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DEMODULATOR DESIGN DEVELOPMENT TESTING


a circuit that is used in amplitude modulation and frequency modulation receivers in order to separate the information that was modulated onto the carrier from the carrier itself.

A symmetric 3 3 coupler based demodulator for fiber optic interferometric sensors
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ABSTRACT A method for demodulation of fiber optic interferometric sensors that utilizes a 3 x 3 coupler is described. The passive demodulation scheme does not require carrier (phase) modulation. The demodulation scheme relies on the three outputs of a 3 x 3 coupler and

Digital demodulator synchronization
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III ABSTRACT This study deals with carrier and symbol synchronization for narrowband (excess bandwith not exceeding 100%) uncoded BPSK, QPSK and OQPSK signals in a satellite communication environment. The emphasis is on synchronizer algorithms suitable for digital

Time-domain correlation image sensor: First CMOS realization of demodulator pixels array
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In CCD/AIS Workshop97, Bruges, we have proposed the basic concept of time-domain correlation image sensor which enables us to detect high frequency modulated light without increasing the scanning rate of image sensor. We also emphasized the importance

Modulation identification algorithm for adaptive demodulator in software defined radios using wavelet transform
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AbstractA generalized Digital Modulation Identification algorithm for adaptive demodulator has been developed and presented in this paper. The algorithm developed is verified using wavelet Transform and histogram computation to identify QPSK and QAM with GMSK and M

Implementation of FM demodulator algorithms on a high performance digital signal processor
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Abstract Analog modulations are more and more replaced by digital ones. To keep the compatibility the new device should be able to perform the analog modulation. A interesting solution is to solve this with digital signal processing. In an earlier semester project, four FM Abstract This paper describes the design of a Σ bandpass demodulator for a Z-axis MEMS vibrational gyroscope. In this MEMS device, a silicon mass is driven through electrostatic actuator so that it has a sinusoidal linear motion, with a controlled speed.

Time-of-flight Optical Ranging Sensor Based on a Current Assisted Photonic Demodulator
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The presented optical ranging sensor utilizes a current assisted photonic demodulator (CAPD) in combination with an integrating circuit to measure time-of-flight. The distance information is obtained by correlating received modulated light with the sentout signal.

Development of algorithm for demodulator for processing satellite data communication
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Summary Quadrature Phase Shift Keying (QPSK) is the preferred modulation scheme for satellite data communication. A two stage estimation scheme for the demodulator for processing satellite data is proposed in this paper, where carrier frequency estimation is

A novel PPM demodulator for wireless optical transmission systems
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Abstract Digital pulse position modulation (PPM) is a highly power efficient modulation scheme for use in wireless optical transmission systems. In this scheme, time is divided into frames, while each frame contains one pulse that is located at one of L possible slot

Digital demodulator synchronization
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III ABSTRACT This study deals with carrier and symbol synchronization for narrowband (excess bandwith not exceeding 100%) uncoded BPSK, QPSK and OQPSK signals in a satellite communication environment. The emphasis is on synchronizer algorithms suitable for digital

Development of algorithm, architecture and FPGA implementation of demodulator for processing satellite data communication
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Summary This paper proposes a novel VLSI architecture for the demodulator for processing satellite data communication. The overall receiver algorithm is divided into two parts: one to be implemented on an FPGA and the other on a DSP processor. A new distributed arithmetic

Design and FPGA implementation of an adaptive demodulator
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Abstract Signal Processing systems for communications will have to operate in rapidly changing environments. To suitably adapt to the varying requirements, control strategies targeted at selecting and tuning the signal processing algorithms need to be developed. The

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

MF-TDMA burst demodulator design with pilot symbol assisted frequency estimation
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An increasing number of MF-TDMA multimedia access systems based on the DVB-RCS standard is being deployed or planned for the near future. The satellite terminals installed at the user location are in general power limited, and should have a small antenna aperture.

Optically Controlled Silicon MESFET Fabrication and Characterizations for Optical Modulator/ Demodulator
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(OPFET) was fabricated by diffusion process to enhance the quantum efficiency, which is the most important optoelectronic device performance usually affected by ion implantation process due to large number of process induced defects. The desired impurity distribution

A binary phase shift keying demodulator using pulse detection
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Abstract-In this paper, a novel binary phase shiftkeying demodulator is proposed and demonstrated experimentally. The circuit operates by differentiating the modulated signal twice in order to generate sharp pulses at every ISOW phase transition. After the

A Re-Examination of Subcarrier Demodulator Performance
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The Subcarrier Demodulator Assembly(SDA) is re-examined, and a mathematical model is developed wherein an attempt is made to remove some o [the restrictions placed on previous models. The resulting model is found to differ from the previous model at low

Bit constraint parameter decision method for CDMA digital demodulator
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Abstract-Bit constraint parameters of the digital demodulator for the code division multiple access (CDMA) system are modeled. We examined the bit constraint effect by measuring output signalto-noise ratio (SNR). A performance-oriented method for optimizing the number

Adaptive-filter-based Bragg grating demodulator
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The following information will be presented at the 16th International Conference on Optical Fiber

Diversity-lock phase demodulator
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A synchronous demodulator utilizing the unique principle of diversity-lock has been developed for tracking and de- modulating orthogonally polarized signals transmitted from satellites. For the first time, the well known principles of pre-detection diversity combining are applied to the

A digital multicarrier demodulator with fast synchronisation for mobile SCPC satellite communications
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Abstract The demodulator part of an on-board multicarrier demodulator for the return up-link of a mobile satellite communication system, operating in SCPC mode, is described. Two transmission modes are con-sidered: continuous mode for voice and data transmission and

A PPM Modulator and Demodulator for the 2.5-Bit/Detected Photon Demonstration
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The use of quantized pulse position modulation over the photon channel has been much discussed (Refs. 1, 2) but little practiced. This article gives a functional description of a hardware PPM modulator and demodulator /analyzer which has been built for use in a 2.5-

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

Hardware implementation of OFDM modulator and demodulator using TMS320C6711 DSK board
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Abstract:-This contribution deals with an OFDM modulator and demodulator implementation in a DSK board. A brief description of the DSK board and Code Composer Studio is presented with the source codes in C language as well. The program of coder and decoder

Base Station Receiver Design Using a Direct-Conversion I/Q Demodulator
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Direct conversion (or low IF) receiver designs have been in existence for many years. They are widely used in cell phones and cordless telephones because of their simplicity and lower cost. Direct conversion receiver ICs have only recently met the level of performance

Frequency Offset Correction in a Software Defined Hiperlan/2 Demodulator using Preamble Section A
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In our Software Defined Radio project we perform a feasibility study of a software defined radio for two communication standards: HiperLAN/2 and Bluetooth. In this paper the Matlab/Simulink implementation of the HiperLAN/2 demodulator for the demonstrator of the

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

Demodulator and accumulator for the high-speed data acquisition system
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The High-Speed Data Acquisition System (HSDAS) is currently being implemented principally to support the DSN Planetary Radar Program (Ref. I). In the HSDAS, the Polynomial-Driven PN Generators (Ref. 2) will be used to bounce a coded waveform off the

Design and implementation of BPSK modulator and demodulator using VHDL
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Abstract: This paper give the brief description of digital communication system. Digital communication is more reliable, secure and efficient than that of analog communication. In Digital communication, BPSK is most important and efficient technique in terms of signal

Development of digital demodulator for laser vibrometer standard
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Abstract: In this study, a measurement reliability of commercial laser vibrometer with analogue demodulator is investigated for establishment of traceability system for laser vibrometer in vibration acceleration standard. As a result, a large amount of measurement

Implementation of OFDM demodulator using software environment System Generator for DSP
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AbstractThis paper deals with software implementation of OFDM demodulator using a software tool System Generator for DSP from Xilinx.System Generator for DSPis in conjunction on environment MATLAB-Simulink capable of simulating the proposed

BER and Simulation of OFDM Modulator and Demodulator for Wireless Broadband Applications
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ABSTRACT: With the rapid growth of digital wireless communication in recent years, the need for high speed mobile data transmission has increased. New modulation techniques are being implemented to keep up with the desired more communication capacity.

Performance of a Decision Feedback Demodulator In A Time-Dispersive Channel For ISI Cancellation And Its Implementation In Switched-Capacitor Technique
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Abstract: In this paper the performance of a Decision Feedback Demodulator (DFD) working in a time dispersive Channel and its ability to combat intersymbol interference (ISI) is analyzed. The dispersive channel is modeled as an exponential decaying function with time

Enhanced demodulator implementation for mobile satellite internet systems
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AbstractIn this paper, we implement the robust demodulator for mobile broadband satellite internet access systems. Especially, in order to achieve the good synchronization under very low SNR, a large frequency offset, and Doppler frequency offset with constraints of mobile

Wideband Demodulator Based on Five-Port Correlator for Channel Sounding Applications
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ABSTRACT We present in this paper a wideband RF demodulator using a five-port correlator and a power detector for channel sounding applications. The demodulator has been fabricated using microstrip components. The correlator receives from the five-port

Stability analysis of the multimegabit telemetry demodulator /detector design
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The purpose of this article is to demonstrate analytically tliat the nuiltimegabit telemetry Costas loop demodulator is stable over tlie expected signal dynamic range. The gain margin is about 35.2 dB when M* 4 (sec Fig. 1). It is well known that a digital Costas loop becomes

Measuring demodulator imbalance in radio frequency receivers by tone test
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Abstract The measurement of in-phase/quadrature (IQ) imbalance parameters of radio frequency direct downconversion receivers by tone test is considered. The receiver is excited by a radio frequency sinewave, and the digital baseband output is used as the sole

Ultra wideband chaotic on-off keying modulator and demodulator : Design and Simulation
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ABSTRACT-In this paper we propose, design and simulate the novel structure of to Chaotic On-Off Keying (COOK) modulator and demodulator applicable to Ultra-Wide band (UWB) wireless communications. In the modulation scheme, we use a Quadrature Hybrid Matched

Block IV Subcarrier Demodulator Assembly Acquisition Problem
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The Block IV Subcarrier Demodulator Assembly (SDA) has been designed with four loop bandwidths. Two of these bandwidths are designed with unity damping, while the other two are achieved by increasing the loop gain. Normal tracking can be done in any one of the

Block IV Subcarrier Demodulator Assembly Design
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A design effort was undertaken during the past two years to design and build a Block TV Subcarrier Demodulator Assembly. The salient features that were to be incorporated were:(1) capability of manual or computer control,(2) small size,(3) higher data rate capacity

Co-channel interference rejection using a model-based demodulator
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Abstract Both the Advanced Mobile Phone System (AMPS) and the narrowband version (NAMPS) use frequency modulation (FM) in a frequency division duplex mode. Because such systems typically use the same frequency bands in nearby cells, co-channel

A two channels I/Q- demodulator
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II.MAIN TEXT Provided that on I/Q- demodulator inputs digital readout of signals from exits quadrature analog-digital converters arrive, the block diagram of an one-cascade variant of the I/Q- demodulator is presented on fig. 1. Thus as module I/Q- demodulator in everyone quadrature the channel the

Evaluation of an IQ demodulator
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Abstract We evaluated an IQ demodulator aiming at the usage for the phase measurement of the reflected pulse from the accelerator structure test at Nextef. The characterization of the IQ demodulator was made by varying the input power level both for LO and RF input. We

Fiber optic Sagnac loop with a polarization maintaining photonic crystal fiber as an optical wavelength demodulator for fiber Bragg grating sensors
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Abstract. The properties of a fiber optic Sagnac loop with a polarization maintaining photonic crystal fiber are presented, which is utilized as an optical wavelength demodulator . Owing to the use of a photonic crystal fiber, which has high birefringence and a very low temperature

Wideband RF Signal Generator Implementation for Demodulator /Receiver Testing in Systems of SDR
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AbstractIn this paper, the design of a wideband RF signal generator for demodulator /receiver testing is presented. The design of test generator is based on direct digital synthesizer (DDS) and voltage-controlled oscillator (VCO), controlled by

Design and Implementation of a Multi-Carrier Demodulator
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Abstract:-This paper presents a design and implementation of a multi-carrier demodulator (MCD) circuit. The circuit is designed to handle eight channels at T1 data rates. The design, implementation, and simulations are based on AlteraAPEX20K1500 SRAM PLD devices.

Energy-Detection Based UWB Demodulator with a Supplementary Integration Block
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AbstractIn this paper it is investigated the non-coherent demodulation of the 2PPM modulated UWB signal, based on energy-detection. This type of demodulation leads to a simple receiver architecture, low power consumption and the benefit of multipath energy

Firmware Control of Block IV Ranging Demodulator Assembly
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The Mark III Data System Development Plan is encouraging engineers designing equipment for use in the Deep Space Network to utilize computer control and monitoring. It is becoming apparent that the difficulty of development and cost of software are prohibitive. A concept AbstractAn m-ary adaptive demodulator based on machine learning for light beams carrying orbital angular momentums (OAM) over free-space turbulence channels is proposed and demonstrated. Benefiting from natural advantages in the image recognition,

A New Type of FM Demodulator
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AbstractThe angle demodulator (ADM) is a key component for sensors based on angle modulation such as in the path matched differential interferometry (PMDI). Conventional ADMs require tens of operational amplifiers (OPAMPs) and bulky capacitors and resistors,

MULLTI-CARRIER DEMODULATOR ASIC DESIGN FOR THE SKYPLEX 2ND GENERATION ONBOARD PROCESSOR
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1 Abstract This paper presents the functionality and performance of the Multi-Carrier Digital Demodulator (MCDD) ASIC developed for the Skyplex 2nd generation on board processor to be embarked on the Hot Bird V satellite. The Skyplex 2nd generation processor will

Single Conversion CMOS A/D Converter for I/Q Demodulator .
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In digital signal processing of carrier frequency transmitted signals (eg radar and telecom), the signal is often represented by a two-dimensional vector. The components In-phase (I) and Quadrature (Q) are found from (1),(2) and (3), where the carrier is an intermediate

An Ultra Low power Current-Mode Amplitude Shift Keying Demodulator Dedicated for Implantable Electronic Devices
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Abstract In this paper a novel ultra low power CMOS integrated amplitude shift-keying (ASK) demodulator is presented which is dedicated for implantable electronic devices (IED). The proposed ASK demodulator (ASKD) has a simple structure, is optimized in order to consume

A SIMPLE APPROACH TO DESIGN TELE-COMMAND DECODER A FPGA IMPLEMENTATION OF ZCD BASED FSK DEMODULATOR
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ABSTRACT The paper describes a simple technique used to implement a Tele-Command decoder system in Field Programmable Gate Array (FPGA). Tele-Command decoders are critical part for a Flight Vehicle such as Unmanned Air Vehicle (UAV) under test in terms of a

An United Demodulator of MLSE and Viterbl Decoder (UDMV)
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FSK DemodulatorCase Study of PLL Application
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AbstractFSK Demodulator one of the applications of PLL has been implemented using both hardware and software. Results are found to be similar and based on these results it is believed that this will contribute for the improvement in performance and reliability for future

Audio Band Digital AM Demodulator
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Abstract: AM modulation is often used for radio signals. Most AM radio receivers use analog circuitry to demodulate the received signal. This project develops a proof of concept for demodulating signals digitally. The system digitizes an analog input signal with a frequency

Symbol error rate performance evaluation of the LM37 multimegabit telemetry modulator- demodulator unit
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The LM37 multimegabit telemetry modulator- demodulator unit was tested for evaluation of its symbol error rate {SER) performance. Using an automated test setup, the SER tests were carried out at various symbol rates and signal-to-noise ratios (SNR), ranging from+ 10 to-10

Quadrature demodulator controller
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FEATURES Generates all control signals for Quadrature Phase-Shift Keying (QPSK) and Binary Phase-Shift Keying (BPSK) demodulation Can be used in applications with low Eb/No and high symbol rate (up to 30106 symbols/s) Digital I and Q outputs (3 bits) for soft decision within

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