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In cellular communication systems where non-line-of-sight (NLOS) channels are dominant as compared to line-of-sight (LOS) channels, a time difference of arrival (TDOA) localization method can outperform a time of arrival (TOA) localization method, although the TDOA method loses one degree of freedom in the number of usable range estimates when selecting a range estimate as the reference and doubles...
One of promising transmission technologies in wireless body area networks (BANs) is ultra wideband-impulse radio (UWB-IR) transmission, which can provide high data rate for real-time transmission, and extremely low power consumption for increasing device longevity. Moreover, energy detection scheme in UWB-IR transmission is advantageous in terms of simple implementation. On the other hand, UWB-IR...
In a computer simulation result on the location estimation for a cellular system, we found that a Time Difference Of Arrival (TDOA) method outperforms a Time Of Arrival (TOA) method when Non-Line-Of-Sight (NLOS) channels are dominant, whereas the TOA method outperforms the TDOA method when LOS channels are dominant. We could not easily accept the result, because TDOA method loses one degree of freedom...
This paper compares the indoor tracking performance for a moving target between an IIR (Infinite Impulse Response) low pass filter and a particle filter. It reveals that, in the computer simulations where the motion of a target exactly follows the state transition model in the particle filter, the particle filter-based tracking system outperforms the IIR low pass filter-based tracking system. On the...
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