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arXiv 0903.3204cs.ITmath.IT
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AWGN信道的广义最小距离译码保持

On Generalized Minimum Distance Decoding Thresholds for the AWGN Channel

Christian Senger, Vladimir Sidorenko, Victor Zyablov

摘要:

本文研究了加性高斯白噪声信道中的二相相移键控调制。我们的目标是使一个代数硬决定有界最小距离解码器的二进制分组码利用从解调器获得的软信息。这个想法可以追溯到Forney,并且基于将接收到的具有低可靠性的符号视为擦除。在解码器处的这种擦除是使用阈值来完成的,擦除可靠性低于阈值的每个接收到的符号。根据解码器的目标总体复杂度,该伪软判决解码可以从一个阈值T扩展到z>1个阈值T_1<.. <T_z for erasing received symbols with lowest reliability. The resulting technique is widely known as Generalized Minimum Distance decoding. In this paper we provide a means for explicit determination of the optimal threshold locations in terms of minimal decoding error probability. We do this for the one and the general z>1阈值的情况下,从最佳阈值位置问题的几何解释开始,并使用Zyablov的方法。

英文摘要:

We consider the Additive White Gaussian Noise channel with Binary Phase Shift Keying modulation. Our aim is to enable an algebraic hard decision Bounded Minimum Distance decoder for a binary block code to exploit soft information obtained from the demodulator. This idea goes back to Forney and is based on treating received symbols with low reliability as erasures. This erasing at the decoder is done using a threshold, each received symbol with reliability falling below the threshold is erased. Depending on the target overall complexity of the decoder this pseudo-soft decision decoding can be extended from one threshold T to z>1 thresholds T_1<...<T_z for erasing received symbols with lowest reliability. The resulting technique is widely known as Generalized Minimum Distance decoding. In this paper we provide a means for explicit determination of the optimal threshold locations in terms of minimal decoding error probability. We do this for the one and the general z>1 thresholds case, starting with a geometric interpretation of the optimal threshold location problem and using an approach from Zyablov.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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