CAJ | 학술논문

在融合遗传算法和解析方法的基础上,提出了一种新颖的正交频分多址接入系统资源分配算法.通过最小化评估函数和取整操作,得到满足用户要求的数据速率和误码率,同时使系统总传输功率最小化.与传统遗传算法相比,该算法避免了注水过程,其计算复杂度大幅降低,且不受数据速率增长的影响.仿真实验表明该算法的收敛性和稳定性好;在相同的用户数据速率和误码率要求下,该算法得到的最小化传输功率随用户数增加较为缓慢,接近于解析法得到的理想性能;在平均比特信噪比相同的情况下,该算法能使实际系统误码率接近理论低值.
재융합유전산법화해석방법적기출상,제출료일충신영적정교빈분다지접입계통자원분배산법.통과최소화평고함수화취정조작,득도만족용호요구적수거속솔화오마솔,동시사계통총전수공솔최소화.여전통유전산법상비,해산법피면료주수과정,기계산복잡도대폭강저,차불수수거속솔증장적영향.방진실험표명해산법적수렴성화은정성호;재상동적용호수거속솔화오마솔요구하,해산법득도적최소화전수공솔수용호수증가교위완만,접근우해석법득도적이상성능;재평균비특신조비상동적정황하,해산법능사실제계통오마솔접근이론저치.
Combined the conventional genetic algorithm with the analytic method,a novel algorithm was proposed to allocate the source of orthogonal frequency division multiplex access system.Through minimizing the evaluation function and operating a rounding,the total transmitted power can be minimized while satisfying the bit rate requirement and bit error rate（BER） constraint of each user.Compared with the conventional genetic algorithm the proposed algorithm,can avoid the water-filling processing,so its computational complexity decreases sharply and is independent of the bit rate.The simulations indicate that the proposed algorithm has better convergence and stability than the conventional genetic algorithm.Under the same required user＇s bit rate and BER,the minimized transmitted power obtained by the proposed algorithm increases slowly with the number of the user,which is close to the performance of the analytic method.Given the same average bit signal to noise ratio,the proposed algorithm can successfully achieve the BER that is almost close to the theoretical minimum.