Centralized and distributed resource allocation in OFDM based multi-relay system
In the presence of multiple non-regenerative relays, we derived optimal joint power allocation, relay selection, and subchannel pairing schemes in orthogonal frequency division multiplexing （OFDM） based wireless networks. The Lagrange dual method was employed to design the optimal algorithm. First,...
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| Veröffentlicht in: | Frontiers of information technology & electronic engineering 2010-06, Vol.11 (6), p.450-464 |
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| creator | Yin, Rui Zhang, Yu Yu, Guan-ding Zhang, Zhao-yang Zhang, Jie-tao |
| description | In the presence of multiple non-regenerative relays, we derived optimal joint power allocation, relay selection, and subchannel pairing schemes in orthogonal frequency division multiplexing （OFDM） based wireless networks. The Lagrange dual method was employed to design the optimal algorithm. First, the optimization problem was formulated for the single-relay system and the optimal centralized algorithm was presented by resolving the dual problem. Next, the optimal algorithm for a multi-relay system was proposed in a similar way. Compared with the exhaustive search method, the computational complexity of the proposed optimal algorithms was reduced from non-polynomial to polynomial time. Finally, the centralized algorithm was extended to the distributed algorithm, which was more feasible for the practical system. Simulation results verify our analysis. |
| doi_str_mv | 10.1631/jzus.C0910405 |
| format | Article |
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The Lagrange dual method was employed to design the optimal algorithm. First, the optimization problem was formulated for the single-relay system and the optimal centralized algorithm was presented by resolving the dual problem. Next, the optimal algorithm for a multi-relay system was proposed in a similar way. Compared with the exhaustive search method, the computational complexity of the proposed optimal algorithms was reduced from non-polynomial to polynomial time. Finally, the centralized algorithm was extended to the distributed algorithm, which was more feasible for the practical system. 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Zhejiang Univ. - Sci. C</addtitle><addtitle>Journal of zhejiang university science</addtitle><description>In the presence of multiple non-regenerative relays, we derived optimal joint power allocation, relay selection, and subchannel pairing schemes in orthogonal frequency division multiplexing （OFDM） based wireless networks. The Lagrange dual method was employed to design the optimal algorithm. First, the optimization problem was formulated for the single-relay system and the optimal centralized algorithm was presented by resolving the dual problem. Next, the optimal algorithm for a multi-relay system was proposed in a similar way. Compared with the exhaustive search method, the computational complexity of the proposed optimal algorithms was reduced from non-polynomial to polynomial time. Finally, the centralized algorithm was extended to the distributed algorithm, which was more feasible for the practical system. Simulation results verify our analysis.</description><subject>Algorithms</subject><subject>Communications Engineering</subject><subject>Computer Hardware</subject><subject>Computer Science</subject><subject>Computer Systems Organization and Communication Networks</subject><subject>Design optimization</subject><subject>Electrical Engineering</subject><subject>Electronics and Microelectronics</subject><subject>Instrumentation</subject><subject>Networks</subject><subject>Orthogonal Frequency Division Multiplexing</subject><subject>Polynomials</subject><subject>Relay systems</subject><subject>Resource allocation</subject><subject>Wireless networks</subject><issn>1869-1951</issn><issn>2095-9184</issn><issn>1869-196X</issn><issn>2095-9230</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp1kL1PwzAQxS0EElXpyB7BnGLHsWOPqFBAKioDSGzWxbWLS5q0tjO0fz2uysfELXcn_d6900PokuAx4ZTcrPZ9GE-wJLjE7AQNiOAyJ5K_n_7OjJyjUQgrnIoyJjkdoJeJaaOHxu3NIoN2kS1ciN7VfUy7N6HrvTYZNE2nIbquzVybzad3z1kNIRHrvoku96aBXRZ2IZr1BTqz0AQz-u5D9Da9f5085rP5w9PkdpZrSknMZSVKBhygZAVllOmiZjWtsSkZlTXFQmtelVZbC9SaAioutDSVqKxlBBijQ3R9vLvx3bY3IapV-rVNlqqQRFRFwWmZqPxIad-F4I1VG-_W4HeKYHXITR1yUz-5JX585EPi2qXxf1f_E1x9G3x07XKbNKoG_WldYxQtMRdSVPQLEiV77w</recordid><startdate>20100601</startdate><enddate>20100601</enddate><creator>Yin, Rui</creator><creator>Zhang, Yu</creator><creator>Yu, Guan-ding</creator><creator>Zhang, Zhao-yang</creator><creator>Zhang, Jie-tao</creator><general>SP Zhejiang University Press</general><general>Springer Nature B.V</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JQ2</scope><scope>K7-</scope><scope>L6V</scope><scope>M7S</scope><scope>P5Z</scope><scope>P62</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope></search><sort><creationdate>20100601</creationdate><title>Centralized and distributed resource allocation in OFDM based multi-relay system</title><author>Yin, Rui ; 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Zhejiang Univ. - Sci. C</stitle><addtitle>Journal of zhejiang university science</addtitle><date>2010-06-01</date><risdate>2010</risdate><volume>11</volume><issue>6</issue><spage>450</spage><epage>464</epage><pages>450-464</pages><issn>1869-1951</issn><issn>2095-9184</issn><eissn>1869-196X</eissn><eissn>2095-9230</eissn><abstract>In the presence of multiple non-regenerative relays, we derived optimal joint power allocation, relay selection, and subchannel pairing schemes in orthogonal frequency division multiplexing （OFDM） based wireless networks. The Lagrange dual method was employed to design the optimal algorithm. First, the optimization problem was formulated for the single-relay system and the optimal centralized algorithm was presented by resolving the dual problem. Next, the optimal algorithm for a multi-relay system was proposed in a similar way. 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| subjects | Algorithms Communications Engineering Computer Hardware Computer Science Computer Systems Organization and Communication Networks Design optimization Electrical Engineering Electronics and Microelectronics Instrumentation Networks Orthogonal Frequency Division Multiplexing Polynomials Relay systems Resource allocation Wireless networks |
| title | Centralized and distributed resource allocation in OFDM based multi-relay system |
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