An efficiency optimal dual-frequency constant-envelope multiplexing technique for GNSS signals
Sign Up to like & getrecommendations! Published in 2019 at "GPS Solutions"
DOI: 10.1007/s10291-019-0862-y
Abstract: With the development of global navigation satellite systems (GNSSs), an increasing number of navigation signals are broadcast to provide diversified services for users. In order to save payload resources, multiple signals are required to be… read more here.
Keywords: technique; dual frequency; frequency cem; frequency ... See more keywords
A new method for estimation of orthogonal and phase deviations of constant-envelope signals
Sign Up to like & getrecommendations! Published in 2017 at "Measurement Science and Technology"
DOI: 10.1088/1361-6501/aa8b1f
Abstract: In this paper it is shown that orthogonal deviation increases the ranging error of navigation signals, and a method for the estimation of orthogonal and phase deviation of the I and Q components of a… read more here.
Keywords: deviation; phase; method estimation; orthogonal phase ... See more keywords
Joint Quantized Constant Envelope Precoding and Antenna Selection for Massive MU-MIMO Downlink Systems Using Higher-Order QAM
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Access"
DOI: 10.1109/access.2019.2923202
Abstract: This paper introduces the antenna selection (AS) mechanism into the quantized constant envelope (CE) precoding in massive multiuser multiple-input multiple-output systems to simultaneously reduce multiuser interference and hardware power consumption. However, this joint design problem… read more here.
Keywords: problem; envelope precoding; constant envelope; quantized constant ... See more keywords
Joint estimation of carrier frequency and phase offset based on pilot symbols in quasi-constant envelope OFDM satellite systems
Sign Up to like & getrecommendations! Published in 2017 at "China Communications"
DOI: 10.1109/cc.2017.8019135
Abstract: Spectral efficiency and energy efficiency are two important performance indicators of satellite systems. The Quasi-Constant Envelope Orthogonal Frequency Division Multiplexing (QCE-OFDM) technique can achieve both high spectral efficiency and low peak-to-average power ratio (PAPR). Therefore,… read more here.
Keywords: quasi constant; frequency; pilot; carrier ... See more keywords
Constant Envelope Hybrid Precoding for Directional Millimeter-Wave Communications
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Journal on Selected Areas in Communications"
DOI: 10.1109/jsac.2018.2825820
Abstract: Millimeter wave (mmwave) communication has attracted increasing attention owing to its abundant spectrum resource. The short wavelength at mmwave frequencies facilitates placing a large number of antennas in a small space, and the mmwave channels… read more here.
Keywords: constant envelope; hybrid precoding; communications constant; millimeter wave ... See more keywords
Classification of Spectrally Efficient Constant Envelope Modulations Based on Radial Basis Function Network and Deep Learning
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Communications Letters"
DOI: 10.1109/lcomm.2019.2927348
Abstract: Despite its significance, modulation classification of constant envelope modulations (CEM) has not gained worthy attention in AMC literature so far. Two neural network-based architectures, i.e., radial basis function network (RBFN) and sparse-autoencoder-based deep neural network… read more here.
Keywords: envelope modulations; basis function; constant envelope; classification ... See more keywords
Optimal Constant-Envelope Jamming Waveform Design Against M-QAM Modulation
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Wireless Communications Letters"
DOI: 10.1109/lwc.2022.3161137
Abstract: Recently, unmanned aerial vehicles and Internet-of-Things devices have significantly facilitated daily life, but they can also pose serious threats to public security if maliciously used. An effective way to counteract these threats is to transmit… read more here.
Keywords: modulation; jamming waveform; constant envelope; envelope jamming ... See more keywords
Constant Envelope Precoding for MIMO Systems
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Transactions on Communications"
DOI: 10.1109/tcomm.2017.2754486
Abstract: Constant envelope (CE) precoding is an appealing transmission technique which enables highly efficient power amplification. In this paper, we consider a point-to-point multiple-input multiple-output (MIMO) system with CE precoding under frequency-flat fading, and investigate the… read more here.
Keywords: stream; transmission; stream transmission; envelope precoding ... See more keywords
Efficient LLR Approximation for Coded Constant Envelope OFDM
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Transactions on Vehicular Technology"
DOI: 10.1109/tvt.2022.3231912
Abstract: Constant envelope orthogonal frequency division multiplexing (CE-OFDM) is a promising technique to address the problem of high peak-to-average power ratio (PAPR) by embedding information into the phases of carriers since it was proposed. Meanwhile, in… read more here.
Keywords: ofdm; constant envelope; llr approximation; phase ... See more keywords