Wireless Systems Performance

Air InterfaceSmart Antennas/MIMOFull DuplexDronesRelay NetworksSatellite Communications

Simulation based performance evaluation of wireless cellular communications systems:

  • GSM
  • CDMA/UMTS
  • LTE/LTE-A

LTE_throughput_AS

  • Performance
  • Implementation issues
  • Field trials
SDMA Field Trial IS-95 MICROCELLS SMART ANTENNAS
SDMA_Field_Trials

SDMA Field Trials

IS95MicrocellsSmartAntennas
  • In-Band Full Duplex Relaying
  • MISO Beamforming
  • Large Arrays

 

 

system

System model of IBFD relaying (Elsevier, ICT EXPRESS, 2015)

Self_Interference

Self-interference at the IBFD relay for a large number of antenna elements. (Elsevier, ICT Express, 2015)

SIR

Average SIR at both the access and backhaul links for different number of antenna elements (Elsevier, ICT Express, 2015).

  • Flying relay antenna requirements for connectivity to current LTE infrastructure
  • Performance evaluation of cellular networks featuring flying relays

 


scenario_flying_relay

Flying relay concept (EuCAP 2016)

uav_antenna_requirement_H=500m

The required UAV antenna gain towards the BS as the UAV flies along a x-y plane at 0.Km above ground level. The BS is located at the axes origin (0,0) and it is equipped with the Kathrein 742215 LTE antenna. The rate requirement is 10 Mbps and 10MHz is the system bandwidth. (EuCAP 2016)

fig2

End-to-end average SEP of QPSK versus total SNR for a dual-hop system with MRC and least-squares estimation.

DVB-SH hybrid broadcasting system

DVB-SH hybrid broadcasting system

Code-combining concept in DVB-SH mobile terminal

Key Publications

  • G.V.Tsoulos and G.E.Athanasiadou, ‘On the application of adaptive antennas to microcellular environments: Radio channel characteristics and system performance’, IEEE Transactions on Vehicular Technology, January 2002, vol. 51, no 1, pp. 1-16.
  • D.Zarbouti, D.Tsilimantos, G.V.Tsoulos, G.Athanasiadou, and D.Kaklamani,”Performance of OFDMA multicell systems with Opportunistic Beamforming”, Wireless Personal Communications, Springer, 2011.doi: 10.1007/s11277-011-0315-6
  • Stiakogiannakis, I.N.; Athanasiadou, G.E.; Tsoulos, G.V.; Kaklamani, D.I., “Performance Analysis of Fractional Frequency Reuse for Multi-Cell WiMAX Networks Based on Site-Specific Propagation Modeling [Wireless Corner],” Antennas and Propagation Magazine, IEEE , vol.54, no.1, pp.214,226, Feb. 2012 doi: 10.1109/MAP.2012.6202554
  • D.Tsilimantos, D.Zarbouti, G.V.Tsoulos, G.Athanasiadou, and D.Kaklamani, “Fairness and throughput trade-off analysis for UMTS WCDMA network planning”, Springer Wireless Personal Communications Journal, vol. 56, no. 4, pp. 693-714, Oct. 2009. doi: 10.1007/s11277-009-9840-y
  • P.K.Gkonis, T.E.Athanaileas, G.V.Tsoulos, G.E.Athanasiadou, and D.I.Kaklamani, “Adaptive Beam-Centric Admission Control for WCDMA Multicell/Multiservice Scenarios with Non-Uniform Traffic”, Springer Wireless Personal Communications Journal, vol. 58, no. 2, pp. 369-389, Dec. 2009.