The optimization arithmetic for power allocation scheme on partial transmit sequences

The performance of the system with partial transmit sequences is dominated by the side-information. On the premise of that the total transmitting power is limited, the authors investigate the effect of different power allocation schemes between the data and side-information. The arithmetic to obtain the optimal power allocation coefficient is proposed. Besides, the authors propose a new simple arithmetic to obtain the sub-optimal coefficient. The simulation results prove that when the number of carriers is large enough, reducing a little power on every data carrier will obtain large gain on the side-information. So the system is apt to averagely allocate the power to all carriers. Increasing signal noise ratio, the required additional power on the side-information decreases. The bit error rate with the optimal or sub-optimal coefficient is close to the ideal value.