期刊
IEEE WIRELESS COMMUNICATIONS LETTERS
卷 8, 期 6, 页码 1631-1634出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LWC.2019.2932674
关键词
Massive machine-type communication; iterative detection and decoding; LDPC; error propagation mitigation; multiuser detection
资金
- National Council for Scientific and Technological Development (CNPq)
- FAPERJ
T This letter studies the uplink of grant-free low data-rate massive machine-to-machine communications (mMTC) where devices are only active sporadically, which requires a joint activity and data detection at the receiver. We develop an adaptive decision feedback detector along with an l(0)-norm regularized activity-aware recursive least-squares algorithm that only require pilot symbols. An iterative detection and decoding scheme based on low-density parity-check (LDPC) is also devised for signal detection in mMTC. Simulations show the performance of the proposed approaches against existing schemes.
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