TY - GEN
T1 - Entropy-maximization based adaptive frequency hopping for wireless medical telemetry systems
AU - Park, Kyung Joon
AU - Park, Tae Rim
AU - Schmitz, Christopher D.
AU - Sha, Lui
N1 - Publisher Copyright:
Copyright 2009 ACM.
PY - 2009/5/18
Y1 - 2009/5/18
N2 - In this paper, we propose an adaptive frequency hopping algorithm, entitled robust adaptive frequency hopping (RAFH), for increased reliability of wireless medical telemetry system (WMTS) under coexistence environment with non-medical devices. The conventional adaptive frequency hopping (AFH) scheme classifies channels into "good" or "bad" according to the threshold-based on-off decision, and uses good channels with a uniform hop probability. Unlike the conventional AFH scheme, RAFH solves a constrained entropy maximization problem and assigns each channel a different hop probability, which is a decreasing function of the measured PER. By adopting constrained entropy maximization, RAFH not only improves the average PER, but also reduces the PER fluctuation under dynamic interference environment. Our simulation studies show that RAFH outperforms the basic FH and the conventional AFH with respect to the PER under various scenarios of dynamic interference.
AB - In this paper, we propose an adaptive frequency hopping algorithm, entitled robust adaptive frequency hopping (RAFH), for increased reliability of wireless medical telemetry system (WMTS) under coexistence environment with non-medical devices. The conventional adaptive frequency hopping (AFH) scheme classifies channels into "good" or "bad" according to the threshold-based on-off decision, and uses good channels with a uniform hop probability. Unlike the conventional AFH scheme, RAFH solves a constrained entropy maximization problem and assigns each channel a different hop probability, which is a decreasing function of the measured PER. By adopting constrained entropy maximization, RAFH not only improves the average PER, but also reduces the PER fluctuation under dynamic interference environment. Our simulation studies show that RAFH outperforms the basic FH and the conventional AFH with respect to the PER under various scenarios of dynamic interference.
KW - Entropy maximization
KW - Frequency hopping spread spectrum
KW - Wireless coexistence
KW - Wireless medical telemetry system
UR - http://www.scopus.com/inward/record.url?scp=84894198716&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84894198716&partnerID=8YFLogxK
U2 - 10.1145/1540373.1540378
DO - 10.1145/1540373.1540378
M3 - Conference contribution
AN - SCOPUS:84894198716
T3 - WiMD 2009 - Proceedings of the 1st ACM International Workshop on Medical-Grade Wireless Networks, co-located with MobiHoc 2009
SP - 15
EP - 20
BT - WiMD 2009 - Proceedings of the 1st ACM International Workshop on Medical-Grade Wireless Networks, co-located with MobiHoc 2009
PB - Association for Computing Machinery
T2 - 1st ACM International Workshop on Medical-Grade Wireless Networks, WiMD 2009
Y2 - 18 May 2009
ER -