Research Article
Measurement Stand and Methodology for Research of the Off-Body and Body-to-Body Radio Channels in WBANs with Different Diversity Schemes
Table 1
Evaluation of the standard uncertainty and expanded uncertainty for 95% confidence interval (
).
| Object of measurement | | Factor | | Pessimistic case | Optimistic case | (dB) | (dB) | (dB) | (dB) | (dB) | (dB) |
| System loss | 1 | VSG | | 0.9 | 2.0 | ±4.0 | 0.9 | 1.5 | ±3.0 | 2 | Tx cable | 0.2 | 0.2 | 3 | Tx antenna | 1.6 | — | 4 | RF switch | 0.3 | — | 5 | Rx antenna | 1.6 | — | 6 | Rx cable | 0.2 | 0.2 | 7 | Receiver | 1.5 | 1.5 | 8 | Methodology imperfection | 1.0 | 1.0 | 9 | Human factor | 1.5 | 1.5 |
| Channel impulse response | 1 | VNA | | 0.5 | 1.7 | ±3.4 | 0.5 | 1.1 | ±2.2 | 2 | Tx cable | 0.2 | 0.2 | 3 | Tx antenna | 1.6 | — | 4 | RF switch | 0.3 | — | 5 | Rx antenna | 1.6 | — | 6 | Rx cable | 0.2 | 0.2 | 7 | Methodology imperfection | 1.0 | 1.0 | 8 | Human factor | 1.5 | 1.5 |
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