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Summary: Performance and Parameter Optimization of UWB
RAKE Reception with Interchip Interference
Jian Zhang, Rodney A. Kennedy, Thushara D. Abhayapala
National ICT Australia and
Department of Telecommunications Engineering, RSISE
The Australian National University, Canberra ACT 0200, Australia
Email: Andrew.Zhang@nicta.com.au
Abstract-- In this paper, performance and parameter optimiza-
tion of RAKE reception for time-hopping Ultra Wideband (TH-
UWB) systems is investigated when interchip interference (ICI) is
taken into consideration. For a TH-UWB system, ICI is closely
related to the relationship between the number of chips in a
frame (Nc), and the period of the TH code (Nf ). In a fixed data-
rate case, larger Nf implies higher transmitted symbol signal-to-
noise ratio (SNR) and larger ICI in RAKE fingers. So there is a
tradeoff between Nc and Nf to optimize the RAKE performance.
In this paper, two models are suggested to describe the ICI, and
this tradeoff is investigated in the single user case based on the
traditional Gaussian approximation method and other flexible
methods. Given the lack of explicit knowledge of the relationship
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