Branch : Computer Science and Engineering
Subject : Wireless Communication
Relationship between Bandwidth and Received Power
Introduction:
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
Interpretation:
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.