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自适应分配技术根据子信道的瞬时估计值动态地分配传输比特数和发送功率,可以优化正交频分复用(OFDM,Orthogonal Frequency Division Multiplex)系统的整体性能。这里讨论了基于容量优化的自适应比特分配算法,基于误比特率优化的最佳功率分配算法和次佳功率分配算法。仿真结果表明,对不同信道环境下三种算法的特点和性能进行了分析和比较。仿真结果表明,自适应分配技术可以优化系统的容量和误比特率。
The adaptive allocation technique can dynamically allocate the number of transmission bits and the transmission power according to the instantaneous estimation value of the subchannel to optimize the overall performance of an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplex) system. Here we discuss the adaptive bit allocation algorithm based on capacity optimization, the optimal power allocation algorithm and the sub-optimal power allocation algorithm based on bit error rate optimization. The simulation results show that the characteristics and performance of the three algorithms under different channel environments are analyzed and compared. Simulation results show that adaptive allocation technology can optimize system capacity and bit error rate.