极化复用方式下高性能数传基带奇偶合路实时处理方法

High Performance Real-time Odd-even Channels Combination Algorithm for Transmission Baseband Data Using Dual-polarized Technology

数传基带奇偶合路实时处理,是极化复用方式下卫星过境弧段即时判读星载设备状态及获取空间科学探测成果的前提和基础。面向空间科学卫星高速数传实时处理需求,针对传统合路处理方法受限于内存拷贝与排序操作导致处理性能较低的问题,提出一种使用环形队列对数据进行内存管理并基于各虚拟信道奇偶单路传输帧计数自然有序特征进行合路处理的新方法,有效规避频繁的内存移动与复杂耗时的排序操作,显著提升奇偶合路实时处理性能。空间科学卫星任务的工程实践结果表明,所提方法的实时合路性能满足ASO-S卫星1Gbit·s^(–1)和CASEarth卫星1.6 Gbit·s^(–1)的高速数传实时处理需求。

Odd-even frames real-time combination for transmission baseband data which used dual-polarized technology is the prerequisite and basis for timely monitoring of satellite equipment status when the satellite is in transit arc and early access to scientific exploration data by satellite ground application system.A high performance real-time odd-even channels combination algorithm for transmission baseband data which uses dual-polarized technology is proposed to meet the need of scientific satellite real-time high-speed data processing.This method makes full use of the naturally ordered frame counting feature of each virtual channel and applies the circular memory management design of circular queue.Therefore,this method effectively avoids the time-consuming sort and frequent memory moving operations compared to traditional algorithms.The space science satellites’engineering practice shows that the speed of combination meets ASO-S’s 1 Gbit s^(–1)and CASEarth’s 1.6 Gbit s^(–1)real-time processing requirements.