Convergence-Enhanced Subspace Channel Estimation for MIMO-OFDM Systems with Virtual Carriers
Sign Up to like & getrecommendations! Published in 2017 at "Circuits, Systems, and Signal Processing"
DOI: 10.1007/s00034-016-0415-3
Abstract: This paper investigates the convergence-enhanced subspace channel estimation technique for multiple-input–multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) systems with or without virtual carriers (VCs). Since the perturbations of the correlation matrix and the noise subspace are… read more here.
Keywords: estimation; subspace channel; channel estimation; ofdm systems ... See more keywords
Variable Modulation Scheme for Improved Reliability in the OFDM Systems
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DOI: 10.1007/s11277-017-4525-4
Abstract: In order to improve the reliability of the OFDM systems, this paper proposes the variable modulation scheme based on the condition of the channel between the transmitter and the receiver. The proposed scheme uses the… read more here.
Keywords: scheme; ofdm systems; reliability ofdm; modulation scheme ... See more keywords
Performance Enhancement of 5G OFDM Systems Using Modified Raised Cosine Power Pulse
Sign Up to like & getrecommendations! Published in 2019 at "Wireless Personal Communications"
DOI: 10.1007/s11277-019-06322-0
Abstract: OFDM is a key modulation technology of current wireless communication systems such as 4G LTE/LTE-A. The fifth generation (5G) of wireless cellular networks is required to support a large variety of services such as extreme… read more here.
Keywords: raised cosine; ofdm systems; power; modified raised ... See more keywords
A novel improved SLM scheme of the PAPR reduction technology in CO-OFDM systems
Sign Up to like & getrecommendations! Published in 2017 at "Optoelectronics Letters"
DOI: 10.1007/s11801-017-6265-9
Abstract: The higher peak-to-average power ratio (PAPR) is a major shortcoming of coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. Selective mapping (SLM) technology can effectively reduce the probability of high PAPR, but it has higher… read more here.
Keywords: scheme; papr; ofdm systems; novel improved ... See more keywords
Digital baseband predistortion for SSII cancellation in EAM-based direct-detection OFDM systems
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DOI: 10.1016/j.optcom.2016.07.034
Abstract: Abstract To increase the available bandwidth of electro-absorption modulator (EAM)-based direct-detection orthogonal frequency division multiplexing (DD-OFDM) systems, which suffers from dispersion- and chirp-induced power fading, the multiband subcarrier allocation scheme and adaptive modulation formats are… read more here.
Keywords: eam based; based direct; ofdm systems; ssii ... See more keywords
Efficiency enhancement of phase-conjugated twin waves technique by shaping envelopes of subcarriers in all-optical OFDM systems
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DOI: 10.1016/j.optcom.2020.125864
Abstract: Abstract All-optical orthogonal frequency division multiplexing (AO-OFDM) transmission, which employs high-order modulation formats, opens up a new field of advanced optical transmission. However, a major limitation is the impact of Kerr nonlinearity on AO-OFDM systems… read more here.
Keywords: phase; conjugated twin; phase conjugated; shaping envelopes ... See more keywords
Performance evaluation of OFDM systems over α – κ – μ fading
Sign Up to like & getrecommendations! Published in 2019 at "Electronics Letters"
DOI: 10.1049/el.2019.2195
Abstract: In this Letter, the authors derive the moment generating function-based BER expressions for binary phase shift keying and M-QAM signal for OFDM systems over α – κ – μ fading. This fading model is known… read more here.
Keywords: systems fading; ofdm systems; evaluation ofdm; performance evaluation ... See more keywords
A New Approach to Iterative Clipping and Filtering PAPR Reduction Scheme for OFDM Systems
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DOI: 10.1109/access.2017.2751620
Abstract: While achieving reduced/good peak-to-average power (PAPR) in orthogonal frequency division multiplexing (OFDM) systems is attractive, this must not be performed at the expense of the transmitted signal with over-reduced signal power, as it leads to… read more here.
Keywords: reduction; papr reduction; reduction scheme; iterative clipping ... See more keywords
Adaptive Subspace Method for Phase Noise Estimation in CO-OFDM Systems
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DOI: 10.1109/access.2018.2868718
Abstract: In this paper, a blind phase noise estimation method for a coherent optical orthogonal frequency-division multiplexing (CO-OFDM) system is considered. Based on the subspace approach, a simple and robust method is proposed to adaptively estimate… read more here.
Keywords: noise estimation; ofdm systems; subspace; noise ... See more keywords
Analysis and Mitigation of ICI Due to Gain Adjustment in OFDM Systems
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DOI: 10.1109/access.2019.2898457
Abstract: Automatic gain control (AGC) is widely adopted in orthogonal frequency division multiplexing (OFDM) systems to compensate the significant variation of the received signal. In OFDM systems, the duration of the cyclic prefix (CP) is usually… read more here.
Keywords: gain adjustment; ofdm systems; analysis mitigation; gain ... See more keywords
Joint Channel Estimation and Impulsive Noise Mitigation Method for OFDM Systems Using Sparse Bayesian Learning
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Access"
DOI: 10.1109/access.2019.2920724
Abstract: The impulsive noise can deteriorate sharply the performance of orthogonal frequency division multiplexing (OFDM) systems. In this paper, we propose a novel joint channel impulse response estimation and impulsive noise mitigation algorithm based on compressed… read more here.
Keywords: ofdm systems; noise mitigation; estimation; noise ... See more keywords