平流层CDMA系统不同位置小区上行链路系统容量的研究及解决方案

Study on HAPS-CDMA sells up-link capacity with different positions and solution

分析了平流层CDMA系统位于平台下方不同位置的各小区的上行链路系统容量分布情况,仿真证明小区离平台越远,所受系统间干扰越大,系统容量越低;提出了一种平衡系统容量的方案,即在远离平台,系统容量需求大的小区采用地面基站和平流层基站协同工作的方式来降低平台基站所受的小区内干扰,从而减轻系统间干扰,增加对系统容量的影响,仿真结果说明该方案很好地控制了位置因素对系统容量的影响,对系统性能的改善明显。

The effects of positions on HAPS-CDMA cells＇ up-link capacity were analyzed.The simulation results show that the far the cell is from the High Altitude Platform,the more interruption it suffers,so the capacity decreases more.Then a novel user access solution was presented to balance the capacities of different cells,namely the mechanisms of the signals from the users in the cells far from the HAPS which need larger capacity received by both of the terrestrial CDMA base station and the HAPS-CDMA base station.From numerical results it is observed that the algorithms can reduce the impact of the cell position on the capacity,and improve the system performance significantly.