Aiming at the problem of scarcity of on-board resources and low energy utilization efficiency in multi-beam satellite communication system

this paper proposed the power allocation algorithm in distributed satellite cluster network downlink considering both system power consumption and data rate. And the energy efficiency of the system is optimized by reasonable resource allocation. First we built distributed satellite cluster power allocation model and transformed the problem of fractional form to simple subtractive form. Then based on convex optimization

the power-data rate trade off power allocation algorithm is proposed

and the trade-off between energy efficiency (EE) and spectral efficiency (SE) is discussed. The numerical results validate the effectiveness of the proposed algorithm and the EE-SE tradeoff

and the influence of circuit power on system performance is also analyzed.