An Anti-multipath Frequency Hopped Communication Technique in Shallow-water Acoustic Channels

• 作 者: 许肖梅
• 机 构: Department Of Oceanography Xiamen University, Xiamen 361005, P.R.China
• 出 处: High Technology Letters
• 发表日期: 2003年02期
• 关键词: multipath AWGN generator

This paper introduces a frequency-hopped (FH) communication system to anti-intersymbol interferences (ISI) caused by the multipath propagation in shallow-water acoustic channels, and uses high-speed digital signal processor (DSP) and serial ADC (MAX121) chip to demodulate received signal efficiently based Fast Fourier Transform (FFT) algorithm. The field experimental results show: a data rate of 1Kbit/s with the bit error rates on the order of 10 -4 is demonstrated at 2000 m in the shallow-water acoustic channel of Xiamen harbor, and the key techniques of the system is analyzed in the paper.

This paper introduces a frequency-hopped (FH) communication system to anti-intersymbol interferences (ISI) caused by the multipath propagation in shallow-water acoustic channels, and uses high-speed digital signal processor (DSP) and serial ADC (MAX121) chip to demodulate signal-based based Fast Fourier Transform (FFT) algorithm. The field experimental results show: a data rate of 1 Kbit / s with the bit error rates on the order of 10 -4 is characterized at 2000 m in the shallow-water acoustic channel of Xiamen harbor, and the key techniques of the system is analyzed in the paper.