A complex-weighted, decision-aided, maximum-likelihood carrier phase and frequency-offset estimation algorithm for coherent optical detection
TLDR
A symbol-by-symbol coherent optical receiver employs a novel, complex-weighted, decision-aided, maximum-likelihood (CW-DA-ML) carrier phase and frequency offset estimator, which achieves a complete modulo-R reduced frequency offset estimation (FOE) range of ± R/2.Abstract:
We present a symbol-by-symbol coherent optical receiver, which employs a novel, complex-weighted, decision-aided, maximum-likelihood (CW-DA-ML) carrier phase and frequency offset estimator. The CW-DA-ML carrier estimator uses a CW transversal filter to generate a carrier reference phasor, and the filter weights are automatically adapted on-line by linear regression on the observed signals. A complete modulo-R reduced frequency offset estimation (FOE) range of ±R/2 is achieved, independent of modulation format, where R is the symbol rate. Carrier phase and frequency tracking is achieved rapidly. The acquisition speed of frequency offset in quaternary phase-shift keying (4-PSK) signals is more than 5 times faster than that of differential FOE. A constant penalty of approximately 1 dB at bit-error rate of 10−4 is demonstrated for all frequency offsets in 4-PSK signals with laser-linewidth-symbol-duration product of 8×10−5.read more
Citations
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Journal ArticleDOI
On Decision Aided Carrier Phase and Frequency Offset Estimation in Coherent Optical Receivers
TL;DR: In this paper, a generalized differential encoding rule for signal constellations is presented for coherent optical receivers where the received signal is impaired by additive white Gaussian noise, laser phase noise, and frequency offset.
Journal ArticleDOI
Joint carrier phase and frequency-offset estimation with parallel implementation for dual-polarization coherent receiver.
TL;DR: A dual-polarization complex-weighted, decision-aided, maximum-likelihood algorithm with superscalar parallelization (SSP-DP-CW-DA-ML) for joint carrier phase and frequency-offset estimation (FOE) in coherent optical receivers is presented.
Journal ArticleDOI
Soft-Decision-Aided, Maximum-Likelihood Carrier Phase Estimation for Coherent Optical QAM
Ming-Wei Wu,Pooi Yuen Kam +1 more
TL;DR: A novel, soft-decision-aided, maximum likelihood (SDA-ML) phase estimator is derived for carrier phase estimation in coherent optical communication and outperform the Mth power and DA-ML in the presence of strong linear laser phase noise.
Proceedings ArticleDOI
Research progress of free space coherent optical communication
Zhenkun Tan,Xizheng Ke +1 more
TL;DR: The digital signal modulation, transmission, detection and data recovery are realized by the heterodyne detection technology in the free space optical communication system, and finally the function of smooth viewing high-definition video is realized.
Journal ArticleDOI
Symmetric signal and local oscillator polarization diverse coherent optical receiver.
Neda Nabavi,Trevor J. Hall +1 more
TL;DR: An improved coherent optical receiver architecture that compensates for a random drift in the state of polarization (SOP) of both the signal and the local oscillator (LO) is presented for the first time.
References
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Hardware-Efficient Coherent Digital Receiver Concept With Feedforward Carrier Recovery for $M$ -QAM Constellations
TL;DR: In this paper, the authors proposed a novel digital carrier recovery algorithm for arbitrary M-ary quadrature amplitude modulation (M-QAM) constellations in an intradyne coherent optical receiver.
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TL;DR: In this paper, a coherent optical receiver for demodulating optical quadrature phase-shift keying (QPSK) signals is proposed. But the authors do not consider the phase-diversity homodyne detection at the receiver.
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Frequency Estimation in Intradyne Reception
TL;DR: In this article, an optical intradyne receiver experiment with frequency estimation is reported. But this experiment was performed prior to block phase estimation or other phase recovery techniques, for a much higher frequency difference between transmit laser and local oscillator laser.
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