Research On SEU-tolerant Design Of Spaceborne MIMO Detection Algorithm

South Korea and China, respectively submitted the standardized draft of satellite mobile communication system to the ITU organization in 2011 and 2012, which is based on the LTE communication system. Those marks the LTE communication system will become the mainstream of future satellite mobile communications system. MIMO, as one of the core technologies of LTE communication system, can increase the system capacity and improve spectrum efficiency under the condition of without increasing bandwidth. However, the application of MIMO technology to spaceborne platform will be faced with the limit of resources and space radiation two bottleneck problems. This dissertation takes the MIMO detection algorithm as a starting point. From the perspective of algorithm level, two MIMO detection algorithm based on SEC-SED and LCTMR design are given. From the perspective of system level, the effect of reconfigurable module granularity on the reliability of the spaceborne MIMO detection algorithm is studied. Main work includes the following aspects:1. Considering the design of MIMO detection algorithm based on triple modular redundancy take up a lot of resources. A spaceborne MIMO detection algorithm based on LCTMR is put forward. The dynamic calibrate and adaptive bit extraction reduces the effective portion of the multiplier bit width, and optimizes three-mode comparator to reduce errors. Simulation and test results show that, compared with existing multiple-input multiple-output detection algorithms based on spaceborne platforms, low-cost triple modular redundancy design has only a relatively small loss of bit error rate, but its hardware resource utilization rate significantly decreased and the single event upset resistance is increased.2. Learning from the traditional anti-SEU method based on SEC-DED, a kind of spaceborne MIMO detection algorithm based on the SEC-SED is put forward. By constructing matrix data contains information related to redundancy data, process and compute this part of the data associated with the original matrix data. Use the redundant data calculation results implied inherent laws to detect and correct matrix multiplication operation errors due to the impact of SEU. Simulation and test results show that compared with the detection algorithm based on triple modular redundancy,the proposed method, at the expense of the smaller error detection and error correction delay reduces about 30% resource usage rate and about 25% soft error probability.3. Introduction the reconfigurable model and considering the interference of reconfigurable module particle size may impact the reliablility of system, a kind of reconfigurable Markov model and studied the relationship between reconfigurable module particle size and system reliability is put forward. The reconfigurable design of MIMO detection algorithm is given based on SEC-SED. Simulation results show that the reliability of reconfigurable design is much higher than non-reconfigurable design. And the smaller the reconfiguration particle size, the higher the reliability.4. Realizing the dynamic reconfiguration MIMO detection algorithm on V6 test platform which is based on the method of SEC-SED. Then a fast and efficient geometric dimension reduction fault injection method is proposed. Designed by this method, a fault injection test is done to verify the anti-SEU performance of algorithm.