Underwater acoustic communication link adaptive configuration method based on orthogonal signal division multiplexing modulation

A technology of link self-adaptation and underwater acoustic communication, which is applied in various modulation transmitter/receiver arrangements, modulation carrier system, transmission monitoring, etc., and can solve the problem of single, low channel utilization and inability to adapt to time-varying channel environment And other issues

Active Publication Date: 2021-06-04
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0006] The traditional underwater acoustic communication system uses a single modulation and demodulation configuration, which cannot adapt to the tim

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  • Underwater acoustic communication link adaptive configuration method based on orthogonal signal division multiplexing modulation
  • Underwater acoustic communication link adaptive configuration method based on orthogonal signal division multiplexing modulation
  • Underwater acoustic communication link adaptive configuration method based on orthogonal signal division multiplexing modulation

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Embodiment Construction

[0045] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0046] Technical scheme of the present invention:

[0047] 1. Set a set including OSDM modulation schemes under different Hadamard code lengths, and draw the corresponding bit error rate curves to obtain the signal-to-noise ratio interval of the corresponding modulation scheme under a given bit error rate.

[0048] 2. Set the receiving signal-to-noise ratio threshold according to requirements.

[0049] 3. While sending the RTS request channel, the sender adds a signal segment for environmental awareness.

[0050] 4. After receiving the RTS, the receiving end completes the cognition of the environment, and calculates channel-related parameters such as the receiving signal-to-noise ratio. Under the premise of ensuring the bit error rate, if the signal-to-noise ratio is greater than the receiving signal-to-noise ratio threshold set in step 2, select the OSDM commu...

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Abstract

The invention relates to an underwater acoustic communication link adaptive configuration method based on orthogonal signal division multiplexing modulation, which comprises the following steps of: setting sets of OSDM modulation schemes under different coding lengths of Hadamard, and calculating a signal-to-noise ratio interval under a given error rate; adding a signal segment for environment cognition by a sending end while sending an RTS request channel; and after receiving the RTS, by a receiving end, completing cognition on the environment and calculating and receiving channel related parameters such as a signal-to-noise ratio; by the receiving end, sending a CTS response, and feeding back the corresponding OSDM communication system to the sending end; and after the sending end receives the CTS, adjusting the OSDM communication system of the sending end according to the communication system information in the CTS, so that the corresponding DATA data is sent after the communication systems of the sending end and the receiving end are kept synchronous. Compared with link configuration directly using a single communication mode, the environment cognition link self-adaptive configuration method based on OSDM modulation is more suitable for a real underwater acoustic time-varying channel.

Description

technical field [0001] The invention belongs to the field of underwater acoustic communication, and relates to an adaptive configuration method for underwater acoustic communication links based on orthogonal signal division multiplexing modulation, in particular to an automatic environment awareness link based on OSDM modulation in a time-varying fading channel. Adapt to the configuration method. Background technique [0002] In the underwater acoustic communication network, considering the characteristics of channel time-varying fading in the transmission process, any single modulation and coding method will not be able to meet the diverse requirements for the data rate and reliability of the communication link. The modulation method with strong anti-interference ability tends to have low data transmission rate; while the modulation method with high data transmission rate usually has poor anti-interference ability, resulting in a large bit error rate. [0003] At present, ...

Claims

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Application Information

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IPC IPC(8): H04B13/02H04B17/336H04B17/382H04L27/00
CPCH04B13/02H04L27/0008H04B17/336H04B17/382
Inventor 韩晶杜玉洁马胜前马文博
Owner NORTHWESTERN POLYTECHNICAL UNIV
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