Paper Info
Title
Dynamic branch pruning aided low switching fixed complexity sphere decoding for small scale and massive MIMO detection
Abstract
In this article, we have proposed a dynamic branch pruning aided low switching fixed complexity sphere decoding (LSFSD) algorithm that can reduce the number of node visits in conventional fixed-complexity sphere decoder (FSD) or imbalanced fixed-complexity sphere decoder (IFSD) detector dynamically based on the channel condition. Further, we propose a low complexity QR-based FSD ordering scheme in the real domain that requires half of the number of real arithmetic operations in the conventional case. As a case study, we have simulated the proposed algorithm for 4x4 and 6x6 MIMO system with 64-QAM modulation. The simulation results show that the proposed algorithm can reduce approximately 50% of node visits to achieve a BER of 10(-3). Additionally, a low complexity solution of the soft bit information generation method is also proposed. The concept is further extended to massive MIMO applications where the number of receiving antenna to transmit antenna ratio is close to one. A smaller node extension parameter is defined for the proposed detector to reduce the complexity in massive MIMO detection. Simulation results demonstrate that the proposed detection algorithm has significantly lower computational complexity than other recent state-of-the-art detection algorithms for massive MIMO and large MIMO systems.
Year
DOI
Venue
2022
10.1002/ett.4496
TRANSACTIONS ON EMERGING TELECOMMUNICATIONS TECHNOLOGIES
DocType
Volume
Issue
Journal
33
7
ISSN
Citations 
PageRank 
2161-3915
0
0.34
References 
Authors
0
3
Name
Order
Citations
PageRank
Sourav Chakraborty138149.27
Nirmalendu Bikas Sinha200.34
Monojit Mitra300.34