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针对现有的分组子载波分配算法、间隔子载波分配算法以及自适应分配算法公平性差、误码率高等不足,以多载波通信方案之一WPDM-CDMA为研究系统提出一种新的基于相对比特需求和传输功率函数的子载波分配算法,由于各个用户和基站间经历的信道环境存在差异,要综合考虑各个用户分配的公平性和资源的合理利用等因素,此算法根据用户比特需求,计算出分配过程中优先考虑的用户以及传输功率低的子载波,在5径Rayleigh信道下与分组算法和间隔算法进行仿真对比,仿真结果表明此算法在误码率性能和公平性方面优于其余2种算法.
Aiming at the disadvantages of the existing packet subcarrier allocation, interval subcarrier allocation and poor adaptive fairness and bit error rate, the adaptive bit allocation algorithm is proposed based on WPDM-CDMA, a multi-carrier communication scheme. Demand and transmit power function sub-carrier allocation algorithm, due to the difference between the channel environment experienced by each user and the base station, to take into account the fairness of each user allocation and the rational use of resources and other factors, the algorithm according to the user’s bit needs to calculate The priority users in the allocation process and the subcarriers with low transmission power are compared with the packet algorithm and the interval algorithm under the 5-path Rayleigh channel. The simulation results show that the proposed algorithm is superior to the other two in terms of bit error rate performance and fairness algorithm.