【摘要】 功率控制是实现共道干扰管理、合理分配无线资源、提高系统容量的重要工具。以前,对功率控制算法及其收敛性的研究都是建立在功率可连续变化的基础上。而实际上,功率级只能以离散级别调整。用定点计算舍入误差分析方法,量化功率离散对功率分配最优解的影响,提出两种改进型离散功率控制方法,仿真结果表明提出的改进型算法能很好地抑制自振荡。更多还原

【Abstract】 Transmitter power control has proven to be an efficient method to control cochannel interference in cellular PCS, and to increase bandwidth utilization. Most of the previous studies have assumed that the transmitter power level is controlled in a continuous range. In practice, however, power levels are assigned from a discrete set. In this paper we analyze the difference between the optimal continuous power vector and the optimal discrete one employing the method of round off error analysis in digital computation. Two improved ceiling DDPC algorithms are presented, and a simple example is shown that the proposed algorithms alleviate oscillation.更多还原