DocumentCode :
1486925
Title :
Rate and Power Adaptation for Analog Network Coding
Author :
Wang, Shiqiang ; Song, Qingyang ; Wang, Xingwei ; Jamalipour, Abbas
Author_Institution :
Med. Imaging Comput. Key Lab., Northeastern Univ., Shenyang, China
Volume :
60
Issue :
5
fYear :
2011
fDate :
6/1/2011 12:00:00 AM
Firstpage :
2302
Lastpage :
2313
Abstract :
Network coding is an emerging technique of packet forwarding that encodes the packets at the relay node to increase the throughput of a relaying network. Analog network coding (ANC) encodes the packets by superposing the signals at the physical layer, which can further bring throughput improvements. In this paper, we first analyze the coding procedure of ANC and elaborate the fact that the maximum possible number of coding nodes in ANC is two for common wireless transceivers. Then, we propose a rate adaptation scheme for ANC. We show that the transmission powers of nodes affect the data rate and that transmitting at the maximum power is not always optimal. Based on this observation, we propose a method of finding the optimal transmission power that maximizes the data rate. We also discuss some issues that need to be considered when implementing the proposed scheme in practical wireless systems. Then, the performance of the proposed scheme is evaluated through extensive simulations. The simulation results show that the proposed joint rate and power adaptation scheme outperforms ANC without power adaptation and that it is beneficial over other relaying schemes in a broad range of scenarios of mobile and vehicular applications.
Keywords :
network coding; radio networks; radio transceivers; analog network coding; coding nodes; common wireless transceivers; data rate; mobile applications; optimal transmission power; packet forwarding; power adaptation; rate adaptation; rate adaptation scheme; relaying network; vehicular applications; wireless systems; Encoding; Network coding; Physical layer; Relays; Signal to noise ratio; Synchronization; Wireless networks; Analog network coding (ANC); communication; physical-layer network coding; rate and power adaptation; wireless networks;
fLanguage :
English
Journal_Title :
Vehicular Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9545
Type :
jour
DOI :
10.1109/TVT.2011.2135869
Filename :
5741761
Link To Document :
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