基于SOVA的低复杂度FTN信号接收算法

发布时间：2018-05-08 10:36

  本文选题：超奈奎斯特(FTN)传输信号 + 低复杂度　； 参考：《北京航空航天大学学报》2017年05期

【摘要】：超奈奎斯特(FTN)传输技术是一种高频谱效率的信号传输方式。针对FTN信号存在的码间串扰,基于软输出维特比算法(SOVA)提出FTN信号的低复杂度接收算法。根据幸存路径和竞争路径的判决结果,动态地调整每个时刻回溯过程的比较次数,降低比较次数平均值。在实际应用中,根据不影响误码性能的统计经验值直接截短回溯路径的长度。直接截短回溯深度算法可在不恶化误码率(BER)的前提下,降低比较运算次数2/3,同时减少回溯过程所需寄存器资源和延时50%以上。
[Abstract]:Ultra-Nyquist FTNtechnology is a kind of signal transmission mode with high spectral efficiency. Based on the soft output Viterbi algorithm, a low complexity reception algorithm for FTN signals is proposed for inter-symbol crosstalk (ISI). According to the decision results of survival path and competition path, the comparison times of each time backtracking process are dynamically adjusted, and the average comparison times are reduced. In practical application, the length of the backtracking path is directly truncated according to the statistical experience value which does not affect the performance of the error code. The direct truncated backtracking depth algorithm can reduce the number of comparison operations by 2 / 3 without worsening the bit error rate (BER) and reduce the register resource and delay of the backtracking process by more than 50%.
【作者单位】： 北京航空航天大学电子信息工程学院;
【基金】：国家自然科学基金(91438116) 上海航天科技创新基金(SAST2015089)~~
【分类号】：TN911.5
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本文编号：1861052