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针对实际正交频分复用多址访问(OFDMA,Orthogonal Frequency Division Multiple Access)系统中整数比特的限制问题,以及用户间公平性要求较为松弛的情况,提出了一种新的整数比特条件下的功率与比特分配算法。该算法首先按公平比例进行功率和比特分配,然后对分配结果取整,并将剩余的功率与比特再进行分配。仿真结果表明:该算法保持用户间的比例公平性的基础上取得与贪婪算法接近的系统容量,公平性优于贪婪算法。
Aiming at the limitation of the integer bits in the Orthogonal Frequency Division Multiple Access (OFDMA) system and the relaxation of the fairness between users, a new integer bit condition Power and Bit Allocation Algorithm. The algorithm first performs power and bit allocation on a fair-rate basis, then rounds the allocation result and distributes the remaining power and bits. The simulation results show that the algorithm achieves a system capacity close to the greedy algorithm based on the fairness of users, and the fairness is better than the greedy algorithm.