摘要
以国际标准CRC-CCITT循环冗余校验码为研究对象,利用近世代数多项式理论证明其奇偶校验性质、最小码距和纠正单比特错误能力.在分析无线通信系统中单比特错误帧分布的基础上,提出一种利用CRC纠正每帧单比特错误的新方案.仿真结果证明,应用CRC纠错可以改善比特误码率、帧错误率和吞吐量,特别是在原始误码率为10-3～10-5区间吞吐量有显著提高;在不改变原有无线通信系统结构的条件下提高了数据传输性能.给出了新方案的一种低复杂度的实现方法.
The CRC-CCITT cyclic redundancy check code in international standard is studied in this paper. The polarities check ability, minimum code distance and capacity of correct single bit error of CRC-CCITT are proved by using galois field polynomial theory. A new scheme of using CRC to correct single bit error in one frame is provided based on the analysis of single bit error frame distribution in wireless communications. Simulation results have proved that CRC error correcting can improve the performances of bit error rate,packet error rate and throughput of a communications system. Especially under the condition of the original bit error rate ranging from 10^-3 ～ 10^-5, the throughput of wireless communications system has greatly improved. Without any changing of the original structures, new scheme has improved the performance of data transmission. A low complexity implementation method of this scheme is given.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2005年第8期726-729,共4页
Transactions of Beijing Institute of Technology
基金
教育部高校青年教师基金资助项目(1999-2005)
关键词
循环冗余校验码
纠错编码
单比特错误
帧错误概率
吞吐量
cyclic redundancy check
correct error
single bit error
frame error probability
throughput
