Adaptive Modulation for OFDM
Automatic Modulation Classification in Mobile OFDM Systems with Adaptive Modulation
... signalling modulation scheme on per-subcarrier basis would occupy a large portion of transmission ...considered OFDM system, 144 bits were required if trivial source coding scheme was ...fixed ...
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Adaptive Modulation Techniques for Duplex OFDM Transmission
... Adaptive Modulation Techniques for Duplex OFDM Transmission Thomas Keller and Lajos Hanzo Abstract—The design tradeoffs of turbo-coded burst-by-burst adaptive orthogonal frequency division ...
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Adaptive Modulation and Coding Rate for OFDM Systems
... key. OFDM has been recently applied widely in wireless communication systems due to its high data rate transmission capability with high bandwidth efficiency and its robustness to multipath ...of OFDM ...
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Performance Analysis of Adaptive Modulation in OFDM Systems
... Abstract— OFDM technology promises to be a key technique for achieving the high data capacity and spectral efficiency requirements for wireless communication ...of adaptive modulation allows a ...
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Adaptive modulation for enhanced OFDM systems using fuzzy logic
... of OFDM is the efficient usage of the spectrum by making all the subcarriers orthogonal to each ...An adaptive modulation techniques have been proposed according to different parameters to avoid the ...
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Implementation of Ofdm System by Using Convolutional Coding and Bch Coding With Adaptive Modulation
... the OFDM wireless communication system as it merge two adaptive schemes based on modulation and ...of adaptive modulation optimizes the bandwidth efficiency for wireless communications ...
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Simulation of WiMAX System Based on OFDM Model with Difference Adaptive Modulation Techniques
... different adaptive modulation ...an OFDM model in the transmitter and ...the OFDM model and analysis the performance of WiMAX ...of OFDM physical layer in WiMAX system by using ...
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Review on Existing Methods of Adaptive Modulation and Power Allocation using MIMO OFDM
... MIMO OFDM systems multiplex the users both in the frequency and the spatial ...MIMO OFDM systems with co-channel interference, the combination of power control with adaptive modulation is ...
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Performance of STBC based Time Frequency Training OFDM and SC-FDMA with Adaptive Modulation
... TFT OFDM is implemented and STBC based TFT SC-FDMA is porposed,both these systems are implemented with adaptive modulation concept using four modulation schemes ...to Adaptive ...
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Mitigation of nonlinear transmission effects for OFDM 16-QAM optical signal using adaptive modulation
... multiple-carrier OFDM 16-QAM signal and explore the possibilities to mitigate the nonlinear effects at high signal powers through specific modulation and coding ...the adaptive modulation ...
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Fuzzy logic based Adaptive Modulation Using Non Data Aided SNR Estimation for OFDM system
... Key words : Fuzzy logic , Adaptive Modulation , NDA SNR estimation , OFDM 1. Introduction Orthogonal Frequency Division Multiplexing (OFDM) is a special form of multi-carrier transmission ...
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Space Time Trellis and Space Time Block Coding Versus Adaptive Modulation and Coding Aided OFDM for Wideband Channels
... symbol-by-symbol adaptive orthogonal frequency divi- sion multiplex (AOFDM) modems and turbo convolutional channel codecs for enhancing the system’s ...of adaptive modulation ...of adaptive ...
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Space Time Block Coded Adaptive Modulation Aided OFDM
... ventional AOFDM scheme. The associated performance gain im- proves, as the throughput increases. At a throughput of 6 BPS, the space-time coded scheme outperforms the conventional scheme by at least 10 dB in E b /N 0 ...
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Adaptive Modulation Using Neuro-Fuzzy (N-F) Controller for OFDM System
... change modulation scheme (or order) depending on instantaneous Signal to Noise Ratio (SNR) to attain superior performance and capacity compared to fixed modulated ...based adaptive modulation scheme ...
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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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Automatic Modulation Classification for Adaptive Wireless OFDM Systems
... the adaptive modulation at the transmitter and the automatic modulation classification at the receiver ...typical adaptive OFDM-based transmission system which applies ...data ...
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Adaptive OFDM Modulation for Underwater Acoustic Communications: Design Considerations and Experimental Results
... the modulation levels are adjusted while the power is allocated uniformly across the sub-carriers, whereas in the second scheme, both the modulation levels and the power are adjusted ...the ...
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Adaptive Techniques for Multiuser OFDM
... 4.2 ADAPTIVE MODULATION Adaptive modulation is a powerful technique for maximising the data throughput of subcarriers allocated to a ...user. Adaptive modulation involves ...
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Performance analysis of adaptive OFDM modulation scheme in VLC vehicular communication network in realistic noise environment
... adaptive modulation scheme is presented, under simi- lar channel conditions as in the DCO-OFDM with a 8 dB bias and 10 dB bias ...and modulation order of the subcarriers are decreasing with ...
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ADAPTIVE BIT INTERLEAVED CODED MODULATION FOR MOBILE RADIO OFDM SYSTEMS BY USING RICIAN FADING CHANNEL
... uncoded adaptive modulation, although the coding gain of ATCM is small when the CSI is not ...channel adaptive modulation methods that do not require interleaving, ...
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