Receiver sensitivity improvement in spectrally-efficient guard-band twin-SSB-OFDM using an optical IQ modulator

Chen, Ming; Peng, Miao; Zhou, Hui; Zhang, Zheng; Tang, Xionggui; Maivan, Lap

doi:10.1016/j.optcom.2017.08.033

Cited by 16 publications

(6 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In these schemes, however, there are two serious shortcomings in the optical SSB system: the first is that the signal-signal beat interference (SSBI) induced by the square-law detection of the photodetector (PD) significantly degrades the system performance, and the second is that the partial bandwidth of the transmitter digital-to-analog converters (DACs) is wasted because the optical SSB signal only carries one sideband information. To improve spectral efficiency, Twin-single sideband (Twin-SSB), an efficient modulation technique evolving from the SSB modulations [ 11 , 12 ], has recently been studied for bandwidth-economic radio communication systems [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ], in which two groups of independent signals are modulated onto the LSB and the RSB [ 24 ]. Compared with the optical SSB system, the optical Twin-SSB system has many advantages.…”

Section: Introductionmentioning

confidence: 99%

Optical Polarization Division Multiplexing Transmission System Based on Simplified Twin-SSB Modulation

Zhou

Ming

Wang

et al. 2022

Sensors

View full text Add to dashboard Cite

Optical twin-single sideband (Twin-SSB) modulation, due to the left sideband (LSB) and right sideband (RSB) signal carrying individual data, has become an attractive technique in fiber transmission because it satisfies the demand of the explosive increase in data traffic. This paper focuses on reducing the complexity of Twin-SSB system and further enhancing the spectral efficiency by proposing a polarization division multiplexing (PDM) Twin-SSB modulation scheme. LSB and RSB signals are extracted using de-mapping algorithm instead of optical bandpass filters (OBPFs) to reduce system complexity. To further improve spectral efficiency, PDM is employed to meet the polarization multiplexing transmission and achieve a higher transmission capacity. Based on the PDM Twin-SSB system, the LSB is 3-arr phase-shift-keying (3PSK) modulated, while RSB is quadrature phase-shift keying (QPSK) modulated. We simulated that the bit error ratio (BER) performance of LSB and RSB of X-polarization (X-Pol) and Y-polarization (Y-Pol) at 8-Gbaud, 10-Gbaud, 12-Gbaud, 14-Gbaud, and 16-Gbaud in the case of back-to-back (BTB) and 2 km standard single-mode fiber (SSMF) transmission. The simulation results verify the effectiveness and practical feasibility of the proposed PDM Twin-SSB scheme for future short-distance transmission owing to low cost, simplified structure, low algorithm complexity, and high data transmission capacity.

show abstract

Section: Introductionmentioning

confidence: 99%

Optical Polarization Division Multiplexing Transmission System Based on Simplified Twin-SSB Modulation

Zhou

Ming

Wang

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

“…The data rate is doubled in comparison with the conventional GB OSSB-OFDM. In our previous work [19], it showed that the receiver sensitivity can be improved by using an optical IQ modulator. The optimal CSPR is still around 0 dB.…”

Section: Introductionmentioning

confidence: 99%

Experimental Demonstration of DFT-Precoded Guard-Band OSSB-OFDM Signal Reception With ADC Undersampling Technique

Ming

Zhang

et al. 2020

IEEE Access

Self Cite

View full text Add to dashboard Cite

Guard-band optical single-side-band orthogonal frequency-division multiplexing (GB-OSSB-OFDM) is a good solution to achieve long-haul transmission as well as high receiver sensitivity. A lowcomplexity receiver with ADC undersampling technique is experimentally demonstrated in a GB-OSSB-OFDM transmission system. The principle of the proposed ADC undersampling technique and the constraint conditions on the use of such a technique are presented and discussed in detail. Besides, the discrete Fourier transform (DFT) precoding technique is also applied to reduce the peak-to-average power ratio (PAPR) of the baseband GB-OFDM signal as well as improve bit error rate (BER) performance. By using the DFT precoding technique, it exhibits that the PAPR of the GB-OFDM signal can be reduced by about 6 dB at the complementary cumulative distribution function (CCDF) of 1×10 −3. After 100 km standard singlemode fiber (SSMF) transmission, the results show that the ADC undersampled low-complexity receiver has similar BER performance with the conventional oversampled GB-OFDM receiver. At the BER of 3.8×10 −3 , the receiver sensitivity in terms of received optical power can be improved by about 2 dB with the DFT precoding technique. INDEX TERMS Guard-band orthogonal frequency-division multiplexing (GB-OFDM), undersampling technique, optical single-sideband (OSSB), discrete Fourier transform (DFT) precoding.

show abstract

“…However, conventional CAP preferred double side band (DSB) modulation and the transmission distance were limited due to frequency selected power fading introduced by chromatic dispersion (CD) [3]. The transmission of single sideband (SSB) optical signal was considered to be more robust against fiber dispersion and power fading, but the signal-signal beat interference (SSBI) generated by square-law detection and aggravated by accumulated dispersion [2,[13][14][15][16] degrades the performance of the SSB system. Recently, different methods have been proposed to mitigate the SSBI effects.…”

Section: Introductionmentioning

confidence: 99%

“…Refs. [2,13] introduced a large guard band between the optical carrier and the modulated signal, but this method will limit the achievable spectral efficiency (SE) significantly. For higher SE, DSP methods were applied to cancel the SSBI without guard bands.…”

Section: Introductionmentioning

confidence: 99%

“…Another shortcoming of the SSB system is that a portion of the bandwidth of digital-to-analog converters (DACs) is wasted since it only carries one piece of sideband information. In order to make full utilization of DAC, a twin-SSB system was proposed [13,17,18], in which two groups of independent signals were modulated onto the right-sideband (RSB) and the left-sideband (LSB), respectively. The twin-SSB application can almost double the SE for a direct detection system.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multi-Twin-SSB Modulation with Direct Detection Based on Kramers–Kronig Scheme for Long-Reach PON Downstream

Gao

Cai

et al. 2019

Applied Sciences

View full text Add to dashboard Cite

As the demand for high data volumes keeps increasing in optical access networks, transmission capacities and distance are becoming bottlenecks for passive optical networks (PONs). To solve this problem, a novel scheme based on multi-twin single sideband (SSB) modulation with direct detection is proposed and investigated in this paper. At the central office, two SSB signals are generated simultaneously with the same digital-to-analog converters (DACs). The twin-SSB signal is not only robust against frequency selected power fading introduced by chromatic dispersion (CD), but also improves the spectral efficiency (SE). By combining a twin-SSB technique with multi-band carrier-less amplitude/phase modulation (multi-CAP), different optical network units (ONUs) can be supported by flexible multi-band allocation based on software-reconfigurable optical transceivers. The Kramers–Kronig (KK) scheme is adopted on the ONU side to effectively mitigate the signal–signal beat interference (SSBI) induced by the square-law detection. The proposed system is extensively studied and validated with four sub-bands using 50 Gbps 16 quadrature amplitude modulation (QAM) modulation for each sub-band using numerical simulations. Digital pre-equalization is introduced at the transmitter-side to balance the performance of different ONUs. After system optimization, a bit error rate (BER) threshold for hard decision forward error correction (HD-FEC) code with 7% redundancy ratio (BER = 3.8 × 10−3) can be reached for all ONUs over 50-km standard single-mode fiber.

show abstract

Receiver sensitivity improvement in spectrally-efficient guard-band twin-SSB-OFDM using an optical IQ modulator

Cited by 16 publications

References 10 publications

Optical Polarization Division Multiplexing Transmission System Based on Simplified Twin-SSB Modulation

Optical Polarization Division Multiplexing Transmission System Based on Simplified Twin-SSB Modulation

Experimental Demonstration of DFT-Precoded Guard-Band OSSB-OFDM Signal Reception With ADC Undersampling Technique

Multi-Twin-SSB Modulation with Direct Detection Based on Kramers–Kronig Scheme for Long-Reach PON Downstream

Contact Info

Product

Resources

About