digital-analog (DAC) and analogdigital (ADC) converters to vary the sampling frequency and transmit the data in the Front End, (Chien, 2001). This work presents a digital educational platform to simulate the characteristics of a Software Radio system and not a web platform. The present investigation is focused on the characterization of signals modulated by Octave considering in the first instance the quadrature modulation QPSK, where the transmission of the modulated signal is carried out by means of the Arduino board in a digital port, with a digital-analog approach (DAC) using PWM modulation a RC filter and an amplifier circuit, which synthesize the signal considering the limitations of the Arduino board. The proposed design presents an electronic platform that will allow the understanding of software-based radio systems.

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