哈尔滨工程大学学报Issue(4)：482-487,6.DOI:10.3969/j.issn.1006-7043.201301031
消除冗余循环前缀的水声信道OFDM频域均衡算法
Frequency-domain equalization algorithm to eliminate redundant circular prefix for OFDM underwater acoustic communications
摘要
Abstract
The traditional OFDM frequency-domain equalization algorithm depends on the long circular prefix which decreases the utilization rate of the underwater acoustic channel. Based on the theory of modulation and demodula-tion of OFDM, a mathematical model based on the influences of multipath effects in the underwater acoustic chan-nel was established. On the basis of this, a multi-level buffering mechanism and decision feedback mechanism were introduced and a new OFDM frequency-domain equalization algorithm was proposed. The computing volume of the new algorithm was simplified and an equalizer order self-adaptive selection scheme was given. The results of the simulations and pool experiment prove that the new algorithm may effectively achieve the compensation for multipath effects in the case of a complete lack of the participation of a redundant circular prefix, which ensures reliable com-munication with high speed and low bit error rates under the condition of a limited bandwidth underwater acoustic channel.关键词
水声通信/频域均衡算法/OFDM/循环前缀/多径效应Key words
underwater acoustic communication/frequency-domain equalization algorithm/OFDM/circular prefix/multipath effect分类
信息技术与安全科学引用本文复制引用
冯成旭,许江湖,罗亚松..消除冗余循环前缀的水声信道OFDM频域均衡算法[J].哈尔滨工程大学学报,2014,(4):482-487,6.基金项目
国家自然科学基金资助项目（61101205）． （）
