Order adaptive Golomb rice coding for high variability sources

This paper presents a new perspective on the adaptive Golomb Rice codes that is especially suitable for sources having a highly variable distribution in time. Instead of adapting the Golomb Rice parameter, the encoder adapts the order of the symbols based on a count of occurrences measure. The proposed order ...

Frequency domain multipath fading channel simulator integrated with OFDM transmitter for E-UTRAN baseband traffic generator

The purpose of the study is to develop an efficient 3GPP compliant method to simulate multiple independent fading radio channels in software defined Evolved Universal Terrestrial Radio Access Network (E-EUTRAN) traffic generator. In this paper, frequency domain representation of commonly accepted Tapped Delay Line (TDL) model is discussed and three ...

Real-time adaptive equalization for headphone listening

The experienced sound quality produced by headphones varies between individuals. Especially with insert headphones a constant equalization may not work properly, when a specific perceived frequency response is desired. Instead, adaptive individualized equalization can be used. Previously this required multiple sensors in a headphone earpiece. This paper proposes a signal ...

3D thermal simulations and modeling of multi-finger InP DHBTs for millimeter-wave power amplifiers

  • Dupuy J.
  • Johansen T.
  • Konczykowska A.
  • Midili V.
  • Nodjiadjim V.
  • Riet M.
  • Squartecchia M.

This paper presents the comparison between the simulated and measured thermal resistance of InP Double Heterojunction Bipolar Transistors (DHBT). 3D thermal simulations were carried out in order to compute the temperature distribution across the full structure due to a constant power excitation of devices with up to 8 emitter fingers. ...

1310 nm Data transmission using silicon photonic integrated circuit comprising directly modulated DFB laser and SOA

A directly modulated silicon photonic DFB laser integrated with a SOA was used to validate error-free transmission over 25 km of standard single mode fiber at 1310 nm. Data in NRZ format at a rate of 10 Gbit/s with PRBS of length 231-1 were used in the experiment.

Long delay optical feedback sensitivity of hybrid III-V/SOI directly modulated DFB lasers

  • Accard A.
  • Duan G.
  • Gallet A.
  • Grillot F.
  • Huang H.
  • Make D.
  • Olivier S.
  • Schires K.
  • Song M.

Hybrid III-V/SOI DFB lasers subjected to external optical feedback is analyzed. Its impact on optical spectrum, eye diagram and bit error rate (BER) is discussed.

1.55um Directly Modulated Transmission over 66 km of SSMF with an Integrated Hybrid III V SOI DFB Laser

  • Bramerie L.
  • Chaibi M.
  • Cristofori V.
  • Da Ros F.
  • Ding Y.
  • Duan G.
  • Gallet A.
  • Hassan K.
  • Oxenlowe L.
  • Peucharet C.
  • Shen A.

An hybrid III-V/SOI directly modulated DFB laser operating at 1.55 um is fabricated, showing a side mode suppression ratio above 50 dB and a 3-dB bandwidth of 12 GHz. Error-free transmission (BER<10 9) at 10 Gb/s over 66 km-SSMF is demonstrated without dispersion compensation and FEC.

25Gb/s Error-free transmission with a packaged chipset integrating a III-V/SOI DFB laser an electro-absorption modulator and a semiconductor optical amplifier

We report on the first hybrid III-V on silicon integration of a DFB laser, an electro-absorption modulator and a semiconductor optical amplifier. We packaged the fabricated chipset and validated the module through 25Gb/s error-free transmissions for short reach communication applications.

Network Energy: Problematic and solutions towards sustainable ICT

  • Chiaroni D.

The energy efficiency has been identified by international institutions as fundamental to have a major ecological impact on the planet. This paper will draw new technical directions to make the network of tomorrow more sustainable.

Non-orthogonal waveforms for machine type communication

  • Chen X.
  • He X.
  • Miao D.
  • Wang F.
  • Zhao Z.

Summary form only given. Strong light-matter coupling has been recently successfully explored in the GHz and THz [1] range with on-chip platforms. New and intriguing quantum optical phenomena have been predicted in the ultrastrong coupling regime [2], when the coupling strength Ω becomes comparable to the unperturbed frequency of the ...

Comparison of 5G waveform candidates in high speed scenario

  • Chen X.
  • Liu Y.
  • Miao D.
  • Wang F.
  • Zhao Z.
  • Zheng Q.

Summary form only given. Strong light-matter coupling has been recently successfully explored in the GHz and THz [1] range with on-chip platforms. New and intriguing quantum optical phenomena have been predicted in the ultrastrong coupling regime [2], when the coupling strength Ω becomes comparable to the unperturbed frequency of the ...

Packet segmentation for contention-based transmission in 5G

  • Tuo X.
  • Wang F.
  • Wang D.
  • Zhang Y.
  • Zhao Z.

Summary form only given. Strong light-matter coupling has been recently successfully explored in the GHz and THz [1] range with on-chip platforms. New and intriguing quantum optical phenomena have been predicted in the ultrastrong coupling regime [2], when the coupling strength Ω becomes comparable to the unperturbed frequency of the ...

Passive Chaos Bandwidth Enhancement Under Dual-Optical Feedback with Hybrid IIIâ?"V/Si DFB Laser

  • Duan G.
  • Gallet A.
  • Gomez S.
  • Grillot F.
  • Schires K.

The chaotic dynamics of a DFB laser are studied experimentally under a combination of short and long feedbacks. Chaos bandwidth enhancement is demonstrated using a hybrid IIIâ?"V/Si DFB laser with a large relaxation oscillation frequency (ROF) of 14Â GHz. The impact of short feedback on the ROF is studied and ...

Linear Programming Bounds for Entanglement-Assisted Quantum Codes

  • Ashikhmin A.
  • Laim Ching-Yi

In this paper, we define two split weight enumerators for general quantum codes with entanglement assistance, including nonadditive codes. We show that they obey a MacWilliams identity, which allows us to prove algebraic linear programming bounds, such as the Singleton bound, the Hamming bound, and the first linear programming bound. ...

Rate-Memory Trade-off for the Two-User Broadcast Caching Network with Correlated Sources

  • Erkip E.
  • Hassanzadeh P.
  • Llorca J.
  • Tulino A.

This paper studies the fundamental limits of caching in a network with two receivers and two files generated by a two-component discrete memoryless source with arbitrary joint distribution. Each receiver is equipped with a cache of equal capacity, and the requested files are delivered over a shared error-free broadcast link. ...

Telecom Microservices Orchestration

  • Luong D.
  • Mongazon-Cazavet B.
  • Outtagarts A.
  • Thieu H.

The introduction of microservices in cloud infrastructure provides modularity, flexible with distributed software components. In telecom, the Network Function Virtualization (NFV) approach enable running an application as a collection of small components and microservices that share an operating system (OS) or distributed platform across many servers in cloud. In this ...

On the optimality of separation between caching and delivery in general cache networks

  • Avestimehr A.
  • Maddah-Ali M.
  • Naderializadeh N.

We consider a system, containing a library of multiple files and a general memoryless communication network through which a server is connected to multiple users, each equipped with a local isolated cache of certain size that can be used to store part of the library. Each user will ask for ...

Communication-aware computing for edge processing

  • Avestimehr A.
  • Li S.
  • Maddah-Ali M.

We consider a mobile edge computing problem, in which mobile users offload their computation tasks to computing nodes (e.g., base stations) at the network edge. The edge nodes compute the requested functions and communicate the computed results to the users via wireless links. For this problem, we propose a Universal ...

Characterizing the rate-memory tradeoff in cache networks within a factor of 2

  • Avestimehr A.
  • Maddah-Ali M.
  • Yu Q.

We consider a basic caching system, where a single server with a database of N files (e.g. movies) is connected to a set of K users through a shared bottleneck link. Each user has a local cache memory with a size of M files. The system operates in two phases: ...

Low-Density Code-Domain NOMA: Better Be Regular

  • Shamai (Shitz) S.
  • Shental O.
  • Zaidel B.

A closed-form analytical expression is derived for the limiting empirical squared singular value density of a channel transfer matrix corresponding to sparse low-density code-domain (LDCD) non-orthogonal multiple-access (NOMA) with regular random user-resource allocation. The derivation relies on associating the channel transfer matrix with the adjacency matrix of a large semi-regular ...