Title :
On Channel Estimation and Capacity for Amplify and Forward Relay Networks
Author :
Behbahani, Alireza S. ; Eltawil, Ahmed
Author_Institution :
EECS Dept., Univ. of California, Irvine, CA
Abstract :
Relay networks have received considerable attention recently, especially when limited size and power resources impose constraints on the number of antennas within a wireless sensor network. In this paper, we design and analyze a training based linear mean square error (LMMSE) channel estimator for time division multiplex amplify-and-forward (AF) relay networks. For the purpose of performance comparison we consider three distinct cases; In the first scenario, each relay estimates its backward and forward channels, in the second scenario each relay knows its backward and forward channels perfectly and finally in the third scenario relays have no knowledge of channels. Finally, we find a lower bound for the capacity considering the effect of training and estimation error.
Keywords :
antennas; channel capacity; channel estimation; mean square error methods; radio networks; time division multiplexing; wireless sensor networks; antennas; backward channels; channel capacity; channel estimation; forward channels; linear mean square error channel estimator; time division multiplex amplify-and-forward relay networks; wireless sensor network; Channel capacity; Channel estimation; Estimation error; Mean square error methods; Next generation networking; Receiving antennas; Relays; Transmitters; Transmitting antennas; Wireless sensor networks;
Conference_Titel :
Global Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE
Conference_Location :
New Orleans, LO
Print_ISBN :
978-1-4244-2324-8
DOI :
10.1109/GLOCOM.2008.ECP.708
