The high frequency (HF) channel simulators with time-varying parameters based on the Watterson model are analyzed. The methods of simulating the HF channel with time-varying parameters are proposed. The linearly time-...The high frequency (HF) channel simulators with time-varying parameters based on the Watterson model are analyzed. The methods of simulating the HF channel with time-varying parameters are proposed. The linearly time-varying delay spread is introduced into the channel simulators to simulate the transition states between two channel modes of CCIR520-1. Two signals, including a 500 Hz and a 1 000 Hz bandwidth signal are respectively input into the standard Watterson HF channel model and the proposed channel model with time-varying parameters. Some simulation results prove that the proposed HF channel model with time-varying parameters can reflect the time-varying characteristics of frequency selected fading of HF channel.展开更多
在美国电信科学协会(institute for telecommunication sciences,ITS)模型的基础上设计了一款易于仿真实现的宽带短波信道模拟器。通过分析其信道散射函数,验证了宽带短波信道模拟器模拟实际短波信道的有效性。采用该宽带短波信道模拟...在美国电信科学协会(institute for telecommunication sciences,ITS)模型的基础上设计了一款易于仿真实现的宽带短波信道模拟器。通过分析其信道散射函数,验证了宽带短波信道模拟器模拟实际短波信道的有效性。采用该宽带短波信道模拟器仿真测试了24 kHz信道带宽下的单载波频域均衡(single carrier modulation system withfrequency domain equalization,SC-FDE)数据传输系统的性能,说明了宽带短波信道模拟器的实际工作能力,并通过与Watterson信道模拟器的测试结果对比,证明了该宽带短波信道模拟器能更准确地测试短波宽带高速数据传输系统的性能。展开更多
文摘The high frequency (HF) channel simulators with time-varying parameters based on the Watterson model are analyzed. The methods of simulating the HF channel with time-varying parameters are proposed. The linearly time-varying delay spread is introduced into the channel simulators to simulate the transition states between two channel modes of CCIR520-1. Two signals, including a 500 Hz and a 1 000 Hz bandwidth signal are respectively input into the standard Watterson HF channel model and the proposed channel model with time-varying parameters. Some simulation results prove that the proposed HF channel model with time-varying parameters can reflect the time-varying characteristics of frequency selected fading of HF channel.
