Unsourced Random Access Over Frequency-Selective Channels
Mert Özateş, Tolga M. Duman
Abstract
We propose and study unsourced random access over frequency-selective channels via orthogonal frequency division multiplexing, employed to mitigate the channel effects. The decoder utilizes a compressed sensing-based joint activity detection and channel estimation algorithm coupled with an algorithm treating interference as noise and successive interference cancellation. Our results demonstrate that the proposed method offers a competitive performance with grant-based frequency division multiple access; and that, the performance loss with estimated channel state information is less than 2 dB when the number of active users is not very large.
Topics & Concepts
Computer scienceChannel (broadcasting)Orthogonal frequency-division multiplexingRandom accessJoint (building)Interference (communication)MultiplexingDecoding methodsChannel state informationFrequency-division multiplexingOrthogonal frequency-division multiple accessSignal-to-noise ratio (imaging)AlgorithmElectronic engineeringTelecommunicationsComputer networkWirelessEngineeringArchitectural engineeringIndoor and Outdoor Localization TechnologiesDistributed Sensor Networks and Detection AlgorithmsWireless Communication Security Techniques