Patent ID: 11943022
Assignee: INTEL CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. The apparatus of claim 13, wherein:
a mm-wave channel for communication between the drone and the base station is given by hi[k]=Hi[k]wi, which is a NR×1 vector channel on sub-carrier k, and wi an optimal transmit beamformer wi∈NT×1,
a received signal in an ik-th sub-carrier of an m-th OFDM symbol of the OFDM symbols is given by:

ym[ik]=φmH(hi[ik]Xik+nm[ik]),k=0, . . . ,P−1

where φHm is one of the random beamformers and nm is noise,
the processing circuitry further configured to use a Kronecker product representation of a matrix equation vec(ABC)=(CT⊗A)B=vec(D) to rewrite the received signal in a measurement phase as:

y=((BΦ)T⊗X){tilde over (h)}+ñ

where:
y=vec(Y) is a (P M)×1 vector obtained from columns-wise stacking of sub-carriers Y,
{tilde over (h)}=vec({tilde over (H)}) is a (NrD)×1 vector obtained from columns-wise stacking of channel matrix {tilde over (H)}, and
ñ=vec(Z) is a (P M)×1 vector obtained from columns-wise stacking of noise matrix Z, and
perform an estimation of Nr×D elements of vectorized channel {tilde over (h)} using P×M number of received measurements contained in vectorized signal y, using a sparse signal estimation technique.