Blind adaptive equalization of polarization-switched QPSK modulation
نویسندگان
چکیده
منابع مشابه
Blind adaptive equalization of polarization-switched QPSK modulation.
Coherent detection in combination with digital signal processing has recently enabled significant progress in the capacity of optical communications systems. This improvement has enabled detection of optimum constellations for optical signals in four dimensions. In this paper, we propose and investigate an algorithm for the blind adaptive equalization of one such modulation format: polarization...
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We present the first experimental results for polarization-switched QPSK (PS-QPSK) and make a comparison with polarization-multiplexed QPSK. Our measurements confirm the predicted sensitivity advantage of PS-QPSK. We have also studied the single channel performance after transmission over 300 km and support the results with numerical simulations. It is shown that the two modulation formats have...
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In this paper, introduced below are the concepts of digital modulation used in many communication systems today. Techniques described include quadrature phase shift keying (QPSK) and quadrature amplitude modulation (QAM) and how these techniques can be used to increase the capacity and speed of a wireless network. These modulation techniques are the basis of communications for systems like cabl...
متن کاملAdaptive Blind Channel Equalization
Shafayat Abrar1, Azzedine Zerguine2 and Asoke Kumar Nandi3 1Department of Electrical Engineering, COMSATS Institute of Information Technology, Islamabad 44000 2Department of Electrical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261 3Department of Electrical Engineering and Electronics, The University of Liverpool, Liverpool L69 3BX 1Pakistan 2Saudi Arabia 3United Kin...
متن کاملModified constant modulus algorithm for polarization-switched QPSK.
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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ژورنال
عنوان ژورنال: Optics Express
سال: 2011
ISSN: 1094-4087
DOI: 10.1364/oe.19.008533