DocumentCode :
2807503
Title :
Optimal spectrum sharing and power allocation for OFDM-based two-way relaying
Author :
Dong, Min ; ShahbazPanahi, Shahram
Author_Institution :
Fac. of Eng. & Appl. Sci., Univ. of Ontario Inst. of Technol., Oshawa, ON, Canada
fYear :
2010
fDate :
14-19 March 2010
Firstpage :
3310
Lastpage :
3313
Abstract :
The problem of optimally allocating power for half-duplex two-way relaying in an OFDM system is considered. Assuming two-way relay is performed using analog network coding, and with total network power constraint, we obtain the optimal power allocation across subcarriers and among a relay and two communicating nodes to maximize the achievable sum rate in the network. We show that the resulting solution is a combination of two (usually opposite) power allocation strategies, i.e., water-filling across subcarriers and SNR-balancing between communicating end nodes. Further analysis also shows the optimal power allocation on the relay itself is a water-filling solution.
Keywords :
OFDM modulation; channel allocation; network coding; radio repeaters; OFDM; analog network coding; half-duplex two-way relaying; optimal spectrum sharing; power allocation; sum rate maximization; water-filling solution; Bandwidth; Intersymbol interference; Network coding; OFDM; Power engineering and energy; Power system relaying; Relays; Signal generators; Signal processing; Time frequency analysis; OFDM; Power allocation; SNR-balancing; Sum rate; Two-way relaying; Water-filling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics Speech and Signal Processing (ICASSP), 2010 IEEE International Conference on
Conference_Location :
Dallas, TX
ISSN :
1520-6149
Print_ISBN :
978-1-4244-4295-9
Electronic_ISBN :
1520-6149
Type :
conf
DOI :
10.1109/ICASSP.2010.5496019
Filename :
5496019
Link To Document :
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