Multi-Stage Partial Parallel Interference Cancellation Algorithm for MUSA Systems
Abstract: Multi-User Shared
Access is a non-orthogonal multiple access scheme of 5G,which has a high computational
complexity and a large time delay due to the usage of successive interference
cancellation detection algorithm. This paper proposes a multi-stage partial
parallel interference cancellation detection algorithm, which does not require
repeated ordering and repeated matrix inversion. In the first stage of detection,
the bits of these users with good channel conditions will be outputted, and the
influence of multiple access interference on users with bad channel conditions
in the second stage will be decreased. Theoretical analysis and simulation
results show that the symbol error rate of the proposed algorithm is slightly
better than that of the two-stage MMSE-PIC, and the complexity is reduced. In
the meanwhile, the computational complexity is significantly reduced without
SER performance degradation when compared with MMSE-SIC algorithm.
Keywords: Multi-User Shared
Access, non-orthogonal multiple access, successive interference cancellation,
parallel interference cancellation, symbol error rate
Author: Yan Liang, Han Wu,
Guangyu Wang
Journal Code: jptkomputergg160136
