Soft-Output-Sparse-Aware (SOSA) Detector For Coded MU-MIMO Systems
- Authors
- Park, Gyu-Jeong; Ran, Rong; Oh, Seong Keun; Hong, Song-Nam
- Issue Date
- Sep-2018
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- MIMO detectors; sparse-aware (SA) detectors; large-scale MIMO systems
- Citation
- IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, v.67, no.9, pp.8984 - 8988
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
- Volume
- 67
- Number
- 9
- Start Page
- 8984
- End Page
- 8988
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/16076
- DOI
- 10.1109/TVT.2018.2846291
- ISSN
- 0018-9545
- Abstract
- In this correspondence, we present a novel soft-output-sparse-aware (SOSA) detector for an uplink multiuser multiple-input-multiple-output system. The proposed detector consists of two steps: First, a transmit vector is detected using a low-complexity detector; second, an improved soft-output is generated by exploiting the sparsity of a residual error vector (i.e., the difference between the transmit vector and the detected one). In contrast, the previous sparse-aware (SA) detectors used the sparsity to refine the hard-decision output of the underlying detector. Therefore, the SOSA detector can significantly outperforms the (hard-output) SA detectors for the coded systems since the former only can be well-incorporated into state-of-the-art soft channel decoders. Via simulation results, we demonstrate that the SOSA detector attains a nontrivial coded gain over the (soft-output) underlying detector with a similar complexity. Furthermore, the performance gap grows as signal-to-noise ratio and a system size grow.
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