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- Title
Receiver optimization on non-binary joint sparse graph for OFDM system.
- Authors
Wen, Lei; Wang, Tong; Lei, Jing
- Abstract
Low density signature for orthogonal frequency division multiplexing (LDS-OFDM) is a promising technique for multiple accesses in wireless communications, but its performance is not optimal. In this paper, we study a non-binary joint sparse graph which combines LDS-OFDM and non-binary low density parity check (LDPC) codes, namely non-binary joint sparse graph for OFDM (NJSG-OFDM). Considering the fact that syndrome computing can be utilized to improve the convergence rate of the joint detection and decoding, syndrome nodes are added to the non-binary joint sparse graph; consequently, an optimized receiver for the NJSG-OFDM is proposed and analyzed by extrinsic information transfer (EXIT) chart. Simulation results show that the optimized receiver has several advantages such as accelerating the convergence rate of the message passing, improving system performance and alleviating near-far effect. Copyright © 2017 John Wiley & Sons, Ltd.
- Subjects
ORTHOGONAL frequency division multiplexing; WIRELESS communications; SPARSE graphs; EXTRINSIC information transfer charts; SIMULATION methods &; models
- Publication
Wireless Communications & Mobile Computing, 2016, Vol 16, Issue 18, p3360
- ISSN
1530-8669
- Publication type
Article
- DOI
10.1002/wcm.2758