On-off necklace codes for asynchronous mutual discovery

We consider mutual discovery of asynchronous wireless transceivers with a fixed activity ratio. On-off activity patterns are slotted, and repeat in discovery frames. For discovery it has to be guaranteed that the activity patterns of two transceivers are not overlapping. We design necklace codes determining activity patterns to guarantee discovery ...

Evolution of Social Power for Opinion Dynamics Networks

  • Iglesias Rey S.
  • Silva A.
  • Valenzuela P.

This paper studies the evolution of interpersonal influences in a group as they discuss a sequence of issues following a particular opinion dynamics model. In this work, we propose a general opinion dynamics model and we extend it to the evolution of influence networks using the model of reflected appraisal ...

Spatial mean-field limits for CSMA networks

  • Borst S.
  • Cecchi F.
  • Van Leeuwaarden J.
  • Whiting P.

Random-access algorithms such as the CSMA protocol provide a popular mechanism for distributed medium access control in large-scale wireless networks. Mean-field analysis has emerged as a convenient approach to obtain tractable performance estimates in such networks, but a critical limitation of the classical set-up is that all nodes are assumed ...

Coded fourier transform

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

We consider the problem of computing the Fourier transform of high-dimensional vectors, distributedly over a cluster of machines consisting of a master node and multiple worker nodes, where the worker nodes can only store and process a fraction of the inputs. We show that by exploiting the algebraic structure of ...

Delay Comparison of Delivery and Coding Policies in Data Clusters

A key function of cloud infrastructure is to store and deliver diverse files, e.g., scientific datasets, social network information, videos, etc. In such systems, for the purpose of fast and reliable delivery, files are divided into chunks, replicated or erasure-coded, and disseminated across servers. It is neither known in general ...

Hybrid Resource Allocation for Millimeter-Wave NOMA

  • António Morgado
  • Christos Politis
  • Gacanin H.
  • Jonathan Rodriguez
  • Kazi Mohammed Saidul Huq

The ever-increasing demand for data traffic for future wireless systems poses challenging requirements for 5G wireless communications, such as high spectral efficiency, better interference management, and extensive connectivity. These challenges open the possibility to use non-orthogonal multiple access (NOMA) schemes in future radio access networks. In these schemes, the users ...

Bit- and Power-Loading-A Comparative Study on Maximizing the Capacity of RSOA Based Colorless DMT Transmitters

  • Bonjour R.
  • Brenot R.
  • Gebrewold S.
  • Hillerkuss D.
  • Leuthold J.

We present a comparative study of the capacity increase brought by bit- and power-loading discrete multi-tone (DMT) modulation for low-cost colorless transmitters. Three interesting reflective semiconductor optical amplifier (RSOA) based colorless transmitter configurations are compared: First, an amplified spontaneous emission (ASE) spectrum-sliced source; second, a self-seeded RSOA fiber cavity laser ...

A theoretical analysis of buffer occupancy for Intermittently-Connected Networks

  • Boero L.
  • Cello M.
  • Gnecco G.
  • Marchese M.
  • Patrone F.
  • Sanguineti M.

Network congestion is a well-known problem that may heavily affect the overall network performance. Congestion control approaches in Intermittently-Connected Networks (ICNs) differ from those used in classical networks, since the assumptions of ``universal connectivity{''} of the nodes and ``global information{''} about the network do not hold. In this paper, an ...

Practical LTE and WiFi Coexistence Techniques Beyond LBT

  • Khawer M.
  • Ling J.
  • Lopez-Perez D.

Coexistence with WiFi is the key issue for unlicensed band LTE. The main coexistence mechanism is listen-before-talk, whereby radio frequency energy is sensed over a short period and compared to a threshold. Given the default energy thresholds, the energy sensing range is much less than the cell range. Either technology ...


  • Gurbani V.
  • Loreto S.
  • Subramanyan R.


  • Chen Y.
  • Guo B.
  • Lane N.
  • Liu Y.
  • Yu Z.

Physical-Layer Security With Full-Duplex Transceivers and Multiuser Receiver at Eve

  • Ansari I.
  • Mahmood N.
  • Mogensen P.
  • Popovski Petar
  • Qaraqe K.

Full- duplex communication enables simultaneous transmission from both ends of a communication link, thereby promising significant performance gains. Generally, it has been shown that the throughput and delay gains of full-duplex communication are somewhat limited in realistic network settings, leading researchers to study other possible applications that can accord higher ...

Organic visible light communications: Methods to achieve 10 Mb/s

  • Bausi F.
  • Cacialli F.
  • Darwazeh I.
  • Ghassemlooy Z.
  • Haigh P.
  • Le Minh H.
  • Le S.

In this review, we summarise methods towards achieving 10 Mb/s connectivity for visible light communications links utilising organic polymer based light-emitting diodes as the transmitter. We present two different methods; on-off keying supported by least mean squares equalisation and orthogonal frequency division multiplexing without equalisation.

Timing mismatch tolerance of 16QAM OFDM based spectrum slicing optical transmission systems

  • Le S.
  • Megret P.
  • Nguyen T.
  • Wuilpart M.

We propose an effective synchronization and digital signal processing scheme for OFDM spectrum slicing transmissions in the presence of a large timing mismatch. Without loss of generality, a 76.8 Gbaud DP-16QAM OFDM three-slice spectrum slicing system was considered.

An SDR-based Turbo-SIC Implementation: Towards 5G New Radio Advanced Receiver for Uplink Boosting

  • Harman D.
  • Otterbach J.
  • Samardzija D.
  • Tavares M.
  • Zivkovic M.

Significant uplink capacity improvements in next generation 5G wireless networks, especially in enhanced Machine Type Communications (eMTC) for emerging Internet-of-Things (IoT) applications where the large number of users shares the limited band., can be achieved by assigning the same time-frequency resources to several users simultaneously. This requires advanced signal processing ...

Practical LTE and Wi-Fi Coexistence Techniques beyond LBT

  • Khawer M.
  • Ling J.
  • Lopez-Perez D.

Coexistence with Wi-Fi is the key issue for unlicensed band LTE. The main coexistence mechanism is Listen-Before-Talk, whereby radio frequency energy is sensed over a short period of time and compared to a threshold. Given the default energy thresholds, the energy sensing range is actually much less than the cell ...

Single-Wavelength, Single-Polarization, Single-Photodiode Kramers-Kronig Detection of 440-Gb/s Entropy-Loaded Discrete Multitone Modulation Transmitted over 100-km SSMF

  • A. Mecozzi
  • C. Antonelli
  • Chen X.
  • Cho J.
  • M. Shtaif
  • Sethumadhavan C.
  • Winzer P.

We demonstrate 100-km standard single-mode fibre (SSMF) 1550-nm dispersion-uncompensated transmission and single-photodiode Kramers-Kronig direct detection of 440-Gb/s line rate discrete multitone modulation with entropy- and power-loaded probabilistically shaped subcarriers generated by digital band interleaving

Compression-Based Compressed Sensing

  • Erkip E.
  • Jalali S.
  • Poor H.
  • Rezagah F.

Modern compression codes exploit signals’ complex structures to encode them very efficiently. On the other hand, compressed sensing algorithms recover “structured” signals from their under-determined set of linear measurements. Currently, there is a noticeable gap between the types of structures used in the area of compressed sensing and those employed ...

Proactive Fiber Break Detection Enabled by In-Service Coherent Transceiver

  • Boitier F.
  • Chavarria Valenzuela L.
  • Dutisseuil E.
  • Lemaire V.
  • Pesic J.

we demonstrate on a real-time PDM-QPSK receiver coupled with trained learning machine that digital signal processing used in coherent technologies enable a concurrent monitoring of mechanical events occurring on optical fiber enabling proactive fiber break detection on deployed optical networks.

Integrated ultra-wide band wavelength-tunable hybrid external cavity silicon-based laser

  • Brenot R.
  • Chen Y.
  • De Valicourt G.
  • Debregeas H.
  • Dong P.
  • Earnshaw M.
  • Verdier A.

We demonstrate two novel hybrid lasers with the same III-V gain medium. An hybrid III-V/Si laser and its III-V/SiO2 counterpart exhibit high fiber-coupled output power without booster SOA (up to +13 dBm for III-V/Si and +10 dBm for III-V/SiO2) and a record tuning range (respectively 95 nm and 66 nm) ...