Performance analyses of polarization demultiplexing based on constant-modulus algorithm in digital coherent optical receivers
نویسندگان
چکیده
منابع مشابه
The MSE performance of constant modulus receivers
The constant modulus algorithm (CMA) is an e ective technique for blind receiver design in practice. Treating CMA as a linear estimation problem, e ects of noise and channel conditions are investigated. For the class of channels with arbitary nite impulse responses, an analytical description of locations of constant modulus receivers and an upper bound of their mean squared errors (MSE) are der...
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Convergence properties of the constant modulus (CM) and the Shalvi–Weinstein (SW) algorithms in the presence of noise remain largely unknown. A new geometrical approach to the analysis of constant modulus and Shalvi–Weinstein receivers is proposed by considering a special constrained optimization involving norms of the combined channel-receiver response. This approach provides a unified framewo...
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This paper investigates connections between (nonblind) Wiener receivers and blind receivers designed by minimizing the constant modulus (CM) cost. Applicable to both T-spaced and fractionally spaced FIR equalization, the main results include 1) a test for the existence of CM local minima near Wiener receivers; 2) an analytical description of CM receivers in the neighborhood of Wiener receivers;...
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By using a generalized cost function, a modified constant modulus algorithm (CMA) that allows polarization demultiplexing and equalization of polarization-switched QPSK is found. An implementation that allows easy switching between the conventional and the modified CMA is described. Using numerical simulations, the suggested algorithm is shown to have similar performance for polarization-switch...
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The following methods of CPFSK signals demodulation are compared for phase and polarization diversity receivers: single filter, dual filter, delay and multiply. BER values are obtained in each case showing that for negligible laser linewidths the delay demodulation method outperforms the dual-filter method by approximately 3 dB, and the single-filter method by 6 dB. Since the noise bandwidth fo...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2011
ISSN: 1094-4087
DOI: 10.1364/oe.19.009868