CAJ | 학술논문

针对配置于高空平台(HAPS)的OFDMA系统,研究了在平台功率受限情况下的资源分配问题.采用对偶理论,推导了在连续情况下,最小化发送功率时,OFDMA载波、功率、速率分配的最优解,同时利用统计近似法实现算法的实时配置.仿真结果表明,该算法性能与经典C.Y.Wong算法性能大致相同,而算法复杂度仅为线性复杂度,具有较强的实际应用价值.
침대배치우고공평태(HAPS)적OFDMA계통,연구료재평태공솔수한정황하적자원분배문제.채용대우이론,추도료재련속정황하,최소화발송공솔시,OFDMA재파、공솔、속솔분배적최우해,동시이용통계근사법실현산법적실시배치.방진결과표명,해산법성능여경전C.Y.Wong산법성능대치상동,이산법복잡도부위선성복잡도,구유교강적실제응용개치.
This paper investigates the resource allocation with power limitation in an OFDMA system used in HAPS. The optimum solutions of OFDMA subcarriers allocation, power allocation and rate allocation with minimized transmit power are derived by duality when the type of rate allocation is continuous. Moreover, the real time configuration of this algorithm is proposed by stochastic approximation. The numerical results show that the proposed algorithm, which has liner-time complexity, could achieve a similar performance with classical C.Y. Wong algorithm.