Spectral shaping for hybrid wired/wireless PON with DC balanced encoding

Saljoghei, Arsalan; Browning, Colm; Barry, Liam P.

doi:10.1109/mwp.2014.6994560

Cited by 5 publications

(7 citation statements)

References 12 publications

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“…Various encoding techniques can be used to alter the properties of a signal's spectral content by rearranging its binary sequence. Line codes that suppress the DC component of a signal can be beneficial in a several aspects as they aid clock recovery at the receiver [23], provide spectral notches at desired frequencies for integration of secondary signals [24] and overcome the issue that many high bandwidth components have minimum frequency cut-offs in the MHz range [25]. The suppression of low frequency spectral content, i.e.…”

Section: Principles Of 8b/10b and Manchester Encoding For Pam4mentioning

confidence: 99%

Mitigation of relative intensity noise of quantum dash mode-locked lasers for PAM4 based optical interconnects using encoding techniques

et al. 2017

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Quantum dash (Q-Dash) passively mode-locked lasers (PMLLs) exhibit significant low frequency relative intensity noise (RIN), due to the high mode partition noise (MPN), which prevents the implementation of multilevel amplitude modulation formats such as PAM4. The authors demonstrate low frequency RIN mitigation by employing 8B/10B and Manchester encoding with PAM4 modulation format. These encoding techniques reduce the overlap between the modulation spectral content and the low-frequency RIN of the Q-dash devices, at the expense of increased overhead. The RIN of the 33.6 GHz free spectral range Q-dash PMLL was characterized, and the results obtained show very high levels of RIN from DC to 4 GHz, but low levels for higher frequencies. The performance improvement for 28 GBaud 8B/10B and Manchester encoded PAM4 signal has been demonstrated compared to the case when no encoding is used. Finally, the effect of RIN on the system performance was demonstrated by comparing the bit error rate (BER) performance of the PAM4 signaling obtained with an external cavity laser (ECL) to those obtained with Q-dash PMLL.

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Section: Principles Of 8b/10b and Manchester Encoding For Pam4mentioning

confidence: 99%

Mitigation of relative intensity noise of quantum dash mode-locked lasers for PAM4 based optical interconnects using encoding techniques

et al. 2017

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“…We propose a straightforward signal processing approach within a single-photodiode framework for the co-detection of hybrid digital and analog RoF signals. Previous studies, such as [11]- [13], have indeed demonstrated the use of a single photodiode for the co-detection of various signals in specific contexts. For example, in the context of passive optical networks (PON), some studies [12], [13] have explored the co-detection of baseband pulse amplitude modulated (PAM) signals, while in wireless communication networks, other studies [11], [12] have investigated the co-detection of non-orthogonal multiple access with carrierless amplitude and phase (CAP) or orthogonal frequency division multiplexing (OFDM) based modulated signals.…”

Section: Introductionmentioning

confidence: 91%

“…By extracting the ARoF signal from the combined signal through subtraction, exploiting the distinct characteristics of DRoF and ARoF signals, improved spectral efficiency can be achieved [10]. Similar studies has also been carried out for hybrid fixed-mobile networks, where the wireless signals are modulated at the null point of the baseband signal for passive optical network (PON) [11]- [13]. Nevertheless, it is worth noting that the focus of the aforementioned research studies primarily revolves around the generation of optical tones to facilitate signal transmission in hybrid optical access technologies.…”

Section: Introductionmentioning

confidence: 96%

A Single-Photodiode Framework for the Co-Detection of Hybrid Digital and Analog Radio-Over-Fiber Signals

Thng,

Mikki

2023

IEEE Access

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The continuous advancement of wireless mobile communication necessitates an increase in the allocated frequency bands for each generation. Consequently, higher frequency photodiodes are required in analog radio-over-fiber (ARoF) fronthaul solutions. However, the limited available bandwidth in the wireless domain poses challenges to efficiently utilize the capacity of these photodiodes. To overcome this obstacle, this paper explores the utilization of a single-photodiode base station configuration to enable hybrid digital radio-over-fiber (DRoF) and ARoF transmission. Furthermore, it proposes a straightforward signal processing approach to effectively separate the distinct analog and digital radio-over-fiber signals.To evaluate the feasibility of the proposed signal processing method, software simulations were conducted. The initial findings indicate that the combination of a single-photodiode base station configuration and the suggested signal processing approach holds promise for hybrid digital and analog radio-over-fiber systems. It demonstrates the potential to minimize the number of required photodiodes, thus improving efficiency in the context of limited available bandwidth.INDEX TERMS Analog radio-over-fiber, centralized radio access network, digital radio over fiberThe co-transport of baseband signals and RF signals through fiber for hybrid optical access networks has gained

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“…Fig. 1(b) shows the architecture of the encoder that produces a signal with multiple in-band notches, further details of such encoding process is also reported in [18,19]. In order to create a spectral null at a desired frequency, the encoder should ensure a finite value of running digital sum (RDS) at that frequency.…”

Section: Operating Principlementioning

confidence: 99%

In-band simultaneous transmission of baseband and broadcast signals in wavelength reused bidirectional passive optical network

Choudhury

2015

Optics Communications

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Spectral shaping for hybrid wired/wireless PON with DC balanced encoding

Cited by 5 publications

References 12 publications

Mitigation of relative intensity noise of quantum dash mode-locked lasers for PAM4 based optical interconnects using encoding techniques

Mitigation of relative intensity noise of quantum dash mode-locked lasers for PAM4 based optical interconnects using encoding techniques

A Single-Photodiode Framework for the Co-Detection of Hybrid Digital and Analog Radio-Over-Fiber Signals

In-band simultaneous transmission of baseband and broadcast signals in wavelength reused bidirectional passive optical network

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