摘要
针对USB(统一S频段)通信中副载波信号的功率分配问题,提出了一种载波功率分配策略,实现了副载波功率的最优分配,达到了提高功率效率的目的。结合某卫星副载波的特点,以应答机对副载波的检测门限为依据,对测控上行各副载波功率进行分配。计算结果表明,该载波功率分配策略在残留载波和遥控指令副载波的调制损耗上要优于传统常用调制度分配方法。该功率分配策略能够为卫星通信提供更佳的功率分配,使上行各种副载波信号能够达到卫星接收解调的最佳门限。
A new carrier power allocation strategy is proposed for optimal allocation of power to subcarriers in USB （Unified S-Band） communication to increase power efficiency. Power is allocated to uplink subcarriers based on the subcarrier detection threshold of the transponder taking into consideration the subcarrier features of a model of satel- lite. Calculation results show that the carrier power allocation strategy is superior to traditional modulation index al- location methods in residual carrier modulation loss and telecommand subcarrier modulation loss. The strategy pro- vides better power allocation for satellite communication by assuring that each subcarrier signal reaches its optimal threshold for reception and demodulation on board the satellite.
出处
《飞行器测控学报》
CSCD
2013年第5期393-397,共5页
Journal of Spacecraft TT&C Technology
基金
"十二五"技侦航天装备预研项目(No.4099010601)
关键词
功率分配
检测门限
调制损耗
最佳门限
power allocation
detection threshold
modulation loss
optimal threshold
