Title:

Performance Enhancement of Coherent Optical OFDM System Using LMS Algorithm, Journal of Telecommunications and Information Technology, 2020, nr 4

Creator:

Bharti, Manisha

Subject and Keywords:

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

Description:

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.

Publisher:

National Institute of Telecommunications

Date:

2020, nr 1

Resource Type:

artykuł

Format:

application/pdf

Resource Identifier:

ISSN 1509-4553, on-line: ISSN 1899-8852

Source:

Journal of Telekommunications and Information Technology

Language:

ang

Rights Management:

Biblioteka Naukowa Instytutu Łączności