Title :
High-speed underwater acoustic communication based on OFDM
Author :
Huang, Jianguo ; Sun, Jing ; He, Chengbing ; Shen, Xiaohong ; Zhang, Qunfei
Author_Institution :
Coll. of Marine Eng., Northwestern Polytech. Univ., Xi´´an, China
Abstract :
Due to multipath propagation and frequency selective fading, there are many obstacles for reliable and high data rate underwater acoustic (UWA) communication. OFDM is an attractive technique beginning used in UWA communication with three obvious advantages: good performance against multipath interference, ability to combat the frequency selective fading and the high frequency band efficiency. Recently, the researches of Refs. 1, 2, 3, 4, 5 focus on short-range UWA communication. In this paper, we pay attention to medium-range (10 km) UWA communication based on OFDM. An OFDM system is designed and realized. Several important problems are described in which the characteristics of UWA channel is analyzed, Doppler frequency shift is estimated by using cyclic prefix and compensated by resampling the received signal. Experiments in a lake were conducted and its performance is investigated. Experimental results show that the data rate reach 9 kbps and 2.8 kbps at a distance of 5 km and 10 km respectively with the bit error rate (BER) below 10-4.
Keywords :
Doppler shift; OFDM modulation; error statistics; fading channels; intersymbol interference; multipath channels; signal sampling; underwater acoustic communication; underwater acoustic propagation; 10 km; 2.8 kbits/s; 5 km; 9 kbits/s; BER; Doppler frequency shift; OFDM system; bit error rate; cyclic prefix estimation; frequency selective fading; high-speed UWA channel; multipath interference; multipath propagation; orthogonal frequency division multiplexing; signal resampling; underwater acoustic communication; Acoustic propagation; Bit error rate; Fading; Frequency estimation; Interference; Lakes; OFDM; Signal analysis; Underwater acoustics; Underwater communication; Doppler compensation; Lake experiments; OFDM; Underwater acoustic communication;
Conference_Titel :
Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2005. MAPE 2005. IEEE International Symposium on
Print_ISBN :
0-7803-9128-4
DOI :
10.1109/MAPE.2005.1618121
