电子学报2018，Vol.46Issue(6)：1530-1536,7.DOI:10.3969/j.issn.0372-2112.2018.06.038
利用帧同步码的卷积交织器快速盲识别方法
Fast Blind Recognition of Convolutional Interleavers Based on Existence of Frame Sync Codes
摘要
Abstract
Channel coding technology is widely used in digital wireless communication systems for forward error cor-rection. Channel coding recognition means to reversely recognizing the coding parameters. For blind recognition of convolu-tional interleavers,the existing method based on the existence of frame sync codes has high computational complexity,and is not able to recognize the depth starting point. The method even fails for certain interleaver and frame length combinations. Its main computation is in recognizing the period of frame sync code in the interleaved sequence. In this paper,a low com-plexity method which avoids lots of repeated computation is developed for the period recognition. Then,a method called cy-clic convolutional de-interleaving is proposed to de-interleave the partitioned-and-summed version of the interleaved se-quence,and thus the frame sync code and the interleaver parameters are recovered in the meantime. The proposed methods are able to recognize the whole parameters for any interleaver and frame length combinations. Theoretical and simulation re-sults show that,compared to the existing method,the proposed methods reduce the computational complexity by a percentage ranging from around 50% to more than 90% ,and improves robustness against channel noise by more than 2dB,showing high application value in areas like cognitive radio.关键词
无线通信/认知无线电/非合作通信/信道编码/盲识别/卷积交织器/帧同步Key words
wireless communication/cognitive radio/non-cooperative communication/channel coding/blind rec-ognition/convolutional interleaver/frame synchronization分类
信息技术与安全科学引用本文复制引用
于沛东,彭华,巩克现,陈泽亮,孙海飞..利用帧同步码的卷积交织器快速盲识别方法[J].电子学报,2018,46(6):1530-1536,7.基金项目
国家自然科学基金(No.61401511) （No.61401511）
