Optical Fiber Communications: Our current experimental and theoretical research addresses optical code division multiple access (OCDMA) networks.
Signal Processing for CDMA Systems:We are investigating several topics on signal processing for code division based cellular systems. Research topics include: space-time beamforming and pre-equalization for DS-CDMA and MC-CDMA systems; multi-user detection for CDMA systems; channel estimation algorithms.
Radio Resource Management in MC-CDMA systems:We are investigating interface techniques between a packet based core network and the physical layer of MC-CDMA systems. This includes efficient mapping of data packets onto the radio resources and dynamic channel assignment techniques.
Infrared Wireless Communications: Infrared is a promising medium for short-range, indoor wireless communications, offering high bit rates and dense spatial reuse. Recent theoretical work has addressed trellis-coded for pulse postion modulation (PPM), amplitude and pulse position modulation (APPM) and overlapping PPM (OPPM).
VISEF
Main objective: investigate transmission possibilities of video over
UMTS
MATRICE
Main objective: investigate MC-CDMA based transmission techniques
for the broadband component of B3G systems.
WONET
Main objective: study transmission aspects and develop components for
OCDMA networks.
Rui Alves
PhD student. Thesis: trellis codes and modulation techniques for IR WLAN's.
Luís Gonçalves
PhD student. Thesis: frequency domain multiuser detectors for DS amd MC-CDMA
cellular systems.
António Morgado
PhD student. Thesis: Space-time pre-equalization for DS-CDMA cellular systems.
Paulo Marques
PhD student. Thesis: Channel estimation in mobile communications.
Adão Silva
PhD student. Thesis: Space-time coding and beamforming for MC-CDMA cellular
systems.
Filipe Alves
MSc Student. Thesis: Development of link level simulation platform for MC-CDMA
systems.