Optimization of Emission Waveform by Accelerated Particle Swarm Algorithm Based on Logarithmic Frequency Offset Mathematical Model
Sign Up to like & getrecommendations! Published in 2020 at "Wireless Personal Communications"
DOI: 10.1007/s11277-020-07184-7
Abstract: In this article, a novel technique is applied to achieve time-invariant spatial focusing performance for static and moving target by applying an irregular frequency modulation method to a frequency diverse array (FDA) waveform transmission system.… read more here.
Keywords: frequency; frequency offset; time; particle swarm ... See more keywords
Joint channel/frequency offset estimation and correction for coherent optical FBMC/OQAM system
Sign Up to like & getrecommendations! Published in 2017 at "Optical Fiber Technology"
DOI: 10.1016/j.yofte.2017.09.009
Abstract: Abstract In this paper, we focus on analysis of the preamble-based joint estimation for channel and laser-frequency offset (LFO) in coherent optical filter bank multicarrier systems with offset quadrature amplitude modulation (CO-FBMC/OQAM). In order to… read more here.
Keywords: estimation; fbmc oqam; method; coherent optical ... See more keywords
PAPR assisted FFT-based frequency offset estimation for 32-QAM coherent optical systems
Sign Up to like & getrecommendations! Published in 2020 at "Optical Fiber Technology"
DOI: 10.1016/j.yofte.2019.102126
Abstract: Abstract This paper presents a peak to average power ratio (PAPR) assisted non-data aided feedforward fast Fourier transform (FFT)-based frequency offset (FO) estimation algorithm for 32-ary quadrature amplitude modulation (32-QAM) coherent optical systems. In our… read more here.
Keywords: offset estimation; estimation; fft based; papr assisted ... See more keywords
Frequency ambiguity free tiered differential-polyphase codes for GNSS signal design
Sign Up to like & getrecommendations! Published in 2017 at "Electronics Letters"
DOI: 10.1049/el.2016.3680
Abstract: To resolve frequency ambiguity of tiered polyphase code (TPC), a differential encoding method to the secondary code of the TPC is proposed. By performing differential decoding, the frequency ambiguity is removed and the code sequence… read more here.
Keywords: frequency; frequency ambiguity; ambiguity free; frequency offset ... See more keywords
Ultrahigh-Precision Measurement of the n=2 Triplet P Fine Structure of Atomic Helium Using Frequency-Offset Separated Oscillatory Fields.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.121.143002
Abstract: For decades, improved theory and experiment of the n=2 ^{3}P fine structure of helium have allowed for increasingly precise tests of quantum electrodynamics, determinations of the fine-structure constant α, and limitations on possible beyond-the-standard-model physics.… read more here.
Keywords: offset separated; structure; separated oscillatory; frequency offset ... See more keywords
A Novel PSS Timing Synchronization Algorithm for Cell Search in 5G NR System
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Access"
DOI: 10.1109/access.2020.3048692
Abstract: Cell search is the first step to establish downlink synchronization between user equipment (UE) and base station (BS) in the fifth generation (5G) new radio (NR) system. However, frequency offset and noise will cause a… read more here.
Keywords: frequency offset; synchronization; algorithm; timing synchronization ... See more keywords
Carrier Frequency Offset Estimation in 5G NR: Introducing Gradient Boosting Machines
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Access"
DOI: 10.1109/access.2023.3263053
Abstract: The Beyond fifth Generation (B5G) communication systems imposed several challenges on radio designers. For example, a machine is required to set up a call at a low Signal-to-Noise Ratio (SNR), as low as −10 dB,… read more here.
Keywords: frequency; gradient boosting; frequency offset; estimation ... See more keywords
Low-Complexity Superresolution Frequency Offset Estimation for High Data Rate Acoustic OFDM Systems
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Journal of Oceanic Engineering"
DOI: 10.1109/joe.2018.2869657
Abstract: This paper addresses the problem of compensating for motion-induced Doppler frequency offset in multicarrier acoustic communication systems based on orthogonal frequency-division multiplexing (OFDM). In mobile acoustic systems, Doppler effect can be severe enough that the… read more here.
Keywords: low complexity; frequency; high data; frequency offset ... See more keywords
EKF for Joint Mitigation of Phase Noise, Frequency Offset and Nonlinearity in 400 Gb/s PM-16-QAM and 200 Gb/s PM-QPSK Systems
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Photonics Journal"
DOI: 10.1109/jphot.2017.2649223
Abstract: The performance of higher order modulation formats such as 16-quadrature amplitude modulation (QAM) coherent optical communication systems are limited due to several linear and nonlinear impairments such as phase noise, frequency offset, chromatic dispersion, and… read more here.
Keywords: phase; phase noise; noise frequency; frequency offset ... See more keywords
Efficient Constant Modulus Based Carrier Frequency Offset Estimation for CO-OFDM Systems
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Photonics Journal"
DOI: 10.1109/jphot.2017.2735902
Abstract: This paper proposes a blind carrier frequency offset (CFO) estimation method for coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems, using constant modulus signaling. The proposed scheme is based on a robust cost-function, which deviates… read more here.
Keywords: constant modulus; frequency; ofdm systems; carrier frequency ... See more keywords
Iterative Doppler Frequency Offset Estimation in Satellite High-Mobility Communications
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Journal on Selected Areas in Communications"
DOI: 10.1109/jsac.2020.3005497
Abstract: Satellite communication systems are able to provide diverse services for ground terminals in ubiquitous global coverage, which play a vital role in high-mobility communication environments. Existing technologies developed primarily for satellite communications cannot be readily… read more here.
Keywords: mobility; satellite high; high mobility; frequency offset ... See more keywords