Papers by Keyword: Channel Characterization

Abstract: In this paper, frequency characterization of a UWB indoor MIMO channel is presented. Measurements were conducted on a 4×4 MIMO channel within the frequency range of 2 to 5 GHz with a fixed SNR of 30dB. The impact of antenna polarization on the mutual information was also analyzed with antennas interelement spacing fixed at 2λ. Channel capacity was analyzed both in NLOS and LOS scenarios. It is realized that the spectral efficiency of the channel is a function of the operating frequency and the channel bandwidth.

Abstract: In this paper, a 2x2 and a 4x4 indoor MIMO measurement campaign at a (2 -5) GHz is presented. A statistical analysis to study the effects of a 2x2 and a 4x4 MIMO on the channel capacity with their respective received fixed signal to noise ratios were analyzed both in the LOS and in NLOS scenarios. Furthermore, investigations were carried out on all the possible wide band antenna polarizations in order to ascertain which mode of propagation yields a highly decorrelated spatial channel. The three received signal to noise ratios namely 10dB, 20dB and 30dB were used to model various received signal powers. It was found that copolar configurations HH and VV yielded the maximum capacity values both in the LOS and in NLOS respectively. Finally, a validity test was conducted and it was realized that the empirical distribution is similar and within the theoretical (i.i.d) distribution.

Abstract: The power line communication (PLC) channel has been a transmission medium that enables to transfer high-speed digital data through the classical electrical wires. Channel characteristics of power lines are very important for communications systems design. In order to get the suitable model for power line communications analysis and improve the PLC communication quality, researchers do lots of study about the PLC channel characterizations based on actual measurement and theoretical analysis. This paper reviews the conclusions of recent studies, summaries the characteristics of PLC channel for medium voltage power lines and low voltage power lines. The further research is also put forward.