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 measurementFactorPessimistic caseOptimistic case
(dB) (dB) (dB) (dB) (dB) (dB)

System loss1VSG0.92.0±4.00.91.5±3.0
2Tx cable0.20.2
3Tx antenna1.6
4RF switch0.3
5Rx antenna1.6
6Rx cable0.20.2
7Receiver1.51.5
8Methodology imperfection1.01.0
9Human factor1.51.5

Channel impulse response1VNA0.51.7±3.40.51.1±2.2
2Tx cable0.20.2
3Tx antenna1.6
4RF switch0.3
5Rx antenna1.6
6Rx cable0.20.2
7Methodology imperfection1.01.0
8Human factor1.51.5