| Abstrakt: |
Channel sounding techniques are used to investigate and compare two micro-cellular environments: regular and chaflane street corners, at four different frequencies using a network analyzer. Parameters are extracted from the power delay profile, which is obtained as the inverse Fourier of the measured frequency response. It is shown that, for line of sight (LoS), delay spread (US) decreases 10 ns in regular corners and 5 ns in chaflane when frequency varies from 450 to 2400 MHz. For non line of sight (NLoS), RMS DS is around 60 ns in both environments. Frequency correlation is higher in chaflanes than in regular street corners and correlation decreases when the distance in frequency increases. Tapped delay line models are obtained at each frequency in each environment for LoS and NLoS. Finally, for LoS, the coherence bandwidth is bigger in chaflanes than in regular street corners, and it is also observed that it grows as frequency increases. However, for NLoS, the bandwidth remains steady around 4 MHz. [ABSTRACT FROM AUTHOR] |
