The Sub-optimal Power Allocation Adaptive Algorithm in OFDM Technology
Ding Bi · Computer Knowledge and Technology · 2015
According to the study of the existing algorithms in adaptive OFDM system related to the power allocation,consideringhigh computational complexity and the difficulty in achieving the system solutions,we present a near-optimal values of sub-opti-mal allocation algorithm.By using Lagrangian function and get the partial derivative,the system channel gain and receiving terminalcarrier SNR is known,we can obtain the approximate optimal value by using recycling loop iterative search algorithm.The simula-tion results show the algorithm can effectively reduce the system power and get a better result in OFDM-DS/CDMA down-linkchannel.