摘要
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.
出处
《通信技术》
2017年第3期406-409,共4页
Communications Technology
