In order to improve the anti-interference ability and stability of underwater acoustic speech communication and overcome the interruption and delay caused by digital transmission error codes in narrowband channel,the Fourier transform spread-compression spectrum modulation technique(FSCT)is used to transmit speech signals through ultrasonic frequency spreading,simulation channel transmission,and frequency compression restoration processing.By using the ultrasonic simulation signal with a certain bandwidth to transmit speech,the interferences of ocean background noise and multipath effects on digital communication can be avoided,and the real-time underwater acoustic communication can be achieved.The experimental results show that this method has a strong ability to resist multipath interference and can effectively improve the communication quality of underwater acoustic communication.th interference and can effectively improve the communication quality of underwater acoustic communication.
关键词
水声通信/快速傅里叶变换/扩压频调制/多径干扰
Key words
underwater acoustic communication/fast Fourier transform/spread-compression frequency modulation/multipath interference
维普
万方数据