Table 1.
Notations.
| Notation | Description | Notation | Description |
|---|---|---|---|
| E [·] | The expectation operator | sij | The RF signal voltage for the jth HAP |
| NH | The number of HAPs | Si | The signal power per transmitter antenna |
| Nr | The number of receiving antennas | α2 | The power of LOS component |
| γ | The SNR of receiver | γth | The threshold of SNR for sensor device |
| ‖·‖F | The Frobenius norm operator | HLOS | The channel matrix of shadowed LOS path |
| |·| | The determinant operator | HNLOS | The channel matrix of NLOS path |
| tr(·) | The trace operator | 2σ2 | The the power of NLOS component |