Abstract
In this paper, we investigate the potential improvement in signal reliability for indoor off-body communications when using spatial diversity at the base station. In particular, we utilize two hypothetical indoor base stations operating at 5.8 GHz each featuring four antennas which are spaced at either half- or one-wavelength apart. Three on-body locations are considered along with four types of user movement. The cross-correlation between the received signal envelopes observed at each base station antenna element was calculated and found to be always less than 0.5. Selection, maximal ratio, and equal gain combining of the received signal has shown that the greatest improvement is obtained when the user is mobile, with a maximum diversity gain of 11.34 dB achievable when using a four branch receiver. To model the fading envelope obtained at the output of the virtual combiners, we use diversity specific, theoretical probability density functions for multi-branch receivers operating in Nakagami-m fading channels. It is shown that these equations provide an excellent fit to the measured channel data.
| Original language | English |
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| Title of host publication | The 8th European Conference on Antennas and Propagation (EuCAP 2014) |
| Publisher | IEEE |
| Pages | 992-996 |
| Number of pages | 5 |
| ISBN (Electronic) | 9788890701849 |
| DOIs | |
| Publication status | Published - 18 Sept 2014 |
| Externally published | Yes |
| Event | 8th European Conference on Antennas and Propagation - , Netherlands Duration: 6 Apr 2014 → 11 Apr 2014 |
Conference
| Conference | 8th European Conference on Antennas and Propagation |
|---|---|
| Abbreviated title | EuCAP 2014 |
| Country/Territory | Netherlands |
| Period | 6/04/14 → 11/04/14 |