正交频分复用水声通信自适应调制算法
发布时间：2018-07-22 14:06
【摘要】：分析预估信道长度对信道估计算法的影响规律,提出利用水声通信均衡恢复信号统计量对信道估计质量评估的方法。通过信道长度自适应修正机制,实现对未知水声信道的高精度估计。针对水声信道造成的正交频分复用子载波特性差异,基于信道估计结果,提出在码元总速率、能量约束条件下,各个正交频分复用子载波速率、功率优化分配的自适应调制算法。与传统的等功率、速率分配算法相比,新算法能够显著提升水声通信系统的误码率性能,通过仿真和实地试验,验证了研究内容的有效性。
[Abstract]:The influence of the estimated channel length on the channel estimation algorithm is analyzed, and the method of evaluating the channel estimation quality by using the equalization recovery signal statistics is proposed. The high precision estimation of the unknown underwater acoustic channel is realized by the adaptive correction mechanism of the channel length. Based on the channel estimation results, the adaptive modulation algorithm of the orthogonal frequency division multiplexing subcarrier rate and power optimal allocation is proposed under the total bit rate and energy constraints. Compared with the traditional equal power and rate allocation algorithm, the new algorithm can significantly improve the BER performance of the underwater acoustic communication system, through simulation and field experiments, The validity of the research content is verified.
【作者单位】： 海军工程大学电子工程学院;海军704厂有线车间;
【基金】：国家自然科学基金资助项目(61101205)
【分类号】：TN929.3
[Abstract]:The influence of the estimated channel length on the channel estimation algorithm is analyzed, and the method of evaluating the channel estimation quality by using the equalization recovery signal statistics is proposed. The high precision estimation of the unknown underwater acoustic channel is realized by the adaptive correction mechanism of the channel length. Based on the channel estimation results, the adaptive modulation algorithm of the orthogonal frequency division multiplexing subcarrier rate and power optimal allocation is proposed under the total bit rate and energy constraints. Compared with the traditional equal power and rate allocation algorithm, the new algorithm can significantly improve the BER performance of the underwater acoustic communication system, through simulation and field experiments, The validity of the research content is verified.
【作者单位】： 海军工程大学电子工程学院;海军704厂有线车间;
【基金】：国家自然科学基金资助项目(61101205)
【分类号】：TN929.3
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