兵工学报：英文版
兵工學報：英文版
병공학보：영문판
Journal of China Ordnance
2011年
3期
176-179
,共4页
苏为%黄晓燕%程恩%袁飞%孙海信
囌為%黃曉燕%程恩%袁飛%孫海信
소위%황효연%정은%원비%손해신
communication technique%constant beam width%underwater communication%FIR filter%beam-forming
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.
