RMS delay and coherence bandwidth measurements in indoor radio channels inthe UHF band

A study of time dispersion in different indoor line-of-sight radio channels in the 492-862 MHz band is presented in this paper. A combined method to f ilter the noise in the measured impulse response is described. The effect o f frequency windowing on the impulse responses and the root mean square (rm s) delay spread is also investigated. It has been found that, in general, t he use of windows with lower side-lobe levels yields larger values of the r ms delay spread. The relation between the mean delay and the rms delay spre ad has also been studied for copolar and crosspolar channels. The dependenc e of the coherence bandwidth on the rms delay spread has been considered, a nd an inverse relation has been tested for both components.