Water acoustic coherently communication system and signal processing method having high code rate, low probability of error
First Claim
1. A high code rate low error probability underwater acoustic coherent communication system, including a host machine installed on a mother ship or main control underwater vehicle A and a guest machine installed on a second ship or a second underwater vehicle B, wherein the host machine comprises a transmitting transducer, a receiving line array and an electric subassembly, the transmitting transducer and the receiving line array are lowered down into water from the mother ship or the main control underwater vehicle A and electrically connected to a transmitter and a multi-channel receiver of the electric subassembly of the host machine respectively;
- The guest machine comprises a transmitting/receiving transducer and an electric subassembly, the transmitting/receiving transducer is lowered down into water from the second ship or installed in the second underwater vehicle B and electrically connected to a transmitter and a receiver of the electric subassembly of the guest machine respectively. What is characterized is that the center frequency of the communication system is ranged from 7 kHz to 45 kHz, the bandwidth is ranged from 5 kHz to 20 kHz, the receiving line array of the host machine consists of 2 to 16 hydrophones and vertically deployed underwater with space from 8 to 40 wave lengths between adjacent hydrophones, each hydrophone being non-directive in the horizontal, and the receiving sensitivity frequency response satisfy the predetermined bandwidth of the system.
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Abstract
The present invention relates to a method and a system of a high code speed low error probability underwater acoustic coherent communication for underwater transferring instruction, data and image. The communication system includes a host machine installed on a mother ship or a main control underwater vehicles A and a guest machine installed on an underwater vehicle B, wherein the host machine comprises an electronic subassembly, a transducer and a receiving line array which is vertically deployed and consists of more than two hydrophones, and the guest machine comprises an electronic subassembly and a transmitting/receiving transducer. The signal processing method of the present invention is based on the joint technology of the space diversity, the self-optimized adaptive decision feedback equalizer and self-optimized adaptive phase tracker so as to overcome the affection of motion of the channel and the vehicles, such that the received signal could be quite close to the transmitted signal, and the bit error probability is low.
37 Citations
17 Claims
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1. A high code rate low error probability underwater acoustic coherent communication system, including a host machine installed on a mother ship or main control underwater vehicle A and a guest machine installed on a second ship or a second underwater vehicle B, wherein the host machine comprises a transmitting transducer, a receiving line array and an electric subassembly, the transmitting transducer and the receiving line array are lowered down into water from the mother ship or the main control underwater vehicle A and electrically connected to a transmitter and a multi-channel receiver of the electric subassembly of the host machine respectively;
- The guest machine comprises a transmitting/receiving transducer and an electric subassembly, the transmitting/receiving transducer is lowered down into water from the second ship or installed in the second underwater vehicle B and electrically connected to a transmitter and a receiver of the electric subassembly of the guest machine respectively. What is characterized is that the center frequency of the communication system is ranged from 7 kHz to 45 kHz, the bandwidth is ranged from 5 kHz to 20 kHz, the receiving line array of the host machine consists of 2 to 16 hydrophones and vertically deployed underwater with space from 8 to 40 wave lengths between adjacent hydrophones, each hydrophone being non-directive in the horizontal, and the receiving sensitivity frequency response satisfy the predetermined bandwidth of the system.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
Specification