低轨卫星上行链路自适应能量检测算法

LEO Satellite Uplink Adaptive Energy Detection Algorithm

能量检测算法比较简单,实际应用较为广泛,但在低信噪比环境下实施比较困难,存在噪声不确定等问题。传统的能量检测算法将噪声功率默认为是1,但是低轨卫星运行环境是复杂多变的,噪声也会不断变化,对检测性能会产生很大的影响。深入分析噪声不确定对检测性能产生的影响,并提出一种自适应的能量检测算法。仿真结果表明,该算法能够在噪声不确定的环境中保证能量检测的性能。

The energy detection algorithm is relatively simple and has widely application in the spectrum sensing,but it is difficult to implement in the low SNR environment and the noise is uncertain. The default power of noise in the traditional energy detection algorithm is 1,but the LEO satellite operating environment is complex and the changing of noise will have a huge impact on the detection performance. This paper analyzes the noise uncertainty impact on the detection performance and proposes an adaptive energy detection algorithm. The simulation results show that the algorithm has good performances in the noise uncertain environment.