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Carrier phase recovery without pilot sub-carriers in coherent optical OFDM transmission systems
Optical Transmission Systems, Subsystems, and Technologies, 2011A carrier phase recovery method for optical transmission format of 16-QAM constellations is presented. The method can also be used in coherent optical single carrier or OFDM (CO-OFDM) system to implement blind phase recovery with low computational cost.
Wu Liu, Qi Yang
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Carrier Phase Recovery with Linear Modulations
1997In this chapter we investigate algorithms for carrier phase estimation with linear modulations. As with frequency recovery, ML estimation methods will play a central role in our study. We shall see that various approximations to the ML formulation are possible, leading to different estimation methods.
Umberto Mengali, Aldo N. D’Andrea
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Carrier Phase Recovery with CPM Modulations
1997In this chapter we consider carrier phase recovery for CPM signaling. By and large the presentation follows the same route taken with linear modulations. In particular, data-aided (DA) estimation is considered first, then we concentrate on decision-directed (DD) methods and, finally, on non-data-aided (NDA) techniques (either clock-aided or non-clock ...
Umberto Mengali, Aldo N. D’Andrea
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Carrier Phase Recovery for Two Dimensional Digital Communications
IETE Journal of Research, 1987A carrier recovery scheme used for synchronous serial two-dimensional data transmission system is investigated. A decision-directed observation vector, formulated at baseband, permits use of this technique to arbitrary two-dimensional modulation schemes.
S S Pathak, S Prasad
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ML NDA carrier phase recovery for OFDM systems
1999 IEEE International Conference on Communications (Cat. No. 99CH36311), 2003A maximum likelihood (ML) estimation algorithm is derived for carrier synchronization in OFDM systems with MPSK modulation. The algorithm derived is nondecision-aided (NDA) and maximizes the low SNR limit of the likelihood function averaged over the MPSK signal constellation.
A.T. Hug, E. Panayirci, C.N. Georghiades
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PSK Performance with Imperfect Carrier Phase Recovery
IEEE Transactions on Aerospace and Electronic Systems, 1976Methods are given to determine the performance loss caused by imperfect or noisy phase recovery and its use in coherent detection of a PSK signal. Numerical results for both binary and quaternary systems are presented so that these results combined with the characteristics of the phase recovery circuit will enable the "best" practical design of a PSK ...
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Carrier phase and frequency recovery for MIMO-OFDM
IEEE Global Telecommunications Conference, 2004. GLOBECOM '04., 2005A new carrier phase and frequency recovery scheme is proposed for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. The algorithm uses an extended Kalman filter (EKF) to estimate the instantaneous phase and frequency offset.
null Hui Jin +3 more
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Carrier Phase Recovery for Set-Partitioning QAM Formats
Journal of Lightwave Technology, 2018The set-partitioning quadrature amplitude modulation (SP-QAM) formats are highly preferred for the next generation fiber optical transmission system, due to the Euclidean distance increment of constellation and its power efficiency. However, the existing carrier phase recovery (CPR) scheme of SP-QAM is independently implemented between two polarization
Jianing Lu +6 more
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High Performance Carrier Phase Recovery for Coherent Optical QAM
Optical Fiber Communication Conference, 2015A simple feedforward phase recovery algorithm for M-QAM constellations is presented. Performance is evaluated as a function of laser linewidth and SNR for 16- and 64-QAM, and is compared to that of the Blind Phase Search algorithm.
Nikolaos Argyris +3 more
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A Fine Carrier Phase Recovery Method for 32APSK
2018When 32-ary amplitude phase shift keying (32APSK) modulation is used in the communication system, carrier recovery is one of the most important technology. The decision-directed (DD) phase locked loop (PLL) is widely used for carrier recovery. Based on the decision-directed (DD) phase locked loop (PLL) algorithm, the paper proposes a new fine carrier ...
Yulei Nie, Zijian Zhang, Peipei Liu
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