摘要
为在短波组网通信中减小信号衰落和信道干扰对信号功率的影响,防止反向功率过大烧坏功放,本文设计一种数字化短波发射机功率自适应系统。该系统在发射机功放后端耦合出反向功率,通过FPGA功率检测单元反馈给DSP,实时控制,防止反向功率过大;同时,在DSP单元中,运用BDPC算法,结合各个收信方发来的误码率及信噪比等数据,实时控制发信方发射功率。实验结果表明,该系统在保护反向功率的前提下达到了功率自适应的目的且效果明显。
A digital shortwave transmitter power adaptive system is designed in this paper in order to reduce the effects of signal fading and channel interference on signals in shortwave communication and also to prevent excessive reverse power from burning out power amplifier . The system couples reverse power in the back-end of power amplifier to DSP through the FPGA power detection unit, holding back excessive reverse power . In the meantime , applying BDPC algorithm and combining with the BER, SNR and other data from each receiving party, the system controls power from the transmitting party in real time. The results of the experiment show that the system achieve the goal of the adaptive power on the premise of reverse power protection with a obvious effect.
出处
《舰船科学技术》
北大核心
2015年第10期137-140,共4页
Ship Science and Technology
