One-Bit Successive-Cancellation Soft-Output (OSS) Detector for Uplink MU-MIMO Systems with One-Bit ADCsopen access
- Authors
- Cho, Yunseong; Hong, Song nam
- Issue Date
- Feb-2019
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Keywords
- Massive MIMO; multiuser MIMO detection; one-bit analog-to-digital converter (ADC); soft-output decoding
- Citation
- IEEE Access, v.7, pp.27172 - 27182
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE Access
- Volume
- 7
- Start Page
- 27172
- End Page
- 27182
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/15031
- DOI
- 10.1109/ACCESS.2019.2901942
- Abstract
- We study an uplink multiuser multiple-input multiple-output (MU-MIMO) system with one-bit analog-to-digital converters (ADCs) in which one base station (BS) with Nr receive antennas serve K users with a single antenna. For this system, the soft-output (SO) detector was recently proposed where a softmetric (e.g., a log-likelihood ratio (LLR)) is computed from a hard-decision channel output by introducing a novel distance measure in the binary Hamming space. This makes it possible to be naturally incorporated into the state-of-the-art channel codes (e.g., low-density parity-check code or polar code). In this paper, we further improve the performance of the SO detector by exploiting a priori information (e.g., the previously decoded messages), which is called the one-bit successive-cancellation soft-output (OSS) detector. The key idea of the proposed OSS detector is that each user k's message is decoded sequentially via the associated channel decoder k in ascending order and a refined search-space is constructed using the previously decoded messages (i.e., the enhanced LLRs are generated). We then present a multiple OSS detector by taking into account a more practical scenario where the BS is equipped with multiple channel decoders. In addition, we propose an efficient way to determine a good decoding order by introducing a novel set-distance measure. Finally, simulation results demonstrate that the proposed OSS detector can significantly improve the existing SO detector for the coded MU-MIMO systems with one-bit ADCs.
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