The frequency time selective fading resulted from multipath dispersion and Doppler frequency shift is an important characteristic of urban mobile radio channel.
由多径色散及多普勒频移造成的频率—时间选择性衰落是城市移动无线信道的一个重要特性。
Two simulation algorithms of realization channel characteristic are analyzed emphatically: shaping of slow fading with correlation and generation of frequency-selected multipath fading.
重点分析了实现信道特性仿真的两种算法：慢衰落的相关性整形和频率选择性多径衰落。
Based on the characteristic of multi-path frequency selective channel, the algorithm combines rapid table lookup and Lagrange-multiplier method to iteratively search the optimal bit allocation scheme.
算法根据多径信道选择性衰落的特性，结合查表法和拉格朗日乘子的混合迭代搜索法，最优地分配各个子载波的传输比特数。
Based on the characteristic of multi-path frequency selective channel, the algorithm combines rapid table lookup and Lagrange-multiplier method to iteratively search the optimal bit allocation scheme.
算法根据多径信道选择性衰落的特性，结合查表法和拉格朗日乘子的混合迭代搜索法，最优地分配各个子载波的传输比特数。
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