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红外无线通信系统中,为了在功率和误码率一定的限制下进一步提高系统容量,提出了一种新的变步长自适应功率分配算法,该算法以每比特分配功率的代价最小为原则(一次可分配多个比特)来选择最佳的调制技术。分析了其速度原理,并在建立模型的基础上,通过仿真研究了新算法的系统性能,并与理想注水算法以及传统的简单速率量化算法进行比较。仿真结果表明,新算法在满足误码率和功率恒定的情况下,其系统容量曲线比简单速率量化算法更接近于理想的容量曲线,即更有效地分配了发射功率。因此,变步长自适应功率分配算法在室内无线激光通信的应用中具有一定的意义。
In the infrared wireless communication system, in order to further improve the system capacity under the limited power and bit error rate, a new variable step size adaptive power allocation algorithm is proposed, which is based on the principle that the cost of allocating power per bit is the minimum Can allocate multiple bits at a time) to select the best modulation technique. The speed principle is analyzed. Based on the model, the system performance of the new algorithm is studied by simulation, and compared with the ideal water injection algorithm and the traditional simple rate quantization algorithm. The simulation results show that the new algorithm, when meeting the bit error rate and the constant power, has a system capacity curve that is closer to the ideal capacity curve than the simple rate quantization algorithm, that is, the transmission power is allocated more efficiently. Therefore, variable step size adaptive power allocation algorithm has some significance in the application of indoor wireless laser communication.