一种低复杂度遥测数据删除卷积译码方式

A Low Complexity Method of Telemetry Data Punctured Convolution Decoding

针对航天测控通信中遥测数据删除卷积码的译码,提出了一种低复杂度、低资源占用量的译码方法。介绍了卷积码和删除卷积码的原理和区别、传统遥测数据删除卷积的译码方式,针对其在高码率时资源消耗量大的问题,提出了一种改进方法,采用遥测节点同步的方式,在卷积译码前即可确认删除码率和数据组合;对比了2种方式的资源占用量和译码性能,说明采用遥测节点同步的方式可以有效地减少译码器的使用,大大节省了资源占用量。

A low complexity and low resource occupancy decoding method is proposed for the decoding of telemetry data punctured convolution codes in aerospace TT&C communications.The principle and the differences of convolution codes and punctured convolution codes are introduced first,and the traditional decoding method of telemetry data punctured convolution is given.In order to solve the problem of high resource consumption at a high bit rate,an improved method is proposed,where the synchronization of telemetry nodes is used to confirm the punctured bit rate and data combination before convolution decoding.Finally,the resource consumption and the decoding performance of the two methods are compared,which shows that the use of decoders can be effectively reduced through the synchronization of telemetry nodes,greatly saving the resource consumption.