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TURBO RECEIVERS FOR MULTIPLE-INPUT MULTIPLE-OUTPUT UNDERWATER ACOUSTIC COMMUNICATIONS
TURBO RECEIVERS FOR MULTIPLE-INPUT MULTIPLE-OUTPUT UNDERWATER ACOUSTIC COMMUNICATIONS
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机译:用于多输入多输出水下声通信的TURBO接收器
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摘要
Systems and methods for underwater communication using a MIMO acoustic channel. An acoustic receiver may receive a signal comprising information encoded in at least one transmitted symbol. Using a two-layer iterative process, the at least one transmitted symbol is estimated. The first layer of the two-layer process uses iterative exchanges of soft-decisions between an adaptive turbo equalizer and a MAP decoder. The second layer of the two-layer process uses a data-reuse procedure that adapts an equalizer vector of both a feedforward filter and a serial interference cancellation filter of the adaptive turbo equalizer using a posteriori soft decisions of the at least one transmitted symbol. After a plurality of iterations, a hard decision of the bits encoded on the at least one transmitted symbol is output from the MAP decoder.
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