Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multipath interference analysis of IR-UWB systems in indoor office LOS
  environment   Bit error rate (BER) performance of impulse radio Ultra-Wideband (UWB)
systems in the presence of intrasymbol interference, inter-symbol interference,
multiuser interference and addictive white Gaussian noise (AWGN) is presented
in this paper. By analyzing the indoor office LOS channel model defined by IEEE
802.15.4a Task Group and deducing the variance for intra-symbol interference
(IASI), inter-symbol interference (ISI) and multiuser interference (MUI), the
system BER expression is obtained and verified by MATLAB simulations. Through
comparing the simulation results with and without intra-symbol interference,
the conclusion that intra-symbol interference cannot be neglected is
drawn-moreover, such interference will significantly decrease performance of
UWB based wireless sensor networks (WSN). Then, the BER performance of UWB
systems in multiuser environment is also analyzed and analysis results show
that multiuser interference will further worsen the transmission performance of
UWB systems.

30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg