多输入多输出选择性正交频分复用水声通信系统及方法

Multi-input and multi-output selectivity OFDM underwater sound communication system and method

Abstract

The invention relates to a multi-input and multi-output selectivity OFDM underwater sound communication system and a method thereof, having the advantages of resisting multi-path interference, resisting frequency selectivity deep fading, improving the transmission rate of information and the like. The transmitter of the system comprises a space multiplexing unit, a plurality of spectrum spreading units, a subcarrier zero setting unit, a plurality of OFDM modulation units, a multiple sonar transmitting unit and a communication channel estimation unit, wherein, the spectrum spreading units are connected between the space multiplexing unit and the subcarrier zero setting unit; the OFDM modulation units are connected between the subcarrier zero setting unit and the multiple sonar transmitting unit. A receiver comprises a multiple sonar receiving unit, a plurality of OFDM demodulation units, a communication channel frequency domain balancing unit, a plurality of dispreading units and space demultiplexing units, the OFDM demodulation units are connected between the multiple sonar receiving unit and the communication channel frequency domain balancing unit, the dispreading units are connected between the communication channel frequency domain balancing unit and the space demultiplexing unit, and the communication channel estimation unit is respectively connected with the subcarrier zero setting unit and the communication channel frequency domain balancing unit.
本发明涉及具有抗多径干扰、抗频率选择性深衰落、提高信息传输速率等优点的多输入多输出选择性正交频分复用水声通信系统及方法,其中系统的发射机包括空间复用单元、若干个扩频单元、子载波置零单元、若干个OFDM调制单元、多声纳发射单元、信道估计单元,扩频单元连接在空间复用单元与子载波置零单元之间,OFDM调制单元连接在子载波置零单元与多声纳发射单元之间;接收机包括多声纳接收单元、若干个OFDM解调单元、信道频域均衡单元、若干个解扩单元和空间解复用单元,OFDM解调单元连接在多声纳接收单元与信道频域均衡单元之间,解扩单元连接在信道频域均衡单元与空间解复用单元之间;信道估计单元分别与子载波置零单元及信道频域均衡单元连接。

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Cited By (12)

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