Error Protection of Stores Management System Data Transfers

摘要

Stores management systems are being converted from analog control to digital control. The DOD has chosen the MIL-STD-1553B multiplexed digital data bus as the communication channel for the digital stores management system. However, there is insufficient error protection inherent in MIL-STD-1553B to ensure reliable transfer of critical commands. This paper examines possible methods of improving the performance of the system within the constraints of MIL-STD-1553B. To achieve better performance (measured in probability of error and throughput), a combination of channel codes and specific transmission schemes are evaluated. Word error rates and block (message) error rates are calculated for each coding scheme. The block error rates are then used to determine the performance of each specific coding scheme-transmission scheme pair. Finally, the coding scheme-transmission scheme pairs are compared for probability of error and throughput. The analysis assumes independent random errors. All calculations are done for a range of bit error rates (10 to the -4th to 10 to the -7th power). Also included in this report is a method of implementing each coding scheme within the constraints of MIL-STD-1553B. (Author)