OFDM帧内误码率最小化的比特和功率分配方法

Bit and power allocation algorithm of BER minimization in OFDM frame

为使正交频分复用(OFDM)系统在总功率和比特数不变条件下,误码率最小化BM(Ber Minimum)的比特和功率联合分配算法帧内平均误码率最小,设计符号内以最小总名义功率为目标的迭代算法,提出以符号最小总名义功率为基础的符号间功率分配方法.仿真结果表明,该方法在码率性能和计算速度方面均有较大改善.

To minimize average bit rate error（BER） per orthogonal frequency division multiplexing（OFDM） frame under the constraint of total transmission power and data rate in time-varying channel,iterative algorithm of bit and power allocation aiming at minimum total virtual power （MTVP） in OFDM symbol was designed,and a method of power allocation among OFDM symbols based on MTVP was proposed.Simulation results show that the proposed bit and power allocation method improves the BER performance as well as calculation speed.