Abstract
A modified FSD algorithm is proposed for under-determined (UD) multiple-input multiple-output (MIMO) systems with N transmit antennas and M < N receive antennas. This paper focuses on the low-complexity detection of coded UD-MIMO systems with iterative turbo detection, where a soft-input soft-output (SISO) MIMO detector exchanges soft information with a SISO decoder. in the first iteration, a modified fixed complexity sphere decoding (FSD) method is developed by utilizing the structure of a UD-MIMO system. the modified FSD employs a new detection ordering scheme that has a lower complexity but a better performance compared to the conventional ordering scheme. from the second iteration and beyond, the MIMO detector is implemented with a generalized serial interference cancelation (GSIC) scheme and a block decision feedback equalizer (BDFE) to further reduce the complexity. Simulation results show that the newly proposed FSD-GSIC-BDFE structure can achieve significant performance gains over existing schemes, especially for systems with high level modulations. © 2012 IEEE.
Recommended Citation
C. Qian et al., "A Modified Fixed Sphere Decoding Algorithm for Under-determined MIMO Systems," Proceedings - IEEE Global Communications Conference, GLOBECOM, pp. 4482 - 4487, article no. 6503824, Institute of Electrical and Electronics Engineers, Jan 2012.
The definitive version is available at https://doi.org/10.1109/GLOCOM.2012.6503824
Department(s)
Electrical and Computer Engineering
International Standard Book Number (ISBN)
978-146730921-9
International Standard Serial Number (ISSN)
2576-6813; 2334-0983
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
01 Jan 2012
