Relationship between Bandwidth and Received Power
The impulse response of a multipath channel is measured in the field using channel sounding techniques.
Consider two extreme channel sounding cases.
Consider a pulsed, transmitted RF signal of the Form
Where p(t) is repetitive baseband pulse train (see figure 11.2)
T bbnarrow pulse widthτ maxmaximum measured excess delay
The low pass channel output is given as
The Received Power at time t0 is
If the transmitted signal is able to resolve the multipath ,then average small scale receiver power is simply sum of average power received from each multipath components.