QAM/OFDM
Repeaterless Hybrid CATV/16-Qam OFDM Transport Systems
... A repeaterless hybrid CATV/16-QAM OFDM transport system based on half-split-band and remote light injection techniques is proposed and demonstrated. Over an 80-km SMF transmission without optical ...
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Iterative Looping for Impulsive Noise Channels in QAM- OFDM Based Systems
... In this paper we analyzed the performance of the OFDM transmission scheme corrupted by impulsive noise. Here we have done calculation of SEP for 16- QAM and 64-QAM signals. Specifically, the proposed ...
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Implementation of BER Performance in SFBC/STBC Based On QAM-OFDM Detection Techniques in OFDM Systems
... in OFDM multiplexing is applied to independent signals but these independent signals are a subset of one main ...Therefore OFDM is a combination of modulation and multiplexing with better immunity to ...
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Using M QAM OFDM in Downstream Link and WBTW SOA in Upstream of a Bidirectional WDM PON System
... of OFDM modulation; we used BPSK, 16 QAM, and ...64-QAM OFDM is ...using QAM, an electrical constellation visualizer is ...digital OFDM signal by using 2-QAM or BPSK was ...
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Simulation of 16 QAM OFDM Modulator Using MATLAB
... 16 QAM (M=16) Modulator is simulated for OFDM using MATLAB ...64 QAM [2], [3]. OFDM (Orthogonal Frequency Division Multiplexing) is technology that will certainly play a vital role in next ...
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Probability distribution analysis of M-QAM-modulated OFDM symbol and reconstruction of distorted data
... It is usually assumed that N samples of the time domain orthogonal frequency division multiplexing (OFDM) symbols have an identical Gaussian probability distribution (PD) in the real and imaginary parts. In this ...
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PERFORMANCE,COMPARISION AND IMPROVEMENT USING MIMO TECHNIQUES OF QAM-OFDM IN DIFFRENT WIRELESS CHANNELS.
... increased. OFDM is a one solution for achieving high data rates in mobile environments, due to its resistance to ISI, which is a common problem found in high speed data ...MIMO OFDM under the AWGN Channel, ...
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Design and Implementation of 4 - QAM VLSI Architecture for OFDM Communication
... - QAM (Quadrature Amplitude Modulation) is preferred for OFDM (Orthogonal Frequency Division Multiplexing) based wireless communication ...of QAM is to provide both phase and amplitude modulation. ...
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Study of the BER performance in RoF-OFDM system modulated by QAM and PSK
... the OFDM modulation format we built our proposed design in Optiwave ...in OFDM modulations which are QAM and PSK. Different types of QAM and PSK such as 16-QAM, 8-PSK, and 16-PSK were ...
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PERFORMANCE EVALUATION OF OFDM TRANSCEIVER FOR BPSK & QAM MODULATION TECHNIQUES
... The telecommunication industries insisted on new technology with high transmission abilities standardized by IEEE 802.16 also referred as WiMAX .It has two patterns fixed(802.16d-2004) and mobile(802.16d-2005) which are ...
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Performance of OFDM with enhanced Subcarrier Index Modulation using QAM
... of OFDM- IM. Compared to classical OFDM using QAM, classical OFDM using QPSK doubles the spectral efficiency with no BER performance ...proposed OFDM- GIM1 cannot fundamentally solve ...
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Multi-Target Expansion with QAM Alteration gamble on Beamforming for MIMO-OFDM Interference Channels
... Fig. 1 shows the simple structure of multiuser MIMO-OFDM beamforming model which consists LCP precoder at the transmitter side and sphere decoder at the receiver side. Here, the multiple antennas are processed via ...
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Analysis of PAPR in Precoded OFDM Systems for M - QAM
... Based OFDM system with DFT-Precoder Based OFDM system, WHT-Precoder Based OFDM system, SLM- OFDM (with V=2) system and OFDM-Original system for ...Based OFDM system with ...
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Performance Investigation of CO-OFDM WDM-RoF Network with different Modulation Techniques and Dispersion Compensation using FBG
... (C-OSSB) OFDM system in linear case, and strongercapability of combating the nonlinearity than C-OSSBOFDM ...novel OFDM modulated WDM-ROFsystem by employing a single SC multi-wavelength lightwave source ...
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Performance of OFDM system for AWGN, Rayleigh and Rician Channel
... etc. OFDM system utilized the spectrum with its Orthogonality and in order to reduce ...interference. OFDM has ability to providing much higher spectral efficiency because multiple subcarrier are orthogonal ...
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An Approach for increasing SNR with varying data rate in OFDM transmission system
... Abstract— OFDM is a multi carrier modulation technique in which the carriers are Orthogonal to each others as a result of which it provides high bandwidth efficiency and multiple carriers share the data among ...
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Performance Analysis of Ensemble of Long Irregular LDPC Code over various Channels with Cut off Rate
... a QAM modulated OFDM wave and passing it into the AWGN channel or Rayleigh fading channel or Rician ...the QAM demodulator calculates the llr (log likelihood ratios) followed by the LDPC decoder ...
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FPGA Implementation of OFDM Transceiver using Verilog Hardware Description Language
... of OFDM transmitter will be zero. Various blocks of OFDM transmitter produces a value only when clock is high and reset is ...of QAM consists of 16 bit In- phase and Quadrature components. Output of ...
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High dimensionality carrierless amplitude phase modulation technique for radio over fiber system
... Recently, higher order modulation formats are broadly studied for long haul optical communication systems. These high order modulation formats include quadrature phase shift keying (QPSK), quadrature amplitude modulation ...
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DESIGN OF SIMULINK MODEL FOR OFDM AND COMPARISON OF FFT- OFDM AND DWT-OFDM.
... 64- QAM and 128-QAM (Quadrature amplitude modulation) have been used in the developed OFDM system for both DWT and FFT based ...based OFDM transmitter and receiver that achieve better ...
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