自适应编码调制的一种高效半盲检测算法

An Efficient Semiblind Detection Algorithm for Adaptive Coding and Modulation(ACM)

给出一种基于协议信息的自适应编码调制高效半盲检测算法,该算法同时采用信号多序列抽取和信号多频点滑动匹配两种方法,能够有效克服中频调制信号最佳采样点偏差和频率偏差的影响,可以准确高效地识别出信号类型、信道编码方式、调制类型。实验表明,该算法在低信噪比下就能达到很高的识别率,性能明显优于传统模式识别的检测算法,具有较好的实用前景。

An efficient semiblind detection algorithm is brought forward based on protocol information for adaptive coding and modulation （ ACM）, which employs both sampling for multiple signal sequences and sweep matching for multiple frequency signal. By the two methods, the effect from the optimal sampling timing error and frequency error can be overcome effectively for modulated intermediate frequency （IF） signals. The detector can accurately identify signal type, coding mode and modulation type. Simulation result shows the algorithm has better success rate than the conventional algorithm of pattern recognition even at low SNR.