多路水声复合信号耦合网络与高速双向传输方法

机载声纳利用单芯同轴电缆双向传输高低压复合信号,向机载接收端传送高速率水下数据,向水下载体端传送控制命令、大功率高压电脉冲和直流电。传统传输方法的信号频分耦合网络复杂,导致系统工作时误码率高,可靠性较差。为此,提出了一种新的保护式继电器耦合网络和双向传输方法。该方法采用开关方式实现高低压回路的彻底隔离,同时基于Manchester 编解码技术,完成了大容量数据的时分双向稳定传输,使系统误码率小于10 -7,实际数据传输速率大于 7 Mbit/ s,传输距离大于500 m,保证了大动态范围高低压复合信号的可靠传输。

Coupled Network and High-speed Bidirectional Transmission of Multichannel Underwater Compound Signals

The airborne sonar transmits the compound signals that consist of high-voltage signal and low voltage signal through a coaxial cable. The high power and voltage electrical pulse,the control command and the direct current are sent to the end of the underwater carrier. The high-rate underwater data is sent from the end of the underwater carrier to the receiving end of the aeroplane. The frequency division cou- pled network of traditional transmission method is so complicated that the system has a relatively high bit error rate and lower reliability. In order to solve these problems, a novel transmission method of relay coupled network with the protection scheme and bidirectional transmission is proposed, which makes the low and high voltage circuits being isolated completely using switches. Based on the Manchester coding and decoding technique, the time-multiplexed bidirectional transmission of the large-capacity data is a- chieved. The experiments show that the bit error rate of the test system is less than 10 -7, the actual bit transmission rate is more than 7 Mbit/ s, and the maximum transmission range is more than 500 m. This method can be used for the reliable transmission of the large dynamic range compound signal.