A novel CCK-SCFDE algorithm used in underwater acoustic communication channels

作者：Su Wei^*; Chen Keyu

来源：Journal of Information and Computational Science, 2010, 7(13): 2927-2933.

• Binary sources
• Bit-errors
• CCK-SCFDE
• Channel equalization
• Correlation properties
• Cross-correlation property
• Data rates
• Frequency spectrum utilization
• Frequency-domain equalizers
• Low SNR
• Single carrier frequency domain equalization
• SNR gains
• Spread spectrum codes
• Underwater acoustic channel
• Underwater acoustic channels
• Underwater acoustic communications

The auto-correlation and cross-correlation properties of the complementary-code-key (CCK) codes are deduced. Then, a novel CCK-SCFDE algorithm used in underwater acoustic channels is proposed. In the proposed algorithm, CCK coding is compared with single carrier frequency domain equalization (SCFDE). The CCK code is used as spread spectrum code in order to improve the bit error performance at low SNR with less data rate loss. And the SCFDE is used to realize channel equalization with low computational complexity. In the transmitter, the binary source data are mapped to CCK codes and then the phases of these CCK codes are mapped to QPSK signals, which been transmitted by SCFDE technique. In the receiver, a frequency domain equalizer and a set of correlators are used to recover the binary source data. Computer simulation with realistic channel characters show that the proposed CCK-SCFDE algorithm has more than 3 dB SNR gain compared with SCFDE algorithm.

• 出版日期2010
• 单位厦门大学