Table 1 Definitions of a subset of commonly used symbols
From: Toward UAV-based communication: improving throughput by optimum trajectory and power allocation
Symbol | Meaning |
|---|---|
T | Flying time |
N | Number of time slots |
V | Maximum speed of UAV |
\(P_A[n]\) | Transmission power of A |
X[n] | The transmitted signal to UAV |
\(Z_1 [n]\) | The noise observed at UAV |
\(h_{AU} [n]\) | Channel between UAV and A |
\(d_{AU} [n]\) | Distance between A and UAV |
\(\alpha _0\) | Reference channel power at the distance \(d_0=1\)m |
G[n] | Scaling parameter |
\(P_U [n]\) | Transmission power of UAV |
\(h_{UB} [n]\) | Channel between UAV and B |
\(Z_2 [n]\) | The noise observed at B |
\(d_{UB}\) | Distance between UAV and B |
\({\overline{P_A}}\) | Average maximum transmission power of A |
\({\overline{P_U}}\) | Average maximum transmission power of UAV |
\(\sigma ^2\) | Power of the noise |