一种具有最低平均能量的星座图设计方法

Constellation Map Design Method with Minimum Average Energy

通信系统的抗干扰能力、能量等指标,与其星座图中信号点的排列方式密切相关。空间利用率是空间中有效图形的占有面积(或体积)与总面积(或体积)的比值,对充分利用平面或空间资源具有重要的理论指导意义。因此,介绍一种在保证信号点之间的欧氏距离不变时,以达到最高空间利用率为手段设计的信号点排列方法。通过研究在不同点数时该排列方法与N-QAM的系统平均能量,发现前者的能量一般只有后者的80%~90%,体现了该排列方法在降低系统能量方面的优越性。

The anti-interference ability, energy and other indicators of the communication system are closely related to the arrangement of signal points in the constellation diagram. Space utilization is the ratio of the occupied area (or volume) of the effective figure in space to the total area (or volume), which has important theoretical guiding significance for making full use of planar or spatial resources. Therefore, a method of arranging signal points is introduced, which achieves the highest space utilization on the basis of ensuring that the Euclidean distance between signal points is constant. By exploring the system average energy of N-QAM at different points, it is found that the energy of the former is generally only 80%-90% of the latter, which embodies the superiority of the arrangement method in reducing system energy.