Comparing System Performance of Optical OFDM Systems Using LMSTE, NLMSTE and DFTE
Volume 4, Issue 6, December 2016, Pages: 169-173
Received: Nov. 25, 2016;
Accepted: Jan. 17, 2017;
Published: Feb. 7, 2017
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Mohammad Ghanbarisabagh, Department of Electrical Engineering, Faculty of Electrical Engineering and Computer Sciences, Islamic Azad University North Tehran Branch, Tehran, Iran
The evaluation of Optical Orthogonal Frequency Division Multiplexing (OOFDM) using Least Mean Square Time-domain Equalizer (LMSTE), its normalized form (NLMSTE) and Decision Feedback Time-domain Equalizer (DFTE) to reduce Cyclic Prefix (CP) length over 1200 Km of Standard Single Mode Fiber (SSMF) is presented. All of these TEQs are used immediately after the fiber channel. They can cancel the residual Inter Symbol Interference (ISI) and Inter Carrier Interference (ICI) caused by both the Group Velocity Dispersion (GVD) and the CP length being shorter than the Channel Impulse Response (CIR). Using these TEQs allow the reduction in size of CP, and consequently leading to system performance improvement. Using DFTE can decrease the noise whereas using NLMSTE can solve the problem of choosing the gain of LMS algorithm to make it stable since LMS algorithm is sensitive to the scaling of its input.
Comparing System Performance of Optical OFDM Systems Using LMSTE, NLMSTE and DFTE, Science Research.
Vol. 4, No. 6,
2016, pp. 169-173.
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