TY - JOUR
T1 - Conditions and performance of ideal RAKE reception for ultra-wideband signals in lognormal fading channels
AU - Zhang, J.
AU - Kennedy, Rod A.
AU - Abhayapala, Thushara D.
PY - 2003/10
Y1 - 2003/10
N2 - In this paper, the conditions and performance of ideal RAKE reception for time hopping Ultra-Wideband (UWB) investigated. Owing to the complex propagation phenomena and specific-structure of UWB signals, new problems relevant to the operation of RAKE receivers arise. This motivates us to reconsider the conditions under which a RAKE receiver can work effectively with negligible interference between fingers. Key findings are that the conditions not only relate to the property of time hopping codes, but also modulation methods. An analytical technique is introduced to derive explicit expressions of RAKE performance for various combining methods for a lognormal fading channel. Numerical results show that RAKE reception can largely improve the performance, and equal gain combining has comparable performance to maximum ratio combining.
AB - In this paper, the conditions and performance of ideal RAKE reception for time hopping Ultra-Wideband (UWB) investigated. Owing to the complex propagation phenomena and specific-structure of UWB signals, new problems relevant to the operation of RAKE receivers arise. This motivates us to reconsider the conditions under which a RAKE receiver can work effectively with negligible interference between fingers. Key findings are that the conditions not only relate to the property of time hopping codes, but also modulation methods. An analytical technique is introduced to derive explicit expressions of RAKE performance for various combining methods for a lognormal fading channel. Numerical results show that RAKE reception can largely improve the performance, and equal gain combining has comparable performance to maximum ratio combining.
KW - Lognormal distribution
KW - RAKE receiver
KW - Ultra-wideband
UR - http://www.scopus.com/inward/record.url?scp=3543062990&partnerID=8YFLogxK
U2 - 10.1023/B:IJWI.0000022050.22706.c4
DO - 10.1023/B:IJWI.0000022050.22706.c4
M3 - Article
SN - 1068-9605
VL - 10
SP - 193
EP - 200
JO - International Journal of Wireless Information Networks
JF - International Journal of Wireless Information Networks
IS - 4
ER -