A complete and optimal data allocation method for practical discrete multitone systems

Levin, Harel

doi:10.1109/glocom.2001.965141

Cited by 68 publications

(35 citation statements)

References 4 publications

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“…The estimated SNR is used to adaptively load the subcarriers with variable constellation sizes at different energy levels based on the Levin-Campello algorithm [20]. The algorithm allows more energy to be allocated to the subcarriers, which require minimal additional power to be elevated into larger constellation sizes, while preserving the probability of error target, P T e .…”

Section: Vlc Systemmentioning

confidence: 99%

Towards 10 Gb/s orthogonal frequency division multiplexing-based visible light communication using a GaN violet micro-LED

et al. 2017

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Visible light communication (VLC) is a promising solution to the increasing demands for wireless connectivity. Gallium nitride micro-sized light emitting diodes (micro-LEDs) are strong candidates for VLC due to their high bandwidths. Segmented violet micro-LEDs are reported in this work with electrical-to-optical bandwidths up to 655 MHz. An orthogonal frequency division multiplexing-based VLC system with adaptive bit and energy loading is demonstrated, and a data transmission rate of 11.95 Gb/s is achieved with a violet micro-LED, when the nonlinear distortion of the micro-LED is the dominant noise source of the VLC system. A record 7.91 Gb/s data transmission rate is reported below the forward error correction threshold using a single pixel of the segmented array when all the noise sources of the VLC system are present.

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Section: Vlc Systemmentioning

confidence: 99%

Towards 10 Gb/s orthogonal frequency division multiplexing-based visible light communication using a GaN violet micro-LED

et al. 2017

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“…The algorithm is based on the work of Levin [12] and performs bit and energy allocation based on the achievable SNR for each communication link. The same bit and energy loading algorithm has been used to achieve the results in [6].…”

Section: Modulation Parametersmentioning

confidence: 99%

Towards a 100 Gb/s visible light wireless access network

Tsonev¹,

Videv²,

Haas³

2015

Opt. Express

331

165

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Abstract:Potential visible light communication (VLC) data rates at over 10 Gb/s have been recently demonstrated using light emitting diodes (LEDs). The disadvantage is, LEDs have an inherent trade-off between optical efficiency and bandwidth. Consequently, laser diodes (LDs) can be considered as a very promising alternative for better utilization of the visible light spectrum for communication purposes. This work investigates the communication capabilities of off-the-shelf LDs in a number of scenarios with illumination constraints. The results indicate that optical wireless access data rates in the excess of 100 Gb/s are possible at standard indoor illumination levels.

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“…Finally, additional bits are placed in a Hughes-Hartogs/Levin-[12] -like fashion. Levin [12] introduced a bit-swapping argument when allocating bits.…”

Section: Discrete Multitone (Dmt)mentioning

confidence: 99%

OFDM/DMT for Wireline Communications

Henkel

Mayrock

Haunstein

et al. 2011

Signals and Communication Technology

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With wireline, we mean digital subscriber lines as well as optical transmission. Apart from the general aspects of multicarrier modulation, the channel properties are very different. It is thus unavoidable to go into some details of channel transfer characteristics and disturbances. In DSL, the channel characteristics are determined by the propagation constant, the characteristic impedance, and the loop structure, furthermore crosstalk from other loops and ingress (RFI, impulse noise) from outside. In copper loops, the frequency dependent transfer function of the twisted pairs together with possible reflections at splices lead to dispersion which we will also see in optical transmission. There, we distinguish chromatic dispersion and polarization mode dispersion. Optical transmission especially also suffers from non-linear characteristics (Kerr effect), which does not have a counterpart in copper cables. In copper transmission, non-linearities are especially due to the limitations of the D/A converters and power amplifiers, which may lead to clipping of the almost Gaussian distributed time-domain signal of OFDM. This holds for all OFDM transmission. Other nonlinearities may be due to baluns (transformers) used in DSL, but practically, they are of minor relevance.In the following two sections, we will study properties of the channel and specialties of the multicarrier transmission over twisted pairs and optical fibers. Thereafter, we consider a new approach for impulse noise cancellation in DSL and the simulation of optical multicarrier transmission. Discrete MultiTone (DMT) and WirelineChannel Properties W. Henkel, Jacobs University Bremen, GermanyThis chapter describes basic properties of the wireline twister-pair channel and introduces DMT (Discrete MultiTone), the baseband variant of OFDM. Further information can, e.g., be found in a student book project [1], or [2-5]. Properties of the Twisted-Pair ChannelThe twisted pair (TP) cable channel is characterized by a transfer function that is increasingly attenuating with frequency and cross-talk functions that increase with frequency, as well. Furthermore, ingress from radio interferers (RFI), e.g., amateur radio, and impulse noise have a strong impact. In the following, we describe the

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A complete and optimal data allocation method for practical discrete multitone systems

Cited by 68 publications

References 4 publications

Towards 10 Gb/s orthogonal frequency division multiplexing-based visible light communication using a GaN violet micro-LED

Towards 10 Gb/s orthogonal frequency division multiplexing-based visible light communication using a GaN violet micro-LED

Towards a 100 Gb/s visible light wireless access network

OFDM/DMT for Wireline Communications

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