使用Ka频段信道扩展卫星通信速率,已成为解决海上舰船大容量传输需求的主要手段.适合海上移动ka频段信道特性的编译码技术,可以大大提高通信速率.通过研究Ka频段海上移动卫星信道特性,提出了一种针对性的Turbo码编译码方案,并利用修正的信道可靠性常数,不但可确保方案具有较高的译码性能,还提高了编译码硬件运行效率.最后,对方案在Ka频段海上移动卫星通信信道下的性能进行建模仿真,结果表明采用Turbo码比采用相同速率的卷积级联码和卷积码有超过1 dB以上的增益.%Shipped mobile satellite communication that adopts Ka-band for higher data rate, now becomes the main means for resoving mass data-transmitting demand of ships, and the channel coding scheme suitable to the channel character could greatly improve the communication rate. Based on the characteristics of Ka-band shipped mobile satellite communication channel, a turbo coding scheme is proposed, thus with the modified channel coefficient, the fairly high decoding performance of the scheme is ensured and the operation efficiency of the coding/decoding hardware improved. Finally the model of Ka-band mobile satellite communication channel is analyzed, and the simulation indicates that the turbo coding scheme has more 1.0dB gain than the convolation coding or convolution concatenated coding scheme.
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