Using Walsh-m Composite Sequence and LDPC-QPSK Joint Iteration to Reduce ISI in Long-range Underwate

• 作 者: Fang Fu Dan-Feng Zhao
• 机 构: CollegeofInformationandCommunicationEngineering
• 出 处: Journal of Harbin Institute of Technology
• 发表日期: 2013年1期
• 关键词: underwater acoustic communication JOINT iterative LDPC decoding QPSK demodulatio

To reduce inter-symbol-interference (ISI) in underwater acoustic (UWA) communication systems, a method based on LDPC-QPSK joint iteration and Walsh-m composite sequence is proposed in this paper. The method is intended for use in long-range and low signal