部分傳輸序列法中副信息功率分配的優(yōu)化算法
Optimization Arithmetic for the Power Allocation Scheme on Partial Transmit Sequences
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摘要: 該文分析了部分傳輸序列法中副信息功率分配方案對系統(tǒng)性能的影響和求解最優(yōu)功率分配因子 的方法；并提出一種簡單的求解次優(yōu)功率分配因子的算法。分析和仿真結(jié)果表明，平均各數(shù)據(jù)子載波上降低少量發(fā)送功率，都能在副信息子載波上得到很大增益；隨著信噪比的上升，系統(tǒng)趨于將總發(fā)送功率平均分配到所有子載波上；在最優(yōu)及次優(yōu)功率分配因子條件下得到的系統(tǒng)誤比特率與其理想值相吻合。
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關(guān)鍵詞:
- 正交頻分復(fù)用; 峰值平均功率比; 部分傳輸序列; 功率分配
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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