| With the development of wireless communication technology, requirement for communication quality in all areas is rising. Especially in the field of aviation anti-submarine, water acoustic accuracy of the data is highly demanding. The traditional transmitter sends water acoustic with analog signal, which is easily interfered by noise in the wireless channel, seriously undermining the accuracy of the anti-submarine warfare. Digital transmitter technology weakens the disruption to a certain extent. But it's still unable to meet the ever-increasing precision of air anti-submarine. However, the channel coding technology as an effective means of anti-jamming can be assurance of the reliability of underwater acoustic data transmission. The topic, mainly based on acoustic transmitter system of anti-interference to channel, does some research on channel error-correcting codes for the theoretical analysis and engineering implementation.According to wireless transmission channel interference of underwater acoustic transmitter, some channel error correction coding techniques are proposed. Considering the characteristics of the channel error-correcting codes and the requirements of communication system, an error-correcting coding method suitable for the system is ensured, that is concatenated coding scheme, which combines RS coding, interwoven technology and convolutional codes. Based on the research on the theory and encoding and decoding methods of concatenated coding scheme, simulation for the scheme is done in MATLAB to ensure coding algorithm and verify the feasibility of the program. TMS320VC5502 is used as the core processor of transmitter, and finally the realization of channel error correction program in DSP is described. Additionally, optimization for program is done through compilation to some extent. Tests in the lake show that the coding program runs fast and owns good error-correcting capability, which greatly improves wireless transmission reliability. |
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