Joint low-complexity equalization and CFO estimation and compensation for UWA-OFDM communication systems

被引：17
作者：
Ramadan, Khaled [1 ]
Ramadan, Khalil F. [2 ]
Fiky, Ahmed S. [3 ]
Alam, Hasna [2 ]
Dessouky, Moawad I. [2 ]
Abd El-Samie, Fathi E. [2 ]
机构：
[1] Higher Inst Engn Al Shorouk City, Dept Elect & Elect Commun Engn, Cairo 11837, Egypt
[2] Menoufia Univ, Dept Elect & Elect Commun Engn, Fac Elect Engn, Menoufia, Egypt
[3] Higher Inst Engn Al Shorouk City, Dept Phys & Math Engn, Cairo, Egypt
来源：
INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS | 2020年 / 33卷 / 03期
关键词：
OFDM; UWA; CFO; ZC; ICI; WIRELESS COMMUNICATION; OFFSET ESTIMATION; UNDERWATER; MIMO; CHANNELS;
D O I：
10.1002/dac.3972
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Frequency synchronization has a great importance in preserving the performance of the underwater acoustic (UWA) orthogonal frequency division multiplexing (OFDM) systems. The carrier frequency offset (CFO) estimation can be blind or data-aided. In this paper, the Zadoff-Chu (ZC) sequences are used for OFDM synchronization in UWA communications, and they are compared with different data-aided algorithms. We propose a low-complexity algorithm for CFO estimation based on ZC sequences. Also, a joint equalization and CFO compensation scheme for UWA-OFDM communication systems is presented. Simulation results demonstrate that the proposed CFO estimation algorithm allows estimation of the CFO accurately with a simple implementation in comparison with the traditional schemes. Also, the performance of the UWA-OFDM system can be preserved in the presence of frequency offsets.
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页数：16
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