TY - CHAP
T1 - Spatial diversity for off-body communications in an indoor populated environment at 5.8 GHz
AU - Ali, Ameenulla J.
AU - Cotton, Simon L.
AU - Scanlon, William G.
PY - 2009/12/8
Y1 - 2009/12/8
N2 - Human activity in the vicinity of body-centric wireless communications systems often affects received signal characteristics. In particular, pedestrian movements may induce temporal fading and cause shadowing events in situations where an individual or group obstructs the dominant signal path. In this paper, we report results from a series of carefully controlled experiments aimed at assessing the impact of using multipleantenna techniques to reduce the influence of pedestrian effects on off-body radio-links. Using two co-located, spatially-separated bodyworn antennas mounted on the anterior human torso, it was found that the cross-correlation coefficient value between branches was always less than 0.7, irrespective of the number of nearby pedestrians. The difference in mean signal level between receiver branches generally decreased as pedestrian numbers increased. Post-detection selection combining of the measurement data has shown that diversity gain improves with increased human traffic in the local environment.
AB - Human activity in the vicinity of body-centric wireless communications systems often affects received signal characteristics. In particular, pedestrian movements may induce temporal fading and cause shadowing events in situations where an individual or group obstructs the dominant signal path. In this paper, we report results from a series of carefully controlled experiments aimed at assessing the impact of using multipleantenna techniques to reduce the influence of pedestrian effects on off-body radio-links. Using two co-located, spatially-separated bodyworn antennas mounted on the anterior human torso, it was found that the cross-correlation coefficient value between branches was always less than 0.7, irrespective of the number of nearby pedestrians. The difference in mean signal level between receiver branches generally decreased as pedestrian numbers increased. Post-detection selection combining of the measurement data has shown that diversity gain improves with increased human traffic in the local environment.
UR - https://www.scopus.com/pages/publications/76149091876
U2 - 10.1109/LAPC.2009.5352532
DO - 10.1109/LAPC.2009.5352532
M3 - Chapter
AN - SCOPUS:76149091876
SN - 9781424427208
T3 - Loughborough Antennas and Propagation Conference, LAPC 2009 - Conference Proceedings
SP - 641
EP - 644
BT - Loughborough Antennas and Propagation Conference, LAPC 2009 - Conference Proceedings
T2 - Loughborough Antennas and Propagation Conference, LAPC 2009
Y2 - 16 November 2009 through 17 November 2009
ER -