Frequency selective fading and frequency correlation analysis on indoor fading radio channels

This work presents the frequency selective fading and frequency correlation evaluation of several indoor environments; the analysis was made over measurements carried out with a sounder with a 300 MHz bandwidth. A description of the sounder used in the measurements, the sounder parameters and the sounded environments is given. The 300 MHz bandwidth of the sounder is divided in segments as small as 600 kHz to perform the evaluation of frequency selective fading. Plots are provided for a number of locations in four different environments. It is also shown how the variation of the signal level due to frequency selective fading is within certain limits regarding the adjacent frequency segments on the bandwidth. The coherence bandwidth at 0.5 correlation coefficient is calculated and a comparison with the RMS delay spread in each location is showed.