New Wideband Beam-forming Method Used in Underwater Communication System  

作　　者：苏为 黄晓燕 程恩 袁飞 孙海信 

机构地区：[1]Key Laboratory of Underwater Acoustic Communication and Marine Information Technology Ministry of Education Xiamen University

出　　处：《Defence Technology（防务技术）》2011年第3期176-179,共4页Defence Technology

基　　金：Sponsored by the project supported by the National Natural Science Foundation of China(60672046);the Natural Science Foundation of Fujian Province of China(2010J05139)

摘　　要：A novel wideband beam-forming structure with constant beam width based on complex coefficients (FIR) digital filters used in underwater acoustic communication is proposed. First,the received signals are compensated with integer sampling period by using delay line. Then their complex envelopes are calculated by using frequency shift method. Finally,the envelopes are weighted by using complex coefficients FIR digital filters whose coefficients are optimized. Simulation results show that,in the communication band,the maximum difference between the designed beam and desired beam is less than 0.3 dB when the ratio of communication band to carrier frequency is 0.85.A novel wideband beam-forming structure with constant beam width based on complex coefficients （FIR） digital filters used in underwater acoustic communication is proposed. First, the received signals are compensated with integer sampling period by using delay line. Then their complex envelopes are calculated by using frequency shift method. Finally, the envelopes are weighted by using complex coefficients FIR digital filters whose coefficients are optimized. Simulation re- sults show that, in the communication band, the maximum difference between the designed beam and desired beam is less than 0.3 dB when the ratio of communication band to carrier frequency is 0. 85.

关 键 词：communication technique constant beam width underwater communication FIR filter BEAM-FORMING 

分 类 号：TN929.3[电子电信—通信与信息系统]