Adaptive optimal transmit power allocation for two-hop non-regenerative wireless relaying system

Author

Jingmei, Zhang ; Qi, Zhang ; Chunju, Shao ; Ying, Wang ; Ping, Zhang ; Zhang, Zhang

Author_Institution

Wireless Technol. Innovation Labs., Beijing Univ. of Posts & Telecommun., China

Volume

2

fYear

2004

fDate

17-19 May 2004

Firstpage

1213

Abstract

In order to combat fading in wireless networks and increase the capacity of a system, cooperation is allowed among the terminals in a network. The adaptive optimal power allocation (PA) scheme, based on a certain system performance, is an important issue for relaying routing and network operation. The paper analyzes the two-hop non-regenerative (NR) relaying channel with and without diversity, and investigates the optimal PA scheme between the source terminal (Tx) and the relaying terminal (RS) under power constraints. Since, in real relaying environments, the transmitter usually knows the instantaneous channel state information (ICSI) of the 1st hop and the statistical channel state information (SCSI) of the 2nd hop, the proposed PA schemes are based on two-hop ICSI and two-hop mixed channel state information (MCSI) respectively. With the adaptive scheme, the system performance not only outperforms that of the direct transmission system, but also obtains the maximum channel capacity or SNR of the relaying system.

Keywords

channel capacity; diversity reception; fading channels; mobile radio; radio networks; radio repeaters; resource allocation; telecommunication network routing; CSI; SNR; adaptive transmit power allocation; channel capacity; cooperative relaying; diversity; instantaneous channel state information; mixed channel state information; mobile terminals; relaying terminal; routing; source terminal; statistical channel state information; two-hop nonregenerative wireless relaying system; two-hop wireless relaying system; Adaptive systems; Channel capacity; Channel state information; Fading; Power system relaying; Relays; Routing; System performance; Transmitters; Wireless networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th

ISSN

1550-2252

Print_ISBN

0-7803-8255-2

Type

conf

DOI

10.1109/VETECS.2004.1389025

Filename

1389025