Compact undersampled digital predistortion for flexible single-chain multi-band RF transmitter

  • Farrell R.
  • Guan L.
  • Wang Z.

Compact multi-band RF transmitter solution will play a unique role in the forthcoming 4G-beyond and 5G wireless networks. The emerging RF class data convertor, i.e., RFDAC enables a promising single-chain multi-band RF transmitter solution. To combat the imperfections of practical nonlinear power amplifiers in the single-chain multi-band RF solution, we ...

Silicon photonics enabled hyper-wideband wireless communication link

  • Chang C.
  • Chen Y.
  • Chimot N.
  • De Valicourt G.
  • Dong P.
  • Eggleston M.
  • Itoh T.
  • Kaneda N.
  • Kim K.
  • Lelarge F.
  • Sinsky J.
  • Wu M.

We demonstrate the first silicon photonics enabled hyper-wideband wireless link with an instantaneous bandwidth of 12 GHz, which is 85% of the center frequency of 14 GHz. The silicon photonics based RF receiver consists of a four-channel optical phase encoder, an integrated hybrid-silicon mode-locked laser, and two silicon ring notch ...

An 80MHz modulation bandwidth high efficiency multi-band envelope-tracking power amplifier using GaN single-phase buck-converter

  • Asbeck P.
  • Fujiwara T.
  • Kolmonen T.
  • Lanfranco S.
  • Piirainen O.
  • Sakata S.
  • Shinjo S.

We report a high efficiency multi-band Envelope-Tracking Power Amplifier (ET-PA) that supports modulation bandwidth up to 80MHz using real-time digital predistortion (RT-DPD). The ET-PA consists of a broadband RF-PA and a singlephase buck-converter. The RF-PA has maximum PAE over 50% from 0.7 to 2.1GHz in CW measurements. The buck-converter operates ...

On the Design of Preamble for Autonomous Communications with Extended Coverage

  • Balachandran K.
  • Kang J.
  • Karakayali K.
  • Kocak M.
  • Rege K.

5G wireless networks are expected to usher in massive Machine Type Communications (mMTC) pertaining to the Internet of Things (IoT). A large fraction of the devices participating in IoT are likely to be low-power devices that generate sporadic traffic. It is anticipated that autonomous grant-free communications would be needed to ...

Silicon Photonics Enabled Ultra-Wide Bandwidth Free-Space Radio Frequency Link

  • Chang C.
  • Chen Y.
  • De Valicourt G.
  • Eggleston M.
  • Kaneda N.
  • Kim K.
  • Lee S.

We demonstrate the first ultra-wideband RF link enabled by silicon photonics based optical signal proceessing. The system exhibits an instantaneous bandwidth of 12GHz and a carrier frequency of 14GHz. Filtering and phase encoding of 3GHz spaced comb lines allows for RF CDMA and interference rejection.

A New PRACH Transmission Scheme in Unlicensed Spectrum

  • Luo Z.
  • Meng Y.
  • Tao T.

For the unlicensed spectrum, the occupied bandwidth requirement is demanded by some regulations. The legacy scheme of Physical Random Access Channel (PRACH) for Long Term Evolution (LTE) cannot satisfy it. In this paper, we propose a novel PRACH transmission scheme to satisfy the requirement of unlicensed spectrum based on preamble ...

Minimal Noise Variance Decoder for Uncoordinated Multiple Access in VLC

  • Abdullah A Saed
  • Chen C.
  • Jean-Marie Gorce
  • Siu-Wai Ho

This paper proposes an uncoordinated multiple access scheme for visible light communications (VLC) with positioning capability. The sinusoidal-based codes, proposed only for visible light positioning systems, are generalized in this paper by using a novel decoder design. The proposed scheme does not need a central unit to coordinate the transmission ...

Coexistence of 5G With the Incumbents in the 28 and 70 GHz Bands

  • Bechta K.
  • Dietrich C.
  • Ghosh A.
  • Kim S.
  • Moorut P.
  • Visotsky E.

A promising way of realizing the fifth generation (5G) wireless systems is to operate 5G deployments at higher frequency bands, specifically in the millimeter-wave (mmW) spectrum (30â?"300 GHz). Access to such spectrum bands will enable future 5G wireless systems to meet the 5G requirements of peak rate greater than 10 ...

Efficient Fast-Convolution-Based Waveform Processing for 5G Physical Layer

  • Levanen T.
  • Pajukoski K.
  • Pirskanen J.
  • Renfors M.
  • Valkama M.
  • Valkonen S.
  • Yli-Kaakinen J.

This paper investigates the application of fast-convolution (FC) filtering schemes for flexible and effective waveform generation and processing in the fifth generation (5G) systems. FC-based filtering is presented as a generic multimode waveform processing engine while, following the progress of 5G new radio standardization in the Third-Generation Partnership Project, the ...

10G PON Technology Evolution

  • Cheng G.

This article first goes through the different ITU-T standards of 10G PON with relevant definition of wavelengths. Particularly this article shares the view of the latest XGS-PON standard, including its Transmission Convergence sub-layer and Physical Medium Dependent sub-layer, compatibility design with current PON approach and migration solution. This article also ...


  • Benjebbour A.
  • Bulakci Ömer
  • Mezzavilla M.
  • Pedersen K.
  • Prasad A.
  • Pratas N.

Anomaly detection and classification using a metric for determining the significance of failures Case study: mobile network management data from LTE network

  • Hatonen K.
  • Jerome R.

Big data analytics and machine learning applications are often used to detect and classify anomalous behaviour in telecom network measurement data. The accuracy of findings during the analysis phase greatly depends on the quality of the training dataset. If the training dataset contains data from network elements (NEs) with high ...

Experimented phase noise limitations in directly-detected single side-band optical OFDM systems

  • Boffi P.
  • Gatto A.
  • Magarini M.
  • Mandelli S.
  • Martelli P.
  • Morosi J.

We experimentally evaluate the impact of realistic phase noise on single side-band optical OFDM systems, directly detected after uncompensated propagation. Measures obtained with sources typical of short-medium reach applications are compared to a semi-analytical model.

Ultra-low DMG multimode EDFA

  • Chen H.
  • Correa A.
  • Correa R.
  • Eznaveh Z.
  • Fontaine N.
  • Gonnet C.
  • Huang B.
  • Li G.
  • Lopez J.
  • Ryf R.
  • Schulzgen A.
  • Sillard P.
  • Zacarias J.

We demonstrate amplification in a multimode cladding-pumped fiber amplifier supporting 36 spatial modes. Using a large core EDF, we obtain <0.5dB differential modal gain, 16dB gain, and 25dBm output power across the C-band.

40 Gbps PON with 23 dB power budget using 10 Gbps optics and DMT

  • Chow H.
  • Houtsma V.
  • Lee J.
  • Qin C.
  • Van Veen D.
  • Vetter P.

We investigate a symmetrical 40 Gbps PON using 10-Gbps class optical components. We demonstrate transmission at 40 Gbps, with 23-dB power budget and 4.6·10â?'3 BER after 10-km SSMF transmission using discrete multitone IM-DD.

32QAM WDM transmission using a quantum-dash passively mode-locked laser with resonant feedback

  • Aubin G.
  • Brenot R.
  • Calo C.
  • Freude W.
  • Kemal J.
  • Koos C.
  • Lelarge F.
  • Marin-Palomo P.
  • Merghem K.
  • Ramdane A.
  • Randel S.

We demonstrate coherent WDM transmission using a quantum-dash mode-locked laser diode with resonant feedback. We report a line rate of 12 Tbit/s (32QAM 60×20 GBd PDM) over 75 km SMF. The spectral efficiency is 7.5 bit/s/Hz.

Record 6dBm electroabsorption modulated laser for 10Gb/s and 25Gb/s high power budget access networks

  • Achouche M.
  • Barbet S.
  • Blache F.
  • Brenot R.
  • Caillaud C.
  • Debregeas H.
  • Derouin E.
  • Drisse O.
  • Duval B.
  • Fortin C.
  • Garreau A.
  • Gentner J.
  • Glastre G.
  • Goix M.
  • Lanteri D.
  • Lelarge F.
  • Martin F.
  • Mekhazni K.
  • Moustapha-Rabault Y.
  • Nguyen T.
  • Paret J.
  • Pommereau F.
  • Provost J.
  • Saturnin B.

We present an electro-absorption modulated laser with 6dBm modulated power leading to record power budget NRZ transmissions at 1.55μm: 37dB at 10Gb/s over 50km and 30dB at 28Gb/s over 10km with a pre-amplified photodiode.

Experimental characterization of submarine ""open cable"" using Gaussian-noise model and OSNRwet parameter

  • Courtois O.
  • Dubost S.
  • Dupont S.
  • Letellier V
  • Pecci P.
  • Ruggeri S.

With the coherent era, a new parameter called OSNRwet is experimentally studied for ""open cable"" characterization. A +/+0.3dB maximum deviation from the average is found for 3 modulation formats, 3 channel spacings and 3 distances.

Athermal operation of a multi-section laser for optical communications

  • Bello F.
  • Donegan J.
  • Enright R.
  • M-J-Wallace
  • Meehan R.

Two distinct athermal bias current control procedures are demonstrated for a low-cost, monolithic, three section slotted single mode laser, achieving wavelength stability of ±0.01 nm over a temperature range of 10â?"85°C. This is the first time that athermal performance has been demonstrated for a three-section slotted laser with simple fabrication, ...

Distributed rate-adaptive staircase codes for connectionless optical metro networks

  • Gebhard U.
  • Schmalen L.
  • Zhang L.

We demonstrate a multipoint-to-point network architecture for optical metro networks with distributed FEC encoding based on modified staircase codes. We present a simple rate-adaptation scheme and demonstrate throughput maximization on the network.