Interference Mitigation in Feedforward Opportunistic Communications

Jordi Borras

doi:10.1109/TCOMM.2023.3261379

2023-05-01

Jordi Borras *

G. Vazquez

DOI：10.1109/TCOMM.2023.3261379

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摘要

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.

Keyword:

Interference

Null space

Transmitters

Sensors

Receivers

Feedforward systems

Symmetric matrices

Feedforward opportunistic communications

uncoordinated distributed communications

noncooperative communications

context-aware waveform design

interference mitigation

期刊

IEEE Transactions on Communications

IF:

8.3

论文数:

1.2W

被引数:

3.6W

机构

universitat politecnica de catalunya

学者数:

1.9W

论文数: 1.6W

被引数: 17

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