[1] Univ Lisbon, Fac Ciencias, Inst Dom Luiz, Lisbon, Portugal
[2] Inst Portugues Mar & Atmosfera, Lisbon, Portugal
[3] Phys Informat & Quantum Technol Grp, Inst Telecomunicacoes, Lisbon, Portugal
[4] Inst Super Engn Lisboa, Lisbon, Portugal
[5] Autoridade Nacl Comunicacoes, Lisbon, Portugal
[6] Univ Lisbon, Inst Super Tecn, Lisbon, Portugal