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Interference Mitigation in Feedforward Opportunistic Communications
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DOI：10.1109/TCOMM.2023.3261379.png)
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Abstract
En 中文
This paper deals with scenario-aware, uncoordinated, and distributed signaling techniques in the context of feedforward opportunistic communications, that is, when the opportunistic transmitting node does not cooperate with any other node in a heterogeneous communication context. In this signaling technique, each network node individually follows a transmission strategy based on the locally sensed occupied and unused physical-layer network resources to minimize the induced interference onto other coexisting networks, taking into account the impact of the sensing errors and the locality of the sensing information. The paper identifies and characterizes critical invariance properties of the transmitted pulse shaping waveforms that guarantee the detectability of the feedforward transmitted signal by the uncoordinated receiving nodes, irrespective of the sensing signal space basis. The paper also shows that, under mild operating conditions, the proposed transmission scheme asymptotically defines efficient alternatives in the frequency domain, such as the circulant-shaping TDMA (CS-TDMA) modulation, and all of them admit a direct adaptation to frequency-selective channels. Numerical evaluation of the proposed schemes validates the provided theoretical models.
Keywords:
Interference
Null space
Transmitters
Sensors
Receivers
Feedforward systems
Symmetric matrices
Feedforward opportunistic communications
uncoordinated distributed communications
noncooperative communications
context-aware waveform design
interference mitigation
Journal
IF:
8.3
Papers:
1.2W
Citations:
3.6W