Project deliverable Open Access

D4.1: Initial results on adaptive directional LOS and NLOS reliable connectivity

Di Renzo, Marco; Aravanis, Alexis; Qian, Xuewen; Hrasnica, Halid; Ntontin, Konstantinos; Katzouris, Nikos; Manganaris, Kyriakos; Lazarakis, Fotis; Alexiou, Angeliki; Boulogeorgos, Alexandros‐Apostolos A.; Kokkoniemi, Joonas; He, Jiguang; Yaqub, Edwin; Desai, Rachana; Halmetoja, Heikki; Sanguanpuak, Tachporn

The  present  deliverable  summarizes  the  initial  results  on  the  development  of  tailored techniques  for  the  adaptive  directional  LOS  and  NLOS  reliable  connectivity  in  RIS‐assisted communication systems that operate in high frequency bands, i.e., above 100 GHz. The RIS‐assisted systems are conducive, if not necessary, for the compensation of the attenuation in high  frequency  bands  that  are  highly  susceptible  to  blockages.  In  this  course,  the  present deliverable  focuses on  the challenges arising by  the dynamic movement of users or access points in the flexible environment shaped by the presence of RISs and D‐band systems and the challenges pertaining to the blockages of the D‐band links. In particular, it focuses on the employment  of  adaptive  (stochastic  and  machine  learning)  tools  for  the  development  of appropriate physical layer approaches and of medium access protocols that can support, for instance, in the presence of blockages, highly focused beams and /or beamforming protocols for the two links between the transmitter / receiver and the RIS.

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