Open AccessEXIT Analysis of Interleaver Division Multiple Access System with LDPC Code
Author(s) -
Jingxi Zhang,
Zhixiong Chen,
Shu-e Zhang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/693/1/012059
Subject(s) - low density parity check code , decoding methods , computer science , exit chart , turbo code , channel (broadcasting) , algorithm , turbo , a priori and a posteriori , detector , convergence (economics) , parity bit , concatenated error correction code , computer network , telecommunications , block code , engineering , philosophy , epistemology , automotive engineering , economics , economic growth
Extrinsic Information Transfer(EXIT) characteristics are extensively used in iterative detection and decoding of turbo type processing. This paper makes an exploratory study of the issue of EXIT characteristic analysis for Low-Density Parity Check (LDPC) coded Interleaver Division Multiple Access (IDMA) system in Multiple Access Channel(MAC) condition. By using simulation method and extrinsic information calculation, the a priori information of the IDMA detector and the extrinsic information can be gained. In the same way, the a priori information and extrinsic information of the LDPC decoder in the system can be procured. The EXIT characteristic of the detector illustrates the convergence the detection algorithm of IDMA, while the EXIT characteristic of the LDPC decoder illustrates the convergence nature of the optimized degree profile,which shows the reasonability of LDPC coded IDMA system and the reliability of the optimized degree optimized algorithm for multiple access channel.