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Sign‐bit shaping using polar codes
Transactions on Emerging Telecommunications Technologies ( IF 3.6 ) Pub Date : 2020-07-19 , DOI: 10.1002/ett.4058 Onurcan İşcan 1 , Ronald Böhnke 1 , Wen Xu 1
Transactions on Emerging Telecommunications Technologies ( IF 3.6 ) Pub Date : 2020-07-19 , DOI: 10.1002/ett.4058 Onurcan İşcan 1 , Ronald Böhnke 1 , Wen Xu 1
Affiliation
A new polar coding scheme for higher order modulation is presented. The proposed scheme is based on multi‐level coding (MLC) with natural binary labeling, where the highest bit‐level (called the sign‐bit) is generated depending on the previous bit‐levels such that the modulated symbols approach to a target distribution to reduce shaping loss. With polar codes, the scheme can be realized by replacing the polar encoder in the sign‐bit level by a successive cancellation (SC) decoder so that the overall complexity does not increase compared to a conventional MLC scheme. Numerical simulations show that compared to conventional transmission with uniform symbol distribution, significant performance improvements can be obtained using such a sign‐bit shaping scheme. By employing more complex decoders, such as the SC list (SCL) decoder which can operate across bit levels, the proposed scheme can outperform Gallager's random coding bound.
中文翻译:
使用极性码的符号位整形
提出了一种用于高阶调制的新的极性编码方案。提议的方案基于具有自然二进制标记的多级编码(MLC),其中根据先前的位级别生成最高的位级别(称为符号位),以使调制符号接近目标分布减少成型损失。使用极性码,可以通过用连续消除(SC)解码器替换符号位级别的极性编码器来实现该方案,从而与传统的MLC方案相比,总的复杂度不会增加。数值模拟表明,与具有均匀符号分布的常规传输相比,使用这种符号位整形方案可以显着提高性能。通过采用更复杂的解码器,
更新日期:2020-07-19
中文翻译:
使用极性码的符号位整形
提出了一种用于高阶调制的新的极性编码方案。提议的方案基于具有自然二进制标记的多级编码(MLC),其中根据先前的位级别生成最高的位级别(称为符号位),以使调制符号接近目标分布减少成型损失。使用极性码,可以通过用连续消除(SC)解码器替换符号位级别的极性编码器来实现该方案,从而与传统的MLC方案相比,总的复杂度不会增加。数值模拟表明,与具有均匀符号分布的常规传输相比,使用这种符号位整形方案可以显着提高性能。通过采用更复杂的解码器,