Design of Unequal Error Protection LDPC Codes for Higher Order Constellations
Design of Unequal Error Protection LDPC Codes for Higher Order Constellations
复制标题
高阶星座不等差错保护LDPC码设计
DOI:
10.1109/icc.2007.157
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发表时间:
2007
期刊:
影响因子:
--
通讯作者:
Sara Sandberg
中科院分区:
文献类型:
--
作者:
Neele von Deetzen;Sara Sandberg
We present an optimization method for unequal error protection (UEP)-LDPC codes with higher order constellations. By modifying the density evolution algorithm under the Gaussian approximation, we propose a flexible code design algorithm for a variable number of protection classes and arbitrary modulation schemes with Gray mapping. Our results show that appropriate code design for higher order constellations reduces the overall bit-error rate. Furthermore, the influence on the UEP capability of the code, that is, the difference in bit-error rate between the protection classes, is investigated.