M-QAM
Analysis of M-QAM Signals Using Adaptive Detection Approach for Maximum Spectrum Sensing
... wideband M-ary quadrature amplitude modulation (M-QAM) primary signal over multiple non over lapping narrowband Gaussian channels, using the energy detection technique so as to maximize the ...
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Using M QAM OFDM in Downstream Link and WBTW SOA in Upstream of a Bidirectional WDM PON System
... Provisioning broadband services for downloading and uploading high definition data has become a difficult re- quirement for data providers. Covering users’ data de- mand for the future has encouraged many researchers to ...
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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 article, ...
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Signal to noise ratio estimation for M QAM signals in η−μand κ−μfading channels
... In this paper, signal-to-noise ratio (SNR) estimation is carried out by the method of moments (MOM) for fading channels modeled by probability distributions η − μ and κ − μ , considering M-ary quadrature amplitude ...
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M-QAM BER Analysis of ZF MIMO Transmissions with Stochastic Interference Model for LTE
... shows an M -QAM BER calculation method for average interference level and considering the effect of Additive White Gaussian Noise (AWGN). In Section 4 we provide a spatial correlation model, Section 5 ...
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Performance Enhancement for SLM, PAPR Reduction of OFDM A New Phase Sequence Using M-QAM Technique
... ABSTRACT: Multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) technology is in order to increase the diversity gain and system capacity over the time variant frequency-selective ...
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SER/BER expression for M QAM OFDM systems with imperfect channel estimation and I/Q imbalance
... the M-QAM modulated OFDM system in frequency selective Rayleigh fading channel under the effect of trans- mitter and receiver I/Q imbalance and imperfect channel estimation has been ...
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BER Evaluation of M-QAM Modulation in Wireless Transmission over AWGN Channel
... results. M-QAM being an important modulation scheme that allows for higher data rates and spectral efficiencies needs a carefully calculated ...for M-QAM modulation is given by: ...
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BER Performance Simulation of OFDM System with Channel Estimation using M-PSK and M-QAM
... that M-ary phase shift keying (M-PSK) and M-ary quadrature amplitude modulation (M-QAM) in comb type (pilots insert in the time domain) pilot based Least Square Error (LSE) channel ...
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Analysis of PAPR in Precoded OFDM Systems for M - QAM
... Abstract — In Orthogonal Frequency Division multiplexing (OFDM) one of the main drawbacks is High peak to Average Power Ratio. So Reducing the PAPR will reduce the Complexity of Converters (such as Analog to Digital ...
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Reduced Complexity In Phase/Quadrature Phase M QAM Turbo Equalization Using Iterative Channel Estimation
... turbo-equalized M-QAM sys- tems ...turbo-equalized M-QAM sys- tems also employed the Log-MAP algorithm, rather than the less complex and more conventional Viterbi MLSE decoder, in order to ...
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Adaptive OFDM-IM System Over Faded Shadowing Channel
... an M-QAM based scheme to maintain a guaranteed level of average bit error probability (ABEP) with enhanced ...in M-QAM scheme, maximum EE can also be achieved for an acceptable ...with ...
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... Pilot Symbol Assisted Modulation (PSAM) channel estimation techniques have been used extensively and effectively in practical estimation of the channel state information (CSI) for M -ary quadrature amplitude ...
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RELIABILITY OF HIGHER MAPPING TECHNIQUES OVER NOISY CHANNEL WITH OFDM FOR WIRELESS SERVICES
... A simulation program [4] was developed for the Reed-Solomon codes with an error correction capability using simulation with quadrature amplitude modulation scheme in AWGN channel. The symbol error rate performance was ...
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MGF Based Performance Analysis of Digital Wireless System in Urban Shadowing Environment
... adaptive M -QAM technique is proposed to enhance the system ...adaptive M -QAM system is evaluated in terms of outage probability, system capacity (bit/s/Hz) and average bit error ...
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Delay Efficiency Analysis of Turbo Coded Cooperative Communication in Wireless Sensor Networks
... The performance analysis of the delay efficient cooperative communication in WSN using turbo codes is carried out using MATLAB. The performance of turbo coded and uncoded C-MISO systems are compared and the system with ...
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Performance Evaluation of Non linear Equalizer using Different Modulation Techniques
... In this section the equivalent low-pass discrete time model of the system is considered. DPSK and M-QAM modulation techniques are employed in this system.. A frequency selective fading channel modeled by a ...
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Comparative Study of Bit Error Rate with Channel Estimation in OFDM System for M ary Different Modulation Techniques
... The block diagram of the OFDM system with pilot-based channel estimation is shown in fig. 1. The system uses one modulator/de-modulator concept for transmission and receiving of binary data and to evaluate the bit error ...
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Comparative performance evaluation of M ary QAM modulation schemes using Simulink and BERTool
... bandwidth, M-ary Quadrature Amplitude Modulation (M-QAM) is one of widely used modulation techniques in the ...of QAM modulation schemes is an important task for ...paper, M-QAM ...
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Comparison of Bit Error Rate Performance of Different Modulation Techniques over Turbulent FSO Link
... and M-QAM modulation techniques for a turbulent FSO link, we found that for higher order M-QAM, the BER performance of M-QAM degrades ...64- QAM. DPSK and 8-QAM ...
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