In order to provide a novel and more effective alternative to the commonly used relay protection testing device that outputs only the sinusoidal testing signals, the concept of fault waveform regenerator is proposed i...In order to provide a novel and more effective alternative to the commonly used relay protection testing device that outputs only the sinusoidal testing signals, the concept of fault waveform regenerator is proposed in this paper, together with its hardware structure and software flow chart. Fault waveform regenerator mainly depends on its power amplifiers (PAs) to regenerate the fault waveforms recorded by digital fault recorder (DFR). To counteract the PA’s inherent nonlinear distortions, a digital closed-loop modification technique that is different from the predistortion technique is conceived. And the experimental results verify the effectiveness of the fault waveform regenerator based on the digital closed-loop modification technique.展开更多
针对双功能雷达通信(Dual-Functional Radar-Communication,DFRC)系统中雷达峰均比(Peak-to-Average Power Ratio,PAPR)导致的通信误码率高及通信信号的调制方式导致的雷达分辨率降低的问题,在总功率和PAPR约束下对下行链路多用户通信...针对双功能雷达通信(Dual-Functional Radar-Communication,DFRC)系统中雷达峰均比(Peak-to-Average Power Ratio,PAPR)导致的通信误码率高及通信信号的调制方式导致的雷达分辨率降低的问题,在总功率和PAPR约束下对下行链路多用户通信与目标探测的双功能雷达通信一体化波形设计进行了简要介绍。首先,以总功率与PAPR为约束条件,以多用户干扰(Multi-User Interference,MUI)能量与雷达波形相似度加权和为目标函数,并引入加权因子ρ动态调整通信雷达性能偏好。其次,采用标准交替方向乘子(Alternating Direction Multiplier Method,ADMM)算法,并引入增广拉格朗日函数,通过变量分裂实现优化求解。最后,对所提方法的通信误码率和雷达分辨率等性能进行了仿真。结果表明,所提方法相较于传统方法实现了动态场景下通信和速率的提升,且与恒模约束相比和速率增幅达4.5%,雷达探测概率在低信噪比时达到0.8以上,并最终趋于稳定值1。展开更多
文摘In order to provide a novel and more effective alternative to the commonly used relay protection testing device that outputs only the sinusoidal testing signals, the concept of fault waveform regenerator is proposed in this paper, together with its hardware structure and software flow chart. Fault waveform regenerator mainly depends on its power amplifiers (PAs) to regenerate the fault waveforms recorded by digital fault recorder (DFR). To counteract the PA’s inherent nonlinear distortions, a digital closed-loop modification technique that is different from the predistortion technique is conceived. And the experimental results verify the effectiveness of the fault waveform regenerator based on the digital closed-loop modification technique.
文摘针对双功能雷达通信(Dual-Functional Radar-Communication,DFRC)系统中雷达峰均比(Peak-to-Average Power Ratio,PAPR)导致的通信误码率高及通信信号的调制方式导致的雷达分辨率降低的问题,在总功率和PAPR约束下对下行链路多用户通信与目标探测的双功能雷达通信一体化波形设计进行了简要介绍。首先,以总功率与PAPR为约束条件,以多用户干扰(Multi-User Interference,MUI)能量与雷达波形相似度加权和为目标函数,并引入加权因子ρ动态调整通信雷达性能偏好。其次,采用标准交替方向乘子(Alternating Direction Multiplier Method,ADMM)算法,并引入增广拉格朗日函数,通过变量分裂实现优化求解。最后,对所提方法的通信误码率和雷达分辨率等性能进行了仿真。结果表明,所提方法相较于传统方法实现了动态场景下通信和速率的提升,且与恒模约束相比和速率增幅达4.5%,雷达探测概率在低信噪比时达到0.8以上,并最终趋于稳定值1。
