TY - JOUR
T1 - Doppler Spectrum from Moving Scatterers in a Random Environment
AU - Andersen, Jørgen Bach
AU - Nielsen, Jesper Ødum
AU - Pedersen, Gert Frølund
AU - Bauch, Gerhard
AU - Dietl, Guido
PY - 2009
Y1 - 2009
N2 - A random non-line-of-sight environment with stationary transmitter and receiver is considered. In such an environment movement of a scatterer will lead to perturbations of the otherwise static channel with a resulting Doppler spectrum. This is quite a general situation in outdoor environments with moving traffic or indoor situations with moving people. Here we study the latter situation in detail with experimental results from a large office environment. A general theory of Doppler spectra is developed. The impact of a scatterer depends on the angular distribution of scattered energy, and uniform as well as sharply peaked distributions are considered in the theory. The Doppler spectra are in all cases sharply peaked at zero frequency due to forward scattering, but the actually measured distribution depends on the degree and type of activity in the environment, as well as the spectrum estimation accuracy.
AB - A random non-line-of-sight environment with stationary transmitter and receiver is considered. In such an environment movement of a scatterer will lead to perturbations of the otherwise static channel with a resulting Doppler spectrum. This is quite a general situation in outdoor environments with moving traffic or indoor situations with moving people. Here we study the latter situation in detail with experimental results from a large office environment. A general theory of Doppler spectra is developed. The impact of a scatterer depends on the angular distribution of scattered energy, and uniform as well as sharply peaked distributions are considered in the theory. The Doppler spectra are in all cases sharply peaked at zero frequency due to forward scattering, but the actually measured distribution depends on the degree and type of activity in the environment, as well as the spectrum estimation accuracy.
KW - indoor propagation
KW - small terminal antennas
KW - radio channel
KW - user influence
U2 - 10.1109/TWC.2009.081088
DO - 10.1109/TWC.2009.081088
M3 - Journal article
SN - 1536-1276
VL - 8
SP - 3270
EP - 3277
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 6
ER -