| 摘要: |
| 对检测到错误的S模式应答信号报文纠错，传统的方法是查表法，不仅效率很低，而
且要求很大的存储空间存放错误图样，不适合工程应用。通过对S模式应答信号的干扰情况
、编译码方式及循环码特性的深入研究，提出了余数计算的改进方法；再结合使用码元置信
度，实现了能快速、准确定位误码并纠正它们的算法。改进的纠错算法不仅效率高，而且占
用系统资源少，易于硬件实现，其有效性已得到工程应用的验证。 |
| 关键词: S模式 应答信号；突发脉冲干扰；循环冗余校验 检错 纠错 |
| DOI：doi:10.3969/j.issn.1001-893x.2013.06.016 |
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| 基金项目: |
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| An improved algorithm for Mode S error correction |
| LIANG Feng |
| () |
| Abstract: |
| To correct the Mode S reply message when the error is detected,the table lookup
is a traditional method. But it has very low efficiency,and plenty of space is
needed to store error patterns. This method is not suitable for the e
ngineering application. Through intensively studying the interference condition
s, coding of Mode S reply and the characteristic of cyclic code,an improved meth
od of calculating remainder is presented. As a result,an algorithm is realized
with which error codes can be located quickly and accurately by using the code c
onfidence, and then be corrected. The improved algorithm not only has very high effi
ciency, but also takes up less system resources, and can be implemented easily i
n hardware. The effectiveness of improved algorithm has been verified in the eng
ineering application. |
| Key words: Mode S reply message burst pulse interference cyclic redundancy check error detect error correction |
