Name
Abstract | ||
|---|---|---|
The challenge of resource allocation which consists of both power and sub channel allocations on the downlink OFDMA system is studied in this paper. Shen et al proposed a power allocation method that is dependent of Lagrange multipliers but a complicated root finding method is involved [1]. To avoid complicated calculation in root finding, we develop new expressions for optimal power with three power initialization schemes for all users and sub-channels. The other merit of these new expressions is that all Lagrange multipliers can be obtained directly without using a sub gradient method and hence optimal power can be rapidly obtained. Computed results show that the proposed method consistently yields higher sum capacity as compared to [1] but there is a minor degradation of proportional fairness. This situation involves a trade-off between system capacity and proportional fairness. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/CIT.2014.42 | CIT |
Keywords | Field | DocType |
trade-off between system capacity,sub channel allocations,lagrange multipliers,ofdm modulation,proportional fairness,lagrange method,resource allocation,power allocations,channel allocation,frequency division multiple access,channel capacity,ofdma, resource allocation, proportional fairness, lagrange method,ofdma systems,ofdma | Gradient method,Max-min fairness,Mathematical optimization,Computer science,Lagrange multiplier,Real-time computing,Root-finding algorithm,Resource allocation,Fairness measure,Initialization,Channel allocation schemes | Conference |
ISSN | Citations | PageRank |
2474-9648 | 0 | 0.34 |
References | Authors | |
0 | 4 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Su Fong Chien | 1 | 34 | 7.71 |
| Ka Kien Lo | 2 | 1 | 1.36 |
| Kae Hsiang Kwong | 3 | 39 | 10.64 |
| Heng-Siong Lim | 4 | 45 | 9.65 |