航空信道仿真研究

在对航空信道物理特性分析的基础上,提出了一个适用于空-空、地-空无线链路的宽带频率选择性衰落频域信道仿真器。选择合适的仿真参数,该仿真器可以模拟航空器在停场、滑行、飞行等状态的无线衰落信道。宽带频率选择性信道仿真器由多个并行子信道仿真器在频域构成,每个子信道为一个简单结构的平坦衰落模型,执行独立的瑞利衰落,这样的多个并行子信道构成了一个宽带频率选择性信道的仿真结构,非常适合正交频分复用或者多载波码分多址系统信道的计算机仿真。

Simulation Study of Aeronautical Channel

This paper proposes a simulation structure for aeronautical wideband frequency-selective channel,which features ground-air and air-air wireless links.With appropriate channel parameters,the channel emulators of the parking,taxi and en-route states can be modeled in frequency domain.The wideband frequency-selective channel consists of some parallel sub-channels in frequency domain,which are assumed to be independent to each other and have Rayleigh-distributed envelopes.The sub-channel models and emulators are based on a simple structure and characterized by flat fading.Through such decomposition approach,a frequency domain frequency-selective channel model can be achieved,which is suitable for an implementation of orthogonal frequency-division multiplexing(OFDM) or multi-carrier code-division multi-access channel emulator.