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- 저자 : R.P.Labade (검색결과 3 건)
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A Long Reach Coherent m-QAM OFDM PON Downstream Transmission
Vyankatesh Maske,Pawase Ramesh S,R.P.Labade 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.6
In this paper OFDM-PON downstream transmission is demonstrated over different length of fiber at Remote Node (RN) for different m-QAM mapped OFDM signal (m = 4 and16) transmission from the central office (CO) for data rates (10 Gbps) using coherent detection at the user end or optical network unit (ONU). Investigation is performed with different number of sub-carriers back to back optical signal to noise ratio (OSNR) along with transmitted and received constellation diagram for m-QAM mapped coherent OFDM downstream transmission at different speed over different transmission distance. Simulation results suggest the different length and data rate that can be used for different m-QAM mapped coherent detection OFDM downstream transmission and the proposed system may be implemented in Next Generation high speed PONs (NG- PONs).
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Analysis of OFDM WDM using Direct Detection Technique
Vyankatesh Maske,Pawase Ramesh S,R.P.Labade 보안공학연구지원센터 2015 International Journal of Future Generation Communi Vol.8 No.6
This paper presents Long Reach Orthogonal frequency Division multiplexing Wavelength Division Multiplexing (OFDM-WDM) system capable of delivering downstream 40 Gbit/s data. The optical source for downstream data is CW Laser at central office. We use four OFDM transmitter at central office for the 40-Gb/s downstream transmission .We have used direct detection technique for OFDM and did analysis of OFDM WDM using direct detection technique for without compensation and with compensation. We extend the maximum reach of this WDM PON to be 96 km by using Erbium-doped fiber amplifiers at the RN. Bit error rate was measured and constellation diagram observed to demonstrate the proposed scheme. In this paper Long reach and large data service aspects of a OFDM WDM is presented. The results show that the error-free transmission can be achieved for all WDM channels with sufficient power margins.
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Rameshwar Ghule,M.B.Kadu,R.P.Labade 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.4
This paper presents Long Reach Wavelength Division Multiplexing Passive Optical Network (WDM-PON) system capable of delivering downstream 100 Gbit/s data and upstream 100 Gbit/s data on a single wavelength. The optical source for downstream data and upstream data is CW Laser at central office and reflective semiconductor optical amplifier (RSOA) at each optical network unit. We use four RSOAs at each optical network unit for the 100-Gb/s upstream transmission. The operating wavelengths of these RSOAs are separated by the free-spectral range of the optical demultiplexer at the central office and remote node (RN) for demultiplexing the WDM channels. We extend the maximum reach of this WDM PON to be 100 km by using Erbium-doped fiber amplifiers at the RN. Bit error rate, receiver sensitivity were measured to demonstrate the proposed scheme. In this paper Long reach and large data service aspects of a WDM-PON is presented. The results show that the error-free transmission can be achieved for all WDM channels with sufficient power margins.
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