Mitigation of linear and nonlinear impairments in high-speed optical networks by using LDPC-coded turbo equalization

Djordjević, Ivan B.; Minkov, L.L.; Batshon, Hussam G.

doi:10.1109/jsacocn.2008.032908

Cited by 52 publications

(31 citation statements)

References 24 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this section we describe an LDPC-coded turbo equalization scheme [36], as a universal scheme that can be used simultaneously for: (i) suppression of fiber nonlinearities, (ii) PMD compensation, and (iii) chromatic dispersion compensation in multilevel coded-modulation schemes. The LDPC-coded turbo equalizer is composed of two ingredients: (i) the multilevel BCJR algorithm [36], [37] based equalizer, and (ii) the LDPC decoder.…”

Section: Ldpc-coded Turbo-equalization (Te)mentioning

confidence: 99%

See 1 more Smart Citation

Next Generation FEC for High-Capacity Communication in Optical Transport Networks

Djordjević

Arabaci

Minkov

2009

J. Lightwave Technol.

186

View full text Add to dashboard Cite

Abstract-Codes on graphs of interest for next generation forward error correction (FEC) in high-speed optical networks, namely turbo codes and low-density parity-check (LDPC) codes, are described in this invited paper. We describe both binary and nonbinary LDPC codes, their design, and decoding. We also discuss an FPGA implementation of decoders for binary LDPC codes. We then explain how to combine multilevel modulation and channel coding optimally by using coded modulation. Also, we describe an LDPC-coded turbo-equalizer as a candidate for dealing simultaneously with fiber nonlinearities, PMD, and residual chromatic dispersion.

show abstract

Section: Ldpc-coded Turbo-equalization (Te)mentioning

confidence: 99%

“…The LDPC-coded turbo equalizer is composed of two ingredients: (i) the multilevel BCJR algorithm [36], [37] based equalizer, and (ii) the LDPC decoder. The transmitter configuration, for MLC, is already explained previous section [see Fig.…”

Section: Ldpc-coded Turbo-equalization (Te)mentioning

confidence: 99%

Next Generation FEC for High-Capacity Communication in Optical Transport Networks

Djordjević

Arabaci

Minkov

2009

J. Lightwave Technol.

186

View full text Add to dashboard Cite

show abstract

“…The operator describes the signal propagation in the SSMF and is modeled by a pair of nonlinearly coupled nonlinear Schrödinger equations [4], [21]. The electrical receive signal is (5) where is the optoelectronic conversion factor of the photodiode, and are the impulse responses of the optical 2 and electrical filter, respectively. Factor 1/2 comes from the derivation of the equivalent low-pass model, due to a squaring of the carrier, by the photodiode, where the high-frequency component is at 384 THz, for 1550 nm.…”

Section: System Modelmentioning

confidence: 99%

Performance Bounds of Optical Receivers With Electronic Detection and Decoding

Rankl

Speidel

2009

J. Lightwave Technol.

View full text Add to dashboard Cite

Abstract-In this paper, we investigate lower bounds of optical-signal-to-noise ratio (OSNR) for three types of electronic digital-signal-processing (DSP) receivers, which are used for an intensity-modulated and direct-photo-detected optical transmission link. Target is to determine the performance bound of this transmission link if equalization and/or forward error correction (FEC) are used. The investigated DSP methods are hard-input FEC decoding, soft-input FEC decoding, and sequence detection. The impact of chromatic and polarization mode dispersion, as well as the effect of code rate on the bounds, is shown. Signal statistics are computed analytically. Several implementations of coding and detection schemes, such as Reed-Solomon (RS) and low-density parity-check (LDPC) decoding as well as Turbo equalization, are investigated, and we show the distance of their performances to the derived bounds in quite some detail.

show abstract

“…TE routines have been proposed for direct detection optical communication systems in order to mitigate the effects of PMD [15,16]. In coherent detection optical fiber communications, until now, experimental demonstration of low-density paritycheck (LDPC) coded TE [17][18][19] has been presented for polarization multiplexed binary phase-shift keying (BPSK) and QPSK. More recently LDPC-coded TE has also been evaluated in electrical generated PDM orthogonal frequency division multiplexing (OFDM) 16-QAM for transoceanic transmission with large-core/ultra-low-loss fiber [20].…”

Section: Introductionmentioning

confidence: 99%

Turbo Equalization Techniques Toward Robust PDM 16-QAM Optical Fiber Transmission

Arlunno¹,

Caballero²,

Borkowski³

et al. 2014

J. Opt. Commun. Netw.

View full text Add to dashboard Cite

Abstract-In this paper, we show numerically and experimentally that turbo equalization (TE) is an efficient technique to mitigate performance degradations stemming from optical fiber propagation effects in both optical fiber dispersion managed and unmanaged coherent detection links. The effectiveness of the proposed solution can be appreciated in both linear and nonlinear regimes for either scenario. We report on a system employing a polarization division multiplexing (PDM) 16-quadrature amplitude modulation (QAM) format for which we accomplish an increment in tolerance to link input power of up to 3 dB that represents a substantial improvement margin. The best bit error rate (BER) performances will therefore be guaranteed in a larger window, 6 dB, of link input power thanks to the implemented TE scheme. Moreover, our proposed approach is also proven to effectively mitigate interchannel impairments from surrounding amplitude shift-keying interfering channels in a dispersion managed link achieving also in this case an increment in power tolerance of 3 dB. Furthermore, in terms of BER performances, our proposed TE approach guarantees a gain of about a half order of magnitude at the best operational point. As TE can be included in the current coherent detection transceiver technologies and complement other equalization techniques, it has prospects for application in next-generation high-capacity and long-reach optical transmission links.

show abstract

Mitigation of linear and nonlinear impairments in high-speed optical networks by using LDPC-coded turbo equalization

Cited by 52 publications

References 24 publications

Next Generation FEC for High-Capacity Communication in Optical Transport Networks

Next Generation FEC for High-Capacity Communication in Optical Transport Networks

Performance Bounds of Optical Receivers With Electronic Detection and Decoding

Turbo Equalization Techniques Toward Robust PDM 16-QAM Optical Fiber Transmission

Contact Info

Product

Resources

About