The performance analysis and simulation of coding schemes based on the modeling Ka band fixed satellite channel have been presented. The results indicate that concatenated codes with large inner interleaving depth ha...The performance analysis and simulation of coding schemes based on the modeling Ka band fixed satellite channel have been presented. The results indicate that concatenated codes with large inner interleaving depth have good performance and high spectrum efficiency. The studies also show that simple block interleaving is very effective in combating the slow frequency nonselective fading of Ka band.展开更多
文摘卫星信道的硬件数字孪生技术是卫星通信场景中物理层或数据链路层通信性能评估的重要手段,本文提出了一种适用于全阴影卫星信道的硬件实时模拟架构。首先,基于现场可编程门阵列(Field Programmable Gate Array,FPGA)平台,设计了一种基于迭代算法的复高斯序列产生方法。然后,基于坐标旋转数字计算(Coordinate Rotation Digital Computer,CORDIC)算法实现了幂指数与平方根函数的硬件计算,并结合时分复用思想研制了全阴影卫星信道衰落模拟器。与传统查找表(Look Up Table,LUT)方法和CORDIC算法相比,复高斯序列产生模块的资源消耗率分别降低了6.21%和5.23%。硬件测试结果表明,信道模拟器输出的衰落统计特性如概率密度函数与理论结果吻合,并且不同类型卫星信道多普勒形状也与理论结果符合,可用于全阴影卫星信道的硬件模拟。
文摘The performance analysis and simulation of coding schemes based on the modeling Ka band fixed satellite channel have been presented. The results indicate that concatenated codes with large inner interleaving depth have good performance and high spectrum efficiency. The studies also show that simple block interleaving is very effective in combating the slow frequency nonselective fading of Ka band.
