FBMC-OQAM系统中一种改进的OPTS算法

针对采用重叠部分传输序列(overlapping partial transmit sequence, OPTS)算法来抑制滤波器组多载波-偏移正交幅度调制(filter bank multicarrier-offset quadrature amplitude modulation, FBMC-OQAM)信号的峰均比(peak-to-average power ratio, PAPR)时会导致计算量过高的问题,在对现有的禁忌搜索算法进行改进后提出一种基于并行禁忌搜索的OPTS(parallel tabu search overlapping partial transmit sequence algorithm, parallel-TS-OPTS)算法,通过将h路传统禁忌搜索算法得出的各自最优解进行遗传交叉操作来优化传统禁忌搜索算法的初始解,从而进一步增大算法搜索到最佳相位因子向量的概率。理论分析与仿真结果表明,本研究的算法可以在获得接近于OPTS算法PAPR抑制效果的同时显著降低算法的计算复杂度,进一步提高FBMC-OQAM系统应用在5G场景中的鲁棒性。

An improved OPTS algorithm in FBMC-OQAM system

To solve the problem of high computational complexity in the process of suppressing PAPR of filter bank multicarrier-offset quadrature amplitude modulation(FBMC-OQAM)applying the algorithm of overlapping partial transmit sequence(OPTS), a method of improved parallel tabu search overlapping partial transmit sequence algorithm(parallel-TS-OPTS)was proposed,which further increased the probability of finding the best phase factor vector by the operation of genetic crossover of the optimal solution of h-path traditional tabu search algorithm to optimize its initial solution. Theoretical analysis and simulation results showed that the proposed algorithm could not only achieve a PAPR suppression effect close to that of OPTS algorithm, but also significantly reduced the computational complexity of the algorithm, and further improved the robustness of FBMC-OQAM system applied in 5G scenarios.