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Tradeoff between assistance and transmission in RIS-enabled symbiotic radio

Published on:

6 November 2023

Primary Category:

Information Theory

Paper Authors:

Hu Zhou,

Qianqian Zhang,

Ying-Chang Liang,

Yiyang Pei

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Key Details

Proposes RIS partitioning to balance assistance and transmission capabilities in symbiotic radio

Derives a detector to decode the composite received signal from primary and secondary signals

Investigates the assistance-transmission tradeoff by minimizing bit error rate of composite signal

Shows optimized RIS partitioning strategy depends on channel strength ratio of direct and reflected links

Demonstrates performance gain over conventional RIS designs through analysis and simulations

AI generated summary

Tradeoff between assistance and transmission in RIS-enabled symbiotic radio

This paper studies a symbiotic radio system where a reconfigurable intelligent surface (RIS) acts as a secondary transmitter and simultaneously assists the primary transmission. To balance these dual capabilities, the RIS is partitioned into two sub-surfaces. One sub-surface assists the primary transmission via passive beamforming, while the other sub-surface transmits the secondary signal. A novel detector is proposed to decode the composite received signal. Then the tradeoff between assistance and transmission is investigated by minimizing the bit error rate of the composite signal. Results show the optimized partitioning strategy depends on the channel strength ratio of the direct and reflected links.

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