部分传输序列法中副信息功率分配的优化算法
Optimization Arithmetic for the Power Allocation Scheme on Partial Transmit Sequences
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摘要: 该文分析了部分传输序列法中副信息功率分配方案对系统性能的影响和求解最优功率分配因子 的方法；并提出一种简单的求解次优功率分配因子的算法。分析和仿真结果表明，平均各数据子载波上降低少量发送功率，都能在副信息子载波上得到很大增益；随着信噪比的上升，系统趋于将总发送功率平均分配到所有子载波上；在最优及次优功率分配因子条件下得到的系统误比特率与其理想值相吻合。Abstract: When the total transmitting power is limited, the authors investigate the effect of different power allocation schemes on the side-information and the arithmetic to obtain the optimal power allocation coefficient for the system with Partial Transmit Sequences (PTS). Besides, the authors propose a new simple arithmetic to obtain the sub-optimal coefficient. The simulation results indicate that reducing a little power on every data carrier will obtain large gain on side-information carriers. With increasing the signal to noise ratio, the system is apt to averagely allocate the total power on every carrier. The bit error rate with the optimal or sub-optimal coefficient is close to the ideal value.
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