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Compressive Coded Random Access for Massive MTC Traffic in 5G Systems. (arXiv:1707.00644v1 [cs.IT])
来源于:arXiv
Massive MTC support is an important future market segment, but not yet
efficiently supported in cellular systems. In this paper we follow-up on recent
concepts combining advanced MAC protocols with Compressed Sensing (CS) based
multiuser detection. Specifically, we introduce a concept for sparse joint
activity, channel and data detection in the context of the Coded ALOHA (FDMA)
protocol. We will argue that a simple sparse activity and data detection is not
sufficient (as many papers do) because control resources are in the order of
the data. In addition, we will improve on the performance of such protocols in
terms of the reduction of resources required for the user activity, channel
estimation and data detection. We will mathematically analyze the system
accordingly and provide expressions for the capture probabilities of the
underlying sparse multiuser detector. Finally, we will provide structured CS
algorithms for the joint estimation scheme and evaluate its performance. 查看全文>>