|
Title:
|
The Capacity of Average and Peak Power Constrained Fading Channels with Channel Side Information |
|
Author:
|
Khojastepour, Mohammad; Aazhang, Behnaam
|
|
Type:
|
Conference Paper |
|
Keywords:
|
capacity; fading channl; peak power; average power |
|
Citation:
|
M. Khojastepour and B. Aazhang,"The Capacity of Average and Peak Power Constrained Fading Channels with Channel Side Information," in IEEE Wireless Communications and Networking Conference, |
|
Abstract:
|
We derive the ergodic capacity of discrete-time
fading channel with additive Gaussian noise subject to both
peak and average power constraint. The average power can be
interpreted as the cost that we incur to achieve a certain rate.
On the other hand, the motivation of this analysis comes from
the fact that there is also a peak power limitation in practical
communication system. It is been shown that the optimal power
adaption is no longer water-filling or constant power adaption
which is the case where there is no limitation on the peak power.
The numerical results show that the importance of peak power
constraint become negligible for relatively low available average
power, while it is limiting the capacity to be finite even as available
average power goes to infinity. |
|
Date Published:
|
2004-03-01 |
