Flexible MultiCAP Modulation and its Application to 850 nm VCSEL-MMF Links

Puerta, Rafael; Olmos, Juan José Vegas; Monroy, Idelfonso Tafur; Ledentsov, N. N.; Turkiewicz, J. P.

doi:10.1109/jlt.2017.2701887

Cited by 8 publications

(9 citation statements)

References 19 publications

(9 reference statements)

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“…In spite of this, it may still cause penalty when jitter occurs since jitter leads to CAP constellations with not only phase rotation (can be corrected) but also with points more scattered [22]. On this point, K-mean or other nonlinear machine learning equalization schemes may offer better performance than linear MMA [31][32][33][34]. Note that equalizers alone can not address cycle slip issue.…”

Section: B Timing Recoverymentioning

confidence: 99%

Multi-band CAP for Next-Generation Optical Access Networks Using 10-G Optics

Wei

2018

J. Lightwave Technol.

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Section: B Timing Recoverymentioning

confidence: 99%

Multi-band CAP for Next-Generation Optical Access Networks Using 10-G Optics

Wei

2018

J. Lightwave Technol.

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“…To mitigate this impairment, MB‐CAP has been proposed for wireless and optical links, achieving high spectral efficiencies over large bandwidths 20–25,30,31 . By splitting the spectrum into sub‐bands, MB‐CAP modulation enables the use of bit‐ and power‐loading techniques for each band independently, 20–25,30,31 according to the signal‐to‐noise ratio (SNR) and channel conditions over the frequency range of each band. Thus, with an adequate number of bands, non‐flat frequency responses, for example, uneven antenna gain and non‐flat frequency response of devices, can be alleviated to maximize spectral efficiency.…”

Section: Frameworkmentioning

confidence: 99%

“…Given the advantages of CAP modulation, its multiband scheme (multiband CAP [MB‐CAP]) was developed and first introduced for fiber‐optic links, 20 demonstrating its flexibility to adapt to the large bandwidths of optical links, while achieving record data rates. In addition, MB‐CAP modulation has some advantages over MB‐OFDM, such as a lower PAPR, maximizing the power amplifiers efficiency, and a lower computational complexity 20–25 . Thus, the flexible nature of MB‐CAP modulation is highly suitable for UWB wireless communication systems, allowing to adjust the power and bandwidth used to comply with a variety of current regulatory UWB standards 6–8…”

Section: Introductionmentioning

confidence: 99%

Ultra‐wideband technology: Prospective solution for 5G ultra‐small cell networks

Puerta

Rommel

Jaramillo-Ramírez

et al. 2020

Int J Communication

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SummaryExhaustive research is being done to establish the technologies and standards of the fifth generation (5G) of wireless communication systems. Some of the most challenging requirements of 5G systems are to increase the spectral efficiency and the capacity by a factor of 10 and 1,000, respectively. New technologies must offer an adequate framework for the 5G uses cases, which will enable higher capacities and the flexibility to adapt to dynamic scenarios. To cope with these challenging demands, a compelling approach is to exploit the current radio service bands by means of spectrum sharing and cooperation techniques, which alleviate the bandwidth requirements. In addition, advanced modulation schemes have a fundamental role in ensuring the best usage of the spectrum available in band‐limited systems. In this manuscript, we present the ultra‐wideband (UWB) technology as a prospective solution for 5G picocells and femtocells. Its main feature is its capability to operate simultaneously, without introducing interference, with current radio services on an unlicensed basis. We report experimental results reaching data rates up to 35 Gbit/s using the multiband approach of carrierless amplitude phase (MB‐CAP) modulation. To validate the versatility of the proposed system, our experimental tests were performed under the UWB regulations defined by the United States' Federal Communications Commission (FCC), the European Electronic Communications Committee (ECC), and the Russian State Committee for Radio Frequencies (SCRF). The regulations chosen provide diversity enough to demonstrate the capacity of MB‐CAP modulation to comply with worldwide regulations.

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“…This scheme allows to transmit two independent streams of data simultaneously. One stream is transmitted as usually is done in multiband CAP (MB‐CAP) modulation, 27–32 while the second stream determines which frequency bands set is to be transmitted. Figure 1 shows the block diagram of this IM scheme.…”

Section: Multicarrier Qam/cap Index Modulationmentioning

confidence: 99%

Multiband carrierless amplitude and phase index modulation

Puerta

Vesga

Jaramillo-Ramírez

2020

Int J Communication

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SummaryAs 5G standards continue to evolve, the need for communication systems with higher data rates is clear. However, the available bandwidth in the spectrum in most of the cases is limited and is not sufficient to satisfy future demands. Higher data rates drive the need for more efficient schemes to transmit information. Currently, there are different physical‐layer (PHY) technologies that enable increasing data rates with a limited bandwidth such as flexible multicarrier waveforms and channel coding schemes. Index modulation (IM), which uses alternative ways to transmit extra information compared to traditional communication systems, is an innovative PHY solution to increase capacity and spectral efficiency (SE). In this paper, a new IM scheme based on multicarrier quadrature amplitude modulation/carrierless amplitude phase (QAM/CAP) modulation is presented. The property used by this scheme is, provided a contiguous fixed bandwidth, the feasibility to transmit the same amount of data by transmitting different number of contiguous frequency bands by adjusting their bandwidths. To increase the SE, an extra degree of freedom is generated by dynamically changing the distribution of the frequency bands being transmitted, that is, the number of bands used and its bandwidths and subcarrier frequencies. Simulation results are presented to validate the feasibility of the proposed scheme.

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Flexible MultiCAP Modulation and its Application to 850 nm VCSEL-MMF Links

Cited by 8 publications

References 19 publications

Multi-band CAP for Next-Generation Optical Access Networks Using 10-G Optics

Multi-band CAP for Next-Generation Optical Access Networks Using 10-G Optics

Ultra‐wideband technology: Prospective solution for 5G ultra‐small cell networks

Multiband carrierless amplitude and phase index modulation

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