Performance Enhancement of Coherent Optical OFDM System Using LMS Algorithm

• Autorzy: Bharti Manisha

Identyfikatory

DOI

10.26636/jtit.2020.137919

• Języki publikacji: EN

Abstrakty

EN

Instability of the local oscillator causes phase noise – a phenomenon that is a disadvantage and is considered to be a major obstacle in the functioning of coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. An attempt has been made in this paper to reduce the effects of common phase errors generated by phase noise. In this paper, a least mean square (LMS) based algorithm is proposed for estimation of phase noise. Using this proposed algorithm, the major problem of phase ambiguity caused by cycle slip is avoided and the bit error rate is greatly improved. Further, there is no requirement for modifying the frame structure of OFDM using this algorithm. A CO-OFDM system with the 8-PSK technique is used to implement the algorithm concerned. Furthermore, the algorithm, using the 8-PSK modulation technique, is analyzed and compared with the existing QPSK technique and with other algorithms. The investigations reveal that 8-PSK outperforms existing LMS algorithms using other techniques and significantly reduces the bit error rate.

Słowa kluczowe

EN

coherent optical-orthogonal frequency division multiplexing (CO-OFDM); common phase error; east means quare (LMS); chase noise

• Wydawca: Instytut Łączności - Państwowy Instytut Badawczy
• Czasopismo: Journal of Telecommunications and Information Technology
• Rocznik: 2020
• Tom: nr 1
• Strony: 1--5
• Opis fizyczny: Bibliogr. 15 poz., rys.

Twórcy

autor

Bharti Manisha

• Department of Electronics and Communication Engineering, National Institute of Technology (NIT), Delhi, Sector A-7, Institutional Area, Narela Delhi - 110040, India

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).