星载MIMO检测算法的抗SEU技术研究

发布时间：2018-11-28 14:57

【摘要】：2011、2012年韩国和我国分别向ITU组织提交了基于LTE通信体制的卫星移动通信系统标准化草案,标志着LTE通信体制将成为未来卫星移动通信的主流通信体制。MIMO作为LTE通信体制的核心技术之一,能在不增加带宽的情况下,增加系统容量、提高频谱利用率。将MIMO技术运用于星载平台是当前卫星LTE移动通信系统中要研究的关键技术问题,其中资源受限和空间辐照是首先需要解决的两个瓶颈问题,因此本文以星载MIMO检测算法为切入点,研究了相应的低开销的抗单粒子翻转方法,给出了基于LCTMR和基于SEC-SED的MIMO检测算法;同时在系统架构设计方面,引入可重构设计思想,研究了可重构模块颗粒度对星载MIMO检测算法可靠性的影响,主要工作和创新点如下:1.针对现有基于三模冗余设计的MIMO检测算法资源占用率高的问题,提出了一种基于LCTMR星载MIMO检测算法的抗SEU方法。该方法采用动态定标和自适应有效位提取,以减少部分乘法器的数据位宽,并优化三模比较器设计来对误差进行补偿和修正,有效降低了MIMO检测算法资源占用率,进而降低了单粒子翻转概率。仿真与测试结果表明,与TMR-MIMO检测算法相比,以较小的误比特性能损失,换取了抗SEU性能的显著提升。2.借鉴基于SEC-DED的传统抗SEU方法,提出一种基于SEC-SED星载MIMO检测算法的抗SEU方法。通过构造包含矩阵数据相关性信息的冗余数据,并将其伴随原矩阵数据进行统一的运算,利用冗余数据运算结果所蕴含的内在规律,检测和纠正矩阵乘积运算过程中因单粒子翻转影响产生的错误。仿真与测试结果表明,与基于三模冗余的检测算法相比,所提方法以较小的检错纠错时延为代价,降低资源占用率约30%,软错误概率减少约25%。3.引入可重构设计思想,针对可重构模块颗粒度会对系统可靠性产生影响的问题,提出一种可重构马尔科夫模型,并对其可重构模块颗粒度与系统可靠性间的关系进行分析,在此基础上,给出了基于SEC-SED的可重构MIMO检测算法设计。仿真结果表明,可重构设计的可靠度优于非可重构设计,且重构颗粒度越小可靠度越高。4.基于V6测试平台实现了基于SEC-SED的动态重构MIMO检测算法,通过设计一种快速高效的等比降维故障注入法,对重构设计进行故障注入测试,验证了算法的抗SEU性能。
[Abstract]:In 2011, South Korea and China submitted the standard draft of satellite mobile communication system based on LTE communication system to ITU in 2012. As one of the core technologies of LTE communication system, MIMO can increase system capacity and spectrum efficiency without increasing bandwidth. The application of MIMO technology to spaceborne platform is the key technical problem to be studied in the current satellite LTE mobile communication system, in which resource limitation and space irradiation are the first two bottleneck problems to be solved. Therefore, in this paper, the space-borne MIMO detection algorithm is taken as the starting point, and the corresponding low-overhead anti-single-particle inversion method is studied, and the MIMO detection algorithm based on LCTMR and SEC-SED is presented. At the same time, in the aspect of system architecture design, the paper introduces the reconfigurable design idea, and studies the impact of reconfigurable module granularity on the reliability of spaceborne MIMO detection algorithm. The main work and innovation are as follows: 1. In order to solve the problem of high resource utilization of existing MIMO detection algorithms based on three-mode redundancy design, a novel anti-SEU method based on LCTMR spaceborne MIMO detection algorithm is proposed. In this method, dynamic calibration and adaptive effective bit extraction are used to reduce the bit width of the partial multiplier, and the design of the three-mode comparator is optimized to compensate and correct the error, which effectively reduces the resource occupancy rate of the MIMO detection algorithm. Furthermore, the probability of single particle inversion is reduced. The simulation and test results show that compared with the TMR-MIMO detection algorithm, the performance loss of bit error is smaller, and the anti-SEU performance is significantly improved. 2. 2. Based on the traditional anti-SEU method based on SEC-DED, an anti-SEU method based on SEC-SED spaceborne MIMO detection algorithm is proposed. By constructing the redundant data which contains the correlation information of matrix data, and carrying on the unified operation with the original matrix data, the inherent law of the result of the redundant data operation is used. Detect and correct errors caused by single-particle flip in matrix product operation. The simulation and test results show that compared with the detection algorithm based on three-mode redundancy, the proposed method reduces the resource occupancy by about 30 percent and the probability of soft error by about 25. 3 at the cost of less error correction delay. By introducing the idea of reconfigurable design, a reconfigurable Markov model is proposed to solve the problem that the particle size of reconfigurable modules will affect the reliability of the system, and the relationship between the granularity of reconfigurable modules and the reliability of the system is analyzed. On this basis, the design of reconfigurable MIMO detection algorithm based on SEC-SED is presented. The simulation results show that the reliability of the reconfigurable design is better than that of the non-reconfigurable design, and the smaller the reconfigurable particle is, the higher the reliability is. The dynamic reconfigurable MIMO detection algorithm based on SEC-SED is implemented based on V6 test platform. By designing a fast and efficient equal ratio reduced-dimension fault injection method, fault injection test of the reconfiguration design is carried out, and the anti-SEU performance of the algorithm is verified.
【学位授予单位】：解放军信息工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.3

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