کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1533491 1512563 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improved argument-FFT frequency offset estimation for QPSK coherent optical Systems
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Improved argument-FFT frequency offset estimation for QPSK coherent optical Systems
چکیده انگلیسی
A frequency offset estimation (FOE) algorithm based on fast Fourier transform (FFT) of the signal's argument is investigated, which does not require removing the modulated data phase. In this paper, we analyze the flaw of the argument-FFT algorithm and propose a combined FOE algorithm, in which the absolute of frequency offset (FO) is accurately calculated by argument-FFT algorithm with a relatively large number of samples and the sign of FO is determined by FFT-based interpolation discrete Fourier transformation (DFT) algorithm with a relatively small number of samples. Compared with the previous algorithms based on argument-FFT, the proposed one has low complexity and can still effectively work with a relatively less number of samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 360, 1 February 2016, Pages 20-24
نویسندگان
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