Phase Noise Estimation and Compensation
Feedforward Data Aided Phase Noise Estimation from a DCT Basis Expansion
... Phase noise refers to random perturbations in the carrier phase, caused by imperfections in both transmitter and receiver ...oscillators. Compensation of this phase noise is ...
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The Effect and Compensation of Phase Noise on Orthogonal Frequency Division Multiplexing (OFDM) System
... OFDM signal is generated from 64 quadrature-amplitude modulation (QAM) under inverse fast Fourier transform (IFFT). In order to avoid inter-carrier in- terference, cyclic prefix, a repetition of last couple of symbol ...
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Database Based Phase Noise Compensation in CO-OFDM Transmission
... optical phase noise impact due to fiber linear and nonlinear effects and establish the optimal approach to estimate the phase evolution of OFDM signals in order to ascertain its suitability for ...
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Phase noise mitigation in coherent transmission system using a pilot carrier
... carrier phase estimation is depicted in ...the phase noise passes through both transmission fibers and the digital CD equalization module, and so the net dispersion experienced by the ...
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Phase noise cancellation in coherent communication systems using a radio frequency pilot tone
... dispersion compensation can be distorted by the phenomenon of equalization-enhanced phase noise (EEPN), due to the reciprocities between the dispersion compensation unit and the local ...
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Nonlinear Phase Noise Estimate Based on Electronic Orthogonal Coherent for 112 Gb/s PDM 4QAM System
... laser phase noise (LPN) can also be mitigated by feed forward carrier recovery (FFCR) techniques with penalties depending on the transmitter (TX) and receiver (RX) laser linewidth-to-sym- bol rate ratio, ...
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Robust noise power spectral density estimation for binaural speech enhancement in time-varying diffuse noise field
... enhancement, noise power spectral density (PSD) estimation plays a key role in determining appropriate de-nosing ...robust noise PSD estimator for binaural speech enhancement in time- varying ...
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Carrier phase estimation methods in coherent transmission systems influenced by equalization enhanced phase noise
... The performance of the BA carrier phase extraction method with different block size in the 112-Gbit/s NRZ-PDM-QPSK system is illustrated in Fig. 2. The transmission system is with 2000 km optical fiber, which ...
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Analytical estimation in differential optical transmission systems influenced by equalization enhanced phase noise
... laser phase noise (PN) and fiber nonlinear effects ...m-level phase shift keying (m-PSK), the performance of optical fiber transmission systems will be degraded seriously by the phase ...
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Analysis of chromatic dispersion compensation and carrier phase recovery in long haul optical transmission system influenced by equalization enhanced phase noise
... dispersion compensation and carrier phase recovery approaches in the n-PSK and n-QAM coherent optical transmission systems, considering the impacts of ...CD compensation approaches, including the ...
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Receiver implemented RF pilot tone phase noise mitigation in coherent optical nPSK and nQAM systems
... and phase noise, severely impact the performance of high speed optical fiber transmission systems ...dispersion compensation fibers ...sequence estimation (MLSE) method [5,12], a time domain ...
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RF-Pilot Based Frequency Offset Estimation and Phase Noise Compensation for CO-OFDM Systems
... the estimation accuracy that is definitely determined by the number of samples participated in the operation of ...joint compensation scheme is also developed, in which only IFO needs to be estimated by ...
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EEPN and CD study for coherent optical nPSK and nQAM systems with RF pilot based phase noise compensation
... and phase noise, severely impact the performance of high speed optical fiber transmission systems ...dispersion compensation fibers ...sequence estimation (MLSE) method [5], a time domain ...
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1. Impact of jammer noise on blind phase noise compensation in ofdm systems
... the phase noise effects in orthogonal-frequency-division-multiplexing (OFDM) systems, in which the time-average of phase noise within an OFDM symbol block is calculated at the subblock ...the ...
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Probabilistic Identification and Estimation of Noise: Application to MR Images
... the noise-only pixels using probabilistic method requires to define threshold on ‘s’i,e upper and lower threshold, so that a given proportion of all noise-only voxels or pixels fall between these two ...
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Analytical estimation of phase noise influence in coherent transmission system with digital dispersion equalization
... LO phase noise are also considered in our derivation in addition to the enhanced LO phase noise included in the total phase ...intrinsic phase fluctuation from the TX and the LO ...
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Estimation of the Number of Signal Sources in Presence of Mutual Coupling
... This work presents a new method to estimate the number of signal sources in the presence of mutual coupling effect. The subspace methods such as MUSIC algorithm lead to detection errors when the incoming signals are ...
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Study of EEPN mitigation using modified RF pilot and Viterbi Viterbi based phase noise compensation
... carrier phase extraction cannot be done using the optical (RF) pilot scheme as used in this paper, a single tap NLMS filter or the Viterbi-Viterbi algorithm has to be ...carrier phase is estimated using the ...
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Spherical and Ring-Like Configurations for the Gravitodynamical Field
... dispersion compensation techniques such as Dispersion Compensation Fiber (DCF), Electronic Dispersion Compensation (EDC), Optical Phase Conjugation (OPC), compensation using digital ...
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Channel estimation of OFDM Systems by using the Wavelet Decomposition method with different Transforms Techniques
... area unit 0°, 90°, 180°, -90° admire knowledge \'00\', \'01\', \'11\', \'10\',this sort of coding could also be demodulated within the same approach as for non- differential PSK however the part ambiguities are often ...
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