Network-Coded Multiple Access with High-order Modulations
Publication in refereed journal
已正式接受出版

香港中文大學研究人員

引用次數
替代計量分析
.

其它資訊
摘要This paper presents the first network-coded multiple access (NCMA) system prototype operated on high-order modulations up to 16-QAM. NCMA jointly exploits physical-layer network coding (PNC) and multiuser decoding (MUD) to boost throughput of multipacket reception systems. Direct generalization of the existing NCMA decoding algorithm, originally designed for BPSK, to high-order modulations, will lead to huge performance degradation. The throughput degradation is caused by the relative phase offset between received signals from different nodes. To circumvent the phase offset problem, this paper investigates an NCMA system with multiple receive antennas at the access point (AP), referred to as MIMO-NCMA. We put forth a low-complexity symbol-level NCMA decoder that, together with MIMO, can substantially alleviate the performance degradation induced by relative phase offset. To demonstrate the feasibility and advantage of MIMO-NCMA for high-order modulations, we implemented our designs on software-defined radio. Our experimental results show that the throughput of QPSK MIMO-NCMA is double that of both BPSK NCMA and QPSK MUD at SNR=10dB. For higher SNRs at which 16-QAM can be supported, the throughput of MIMO-NCMA can be as high as 3.5 times that of BPSK NCMA. Overall, this paper provides an implementable framework for high-order modulated NCMA.
出版社接受日期01.06.2017
著者Haoyuan Pan, Lu Lu, Soung Chang Liew
期刊名稱IEEE Transactions on Vehicular Technology
出版年份2017
卷號66
期次11
出版社IEEE
國際標準期刊號0018-9545
電子國際標準期刊號1939-9359
語言美式英語

上次更新時間 2021-13-05 於 03:12