Adaptive Coherent Square QAM Modulation Schemes
Performance analysis of a family of adaptive blind equalization algorithms for square-QAM
... in coherent optical receiver to demulti- plex polarization mode signals adaptively ...an adaptive filter using a feedback structure (which consists of a lossless feed- forward block and a feedback path), and ...
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Blind Adaptive Transmitter IQ Imbalance Compensation in M-QAM Optical Coherent Systems
... V. H ARDWARE C OMPLEXITY C OMPARISON To perform a fair comparison, only the IQ imbalance compensator complexity is compared between the GSOP and BASS methods, regardless of the complexity of the equalizer and other DSP ...
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Comparative performance evaluation of M ary QAM modulation schemes using Simulink and BERTool
... non-square QAM constellations, such as rectangular and cross shape constellations are used ...Rectangular QAM constellations are, in general, sub-optimal in the sense that they do not maximally space ...
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Effect of Adaptive Modulation and Coding Schemes on Scheduling Algorithms for LTE Downlink
... and Adaptive Modulation and Coding (AMC) for realizing Quality of Service (QoS) requirements and optimizing system ...(64 QAM, 16 QAM and QPSK regions) for Constant Bit Rate (CBR) traffic ...
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Robust 9-QAM digital recovery for spectrum shaped coherent QPSK signal
... Generally, the data sampled at the time of T, which is in the center of the symbol, will be recovered. But it suffers from severe intersymbol interference (ISI) under strong filtering. In this paper, we propose to ...
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Error and Efficiency Analysis of Massive 5G Technology with Different QAM Modulation
... the coherent joint ...suggested adaptive LMS, RLS and NLMS based channel estimators, which either require statistical information of the channel or are not efficient enough in terms of performance or ...
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Reduced Complexity Sphere Decoding for Square QAM via a New Lattice Representation
... conventional SD. A brief discussion on how to specify these rules are proposed in Section IV. IV. S IMULATION R ESULTS We have considered 2x2, 4x4, and 6x6 cases using 16- QAM and 64-QAM modulation ...
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BER Evaluation of M-QAM Modulation in Wireless Transmission over AWGN Channel
... level QAM, but has poor BER performance. This is because the higher order M-QAM modulation schemes are vulnerable to errors despite their high spectral ...the adaptive modulation ...
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A new proposed adaptive Cognitive Radio detection system based on MLP neural network for different modulation schemes
... Two features are suggested for CR detector, namely C11 and C20 at carrier frequency of 20 MHz with different multilevel modulation schemes (2FSK, 4FSK, BPSK, QPSK, 8PSK, 4QAM, 16QAM, 64QAM and 256QAM). The ...
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Fading Performance Evaluation of Adaptive MSER Beamforming Receiver for QAM Systems
... of adaptive an- tenna array assisted spatial processing techniques for bandwidth efficiency, high-throughput quadrature amplitude modulation (QAM) ...of adaptive beam- forming assisted ...
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Automatic Modulation Classification in Mobile OFDM Systems with Adaptive Modulation
... feature-based modulation classification was not suitable for the problem stated here mainly due to two reasons: 1, the modulation candidates stem from the same modulation class resulting in nested ...
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Adaptive OFDM Modulation Used For SDR
... standards. Adaptive modulation forms an integral part of SDR system with robust and high data rate ...analyzed adaptive modulation scheme with their performance in changing channel ...The ...
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Error Analysis of 2 tierM ary Star QAM Modulation in Shadowed Fading Channels
... -ary QAM schemes are spectrally efficient modulation schemes which ensures higher data rates without requiring extra ...used square MQAM scheme will have a high chance of false phase ...
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Performance analysis of generalized QAM modulation under η−μ and κ−μ fading
... TQAM schemes as special cases ...a modulation scheme under fading means, in many cases,that the expressions for additive white Gaussian noise are weighted by the probability density function of the ...
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Receiver for QAM Modulation
... In Internet data transmission, the throughput of 45 Mbps is achieved. Now the goal is to increase the data rate further to 100 Mbps and beyond. We designed a Frequency Division Multiple Access system for that and ...
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QAM Modulation With GNU Radio
... by QAM modulation? Quadrature amplitude modulation (QAM) is both an analog and a digital modulation ...digital modulation scheme or amplitude modulation (AM) analog ...
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Adaptive modulation schemes for optical wireless communication systems
... The adaptive modulation scheme here was initially intended to mitigate the data rate drop in a diffuse optical link, where multipath distortion was present ...the adaptive modulation was not ...
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Mitigation of nonlinear transmission effects for OFDM 16-QAM optical signal using adaptive modulation
... specific modulation and coding approaches. We propose and apply here the adaptive modulation technique that aims to reduce the impact of the nonlinear transmission effects at high signal powers, when ...
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Subset Optimization of Adaptive Coding and Modulation Schemes for Broadband Satellite Systems
... and Modulation Schemes suggested for the two standards DVB-S2 and DVB-RCS (in its “advanced” version) is clearly overdimensioned; a subset of schemes can be used by reducing the overall system ...
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On Bit-interleaved Coded Modulation with QAM Constellations
... Introduction This first part of the thesis is intended to give a short introduction to its main topic: BICM with QAM constellations. This introduction is written aiming to facilitate the understanding of the ...
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