Performance of Relay Interference Alignment with Imperfect Channel State Estimation

Yue Tian

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)


In this paper, we consider a multiusers' (MUs) interference network, where exist K relay-destination (R-D) pairs, and each user has a single transmit antenna and each relay has K receive antennas. To estimate the CSI of K destination-relay/relay-destination pairs, the maximum likelihood based channel estimator is proposed in K distributed relay stations. Meanwhile, by considering the estimation error in the uplink, the upper bond of sum rate loss for relay based space-time interference alignment scheme is derived in K pairs relay-destination interference network. The simulation results of sum rate performance are analyzed under different outdated CSIT scenarios.
Original languageEnglish
Title of host publicationThe URSI Atlantic Radio Science Conference 2015
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Publication statusPublished - 2015


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