Antenna configuration comparison in challenging NLOS locations

The objective of this paper is to compare uplink (UL) performance with different antenna technologies when receiving Non-Line of Sight (NLOS) signal in field tests. The antenna configurations in use were a passive antenna system and an active antenna system (AAS). The radiation pattern can be controlled horizontally by changing ...

Performance evaluation of adaptive beamforming in 5G-V2X networks

Vehicles are the third fastest growing connected device type after smart phones and tablets. Also, automotive industry is interested to get more vehicles connected to the internet to improve traffic safety and efficiency. This creates a need for Vehicle-to-Everything (V2X) communications. In this work, the possibility of exploiting beamforming in ...

User Association and Resource Allocation Optimization in LTE Cellular Networks

  • Chen C.
  • Eitan Altman
  • Nessrine Trabelsi
  • Rachid El Azouzi
  • Roullet L.

As the demand for higher data rates is growing exponentially, homogeneous cellular networks have been facing limitations when handling data traffic. These limitations are related to the available spectrum and the capacity of the network. Heterogeneous Networks (HetNets), composed of Macro Cells (MCs) and Small Cells (SCs), are seen as ...

Dispersion management for nonlinearity mitigation in two-span 28 GBaud QPSK phase-sensitive amplifier links

  • Andrekson P.
  • Astra E.
  • Eliasson H.
  • Olsson S.

We present an investigation of dispersion map optimization for-span single channel 28 GBaud QPSK transmission systems with phase-sensitive amplifiers (PSAs). In experiments, when the PSA link is operated in a highly nonlinear regime, a 1.4 dB error vector magnitude (EVM) improvement is achieved compared to a one-span optimized dispersion map ...

Semi-analytical evaluation of concatenated RS/LDPC coding performance with finite block interleaving

  • Adriaan Suls
  • Guenach M.
  • Julie N.
  • Lefevre Y.
  • Marc M.

The Monte Carlo (MC) simulation of the error performance of a concatenated coding system with finite interleaving depth between the outer and inner codes is time-consuming, especially when targeting low error rates and examining several interleaver settings. In this contribution we present a semianalytical evaluation of the word error rate ...

Suitability of ITU-R P.1546 propagation predictions for allocating LTE SDL with GE06

The compatibility of Geneva 2006 frequency plan (GE06) assignments and allocations for digital terrestrial television (DTT) is determined using ITU-R P.1546 propagation prediction method. The aim of this paper is to study the suitability of using ITU-R P.1546 propagation predictions for allocating Long Term Evolution (LTE) Supplemental Downlink (SDL) to ...

Viewport-dependent delivery schemes for stereoscopic panoramic video

Stereoscopic panoramic or omnidirectional video is a key ingredient for an immersive experience in virtual reality applications. The user views only a portion of the omnidirectional scene at each time instant, hence streaming the whole stereoscopic panoramic or omnidirectional video in high quality is not necessary and will consume an ...

Lossless compression of subaperture images using context modeling

The paper proposes a method for lossless compression of subaperture image stacks obtained by rectifying light-field images captured by a plenoptic camera. We exploit the similarities between two subaperture images using a predictive coding algorithm, where the current view is predicted from one reference view. Context modeling is the main ...

power saving mechanism for contention-based M2M transmission

  • Wang H.
  • Yang L.

Massive number of devices must operate for a long time with very limited chance to contact energy sources in current Machine-to-Machine (M2M) networks, so power saving mechanism is very essential. In this paper, we analyze energy efficiency of two popular contention based data transmission methods (FSA and CTA) and proposed ...

Massive MIMO in Line-of-Sight Propagation

  • Marzetta T.
  • Yang H.

By calculating the effective max-min SINR (signal-to-interference-plus-noise ratio) and the corresponding power controls explicitly, and selectively dropping a small number of mobiles based on a simple and effective algorithm, we demonstrate that for both downlink and uplink, employing maximum-ratio or zero-forcing linear pre-coding and de-coding, Massive MIMO with max-min power ...

Unique Word DFT-Spread-OFDM for Fast Time-Varying Channels

  • Berardinelli G.
  • Frederiksen F.
  • Mogensen P.
  • Pedersen K.
  • Sorensen T.

Unique Word Discrete Fourier Transform -spread - Orthogonal Frequency Division Multiplexing (UW DFT-s-OFDM) waveform replaces the Cyclic Prefix (CP) with a known sequence which is contained in the symbol itself rather than being appended to it. In this paper, we propose a new UW DFT-s-OFDM design which aims at exploiting ...

Coverage Comparison of GPRS, NB-IoT, LoRa, and SigFox in a 7800 km² Area

  • Kovacs I.
  • Lauridsen M.
  • Mogensen P.
  • Nguyen H.
  • Sorensen M.
  • Vejlgaard B.

In this simulation work the coverage of GPRS, Narrowband-IoT, LoRa, and SigFox is compared in a realistic scenario, covering 7800 km2 and using Telenor's commercial 2G, 3G, and 4G deployment. The target is to evaluate which of the four technologies provides the best coverage for Internet of Things devices, which ...

Towards Zero Data Interruption Time with Enhanced Synchronous Handover

  • Gimenez L.
  • Kolding T.
  • Michaelsen P.
  • Nguyen H.
  • Pedersen K.

This paper presents enhancements for lowering the handover interruption time in future wireless networks. We propose a selective data forwarding for the handover preparation phase, and the integration of the make-before-break procedure with the synchronous random access-less handover. To evaluate our proposals, we analyze the handover timing for typical and ...

Indoor Deployment Strategies for Ultra Dense Urban Areas

  • Kovacs I.
  • Mogensen P.
  • Nguyen H.
  • Tavares F.
  • Wigard J.

Indoor deployments for providing coverage and capacity inside buildings is an attractive option for cellular network operators as most of the traffic in today's cellular networks is generated indoors. This paper studies the benefit of indoor traffic offloading on the overall network capacity using a new method that allows assessing ...

C/U Split Multi-Connectivity in the Next Generation New Radio System

  • Chen J.
  • Chen Z.
  • Chi J.
  • Du L.
  • Liu G.
  • Liu X.
  • Liu Y.
  • Qian X.
  • Yu T.
  • Zhao Z.
  • Zheng N.
  • Zhou H.

The next generation mobile network is foreseen as a heterogeneous network comprising not only the evolved existing systems but also the new radio (NR) spanning over the whole spectrum. Multi-connectivity (MC), where a UE aggregates the radio resources from multiple cells, provides an efficient way to fulfill the diverse 5G ...

Coverage and Capacity Analysis of Sigfox, LoRa, GPRS, and NB-IoT

  • Kovacs I.
  • Lauridsen M.
  • Mogensen P.
  • Nguyen H.
  • Sorensen M.
  • Vejlgaard B.

In this paper the coverage and capacity of SigFox, LoRa, GPRS, and NB-IoT is compared using a real site deployment covering 8000 km2 in Northern Denmark. Using the existing Telenor cellular site grid it is shown that the four technologies have more than 99 % outdoor coverage, while GPRS is ...

HOSVD-Based Denoising for Improved Channel Prediction of Weak Massive MIMO Channels

  • Amin M.
  • Haardt M.
  • Zirwas W.

Future mobile radio systems, like 5G, are setting extremely demanding targets with respect to the number of served users, data rates, and latency etc. Advanced techniques such as massive MIMO and joint cooperation over several distributed radio stations are being developed to achieve these targets. Channel prediction has been deemed ...

Pathloss Measurements and Modeling for UAVs Connected to Cellular Networks

  • Amorim R.
  • Kovacs I.
  • Mogensen P.
  • Sorensen T.
  • Wigard J.

This paper analyzes the radio channel between cellular network and Unmanned Aerial Vehichles (UAVs). The assessment is done by means of field measurements performed in a rural environment in Denmark. The tests were conducted in an operating LTE network (800 MHz), using a commercial cell phone placed inside the frame ...

Energy Efficient Coordinated Self-Backhauling for Ultra-Dense 5G Networks

  • Maeder A.
  • Prasad A.
  • Uusitalo M.

In recent past, the exponential growth in data rate demands have led to network operators constantly upgrading their network infrastructure in order to keep up with the demand. While the trends for data rate requirements are expected to continue in the future, mobile networks as part of evolution towards fifth ...

Big Data Analytics for 4.9G and 5G Mobile Network Optimization

  • Chiu P.
  • Holma H.
  • Luostari R.
  • Reunanen J.

Smartphones and other devices connected to a mobile network typically create billions of measurement samples every day. Those measurements are currently used for instantaneous resource allocation and link adaptation. There is much room for using the measurements also for network optimization with big data analytics. The measurements give valuable insight ...