New method aimed to enhance the overall throughput of communication systems by utilizing outdated channel gain information for distributed interference compression and removal. The technology targets a dynamic environment with several distributed transmitters and receivers sharing a common medium.
Interference is the main limitation faced by today wireless technologies, mainly due to the network densification, user density and the exponential increase in wireless data traffic verified in the last years. The dynamic nature of wireless communications further exacerbates the interference problem as the transmission and reception entities are unable to adapt as fast as the radio environment dynamics; namely, when they adapt the channel/network state may be already different and then the adaptation is detrimental, instead of beneficial.
This technology proposes a method to efficiently compress and remove the interference generated by multiple receivers using only outdated channel information. Using this technology, the system throughput scales with the square root of the number of terminals (e.g., 500% throughput improvement in a scenario with 100 terminals).
Applications
The technology is applicable inscenarios with several pairs of transmitters and receivers communicating simultaneously and using the same resources:
Benefits
Development stage
TRL 3-4
Laboratorialtests have been performed,with very promising numerical results.
Commercial offering
•Licensing agreement
•Testing new applications
•Joint further developments
Target Market
ITseeks partners within information and communication technologies area (ICTs) tofurther develop, license or assign the technology, aswell aspossible end-users fortesting new applications.
Intellectual Property
-USA patent granted (US10476620)
-European patent granted (EP17751468)
Scientific publications
D.Castanheira, A. Silva and A.Gameiro, "Retrospective Interference Alignment for theK-UserM xN MIMO Interference Channel," inIEEE Transactions on Wireless Communications, vol. 15, no. 12, pp. 8368-8379, Dec. 2016,doi: 10.1109/TWC.2016.2614276.
D.Castanheira, A. Silva and A.Gameiro, "Retrospective Interference Alignment: Degrees of Freedom Scaling With Distributed Transmitters," inIEEE Transactions on Information Theory, vol. 63, no. 3, pp. 1721-1730, March 2017,doi: 10.1109/TIT.2017.2655343.
Technology ID
PI-0102
#DelayedChannelInformation
#DistributedCompression
#RepetitionCoding
#InterferenceChannel
#TransmissionOverASharedMedium
#MultiTransmitterReceiverPairs
#InterferenceAlignment
Instituto de Telecomunicações (IT) is a private, not-for-profit organization, of public interest, a partnership of nine institutions with research and development in the field of Telecommunications
IT mission is to create and disseminate scientific knowledge in the field of telecommunications.
IT is actively involved in fundamental and applied research both at national and international levels. Simultaneously it is committed to foster higher education and training, by hosting and tutoring graduate and postgraduate students. it also plays its role towards public society with public awareness initiatives, knowledge transfer to industry, and by providing consulting services on a non-competing basis.
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