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OFDM系统利用用户的多样性,根据信道状态对系统中的子载波资源进行动态的分配,有效的提高了系统的容量。最大化系统容量的子载波分配算法,忽略了用户之间的公平性。使某些信道状态不好的用户由于没有被分配子载波,不能进行数据的传送。针对这一问题提出一种新的子载波的分配方法,在有效保证系统容量的前提下,通过确保每个用户分配到的子载波数目,兼顾了用户之间资源分配的公平性。
OFDM system makes use of user’s diversity, allocates the subcarrier resources dynamically in the system according to the channel state, which effectively improves the system capacity. The subcarrier allocation algorithm that maximizes the system capacity ignores the fairness between users. So that some users with poor channel status can not transmit data because they are not assigned subcarriers. Aiming at this problem, a new subcarrier allocation method is proposed, which ensures the fairness of resource allocation among users by ensuring the number of subcarriers each user allocates while ensuring the system capacity effectively.