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Approximate Message Passing-Based Detection for Asynchronous NOMA | IEEE Journals & Magazine | IEEE Xplore

Approximate Message Passing-Based Detection for Asynchronous NOMA


Abstract:

A novel low-complexity multiuser detection scheme is proposed for the asynchronous non-orthogonal multiple access (NOMA). Directly applying the conventional symbol-synchr...Show More

Abstract:

A novel low-complexity multiuser detection scheme is proposed for the asynchronous non-orthogonal multiple access (NOMA). Directly applying the conventional symbol-synchronous detection techniques for the asynchronous NOMA would result in high complexity. For low-complexity, we divide one frame with a large number of symbols into several small blocks. Furthermore, for real-time and low-delay processing under the scenario with a large number of users, each block is independently processed in a parallel way by an approximate message passing-based algorithm. Furthermore, a jointly detection technique is proposed to address the large detection error in the boundary of the blocks, which is induced by the non-interaction between neighbor blocks. Simulation results demonstrate that the proposed detection scheme can achieve near optimal performance with a much lower complexity.
Published in: IEEE Communications Letters ( Volume: 24, Issue: 3, March 2020)
Page(s): 534 - 538
Date of Publication: 23 December 2019

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