The soft symbol to bit mapping technique is an effective way to combine the multilevel modulation and binary decoding.

比特软信息提取技术是针对多电平调制与二进制译码的结合而采用的一种方法。

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In the proposed system, based on the soft symbol to bit mapping technique, we first get the soft bit information from the received signals and then send them to the binary turbo decoders.

在本系统中，我们首先利用比特软信息提取技术将接收到的符号软信息映射成比特软信息，然后将其送入二进制译码器进行译码。

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