Simple signal-to-signal beat interference cancellation receiver based on balanced detection for a single-sideband optical OFDM signal with a reduced guard band

Ma, Jianxin

doi:10.1364/ol.38.004335

Cited by 30 publications

(10 citation statements)

References 14 publications

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“…Recently, a number of SSBI compensation techniques have been investigated for singlepolarization DD SCM systems, operating either optically [9][10][11] or digitally [12][13][14][15][16][17][18][19][20][21][22][23][24]. The optical schemes offer superior compensation gain, but have the drawback of increasing the optical transceiver complexity.…”

Section: Introductionmentioning

confidence: 99%

Comparison of digital signal-signal beat interference compensation techniques in direct-detection subcarrier modulation systems

Erkılınç

Galdino

et al. 2016

Opt. Express

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Single-polarization direct-detection transceivers may offer advantages compared to digital coherent technology for some metro, back-haul, access and inter-data center applications since they offer low-cost and complexity solutions. However, a direct-detection receiver introduces nonlinearity upon photodetection, since it is a square-law device, which results in signal distortion due to signal-signal beat interference (SSBI). Consequently, it is desirable to develop effective and low-cost SSBI compensation techniques to improve the performance of such transceivers. In this paper, we compare the performance of a number of recently proposed digital signal processing-based SSBI compensation schemes, including the use of single-and two-stage linearization filters, an iterative linearization filter and a SSBI estimation and cancellation technique. Their performance is assessed experimentally using a 7×25 Gb/s wavelength division multiplexed (WDM) single-sideband 16-QAM Nyquist-subcarrier modulation system operating at a net information spectral density of 2.3 (b/s)/Hz.

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Section: Introductionmentioning

confidence: 99%

Comparison of digital signal-signal beat interference compensation techniques in direct-detection subcarrier modulation systems

Erkılınç

Galdino

et al. 2016

Opt. Express

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“…more details for (11) are provided in appendix B. The SNR per subchannel is calculated by As γ 2 grows, so does the signal power σ 2 k(S) , and SSBI as well.…”

Section: B Signal To Signal Beating Interference (Ssbi)mentioning

confidence: 99%

“…One example is the Krames-Kronig method and 4x oversampling [5], [6], or using receiver-based two-stage linearization filter [7], or other digital signal processing (DSP) based methods in [8]- [10]. Hardware cancellation techniques based on balanced receivers [11], [12] can be used in the optical domain. Such techniques increase complexity, thus we focus instead on mitigating SSBI by controlling signal-tocarrier power ratio (SCR or γ 2 ).…”

Section: Introductionmentioning

confidence: 99%

Analytical Study of Optical SSB-DMT With IMDD

Yekani

Amiralizadeh

Rusch

2018

J. Lightwave Technol.

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We theoretically study the performance of single sideband discrete multi-tone (SSB-DMT) in the C-band with intensity modulation and direct detection (IMDD). Our analysis allows us to quantify the impact of different noise sources such as signal-to-signal beating interference, phase-to-amplitude noise, attenuation, and receiver sensitivity on SSB-DMT. Our analytical tools also allow us to optimize the signal-to-carrier power ratio to maximize SSB-DMT throughput. We provide equations to calculate bit error rate of bit allocated SSB-DMT. Finally we examine various system parameters (laser linewidth, system bandwidth, and fiber length) to determine their impact on the performance of zero guard band SSB-DMT.

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“…The degraded BER performances over decreased ROPs are mainly attributed to the ADC quantization noise and photo-diode noise. Therefore, the receiver sensitivity can be further improved by using a suitable linear RF amplifier or high-sensitivity APD photo-detector [25], or optimizing optical carrier-to-signal power ratio (CSPR) [26][27]. The off-line 1024-QAM constellations for optical back-to-back (OBTB) and post-20 km This article has been accepted for publication in a future issue of this journal, but has not been fully edited.…”

Section: B Electrical Back-to-back Performancementioning

confidence: 99%

Experimental Demonstration of Real-Time High-Level QAM-Encoded Direct-Detection Optical OFDM Systems

Chen

Fan

et al. 2015

J. Lightwave Technol.

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In this paper, high-level quadrature amplitude modulation (QAM)-encoded real-time orthogonal frequency division multiplexing (OFDM) transceivers are implemented with two field programmable gate arrays (FPGAs) and high-resolution digital-to-analog converter (DAC) and analog-to-digital converter (ADC). Some key digital signal processing (DSP) algorithms for real-time direct-detection optical OFDM (DDO-OFDM) system are presented and described in detail. To improve the effective number of bits (ENOB) of ADC and reduce quantization noise, the DAC operates at 5 GS/s with an over-sampling factor of 2. Meanwhile, the optimal digital clipping ratio at the transmitter is also investigated by numerical simulation to optimize the performance of the real-time transmitter. The results show that the real-time measured BERs after 10-km SSMF are below the hard-decision forward error correction (HD-FEC) threshold of 3.8 × 10 -3 . For comparison, the off-line BER performance is also analyzed using off-line DSP approaches. It shows that there is a negligible power penalty between the off-line and real-time processing results. To the best of our knowledge, we have achieved the highest modulation format (1024-QAM) for real-time optical OFDM systems.

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Simple signal-to-signal beat interference cancellation receiver based on balanced detection for a single-sideband optical OFDM signal with a reduced guard band

Cited by 30 publications

References 14 publications

Comparison of digital signal-signal beat interference compensation techniques in direct-detection subcarrier modulation systems

Comparison of digital signal-signal beat interference compensation techniques in direct-detection subcarrier modulation systems

Analytical Study of Optical SSB-DMT With IMDD

Experimental Demonstration of Real-Time High-Level QAM-Encoded Direct-Detection Optical OFDM Systems

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