Journal of Shanghai Jiaotong University ›› 2014, Vol. 48 ›› Issue (10): 1378-1383.

• Radiao Electronics, Telecommunication Technology • Previous Articles     Next Articles

Differential Cyclic Shift Keying Spread-Spectrum Underwater Acoustic Communication Based on Passive Time-Reversal

JING Lianyou1,HE Chengbing1,HUANG Jianguo1,MENG Qinwei2,ZHANG Qunfei1   

  1. (1. School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China; 2. School of Information and Navigation, Air Force Engineering University, Xi’an 710077, China)
  • Received:2013-10-10 Online:2014-10-28 Published:2014-10-28

Abstract:

 Accurate synchronization is more difficult in the time-variation channel. Conventional cyclic shift keying spread spectrum suffers performance impairment from timing errors in underwater acoustic communications. To solve this problem, a differential cyclic shift keying spread-spectrum underwater acoustic communication technique based on passive time-reversal was proposed. The proposed method requires only “coarse” synchronization at the symbol level. The passive time-reversal can suppress the inter-symbol interference caused by multipath. Lake experiment results show that the proposed method has no bit transmitting error at 1.8 km range; After adding the noise collected at the test, the BER is at 10-4 when SNR is -8 dB with the 5/4 shift units time error.

Key words:  underwater acoustic communication, differential cyclic shift keying spread spectrum, passive time-reversal, synchronization

CLC Number: