Research on Channel State Information Feedback in Underwater Acoustic Adaptive OFDM Communication Based on Sequenced Codebook

被引：0
|
作者：
Liu S. [1 ,2 ,3 ,4 ]
Han X. [1 ,2 ,3 ]
Ma L. [1 ,2 ,3 ,4 ]
Xu J. [1 ,2 ,3 ]
Yang Y. [1 ,2 ,3 ]
机构：
[1] National Key Laboratory of Underwater Acoustic Technology, Harbin Engineering University, Harbin
[2] Key Laboratory of Marine Information Acquisition and Security, Harbin Engineering University, Ministry of Industry and Information Technology, Harbin
[3] College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin
[4] Sanya Nanhai Innovation and Development Base, Harbin Engineering University, Sanya
来源：
Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology | 2024年 / 46卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Adaptive modulation; Channel State Information (CSI); Limited feedback; Orthogonal Frequency Division Multiplexing (OFDM); UnderWater Acoustic Communication (UWAC);
D O I：
10.11999/JEIT230878
中图分类号：
学科分类号：
摘要：
As a result of the characteristics of UnderWater Acoustic (UWA) channel, such as rapid fading of Channel Frequency Response (CFR) due to large delay spreading, the development of UnderWater Acoustic Communication (UWAC) technology is challenged. The acquisition of effective and reliable Channel State Information (CSI) at the transmitter is a prerequisite for adaptive communication. To meet the needs of UWA adaptive OFDM communication, a CSI-Grouping-Sequencing-Fitting-Feedback (CSI-GSFF) based on sequenced codebook algorithm is proposed, which consists of three steps, including grouping, sequencing, and data fitting. Firstly, adjacent pilot subcarriers are divided into several groups and each group is seen as a feedback cell. Then, the pilot subcarriers within each group are sorted according to the channel gains to mitigate adverse effects such as high feedback overhead caused by the rapid fading of CFR. Finally, polynomial fitting is performed, and the sorting operation effectively reduces the fitting order. Through the simulation of time-varying channel data in sea trials, the results show that the CSI-GSFF algorithm can achieve the Bit Error Rate (BER) performance of the UWA adaptive OFDM communication system under the perfect CSI, while effectively reduce the feedback overhead. © 2024 Science Press. All rights reserved.
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页码：2095 / 2103
页数：8
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