：该文研究OFDM 系统在总功率和误比特率限定下最大化传输速率的问题，并且考虑实际系统中整数比特的限制，

提出基于灌水法则的两种比特分配算法——改进贪婪算法和对分灌水线搜索法-The maximization of data rate under the constraint of total transmit power and bit error rate is a

considerable issue in OFDM system. Recognizing that the number of bits on each subcarrier must be a discrete

number for real systems, this paper proposed two bit allocation algorithm which are modified greedy algorithm

and water filling level binary searching algorithm.