一种OFDM系统中的快速位加载算法

A New Bit Allocation Algorithm in OFDM System

提出了一种单用户OFDM系统中的自适应比特分配技术。在目标BER要求的前提下,采用两步比特分配算法为每个子载波分配相应的比特数,最终使发射功率最小。仿真结果表明:该算法的性能接近最优算法,较传统的算法性能有较大的提升,而算法复杂度大大降低。

A new adaptive bit and power allocation algorithm in single user OFDM system is proposed. At the request of object BER, the bit allocation algorithm is used in two steps to allocate appropriate bits to each subcarrier, finally the sum power is minimized. The simulation results shows that the performance of the proposed algorithm is approaching to that of the optimization method, and the complexity of the algorithm is greatly reduced.