Hybrid Message Passing Detection for OTFS Modulation

Li，Xiang; Yuan，Weijie; Li，Zhongjie

10.1109/WCNC55385.2023.10118784

2023

1525-3511

978-1-6654-9123-5

IEEE Wireless Communications and Networking Conference, WCNC

2023-March

1-5

26-29 March 2023

Glasgow, United Kingdom

Orthogonal time frequency space (OTFS) modulation which multiplexes data symbols in the delay Doppler (DD) domain has been proved to be an effective scheme for high-mobility scenarios. To realize the full time and frequency diversity promised, some promising detectors have been developed. The existence of fractional Doppler imposes new challenges to the performance and complexity of the detector. In this paper, we proposed a hybrid message passing detector for OTFS in the presence of the fractional OTFS. Based on the system model, we derive the probabilistic model of OTFS detector and represent it by a factor graph. For one Doppler index, we choose the path with the highest gain which is referred to as the main path. Then, a hybrid message passing (MP) scheme is developed, where we apply the non-approximate MP algorithm for the main paths while the Gaussian approximation-based MP algorithm is executed for the remaining paths.

detector fractional Doppler message passing orthogonal time frequency space (OTFS)

第一 ; 通讯

英语

CPCI-S ; EI

WOS:000989491900157

20232114140066

Approximation algorithms

Computer Programming:723.1 ; Data Processing and Image Processing:723.2 ; Mathematics:921

2-s2.0-85159783475

Scopus

Southern University of Science and Technology,Shenzhen,China

Li，Xiang,Yuan，Weijie,Li，Zhongjie. Hybrid Message Passing Detection for OTFS Modulation[C],2023:1-5.