کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5449216 1512520 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Suppression of laser phase noise in direct-detection optical OFDM transmission using phase-conjugated pilots
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Suppression of laser phase noise in direct-detection optical OFDM transmission using phase-conjugated pilots
چکیده انگلیسی
Due to the unique phase noise (PN) characteristics in direct-detection optical OFDM (DDO-OFDM) systems, the design of PN compensator is considered as a difficult task. In this paper, a laser PN suppression scheme with low complexity for DDO-OFDM based on coherent superposition of data carrying subcarriers and their phase conjugates is proposed. Through theoretical derivation, the obvious PN suppression is observed. The effectiveness of this technique is demonstrated by simulation of a 4-QAM DDO-OFDM system over 1000 km transmission length at different laser line-width and subcarrier frequency spacing. The results show that the proposed scheme can significantly suppress both varied phase rotation term (PTR) and inter-carrier interference (ICI), and the laser line-width can be relaxed with up to 9 dB OSNR saving or even breakthrough of performance floor.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 403, 15 November 2017, Pages 197-204
نویسندگان
, , ,