Comparison of bandwidth expansion methods for optical transmission systems

Pfau, Timo; Krongold, B.S.; Lee, S. C. J.; Kaneda, Noriaki

doi:10.1109/oecc.2012.6276524

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…In [33,34], PS-QPSK and PM-QPSK are compared at the same bit rate when forward error correcting codes (FEC) with different rates are applied to the two formats, and it is argued that PM-QPSK with a larger overhead code could possibly outperform uncoded PS-QPSK. A similar comparison would likely show that 16QAM would outperform both PM-QPSK and 128-SP-QAM, since the extra bit(s) could be used for FEC overhead.…”

Section: Forward Error Correction Codingmentioning

confidence: 99%

Comparison of 128-SP-QAM and PM-16QAM in long-haul WDM transmission

Eriksson¹,

Sjödin²,

Johannisson³

et al. 2013

Opt. Express

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We investigate 128-level set-partitioning quadrature amplitude modulation (128-SP-QAM) experimentally and compare the performance to polarization-multiplexed 16QAM both at the same bit rate and at the same symbol rate. Using a recirculating loop we study both single channel and wavelength-division multiplexing (WDM) transmission and demonstrate a reach of up to 2680 km at a bit-error rate of 10(-3) for 128-SP-QAM. We confirm that 128-SP-QAM has an increased sensitivity compared to PM-16QAM and show that the maximum transmission distance can be increased by more than 50 % at the same bit rate for both single channel and WDM transmission. We also investigate the performance at the same symbol rate as a possible fall back solution in a degrading link.

show abstract

Section: Forward Error Correction Codingmentioning

confidence: 99%

Comparison of 128-SP-QAM and PM-16QAM in long-haul WDM transmission

Eriksson¹,

Sjödin²,

Johannisson³

et al. 2013

Opt. Express

View full text Add to dashboard Cite

show abstract

“…We then use polarization multiplexing to achieve the same SE and bandwidth as 28 Gbaud PS-QPSK. This case has been studied in simulations over an additive white Gaussian noise (AWGN) channel using the same LDPC code as in this paper and it was found that below a BER of ∼ 2.5 × 10 −2 , the LDPC-coded QPSK outperforms PS-QPSK in terms of required OSNR 12 . We assume that an outer FEC code is used, since the BER floor of this LDPC code is not known for the nonlinear fiber channel and it is unfeasible to measure such low BERs with offline processing.…”

Section: Ldpc-coded Modulationmentioning

confidence: 98%