Low-Complexity Sub-band Divided Ray Tracing for UWB Indoor Channels
Paper i proceeding, 2014
Ray tracing has been extensively used to simulate
indoor channel characteristics. For an ultra-wideband system,
the channel characteristics vary significantly over the entire
bandwidth. To cope with this, sub-band divided RT has been
proposed by dividing the frequency of interest into multiple
subbands and superposing the RT results at the individual center
frequency of each subband. Thus, the computational complexity
is directly proportional to the number of subbands. In this paper,
we propose a mathematical method to significantly reduce the
computational complexity of the sub-band divided RT, making it
almost independent of the number of subbands. It is important to
note that, based on our approach, not only the determination of
the rays reaching a give location is made only once, but also the
electromagnetic calculation of the received signal is not needed
to perform repeatedly. The accuracy of low-complexity sub-
band divided RT algorithm is verified through a measurement
campaign.
ray tracing
indoor
channel modeling
ultra-wideband
low-complexity