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MODULATOR DESIGN DEVELOPMENT TESTING


an electronic device whose input is a baseband signal which is used to modulate a radio frequency source

Broad-band HBT BPSK and IQ modulator MMICs and millimeter-wave vector signal characterization
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Abstract Reflection-type binary phase-shift keying and in-phase and quadrature modulator monolithic microwave integrated circuits (MMICs) are reported in this paper. These MMICs are fabricated by 1-m HBT process and evaluated successfully under vector signal

400-G single carrier 500-km transmission with an InP dual polarization IQ modulator
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we demonstrate experimentally 400G transmission over 500 km using an InP-based dual-polarization IQ modulator on a single wavelength. The results show that a 56 Gbaud PDM-16-QAM modulated signal can be transmitted over 500 km at a

770-Gb/s PDM-32QAM coherent transmission using InP dual polarization IQ modulator
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PDM-32QAM) transmission on a single wavelength using an Indium Phosphide (InP) dual polarization IQ modulator over 320 km of standard single mode fiber (SSMF), which is suitable for low cost metro networks and datacenter interconnects (DCI). Moreover with the

IQ Modulatorbased Phase Shifters Combined with Butler Matrix for Smart 2.4 GHz Antennas
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Abstract This paper is addressed to report our study of low cost smart 2.4 GHz antenna using IQ Modulatorbased phase shifters combined with Butler matrix for eliminating the RF switches. This 2.4 GHz smart antenna systems will be equipped at self deployment WLAN

LOW RF CONTROL FEEDBACK AND IQ VECTOR MODULATOR COMPENSATION FUNCTIONS.
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IQmodulator calibration procedure was developed to find proper compensation functions in the conversion algorithm to minimize phase-amplitude coupling and setting-reading errors: rms(Aset Aread )= 0.03dB, rms(set read) = 0.3 deg AbstractAn optical transmitter incorporating a monolithically integrated laser and a traveling wave electrode (TWE) in-phase and quadrature ( IQ ) modulator is presented. A co- designed SiGe differential driver was co-packaged for highest quality push-pull modulation. AbstractWe demonstrate high-speed modulations in dualpolarization (DP) quadrature phase shift keying and DP 16-and 32-quadrature amplitude modulation formats with radio frequency driving voltage as low as 2 Vppd using a packaged monolithic silicon DP in-

A NOVEL BROADBAND IQ MODULATOR /DEMODULATOR MMIC
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ABSTRACT Commercially available broadband microwave IQ Modulator /Demodulator modules typically cover an instantaneous bandwidth of up to 2-octaves, for example 1GHz to 4GHz. Such modules are usually based on passive printed structures with diodes for the

Low Power IQ Modulator for Digital Communications
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IQ modulators are versatile building blocks for RF systems. The most common application is generating RF signals for digital communication systems. This article illustrates the modulation accuracy of the LTC5599 low power IQ modulator and shows by simple

Digital Compensation Techniques for In-phase Quadrature ( IQ ) Modulator
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Abstract In In-phase/Quadrature ( IQ ) modulator generating Continuous-Phase-Frequency- Shift-Keying (CPFSK) signals, shortcomings in the implementation of the analogue reconstruction filters result in the loss of the constant envelope property of the output signal.

High Dynamic Range RF Transmitter Signal Chain Using Single External Frequency Reference for DAC Sample Clock and IQ Modulator LO Generation
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Circuits from the Lab circuits from Analog Devices have been designed and built by Analog Devices engineers. Standard engineering practices have been employed in the design and construction of each circuit, and their function and performance have been

45MHz TO 2700MHz IQ MODULATOR WITH SYNTHESIZER/VCO AND BASEBAND INTERFACE
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The fractional-N synthesizer takes advantage of an advanced sigma-delta architecture that delivers ultra-fine step sizes and low spurious products. The synthesizer/VCO combined with an external loop filter allows the user to generate an oscillator signal covering 90MHz to

Analysis of Common-Mode Parasitic Oscillation in a Wideband IQ Modulator with Multi-Stage Differential Amplifiers
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ABSTRACT The author reports that strong parasitic oscillation was observed in multi-stage differential amplifiers of IQ modulator IC fabricated with GaAs pHEMT technology at Agilent Technologies. This effect was detected through the internal power detectors and started

A NEW TECHNIQUE FOR DIGITAL PRE-COMPENSATION IN IQ MODULATOR
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Abstract In DSP based IQ modulators generating CPFSK signals, departures from a flat- magnitude, linear phase frequency response in the pass bands of analogue reconstruction filters in the I and Q channels cause ripples in the modulator output signal envelope. These

A simple digital VHDL QPSK modulator designed using CPLD/FPGAs for biomedical devices applications
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Phase shift Keying ( QPSK ) modulator applied for implantable telemetry applications as demonstrated. VHDL programming code is used to generate QPSK digital signal. The input test signals data and carrier are interfaced to the CPLD and FPGAs board from Agilent

LiNbO3 integrated optical QPSK modulator and coherent receiver
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Abstract: These devices, reported for the first time, are X-Cut highly integrated LiNbO3 Optical Modulator and Hybrid Receiver developed for coherent QPSK (Quadrature Phase Shift Keying) fiber optical communications, as well as other applications. Preliminary tests of

FPGA implementation of low power digital QPSK modulator using verilog HDL
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Abstract: Quadratute Phase Shift Keying (QPSK) is a modulation scheme commonly used in wireless communication system due to its ability to transmit twice the data rate for a given bandwidth. Even though the QPSK modulator consumes less power in a present devices but

FPGA Implementation of QPSK modulator by using Hardware Co-simulation
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Abstract:-The modulators are the basic requirement of communication systems they are designed to reduce the channel distortionto use in RF communication hence many type of carrier modulation techniques has been already proposed according to channel properties

FPGA Implementation of π/4- QPSK Modulator and Demodulator
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Abstract Here, we are presenting the FPGA based simulation of π/4- QPSK modulator and demodulator. π/4-QPSK is widely used modulation scheme in satellite radio applications. Complete modulator and demodulator units will be modeled using VHDL and their

QPSK modulator on FPGA using 64 values ROM
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AbstractIn many applications such as TDMA cellular telephone, OFDM, Bluetooth, Satellite communication etc. QPSK digital modulation technique is used due to its higher bandwidth efficiency, higher noise immunity and simpler circuit. Simpler circuit is having lower cost,

QPSK modulator and demodulator using FPGA for SDR
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ABSTRACT A software-defined radio (SDR) allows for digital communication systems to simply accept more complicated coding and modulation technologies, which is enormously vital in meeting the ever-increasing demands of the wireless communication industry. An

Simple QPSK modulator implemented in virtex 6 FPGA board for satellite ground station
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Abstract-Modulation is a key feature commonly used in wireless communication for data transmission and to minimize antenna design. QPSK (Quadrature Phase Shift Keying) is one type of digital modulation technique used to transfer the baseband data wirelessly in much

Software defined radio implementation of a QPSK modulator /demodulator in an extensive hardware platform based on FPGAs Xilinx ZYNQ
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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

A review on FPGA Implementation of Low Power QPSK Modulator by using Hardware Co-Simulation
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ABSTRACT This paper presents a study of different concepts of FPGA implementation of QPSK modulator based on simulation with Xilinx System Generator. The different way of designing QPSK Modulator are discussed in details along with its respective concerts such

Design of BPSK/ QPSK Modulator using Verilog HDL and Matlab
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ABSTRACT Quadrature Phase Shift Keying (QPSK) is a modulation scheme commonly used in wireless communication system and itbecause of its ability to transmit twice the data rate for a given bandwidth. In most cases, the QPSK modulator consumes less power and

A Verilog Design in FPGA Implementation Of Quadrature Phase Shift Keying (QPSK) Digital Modulator
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Technological schematic of QPSKModulator

Frequency Control QPSK Modulator Based on DDS Technology
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Abstract: Article Preview Article Preview This paper introduced a kind of frequency control QPSK modulator based on DDS technology, which is implemented based on FPGA. In this way, frequency control QPSK modulator is not only small size, low cost, system stability and

A NOVEL APPROACH TO THE DESIGN AND IMPLEMENTATION OF 3 dB LANGE COUPLER FOR MMIC Ka-BAND QPSK MODULATOR
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ABSTRACT We present the novel design of Lange Coupler over traditional design of Quadrature Branch Coupler. Lange Coupler can be widely used since it readily provides a broadband 90 phase split. In comparison, the branch line coupler has a narrow bandwidth

DESIGNING OF DS CDMA-CI TRANSMITTER THROUGH CORDIC AND QPSK MODULATOR
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Code Division Multiple Access-Carrier Interferometry Transmitter. The present existing transmitter model of DS-CDMA is not capable enough when spreading codes are made complex since complex multiplications needed for spreading would consume more power,

A Direct Injection-Locked QPSK Modulator Based on Ring VCO
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ABSTRACT: QPSK or Quadrature Phase-Shift Keying is a higher order modulation scheme used in digital modulation. A direct injection locked QPSK modulator uses VCO for minimize the area of the conventional modulator. In this project injection locking scheme is used since

FPGA Realization of Gaussian Pulse Shaped QPSK Modulator
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AbstractIn past few years, a major transition from analog to digital modulation techniques has occurred and it can be seen in all areas of satellite communications systems, cellular and wireless. Modulation is essential in transmitting as two or more signals are sent at a time

A Photonic QPSK Modulator Aiming Space Applications
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AbstractThis paper addresses the subject of the satellite payload signal transmission and the digital-microwave link. Usually, the carrier modulation data transmitter (DT) employs in- phase (I) and quadrature-phase (Q) processing to achieve phase shift keying (M-PSK).

High Data Rate QPSK Modulator with CCSDS Punctured FEC channel Coding for Geo-Imaging Satellite
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Abstract-The GISAT (Geo-Imaging Satellite) mission of ISRO (Indian Space Research Organization) is to pro-vide state-of-the-art high resolution imaging of earth from the Geo- stationary orbit. The large amount of this imaging data is to be sent in real time on earth.

Design and Implementation of Effective QPSK Modulator Based on FPGA
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Abstract: The objective of this project is to develop an implementable effective QPSK modulator that uses less power for operation. The design of QPSK modulator has be done using Matlab/Simulink and Xilinx System Generator. The modulator algorithm has been

QPSK Modulator : A Design Example for EET
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Abstract Quaternary Phase Shift Keying (QPSK) is a fundamental method of encoding digital data in the phase of an analog carrier. This technique was used by early modems using the public telephone network. While the technology is no longer economically valid, the

Low power QPSK backscatter modulator for UHF RFID passive tags
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than one bit in each symbol can be possible. In a QPSKmodulator which includes the quadrature oscillator and the multiplexer has been presentedThis circuit has high power dissipation in the range of milli Watt. In this paper a QPSKmodulator is designed, which

Simulation of Qpsk Modulator to Generate Real and Imaginary Channel
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Abstract In this paper we present a theoretical background of the digital communication systems and the QPSK modulation. The main purpose is to design the QPSK system on FPGA. The simulation of a QPSK Modulator to generate the real and imaginary channel is

A High Bit Rate Miniaturized QPSK Modulator for Satellite Data Transmission
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Indian Remote Sensing (IRS) satellites provide data in a variety of spatial, spectral and temporal resolutions. The data transmission requirement for IRS satellites has increased from 20Mbps to 640Mbps. There is a need to improve the resolution of images and hence

Hardware Simulation of QPSK Modulator
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One of a kind PSKs may be received through M-ary PSK, where M is the no. of states or no. of phase shifts that is depend upon the no. of indicators are blended for modulation. In QPSK signals are combined for modulation. BER of QPSK is higher than better order PSK signals consisting

DESIGN OF CONCURRENT DUAL BAND QPSK MODULATOR
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ABSTRACT This paper proposes a new architecture of QPSK Modulator that enables concurrent transmission of two separate frequency bands 2.4/5.2 GHz in microstrip technology. This is required in order to realize a separate aggregation system. To AbstractIn, Gao et al have experimentally demonstrated a scheme for filter-less photonic millimetre-wave (mm-wave) generation using a dual polarization quadrature phase shift keying modulator (DP-QPSK). For frequency octo-tupling generation, the X- QPSK

FPGA Implementation of QPSK Modulator Based on Matlab/Xilinx System Generator
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Abstract: This paper presents an efficient approach for the implementation of typical communication structures studied in class. This scheme is beneficial where the objective is to implement the physical working of complex DSP or communication structures or

QPSK MODULATOR FOR X-BAND IRS SATELLITES
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Abstract The current work is applied to remote sensing satellites. IRS satellites in the orbits are not only sending data to Indian ground stations but also to other international stations for passing data to different countries. Multiple solid-state cameras are carried by the IRS

Implementation of Pulse Shaping Filter for π/4-shift QPSK Modulator
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Abstract A pulse shaping lter for 7r/4-shift DQPSK modulator is implemented with less hardware complexity by utilizing the symmetry of premodulation digital lter and the feature of 7r/4-shift DQPSK modulation scheme, The proposed design gives signicant reduction of

Design and Implementation of Software-defined Radio (SDR) Based QPSK Modulator on FPGA
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AbstractSoftware defined radio (SDR) technology enables implementation of wireless devices that support multiple airinterfaces and modulation formats, which is very important if consider proliferation of wireless standards. To enable such functionality SDR is using

QPSK Modulator with Continuous Phase and Fast Response Based on Phase-Locked Loop
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Abstract. Among M-phase shift keying (M-PSK) schemes, quadrature phase-shift keying (QPSK) is used most often because of its efficient bandwidth consumption. However, in comparison with minimum-shift keying, which has continuous phase transitions, QPSK

DesignComparision of QPSKQAM Modulator Using Matlab
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The random bit generator generates a bit sequence (PN- sequence) that is used as input data for our QPSKmodulator III.CONCLUSION At this work a MATLAB simulation was carried out in order to analyze the QAMQPSKModulator

ELECTRONICS COMPONENTS SALES AND SERVICE-INTEGRATED CIRCUIT-ANALOG, DIGITAL, DSP, RF IC, WIRLESS IC, VLSI, CAPACITOR, RESISTOR, INDUCTOR, PCB, MODULE, SENSOR