低轨卫星上行链路自适应能量检测算法  

LEO Satellite Uplink Adaptive Energy Detection Algorithm

作　　者：周峰[1,2] 谢卓辰[1,2] 庞博[1] 马陆[1] 龚文斌[1] 

机构地区：[1]上海微小卫星工程中心,上海201203 [2]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《遥测遥控》2013年第5期27-32,共6页Journal of Telemetry,Tracking and Command

基　　金：中科院创新基金项目(CXJJ-11-S107);上海市自然科学基金(11ZR1435000)

摘　　要：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.

关 键 词：低轨卫星 频谱感知 能量检测 自适应 

分 类 号：TN927+.2[电子电信—通信与信息系统]