A Simplified Soft Demapping Algorithm for 16QAM Modulation
LAN Xia
Abstract：A simplified soft demapping algorithm for 16QAM modulation is proposed,which is used for soft-decision LDPC7/8 decoding. In this way it can increase spectral efficiency. According to the signal amplitude in the coordinate system,the proposed algorithm can give the 4bit soft decision of 16QAM using addition and subtraction easily. The experimental result shows that the pro?posed algorithm can reduce computational complexity and decrease the hardware resources of giving soft decision. Thus,it is easy to design in project. Also,the decoding performance is satisfied.
Keywords：16QAMLLRhigher-order modulationsoft metricLDPC7/8
Publication Date：2019-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 64-67,137 )