Investigation of Coherent Optical Multiband DFT-S OFDM in Long Haul Transmission

Li, Cai; Yang, Qi; Jiang, Tao; He, Zhixue; Luo, Ming; Li, Chao; Xiao, Xiao; Xue, Daojun; Yi, Xingwen; Yu, Shaohua

doi:10.1109/lpt.2012.2212882

Cited by 24 publications

(9 citation statements)

References 9 publications

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“…In order to improve DSP efficiency, a subbanded CD equalizer has been proposed for single carrier systems where each subband is individually dispersion compensated [7]. Multi-band DFTS (MB-DFTS) OFDM equalization was introduced to realize sub-band CD equalization by allocating a sufficiently large guard interval to reduce the CD equalizer complexity [8]. MB-DFTS OFDM is essentially a single carrier frequency multiplexing (SC-FDM) technique with frequency domain equalization (FDE).…”

Section: Introductionmentioning

confidence: 99%

Chromatic dispersion mitigation in long-haul fiber-optic communication networks by sub-band partitioning

Malekiha¹,

Tselniker²,

Plant³

2015

Opt. Express

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We propose and experimentally demonstrate a novel sub-band multiplexed data architecture for chromatic dispersion (CD) mitigation. We have demonstrated 32 GBaud multi-sub-band (MSB) dual-polarization (DP) 16QAM transmission over 2400 km. Using this approach, the transmitted signal bandwidth is divided into multiple narrow-bandwidth sub-bands, each operating at a lower baud rate. Within each sub-band bandwidth, the CD frequency response can be approximated as a linear-phase band-pass filter, which can be considered as an analog delay that does not require compensation. Therefore, the resulting receiver digital signal processing (DSP) is simplified due to the removal of the CD compensation equalizer. In addition, this leads to efficient parallelization of DSP tasks by deploying multiple independent sub-band processors running at a lower clock rate. The proposed system reduces receiver computational complexity and offers 1 dB higher Kerr-nonlinearity tolerance and 2% extended transmission reach in comparison to the conventional single carrier systems.

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Section: Introductionmentioning

confidence: 99%

Chromatic dispersion mitigation in long-haul fiber-optic communication networks by sub-band partitioning

Malekiha¹,

Tselniker²,

Plant³

2015

Opt. Express

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“…In the RoF systems especially the reverse modulation system, nonlinearity also exists in the fiber transmission, so reducing the impact of the PAPR is a challenge for the designed system. The DFT-Spread technology can be used to reduce the PAPR of the OFDM signal, so that multicarrier modulated OFDM signal can show the characteristics of single-carrier modulated signals [16]. Figure 2 shows the principle of the DFT-Spread OFDM signal generation and recovery.…”

Section: Principle Of Reverse Modulation System With Jointed Dsp Algomentioning

confidence: 99%

60GHz Reverse Modulation Fiber-Wireless System with Two Jointed DSP Algorithms

Chen

Zhao

et al. 2018

Advances in Condensed Matter Physics

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In this paper, we propose a reverse modulation fiber-wireless system with two jointed DSP algorithms. The signal in the system is OFDM modulated millimeter wave (mm-wave) at 60GHz. In order to improve transmission of this system, the discrete Fourier transform spread (DFT-Spread) technology and the averaging of the channel frequency response (H-averaging) technology are applied. The DFT-Spread technology helps to reduce the peak-to-average power ratio (PAPR) of the OFDM signal, and the H-averaging technology helps to optimize channel estimation. This is the first time that the two kinds of technology were used together in this reverse modulation system. According to the simulation, the 22Gbit/s 16QAM-OFDM at 60GHz can be generated and transmitted for 90km fiber transmission under the soft decision forward error correction (SD-FEC) threshold 3.8×10-3. The results show that the two jointed DSP algorithms can improve the reverse modulation system transmission performance obviously.

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“…In the experimental demonstration, the coherent optical orthogonal frequency 16.7 [6] DFT-S PDM-8PSK OFDM C, L 25 2240 SSMF Raman 2012 63 [7] PDM- 16QAM-OFDM C, L 25 160 SSMF Raman 2013 100.3 [8] DFT division multiplexing (CO-OFDM) with discrete Fourier transform spreading (DFT-S) and 128-QAM format was applied. It is noted that DFT-S can reduce the peak-to-average power ratio (PAPR) and mitigate the fiber nonlinearity [9,10] . After C-and L-band transmission over an 80 km standard single-mode fiber (SSMF) at International Telecommunication Union Telecommunication (ITU-T) standardized 25 GHz channel spacing, the SE can be as high as 10.7 bit/s/Hz.…”

mentioning

confidence: 99%

Recent progress in an ‘ultra-high speed, ultra-large capacity, ultra-long distance’ optical transmission system (Invited Paper)

Luo

Li³

et al. 2016

Chin. Opt. Lett.

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From 2010 to 2015, the Wuhan Institute of Posts and Telecommunications (WRI) had undertaken the national key basic research development program project 'ultra-high speed, ultra-large capacity, ultra-long distance (3U) optical transmission based research' as the leading agency. Under the support of the project, we have obtained a series of achievements in scientific research and engineering. Some of the results have been widely used in commercial systems. This Review will make a preliminary summary of the achievements during the past 5 years.

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Investigation of Coherent Optical Multiband DFT-S OFDM in Long Haul Transmission

Cited by 24 publications

References 9 publications

Chromatic dispersion mitigation in long-haul fiber-optic communication networks by sub-band partitioning

Chromatic dispersion mitigation in long-haul fiber-optic communication networks by sub-band partitioning

60GHz Reverse Modulation Fiber-Wireless System with Two Jointed DSP Algorithms

Recent progress in an ‘ultra-high speed, ultra-large capacity, ultra-long distance’ optical transmission system (Invited Paper)

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